410C
ELECTRONIC
VOLTMETER
OPERATING AND SERVICE MANUAL
:r
HEWLETT
•
PACKARD
11
•
o•
n
OPERATING AND SERVICE MANUAL
(HP PART NO. 00410-90005)
MODEL 410C
ELECTRONIC VOLTMETER
SERIALS
PREFIXED:
807-
Appendix C. Manual Backdating
Changes adapts this manual 10
Serials Prefixed:
311, 328. 339. 433. 532. and 550
CO\l)'l'Ight Hewlen·Packard Compan)' 1963
1'.0, Box 301, Loveland, Colorado. 80537 U.S.A.
01556-5
Printed:
SEPT 1968
Model410C
'J'able of Contents
List of Tables
' .... LI 0' CONTENTS
Section
I
GENERAL INFORMATION
I-I. Description
1-4. Instrument IdentUication
1-8. Accessories Available
"'g1-3
Section
o lNSTA LLAnON
2-1. Inspection
2-3. Installation
2-5. Rack Mounting
2-9. Three-Conductor Power Cable
2-12. PrImary Power Requirements
2-14.
Repackaging for S11lpment
"'g2-1
s.c'1on
"'g3-1
m
1-3
1-3
1-3
2-1
2-1
2-1
2-1
2-1
2-2
OPERAnON
.
3-1. Introduction
.
3-3. Adjustment of Mechanical Zero
3-5. Front and Rear Panel Description
3-7. Operatinc Procedures . . . .
3-9.
DC Voltage Measurements . .
3-11.
DC Current Measurements . .
3-13.
AC Voltage Measurements . .
3-15.
Precautions when Measuring AC
Voltage
.
Negative Pulses
..
Measurinc Resistance
.
Measuring DC Nano-Ampere Current
.
Section
IV THEORY OF OPERATION
4-1. Overall Description
4-4. Circult Description
4-5.
Input Network ..
4-16.
Modulator-DemlXluJator
4-23.
The Feedback Network
4-27.
Power SUpply
.
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-'
3-'
3-'
"'g'-I
'-1
'-1
'-1
'-1
.-2
'-2
Section
V MAINTENANCE
.
5-1. Introduction
.
5-3. Test Equipment ReqUired
5-5. Performance Checks
5-7.
Alternate Calibration Voltage
Source
.
5-9.
Mechanical Meter Zero
5-10.
DC Voltmeter Operation
5-13.
DC Ammeter Operation
5-15.
Ohmmeter Operation ..
5-17.
AmplUler Operation
5-24.
AC Voltmeter Ope.ntlon
5-28. Adjustment and Calibration Procedure
.
5-31.
Chopper Frequency Adjust
5-32.
Power Suppl)' Ch~k
5-33.
DC Voltmeter Calibration
5-36.
Ohmmeter Calibration ..
5-37.
AmplUler Output Calibration
5-38.
AC Voltmeter Calibration
5-41. Troubleshooting Procedure . .
5-48.
Servicing Etched Circuit Bouds
"'g5-1
Section
V1 REPLACEABLE PARTS
6-1. Introduction
6-4. Ordering Information
6-6.
Non-Listed Parts
"'g6-1
5-1
5-1
5-1
5-1
5-1
5-1
5-2
5-2
5-3
5-'
5-6
5-6
5-8
5-8
5-8
5-8
5-.
5-.
5-'
6-1
6-1
6-1
Appendix
A CODE LIST OF MANUFACTURERS
Appendix
B SALES AND SERVICE OFFICES
Appendix
C MANUAL BACKDA TING CHANGES
LIST 0' , .... US
Number
1-1. Spec Iflcatlons . . . . . . . . . . . . . .
3-1.
5-1.
5-2.
5-3.
5-4.
Poaslble Error when Measuring Voltage
of Complex Waveforms . . .
Recommended Test Equipment
DCV Accuracy Test
DCV Input Resistance Test
DCA Accuracy Test
01556-3
"'g1-2
3-3
5-.
5-2
5-2
5-3
Number
Pa~e
5-5. AC Accuracy Test
.
5-'
5-6. Power Supply Test
.
· 5-8
5-7. DCV Calibration Procedure
· 5-8
5-8. AC Full Seale Adjust . . . .
· 5-9
5-9. Front Panel Troubleshooting Procedure · 5-10
6-1. Reference Designation Index
· 6-2
6-2. Replaceable Parts
· 6-7
6-3. Replaceable Hardware . . .
· 6-10
III
List ollllustrations
Model41OC
LIST OF ILLUSTRATIONS
Number
Page
1-1. The 1\0 Model410C Electronic Voltmeter. 1-1
2-1. The Combining Case
2-2. Steps to Place instrument In Combining
~6e
2-0
2-3. Adaptor Frame Instrument Combination
2-4. T'wo Half Modules in Rack Adaptor
2-0
2-1
2-2
3-1. Front and Rear Panel Controls
3-2. DC Voltage Measurements
3-3. DC Current Measurements . .
3-4. AC Voltage Measurements . .
3-2
3-5
3-6
3-7
3-5. MUlmum AC Voltage Chart for 11036A
Probe
3-8
3-6. Graph Used In Calculation of Pulse Voltage Read1ngs
3-9
3-7. Resistance Measurements
3-10
3-8. DC Nano-Ampere Current Measurements 3-11
4-1.
4-2.
Block Dlagr:lm. Model410C . . . .
Modulator-Demodulator Mechanical
Analogy
4-3. SlmplUled SChematic. DC Current
Measurement
4-0
4-0
4-3
Number
Page
4-4. Simplified SChematic, DC Voltage
Measurements
. . . . . . .
4-4
4-5. Simplified SChematic. Resistance Measurement
4- 5
4-6. Simplified SChematic. AC Voltage Measurement
4-6
5-1. Allernate Callbrallon Voltage Source
5-1
5-3
5-2. DC Ammeter Open.tlon
5-3. Low Frequency Response Test .
5-5
5-4. High Frequency Response Test
5-6
5-5. Adjustment Location
5-7
5-6. Chopper Frequency Adjust 5etup
5-7
5-7. Troubleshooting Procedures.
. 5-11/5-12
5-8. Power Supply Measurements.
.5-11/5-12
5-9. Power SUpply SChematic
.5-11/5-12
5-10. Typical Amplifier Waveforms
.5-13/5-14
5-11. Amplifier SChemalic . . . . .
.5-13/5-14
5-12. Model 11036A AC Probe (Exploded View) 5-14
.5-14
5-13. Model 11036A AC Probe5chematlc
5-14. RANGE and FUNCTION Switchlng (Ptctorial) .. . . . . . . . . . . . . . . . . 5-15
5-15. Input RANGE and FUNCTION Switching
5-16
SChematic . . . . . .. .
M-ode1410C
Section 1
Figure 1-1
01556-2
1-1
Model410C
Section I
Table I-I
Table 1-1. Specifications
DC VOLTMETER
AMPLlF1ER (Cont'd)
Voltage Ranges: ±15 mv to ±1500 v full scale in 15.
50 sequence (11 ranges).
DC Drift: Less than O. 5% of full scale/year at constant temperature. Less than 0.02% of ful1 scale
Accuracy: ±2% of full scale on any range.
Input Resistance: 100 megohms ±l%on 500 mv range
and above.
10 megohms ±3% on 15 my. 50 mv, and 150 mv
ranges.
DC AMMETER
Current Ranges: ±1. 5 Ila to ±150 rna full scale in
1. 5, 5 sequence (11 ranges).
Accuracy: ±3% of full scale on any range.
Input Resistance: Decreasing from 9 K ohms on 1. 5
Ila scale to approximately 0.3 fl on the 150 rna
scale.
Special Current Ranges: ±1. 5. ±5, and ±15 nanoamps may be measured on the 15. 50. and 150
mUlivolt ranges using the voltmeter probe. with
±5% accuracy and 10 megohm input resistance.
OHMMETER
Resistance Range: Resistance from 10 ohms to 10
megohm center scale (7 ranges).
Accuracy: Zero to midscale: ±5% of reading or
±2% of midscale. whichever is greater.
±'7% from midscale to scale value of 2.
±8% from scale value of 2 to 3.
±9% from scale value of 3 to 5.
±IO% from scale value of 5 to 10.
AMPLlF1ER
Voltage Gain: 100 maximum.
AC Rejection: 3 db at 1/2 cps; approximately 66 db
at 50 cps and higher frequencies for signals less
tlmn 1600 v peak or 30 times full scale. whichever
is smaller.
Isolation: Impedance between common and chassis
is >10 meg in parallel with 0.1 ilL Common
may be floated up to 400 v de above chassis Cor
de and resistance measurements.
10c.
Overload Recovery: Recover from 100:1 overload
in <3 sec.
AC VOLTMETER
Ranges: 0.5 v full scale to 300 v in O. 5, 1. 5. 5 sequence (7 ranges).
Accuracy: ±3%of full scale at 400 cps for sinusoidal
voltages from O. 5 to 300 v rms. The AC Probe
responds to the positive peak-above-average value
of the applied signal.
Frequency Response: ±2% from 100 cps to 100 Me
(400 cps reC.) ±IO% Irom 20 cps to 100 cps and
from 100 Mc to 700 Mc.
Frequency Range: 20 cps to 700 Mc.
Input Impedance: Input capacity 1. 5 pf. input resistance >10 megohms at low frequencies. At high
frequencies impedance drops of( due to dielectric
loss.
safety: The probe body 1s grounded to chassis at al1
times for saIety. All ac measurements are referenced to chassis ground.
Meter: Individually calibrated taut band meter. Responds to positive peak-above-average. Calibrated in rms volts for sine wave input.
GENERAL
Maximum Input: (see Overload Recovery)
DC: 100 v on 15. SO. and 150 mv ranges; 500 v
on O. 5 to 15 v ranges; 1600 v on higher ranges.
AC: 100 times full scaleor 450 v peak, whichever
is less.
Power: 1150r230v ±10%. 50 to 1000 cps, 13 watts
(20 watts with 1I036A AC Probe).
Dimenstons: 6-1/2 in. high (16.5 em); 5-1/8 in.
wide (13.01 em); 11 in. deep (27.9 em) behtnd
panel. Fits 5060-0797 Rack Adapter and 1050
series combining cases.
Weight:
Output: ProJX)rtional to meter indication; 1. 5 v de
at full scale. maximum current. 1 rna.
Output Impedance: Less than 3 ohms at dc.
Noise: Less than O. 5% of full scale on any range
(p-p).
..
Nel: 8 lbs. (4.0 kg).
Shipping: approximately 14 lbs. (6.35 kg).
Accessories Furnished:
NEMA plug;
Optton 02:
~
rf't
Detachable power cord.
Model 1I036A AC Probe.
Model 410C less AC Probe.
01556-3
Section I
Model410C
Paragraphs 1-1 to 1-13
SECTION
GENERAL
INFORMATION
1-1. DESCRIPTION.
1-2. The Hewlett· Packard Model 410C Electronic
Voltmeter can be used to measure de voltage and de
currentj ac voltage and resistance. Positive and
negative de voltages (rom 15 millivolts to 1500 volts
full scale and positive and negative de currents from
1. 5 microamperes to 150 mllIiamperes can be mroBured Cull scale. Resistance from 10 ohms to 10 meg·
ohms mid-scale can be measured with an accuracy
of ±5%; resistance from 0.2 ohms to 500 megohms
can be measured with reduced accuracy. The Model
410C Electronic Vollmeter is shown in Figure 1-1;
the specifications are given in Table 1-1.
1-3. With the Model 1I036A detachable AC Probe.
lheVoltmeter can be used to measure AC voltage from
20 cps to 700 Me. From 20 cps to 100 Me, AC voltage
from 0.5 to 300 volts can be measured; from 100 Mc
to 700 Mc, refer to Figure 3-5 for maximum AC voltage that can be applied to the AC Probe. For additional information on the AC Probe, refer to Paragraph
1-8.
1-4. INSTRUMENT IDENTIFICATION.
1-5. Hewlett-Packardusesa two section, eight-digit
serial number (000-00000). The serial number is on
a plate attached to the rear panel of the instrument.
If the first three digits of the serial number on your
instrument do not agree with those on the title page
of this manual, Appendix C, Backdating Changes will
define differences between your instrument and the
Model 410C described in this manual.
1-6. ACCESSORIES AVAILABLE.
1-7. Accessories are available that extend the AC
and DC measuring capabilities of the Voltmeter. A
description of these accessories and their specifications is given below.
1-8. MODEL 1I036A AC PROBE. This accessory.
when used with the Model 410C, perm1i:s AC voltage
measurements from 0.5 volts rms to 300 volts rms,
full scale over a frequency range of 20 cps to 700 Mc .
Reference calibration accuracy at 400 cps (sinusoidal)
is::l:3%offullscale. Frequency response is ::1:10% from
20 cps to 700 Mc, with indications obtainable to 3000
:t:2%.
Mc. Frequency response at 100 Mc Is within
The Model 11036A responds to the positive-peakabove-average value of the signal applied. The Model
410C is calibrated to read in RMS volts, for sine wave
inputs.
01556-3
I
1-9. MODEL 1I039A CAPACITIVE VOLTAGE DlVlDER. This accessory (formerly the Model 452A)
extends the AC voltage range of the Model 410C to 25
kv. The divider permits measurements of extremely
high AC voltage such as encountered in dielectric
heating equipment, etc., over a frequency range of
25 cps to 20Mc. A fixed gap is provided so that breakdown will occur if the applied voltage exceeds 28 kv at
low frequencies. Voltage division is 1000:1, :t:3%, and
input capacity is 15 picofarads. A Model 110t8A
Adapter is also required to connect the Modelll036A
AC Probe to the shielded banana plug fitting of the
divider.
i-IO. MODEL 1I040A CAPACITY DIVIDER. This
accessory (formerly the Model 453A) extends theAC
voltage range ofthe Voltmeter to 2000 volts RMS. The
divider is for use at frequencies above 10 kc. Voltage
division is 100:1, :t:1%, and input capacity isapproximately 2 picofarads.
I-II. MODEL 1I042A PROBET CONNECTOR. This
accessory(formerlylheModeI455A) is used for connecting the Model 1l036A Probe across a SO-ohm
transmission line using type N connectors. The Tjoint is such that connection of the probe into a transmission line will not cause a standing wave ~tio
greater than 1. 1 at 500 Me and 1. 2 at 1000 Mc. With
this device, measurement of power traveling through
a transmission line may be made with reasonable accuracy to 1000 Mc. The usual precautions must be
takentoprovideaccurate impedance matching and the
elimination of standing waves along the line through
which power is floating. By using a dummy load at
the receiving end of this T- joint, power output of
various devices can be measured. In many applications power going intoa real load, such as an antenna,
can be conveniently measured up to 1000 Mc with good
accuracy.
1-12. MODEL 1I043A TYPE N CONNECTOR. This
accessory (formerly the Model 458A) allows the AC
Probe to be connected to a 50-ohm coaxial line. The
connector uses a male type N connector and a receptacle for receiving the probe. Terminating resistor
is not included.
1-13. MODEL 1I045A DC DIVIDER. This accessory
extends the maximum DC voltage range of the Model
410C to 30 kv. Voltage division is 100:1, :t:5%. and
input resistance is 9900 megohms. When used with
the Model 410C, input resistance Is 10,000 megohms.
This probe onera maximum safety and convenience
for measuring htgh voltages such as in television
equipment, etc. The maximum current drain is 2.5
microamperes.
1-3
SecIiOlI
n
)ll)del 410C
"-ll,1:urel 2-1 and 2-2
DIVIDER ASSEMBLY
DIVIDER LATCH
Figure 2-1.
STEP
(j)
SUll[ fOP
RT
TOL
'
STU'@
SLIDE IOTTOiI I'II.frT
TO LIMIT
~SUBMOOULE RETAINER
The Combining Case
/
I- '~
1/=... ' ol>=\
STU'@
...... ""'.
TO R[l.£&SE
®
ST£P
<V
SfEP
PLACf INS'JlUMEJrIT
I"'TO CASE
l'USt+ "" TO .....T
STEP@
PUSH UP TO LOCK
FlC'lU 2-2. Slepli to Place Iulrumenl In Comblnhll Cue
1-0
Model UOC
Section II
SECTION II
INSTALLATION
2-1. INSPECTION.
2-9. THUE·CONDUCTOI 'OWEl C.... U.
2-2. This 1natJ'ument was carefully inspected both
2-10. To protect operating personnel. the National
Electrical Manwacturers' AlIlIoclation (NEMA) recommends that the instrument panel and csblnet be
grounded. All Hewlett-Packard instrument8 are
equlppedwitha three-conductor power cable which
grounds the instrument when plugged Into an appropriate receptacle.
mecbantcally and electr1cally, before shipment. It
should be phyalcally free at. mars or scratebes aDd in
perfect electrical order upon receipt. To confirm
Ws, the instrument should be inspected for physical
damage in transit. Also, check for auppl1ed accessorIes, aDd tnt the electrical performance of the instrument uslng the procedure ouUined in Pa.ragraph
5-5, Performance Checks. If there Is damage or
deficiency, see the warranty on the inside front cover
of this manual.
2-3. INST ... ll ...TION.
2-4. The '9 Model 410C Is transistorized except for
one vacuum tube and requires no special cooling.
However, the Instrument should nol ~ operatSd where
the ambient temperature exceeds 55 C (140 F).
2-5. I ... CK MOUNTING.
2-5. The Model41OC u a submoctular unitdeaigned
for bench use. However, when used In combtaatiOD
with other submoctular units, 1t can be bench and/or
raclt mounted. The
Comblnlnc Cues and Adapter
Fl1lme are dealgnec1 apeclflcaUy for thla purpose.
e
2-1. MODELS 105IAAND 105ZA COMBlMl'«i CAS~.
The Comblnine ea.ea are full-module unlta .bleb
accept n.rloua comblaatlOll8 of aubmoctulsr units.
Belnea fuUwldlh unit, it can either be beoch or rack
mounted. An U1ustratloQ of the Combining Cue Is
ahown In FliUre 2-1. lnatruc1IOQa for lnatalllnc the
Model .flOC are shown In FIgure 2-2.
2-8. RACK ADAPTER FRAME (e Part No. 501100787). The adapter frame la a l1lck mounting frame
that accepta varioua combInations of aubmodular
unUs. It ean be rack mounted only. An Illustration
ofthesdapter frame Is given In Figure 2-3. Instructions are given below.
a. Place the adapter frame on edge or bench as
shown In step I. Figure 2-4.
b. Staclr. the submoctular units In tbe frame as
shownlnstep 2, Figure 2-4. Place the spacer clamps
between Instruments as ahown In step 3. Figure 2-4.
c. Place apacer clampaon the two end Inlltrumentll
(aee lItep 4, Figure 2-4) and push the combination Into
the frame.
cl lMert screws on either side of frame, and
tl.ghten until aubmodular InstrumenlS are tight In the
frame.
e.
2-12. '1IMAlY 'OWEl UOUIIEMENTS.
2-13. The Model .flOC can be operated from either
115 or 230 volt•• SO to 1000 cps. The Instrument can
be eaallyconverted from 115- to 230- volt operation.
The UNE VOLTAGE 8witch. 54 a two-position slide
8wltch located at the rea.r of the Instrument. selects
tbe mode of AC operation. The Une voltage from
which the Instrument lS set tooperale appears on the
slider 01 the switch. A O. 25-ampere••Io-blo (use 18
used for both 115- aDd 230-volt operation. U the
Model 410C u operated al any frequency other than
60 cps. perform chopper frequeDCy adjust (Paragraph 5-31).
.
F1UER PANEL
\
I
\
0
C
c
10
:~ ~ ~ ~ :
~:
:~
~
.
I
--I
The complete aasembly la ready for rack
rJIOUnrlna:.
015Stl-4
2-11. To prellerve the protection feature whenoperallng the Instrumenl from a two-contact outlet. use
three - prong to two - prong adapter and connect the
green pigtail on the adapter to ground.
Figure 2-3. Adapter Frame Instrument Combination
2-1
Section II
Paragraph 2-14 to 2-17
Model41OC
CD
ADAPTER
FRAME
00 NOT CHANGE THE SETTING OF THE
LINE VOLTAGE SWITCH WHEN TH.E VOLTM.ETER IS OPERATING.
2-14.
REPACKAGING FORSmPMENT.
2-15. The following paragraphs contain a general
guide for repacuging of the Instrument for shipment.
Refer to Paragraph 2-16 U the oMginal contatner ts
to be used; 2-17lf It Is not. U you hU'"e any questions,
contact your local Sales and Service Office. (See
Appendl:J: B for oUlce locations.)
e
NOTE
U the Instrument Is to be shipped to Hewlett-
Pacb.rd for sen-ice or repair, attach a tag
to the Instrument IdentUying the owner and
indicate the service or repair to be performed; include the model number and full
seMal number of the Instrument. In any
correspondence, tdentlly the lnatrument by
model number, serial number and serial
number prefl:J:.
.~------
~ ------
(i)
2-16. UtheoMglnalcontalneristobe used,proeeedaa
foUows:
sPACER CLAMP
RETAINING SCREWS
a. Place Instrument In original container U a\'allable. U oMgtnal container Is not avallable, one can
be purchased from your nearest
Sales and Service
QUlce.
Figure 2-4.
*
...._0-••
TWo Half Modules in Rack Adapter
b. Ensure1hatcontalner is well sealed with strong
tape or metal bands.
2-17. UoMgtnalcontalnerlsnot to be used, proceed
.. follows:
a. Wrap Instrument In heavy paper or
before placing In an Inner container.
plastic
b. Place packing material around aU sides of
Instrument and protect panel face with cardboard
stMps.
2-2
c. Place Instrument and Inner container ina heal'y
carton or wooden boll and seal with strong tape or
metal bands.
d. Man shipping container with "DELICATE
INSTRUMENT", "FRAGILE", etc.
Model410C
Seclion m
Pllragraphs 3-1 to 3-18
SECTION III
OPERATION
3-1. INTRODUCTION.
3-2. TheMode1410C Is used to measure AC and OC
voltage, DC current, lind resistance. All measurement Inputs are located on the front panel; a DC output connector Is located on the rear panel. Front
panel llIOntrols and Indicators are color coded. OC
voltage, DC current and resistance knobs and Indlcalors are In black; AC voltage controLs and Indicators a re In red.
3·3.
ADJUSTMENT Of MECHANICAL lno.
3·4. The procedure for adjustment of mechanical
zero Is given In Section V.
3-.5. fRONT AND lE .... PANEL DESCRIPTION.
3-6. Figure 3-1 describes the function of all front
and rear panel controls, connectors and Indicators.
The description of each control, connector and Indicator Is keyed to a drawing which accompanies the
figure.
3-7. OpnATING PROCEDURES.
3-8. Tbereareftve OI?eraling procedures: DC VoltageMeuurements, Figure 3-2; OC Current MeasuremenlS, Figure 3-3; AC Voltage Measurements, Figure 3-4; Resistance Measurements, Figure 3-'1; and
MeaaurlncOC Current In NanG-amperes. Figure 3-8.
N...
Ageing of the neon Lamps In the chopper
assembly can cause a change In chopper
frequency which produces a sUght oscillatory movement of meter pointer. If
this oscillatory movement Is observed,
rotateOsc Freq Adl A3RS (see Paragragraph 5-31) In the ccw direction until
oscilialton of pointer stops.
3-9.
DC VOLTAGE MEASUREMENTS (Figure 3-2).
3-13. ACVOLTAGEMEASUREMENTS (Figure 3-4).
ONE SlOE OF ALMOST ALL POWER
D1STRIBUTIONSYSTEMSrs GROUNDED.
EXTREME CAUTION MUST BE USED IF
DIRECT MEASUREMENT OF POWER
UNE VOLTAGES IS ATTEMPTED. IF
THE GROUND CLIP LEADISACCIDENTALLY CONNECTED TO THE
UNGROUNDED SIDE OFTHE LINE SEVERE
DAMAGE TO THE 410C IS ~IBLE
BECAUSE OF THE SHORT CIRCUIT
CREATED. POWER UNE VOLTAGES
CAN BESAFELYMEA8URED BY USING
THE PROBE TIP ONLY. CONTACTING
THE GROUNDED POWER CONDUCTOR
WILL GIVE A READING OF 0 VOLTS
UNWIIILE CONTACTING
THE
GROUNDED LEAD WILL GIVE FULL
VOLTAGE READING.
3-14. Although the Model410C indicates a rullscale
AC range of 500 volts, the optional Model 1I036A AC
Probe should not be connected to AC voltages in excess of 300 volts RMS. AC voltage reCerenced to a
DC voltage may be measured, but the AC Probe clip
(aUiptor type) must be coanected to the ground (*')
of the ctn:ult under test.
WHEN MEASURING AC REFERENCED
TO DC, THE PEAK AC VOLTAGE PLUS
DC VOLTAGE CONNECTED TO THE
PROBE MUST NOT EXCEED 420 VOLTS.
3-15. PRECAUTIONSWHENMEASURlNGAC VOLTAGE.
3-16. Special considerations must be kept In mind
when maklngAC voltage measurements. These considerations are discussed in the following paragraphs.
3-11. OCCURRENT MEASUREMENTS (Figure 3-3).
3-17. GENERAL CONSIDERATION OF COMPLEX
WAVEFORMS. WaveformS containing appreclable
harmonics or spurious voltages will introduce error
In the meter Indication.ince the meter has been calibrated to read RMS values of true sine waves while
the Model 11036A Probe Is a peak-abo\'e-a\'erage
responding device. The magnitude of error that may
be eXpe<:ted ....· hen harmoalcs are present on the measured vnvelorm Is Indicated In Table 3-1.
3-12. General Instructions for the measurement of
DC current are the same as those given for DC VOltage measurements, Paragraph 3-9.
3-18. VOLTAGE MEASUREMENTS AT FREQUENCIES BELOW 50 CYCLES/SECOND. Voltage measurements at frequencies as low as 20 cycles per
3-10. The Model UOC Is normally floating: however
a shortlnc bar can be connected at the OC AM.PUnER
OUTPUT connector on the rear panel. When the instrument Is floating. the COM Lead should not be connected
to voltages greater than 400 VDC.
01556-3
3-1
sec:tion m
figure 3-1
Model 410C
........
,
l
"
CD for
fUNCTION SELECTOR: This control is used
selecting type 01 measurement to be made.
±DC Voltage. .ux: Current. AC
Voltage. and resistance measurements.
They are:
CD AC
ZERO: This control provides adJustment for
zero-setting the meter before making AC voltage measurements.
0) MECHA?-'lCAL ZERO ADJUST:
o
Thisadjustment
mechanically zero-sets the meter prior to turning on Voltmeter.
RANGE: This control selects the full scale
meter range.
0AC POWER SWITCH: This pushbutton-lamp
combination. when depressed. turns the instrument power on or off. The pushbutton glows
when the Voltmeter power Is on.
eD ....Ith
DCA-OHMS: This lead is used in conjunction
the COM Lead to measure DC current or
ohms. The FUNCTION SELECTOR determines
which measurement Is made.
(2) COM:
This lead Is used with the input leads for
DC voltage current. DC voltage. and resUitance
measurements. The COM Lead is normally
floating; however. a shorting bar can be connected (rom the noating ground terminal to the
chassis ground terminal on the DC AMPLlnER
OUTPUT connector. If a shorting bar Is not
used. the COM Lead Is floating except when the
fUNCTION SELECTOR I. set 10 ACV.
figure 3-1.
3-2
o
DCV: This lead Is used In conjunction wilh the
COM Lead to measure :iDC voltage.
CD AC
PROBE (300V MAX): Recept3cle for telephone-type plug of Model 11036A AC Probe.
With probe connected. the Voltmeter may be
used to make AC voltage measurements.
® pointer
.. ADJUST:
This control
used to set meter
10 ..., before resistance measurements
is
are made. Only periodic adjustment or this
screwdriver adjustment Is necessary.
® sets
u..... E VOLTAGE: Thlstwo-positlonslkleswllch
the instrument to accept either 115 or 230
volt AC prlmary power.
® ampere
fUSEHOLDER: The fuseholder contains a O. 25
slow-blow fuse for both 115 vac and 230
\"2.C modes of operat Ion.
@AC POWER CONNECTOR: Acceplspowercable
supplied with the Instrument.
® age
DC AMPLlnER OUTPUT: Provides DC voltoutput proportional to meter Indlcalion for
driving external recorder. 1. 5 volls DC output for full scale meter denectlon.
@ ZERO
ADJUST: This control Is used to set
meter pointer 10 zero when calibrating for DC
and res Islance measurements.
front and Rear Panel Controls
01556-3
SecUoo m
Paragraphs 3-19 to 3-27andTable3·1
Model410C
second may be made without loss of accuracy by removing the pla5tic nose on the Model 11036A and ...sing
in Its place a 0.25 microfarad blocking capacitor in
series with the exposed contact of the probe.
THE GRAY INSULATING MATERIAL
AROUND THE AC PROBE IS POLY·
STYRENE, A LOW-MELTING POINT
MATERIAL. IT IS NOT POSSIBLE TO
SOLDt'R TO THE CONTACT WHICH IS
EXPOSED WITH TIlE PROBE KOSE
REMOVED WITHOUT
DESTROYING
TIlE POLYSTYRENE.
Table 3·1.
Possible Error When Meas...ring Voltage
of Complex Wl/Iveforms
<fJ Harmonic True RMS Val...e
0
I~
,~
5~
I~
,~
5~
".
".
".
3,.
3,.
3'.
Voltmeter Indication
100
100
100.5
90tol10
80 to 120
75 10 150
90 to 110
87 to 120
108 to 150
102
112
100.5
102
II'
3-19. VOLTAGE MEASUREMENT AT HIGH FREQUENCIES. At freq ...encles above 100 megacycles
the distance between the point of voltage m~... rement and anode of the' probe diode m...st be made as
shortaspoaalble. U feaalble, s ...bBtIt...te a amall dlac
type capacitor of approximately 50 picofarads for the
removable tip on the probe. Solder one terminal of
the buuoo capaCitor to the meaa... rement point In the
circuit and not to the probe contact. The probe contact ( with tip removed I can then cootact the other
terminal of the capacitor ror the meaa... rement.
3-20. At freq ...encles above 100 megacycles considerable voltage may be b...ilt ...p acrOlls ground leads
and along varloua part of a gro...ndlng plane. Consequently, toavoiderroneau. readlncs when meas... rIng medi...m and high frequency clrc... It., ... se tbe
ground clip lead on the shell of the probe to connect
the Circuit ground. In some cases at the higher frequenclcslt may be necesaary to ahorten the gro...ndlng
lead on the probe.
3·21. For all mea.... rement. at higher freq...encles,
hold the molc\.ed nose of the probe as far from the external ground plane or from object at ground potentlal
ascanconvenlentlybedone. Under typical conditions,
thia practice will keep the Input capacitance several
tenths of a picofarad lo....er than othenvlse.
3-22. For measurements above approximately 250
megacycles It is almost mandatory that measurements
be made on voltages wtlich are confined to cOlUlal
tranamlsslon line circulta. For applications of this
type, theModel11036A Probe Is partlc...larlysultable
beca....e the physical configuration of the diode and
probe Is that of a concentric line, and ....lth a fe.... preca...tiona It can be connected to typical cOlUlal transminion line clrcuita with Utile difflc...lty.
3-23. To connect the probe Into an ellisting coaxial
transmlssloo line, c...t the line a1ll'ay 10 the center conductor of the Ilne II exposed thro...gh a hole large
enOllghtoclearthebody of the probe. The nOllie of the
probe .hOllld be removed for this t)'pe of meas...rement .
Coonect one terminal of a button·t)l)e capacitor of approximately 50 picofar.lds to the center conductor of
thecoaxlal line so that the other terminal of the capacitor will contact the anode connection of the probe.
A close-Hulng metal shield or bushing should be arr.lnged to ground the outer cylinder of the probe to the
outer cooductor of the transmlasioo line. This t)-peof
connectloo II IIltely to ca...se lame increase in the
standing wave n.uo of the line at higher frequenclel.
The Model II042A Probe T Connector Is de.lgned to
do this job with SWR or leiS than 1.1 at 500 Mc(see
Paragr.lph 1-11).
3-24. EFFECT OF PARASITICS
ON VOLTAGE
READINGS. At frequencies above 500 mepcyclea,
leam or portions of circuits often resonate at frequencle. two, three, or fo...r limes the f...ndamental
ofthevoltagebeingmea.ured. These harmonics may
ca...se serlouserrorslnthemeter reading. Owning to
tbe resonant rise In the probe clrc... 1t at frequencies
above 1000 megacycles, the meter may be more sensitive to the harmooica than to the fundamental. To
make dependable measurement. at these frequencies,
the circuits being mca.ured nl...st be rree of aU parasiUu.
3-25. EFFECT OFne PRESENT WITH AC SIGNAL.
When measuring an AC .Ignal at a point where there
II a high DC potential, a ...ch as at the plate of a vacuum
tube, the high DC potential may cause small leakage
c ...rrent through the blocking capacitor In the tip or the
Model 11036A AC Probe. When the AC signal under
mea.... rement Is small, the error Introduced Into the
reading canbeslgnlflcant. Toa1"oidleakage. an additional capacitor ....Ith s dielectric lucb as mylar or
polystyrene which has high resistance to leakage la
required. (use 5 picofarads or higher, and insert the
capacitor between the point of meas...rement andLhe
probe tip.)
3-26. PULSE MEASUREMENTS.
3-27. POSITIVE PULSES.TheModeI11036A AC Probe!
18 peak-above- average responding and ciampI the
positive peak value of the applied voltage. Thia permits the probe to be u.ed to mcasure the poslUvevoltageampllt...de ofap...l.e, proVided the reading 0btained ia m...ltiplied by a factor determined from the
followlnc exprelalon:
1.4(1 +l
"
~)
t
I. the duration of the positive portion of the
l voltage In mlcr06econds.
t
Is the duration of the negative portion of the
2 voltage In microeeconds.
K ia a factor determined from the expression
Roltl and the graph shawn In Figure 3-6.
where Ro Is the source Impedance of the pulae
generator In kllohms, and tl II the duratioo of
the polltive portion of the pulse In micraseconds.
3-3
Model 410C
Section III
Paragraphs 3-28 to 3-34
PRF 18 the pulse repetition frequency In pulses per
3-28. NEGATIVE PULSES.
second (pps).
Suppose, for example:
t
t
10 microseconds
1
2
K
990 mlcroleconds
1.4
0.55
PRF • 1000 pps
TofindK, assumlngRo - 2 kllohm.andt l -IOmlcroseconds: Roltl • 21100 - 0.2. LocatlonO.20nthe
X uls of the graph shown as Figure 3-6, and reading
K .".hereXand Yue.lntersect the unmarked curve. If
the ratio of RoIt l were greater than I, multiply the
X and Y axes by 10, and use the curve marked "HoI
1 and Keach Xl0".
1
Solvlng the
...
I.'
I.'
exprelSion for the multiplying factor,
1
3-'
• Y0a8)-
• GIO
m
(1 • 0.01
•
(1. 01055)
•
1. 41477
3-29. Inthe case of a 10 microsecOnd negative pulse
(1 ) anda pulse repetition frequency (PRY) of 1000 pps.
tt2would be 990 microseconds. Thus Toll 1 ....ould be
approximately 0, and from the graph It is seen thai
K Is approximately O. The expression would (hen
~duce to
0.00055)
(1
•
!f.3 )
3-30. It can be seen that in the case or negative pulses
or shorl duration much smaller readings will be obtained for an equivalent poeltlve pulee. As a result.
large multtplylngfaclors must be used and unless the
pu18e yoll2.ge is large, Ihese meaeuremenls may be
Impractical.
3-31. MEASURING RESlSTANCE (Figure 3-7).
3-32. Before making reeistance measurementl,power
mllat be removed from the circuit 10 be tested. Also,
make surecapacllorsare discharged to eliminate any
relidual voltage.
3-33. MEASURING DC NANO-AMPERE CURRENT
(Figure 3-8).
3-34. The Model 410C can be used to rlleasurenanoampere leakage current In t ranllstors and dlodel. The
three most sensitive DC voltage measurement ranges
are used to measure DC nano-ampere currents.
01556-2
Model 4tOC
Section m
Figure 3-2
•
I.n_ ....
$
--
-
.....
::_~'-::::... (9
l
---
.-
o
(@@~@r@f
m!J
00
I
o
Depress the AC power switch (neon - switch
combination).
CD Set"
FUNCTION SELECTOR to pola.rlty desired
(..DCY or -DCY).
CD set RANGE desired voltage position.
10
(£) Connect
o
COM Lead to the ground of circuit
under test.
Touch DCY probe to test point.
(!)Re:td voltage on the VOLTS-AMPS scale.
Note
Aging of the neon lamps lnthe chopper assembly can cause a change
in chopper frequency which produces
a Jow amplitude oscUiator)' movement of the meter pointer. U the
meter pointer oscUlates, rotate
A3R5 CC1J untU oscUlation stops.
Figure 3-2. DC Voltage Measurements
01556-3
3-5
Model410C
Section ill
Figure 3-3
6
.y
o
elf.••.::.-::::... s
lK
"."'1."11:_ OUl",,'
(!) (!)
CD bination).
Depress theAC power switch (neon-switch comCD Set FUNCTION SELECTOR to the polarity desired (+DCA or -DCA).
(]) Set range to desired current position.
Figure 3-3.
3-6
"tv/uov"".....
(!))
®
CD Connect COl\l Lead to the I-:round or drcull under
test.
CD Connect the DCA ohms probe to the dn·ult
to
be tested.
® Read
the current on the VOLTS-AMPS Moalco
DC Current Measurements
01556-4
Section ill
Figure 3-4
Model410C
s
nUl· IIPI
*::.':::-::::..
-
$
---
~-=
•
o
OC • ......,.III1UTJ'Ul
_/nov/IH.1a
((!) (!) (!))
@
CONNECT AC GROUND CLIP AND COM LEAD TO
EARTH GROUND ONLY WHEN IN AC FUNCTION.
CD Connect
the <Ii> Model 1l036A AC Probe to the
Model 410C at the AC PROBE receptacle.
CD Set
FUNCTION SELECTOR to ACV. NOTE:
COM and chassis are internally connected when
CD Connect AC Probe clip (alligator)
to ground of
circuit to be tested. and touch probe Up to test
point. At lower frequencies COM Lead can be
substituted for the AC probe clip.
the FUNCTION SELECTOR Is set to ACV.
CD set RANGE to O. 5 V.
o
Depress the AC power button (neon-swUchcom-
binaUon) and allow 5 minute warmup.
CD Short AC Probe Tip with Ground Clip.
CD meter.
Adjust AC ZERO for a zero indication on the
Q) Set RANGE to the desired voltage range.
BEFORE MEASURING VOLTAGES
AT FREQUENCIES ABOVE lOOMC.
REFER TO FIGURE 3-5 TO DETERMINE THE MAXIMUM AMOUNT OF
VOLTAGE THAT CAN BE APPLIED
AT THAT FREQUENCY.
CD Read
AC voltage on the VOLTS-AMPS scale.
NOTE: When RANGE Is on the .0.5 V and I. 5
V positions. use red meter scale.
Figure 3-4. AC Voltage Measurements
01556-4
3-7
..,,,,
'",
~
~a_.
~ g
~
'0'8
~
325
300
270
250
225
200
175
MAXIMUM
VOLTAGE
(R"5 )
150
125
1
1
100
75
50
25
1
10
20
3-0
40 50
100
FREQUENCY (Me I
200
300 400
G_hl.llil2
:::
8.
o
;0
~
~
,
'"
~
a>
fib'1lre 3·5.
i\'laxlmum AC \"olt:lge Chart for 11036A AC Probe
o
()
Section m
Figure 3-6
Model410e
I ; INUINAl I Of PUISI
• GENEUTOI IN IIIOHMS
T ; PULSE DUUTlON IN
MICIOSECONDS
I
7
6
5
4
1m I
II
2
. f.1 !I
. "~:: !lllI'lll" II 1111
I II I':
::::.. }, !:~: :.il ,n III J i1'-lH+H+H++l1
-". ::.,
... 1::
',_.
1-'"
o
.1
.2
.3
.4
.5
.6
.7
IRot T,J
.8
.9
1.0
I
II' ,:, .
I
...,
,
Figure 3-6. Graph Used in Calculation of Pulse Voltage Readings
01556-2
3-9
Model 410C
Section ill
Figure 3-7
6
(;> ••••
:::'-:.7:...
o
6)
~~':"
-::~~
.
lie ".1"UFl(1I OUTYUl
11",,1),01/11,·.- . .
.~
((i) (i) (i))
-«.
Before making resistance measurements. remove
power from circuit to be tested. Be sure to discharge capacitors to eliminate any residual voltage.
Q) Depress AC power switch (neon-switch combination).
CD Set tile FUNCTION SELECTOR to OHMS.
CD Set RANGE to desired position.
Figure 3-7.
3- 10
@
CD Adjust
OHMS oe ADJ. control on rear panel to
obtain an
reading on the meter if necessary.
CD cuit
Connect COM and DCA OHMS leads across cirto component to be tested.
a'"'
o
Resistance is determined by multiplying the
reading on the OHMS scale by the RANGE (actor.
EXAMPLE; U reading is 1. 5 and (actor is 10K,
then resistance equals 15K ohms.
Resistance Measurements
01556-3
Section ill
Figure 3-8
Model410C
5
_.-
o
DC ....... .,.~ OUTl'UT
IIWIUOW'.... Ie
_-t-_.
CD Set
the FUNCTlONSELECTORto+DCVor-DCV
(depending on direction of current flow).
CD Set
RANGE to desired range (0.015 V. 0.05 V.
or O. 15 V range.
Note
0.015 V range = 1. 5 nano-amperes
range
0.05 V range = 5.0 nano-amperes
range
0.15 V range = 15 nana-amperes
range
CD Connect the DeV lead to the circuit under test.
oCD Connect
the COM lead to the circuit under lest.
Read nano-amperes (rom the meter on the
VOLTS·AMPS scale (top two on meter) which
corresponds to the range selected.
Figure 3-8. DC Nano-Ampere Current Measurements
01556-4
3-11
Section TV
Figure 4-1 and 4-2
r:------j1
L.°.!!~~~.!E~
lAC ZERO!
Q
AIR6
Model 410C
0"
P/O A3AI
INPUT
LEADS
,,
,
SELECTED
INPUT
:
AISl
---------------------_. __
d
I FUNCTIO~1
SELECTOR
NOTES:
R'O' PART OF.
PlOA)
P/O A3AI
CATHOOE
FOLLOWER
OEMOOULATOR
AMPL1FfER
VIA,OI, 8. 02
r-
~;~;-_.
.',\ . .
'C
MODULATOR
VI 8. Vl
NETWORK
l
PIC A>
V38. V4
VI.
II DC OUTPUT
AMPUFIER I
···
.~
\
\
~
\..
!RANGEI
..
".,.
•
"•••
•
r
"•
·
MI
M
SELECTED
FEE08ACK
".
NETWORK
"•·•
:
·
~
AtRIO
,
_____________________________ J
'
Figure 4-1.
.« . .
Ih
Block Diagram, Model 410C
IBO· PHASE
SHIFT
-.1!lV-Ft...:i:.J-
"IZII~
ov-_..L.-PIO
MODULATOR PIO A3AI
INPUT
SELECTED
INPUT
NETWORK
AISI 8 A2S2
V,
v'
.0,3.0,1
A3RZ_
I!lMV
DC
A3CI3
CATH
FOll
A3VI8
A3C!"
v,
<1!lMI/DC
v>
GAIN
COMP
NETWORK
"'
METER
Figure 4-2.
4-0
"
Modulator-Demodulator Mechanical Analogy
01556-2
Section IV
Model 410C
SECTION
THEORY
OF
4-1. OVERALL DESCRIPTION.
4-2. The Model 410C includes an input network, a
modulator-amplUler- demodulator, and a meter
circuit. A block diagram of the Model 410C Is shown
In Figure 4-1.
4-3. Signals to be measured are applied through the
appropriate input lead to the input network. AC voltages are detected In the AC probe, and therefore all
signals to the input network are DC. The input network attenuates the DC signal to a level determined
by RANGE and FUNCTION SELECTOR setUngs. The
attenuated DC voltage is applied to the modulator which
converts the DC to AC for amplUlcation. The ampUfled AC signal is converted back to DC voltage in the
demodulator and coupled to cathode follower VIB. The
cathode follower output to the DC AMPLIFlER OUTPUT connector and meter circuit Is a DC voltage
proportional to the amplitude of the signal applied to
the input. A portion of the voltage to the meter circuit
is returned to the modulator as feedback. When the
feedback voltage and attenuated DC voltage are nearly
equal, the meter stabilizes.
4-4.
CIRCUIT DESCRIPTION.
IV
OPERATION
lator input The network presents an input impedance
of 10 megohms on the three most sensitive ranges and
100 megohms on aU other ranges.
4-10. The resistor Rl (located in the DCV probe) in
conjunction with resistors A2R10 through A2R26, provides the 10 megohm input impedance required for the
three most sensitive DeV ranges. Resistors A2R4
andA3R30 are shunted out of the circuit by the RANGE
switch on the three most sensitive DCV ranges.
4-11. When using the eight less sensitive ranges,
A2R4 and A3R30 are placed in series with R1 and
A2R10 through A2R26 to present more than 100 megohm impedance to the input.
4-12. A3R30 is used to calibrate full scale on the
1500 volt range. (See Paragraph 5-35.)
4-13. RESISTANCE MEASUREMENTS. The purpose
of the input network shown in Figure 4-5 is to place
approximately 0.6 volt DC source in series with a
known (reference) resistance. The resistance to be
measured is placed in parallel with the known resistance, which changes the voltage proportionally. The
maximum changes in voltage applied to the modulator
is 15 mv because of attenuation provided by A2R4,
A3R:l0, and AIR2.
4-5. INPUT NETWORK.
4-6. The input network includes a precision voltage
divider, which by means of the FUNCTIONSELECTOR
and RANGE switches, provides a maximum of 15 millivolts at the modulator input regardless of the range
set and signal applied. The :tDCA, ±DCV, OHMS, and
ACV modes of operation are discussed below.
4-7. DC CURRENT MEASUREMENTS: Refer to Figure 4-3, throughout this explanation. The pUI1>0se of
the input network is to provide proper attenuation of
currents applied. Currents from 1. 5 Jla to 150 ma
full scale are applied with input impedance decreasing
from 9K ohms on the 1.5 Jla range to approximately
0.3 ohms on the 150 rna range.
4- 8. The change in input impedance is varied by using
DC current shunts in conjunction with RANGE switch
A2Sl. The DC voltage developed across these shunt
resistors, when applied through the modulator-amplifier-demodulator network to the meter, provide a
deflection on the meter proportional to the DC current
being measured.
4-9. DC VOLTAGE MEASUREMENTS. Refer to
Figure 4-4 throughout this explanation. The purpose
of the input network is to accurately attenuate the input signal to a maximum of 15 m volts at the modu01556-4
4-14. A DC current of approximately 60 rna is
supplied at the junction of A2R22 and A2R23 through
A7R10, R3, A2R2andA2R1to the input network. The
OHMS aoADJ., R3, sets the meter for fullscale(oc).
Resistor A2Rl is shorted out in the XIM position of
the RANGE switchj resistors A2R1 and A2R2 are
shorted out in the XI0M range. The resistors A2R2
and/or A2R1 are electrically removed from the circuit to increase the voltage at the junction of A2R22
and A2R23. This is done to compensate for the loadIng of the attenuator (A2R4, A3R:l0, and AIR21 on
these ranges.
4-15. AC VOLTAGE MEASUREMENTS. Refer to
Figure 4-6 throughout this explanation. Voltage at
the AC probe is converted to DC and applied to the input network. The input signal is attenuated to produce
a maximum of about 15 millivolts at the modulator input. AC zero adjustment of meter pointer is made
with the AC ZERO control.
4-16. MODULATOR-DEMODULATOR.
4-17. RefertotheAmplifierSchematic,Figure5-11 ,
and to the Mechanical Analogy Schematic.
Figure
4-2 throughout this explanation·.
4-18. The input network applies approXimately 15
millivolts DC, for full scale meter deflection (positive or negative, depending on the polarity of the
4-1
Section IV
voltage or current being measured)to the neon-photoconductor chopper. Also applied to the opposite side
of the chopper is the amplifier feedback voltage. which
is of the same polarity and approximately 5 microvolts lower in amplitude than the input voltage. The
modulator-chopper consists of two photoconductors,
A3AI VI and A3AI V2, which are alternately illuminated
by two neon lamps, A3Al»Sl and A3AIDS2, respectively. The neon lamps are part of a relaxation oscillator whose frequency is controlled by A3R5. The
oscillator frequency is nominaIly set to 100 cps for
operation from 60 cps power line. or to 85 cps for
50 cps line. This frequency is selected so that it is
not harmonically related to the power line frequency,
precluding possible beat indications on the meter.
4-19. As the photoconductorsare alternately illwninated by the neons, their respective resistances are
low (conductive) when illuminated and high (non-conductive)when darkened. Therefore, the input voltage
and feedback voltage are alternately applied to the
input amplifier. The amplitude of the resultant signal
to the amplifier is the voltage difference between the
input and feedback voltages.
Model 410C
4-25. FEEDBACK NETWORK FOR .DCA. OHMS.
AND ±DCV. Figures 4-3, 4-4and4-5 show the feedback configuration for all positions of the FU CltlON
SELECTOR except ACV. The meter is electrically
inverted for ±DCV and ±DCA modes of operation.
The DC OUTPUT ADJ .• A6R20 sets the output voltage. The DC pot. A6R18 determines the amount of
feedback to the modulator. The resistor A2R30 is in
the circuit in the ±.OI5 DCV and ±l. 5lia modes of
operation, to decrease feecD>ack and thus increase
ampliiier gain to compensate for the decrease in input
signal to the modulator on these ranges.
4-26. FEEDBACKClRCUIT FORAC VOLTAGE MEASUREMENTS. Figure 4-6 shows the feedback configuration for the ACVposition of the FUNCTION SELECTOR switch, AISl. The resistors that are placed
in the circuit by the RANGE switch program the amplifier gain to compensate for the non-linear response
of the AC probe. A6R16 and A6CRl compensate the
non-linear response of the AC probe to the linear
calibration of the upper meter scale on the 5 volt
range.
4-27.
4-20. The chopped DC sign."!.l is amplified by a three
stage HC amplifier, consisting of A3VIA, A3Ql and
A3Q2. The amplified signal to the inp.1t of the demodulator-choP!JCr is 1800 out of phase with the output of the modulator-chopper.
4-21. The demodulator-chopper consists of two photoconductors. A3Al V3 and A3Al V4, which are alternately illuminated by neon lamps A3AIDSI and A3AIDS2,
respectively. Appl'oximately 150 millivolts squarewave isapplied tothe demodulatorfrom the amplifier.
Since the same neon lamps illuminate both the modulator and demodulator photoconductors, operation of
the two choppers is synchronous. Therefore, when
A3AIVI is sampling the input voltage, A3A1V3 is
clamping Ule amplified and inverted difference voltage toground. Alternately, whenA3A1V2 is sampling
the feedback voltage, A3AIV4 is charging capacitors
A3C13 and C3CI4 to the peak value of the square-wave.
These cap.'1citors maintain this charge so long as the
input voltage remains constant by virtue of having no
discharge [Xlth and because they are being repetitively
recha rged by the demodulator.
4-22. Therefore, a DC potential, proportional to the
difference between the input and feedback voltages, is
applied to the grid of the cathode follower and subsequently to meter circuit and DC AMPLIFIER OUTPUT
connector. A portion of the meter circuit voltage is
fed back to the modulator. The meter stabilizes when
the feedback vollage and input voltages are nearly
equal.
4 -23.
THE FEEDBACK NETWORK.
4-24. The feedback network dri"es the meter and
determines the DC gain of the amplUier. The feedback is "aried depelldingon the position of the FUNCTION and RANGE selectors. The dUferent feedback
configurations are discussed below.
4-2
POWER SUPPLY.
4-28. PRIMARY POWER.
Refer to Ftgure 5-9
through-out this explanation. Either 115 or 230 volt
ac power is connected through fuse Fl $0. 25 amp slowblow) and switch 51 to the primary of power transformer T 1. Switch S2 connects Tl primaries in plrallel
for 115 volt operation of in series for 230 volt operation.
4-29. UNREGULATED AND ZENER REGULATED
POWER SUPPLY. Full wave rectilier CRI and CR2
produces unregulated +270 volts. which is used to
drive the photochopper neons. Unregulated + 175 volts
and + 140 volts are tapped off and are used to prOVide
B... to the plates of A3V1B and A3VIA. respectively.
Zener regulators A7CR6 and CR7 provide regulated
+38 volts and -9 volts to bias A3QI and A3Q2. Filtering of the outputs is provided by the RC network
conslslingol A7Ri through A7R3 and C5A through C5D.
4-30. SEAlES REGULATED POWER SUPPLY. The
output of the full wave rectUier CR3 and CR4 is regulated by transistor QI, which is connecl'ed in series
with the outp.1t. Zener diode A7CR8 provides reference
voltage to the base ofQl. Regulated +6 \JOlts is supplied to the filaments of A3VIA/B and the AC Probe
diode A8Vl. +0.6 volts is provided through A7R10
to R3, the OHMS GO ADJ. control. Filtering of the
outputs is prOVided by C6A and C6B.
4-31. STANDBY FILAMENT SUPPLY. The lilament
tap (Tl, Pins 1 and 2) provides 6.0 volts ac to the
filament of the AC probe diode, A8VI, so that the
filament remains warm when the Model 410C is being
used in modes of operation other than ACV. When
FUNCTION selector AISI is switched to ACV. 6.0
volts ACis removed from the filament and 6 volts DC
is applied. Therefore. the ACV mode is ready for
immediate use, without wailing for the filament to
warm up.
01556-4
-
-'"'",
o
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8.
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(FUNCTION I
mill
l-oCA I
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Figure 4-3.
Simplified Schematic. DC Current Measurement
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Figure 4-4. Simplified Schematic. DC Voltage Measurements
-...
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Figure 4-5. Simplified Schematic, Resistance Measurement
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Figure 4-6. Simplified Schematic, AC Voltage Measurement
o
()
Section V
Table 5-1
Model410C
Table 5-1. Recommended Test Equipment
Instrument Type
Required Characteristics
Use
Recommended Model
Voltmeter Calibrator
Range: 0.015 to 300 v
Frequency: Dc and 400 cps
Accuracy: ±O. 3% ae
±O. 2% de
AC and DC Accuracy fj Model 738BR VoltChecks and Calibrameter Calibrator
tion Adjustments
Oscillator
Frequency: 20 eps to 10 Me
Output: 2.0 v
Frequency Response
Test
DC Power Supply
Range:
DC Voltmeter
Range: 10 v
Accuracy: ±O.2%
Accuracy Checks;
Power Supply Measurements; Troubleshooting
fj Model 3440A/3441AI
3443A Digital Voltmeter
VHF Signal
Generator
Frequency: 10 Me to 480 Me
Output: l.Ov
Frequency Response
Test
"" Model 608 VH F Signal Generator
UHF Signal
Generator
Frequency: 480 Me to 700 Me
Frequency Response
Test
"" Model 612A UHF Signal Generator
AC Voltmeter
Range: 120 v
Power Supply Measurements (ripple)
"" Model 3400A RMS
Voltmeter
Electronic
Counter
Frequency Range: to at least 102 cps
Chopper Frequency
Adjust
I, Model 5211A Elee-
Ohmmeter
Range: 100 M II
Accuracy: .5%
Troubleshooting
"" Model 412A DC VTVM
Micro-Potentiometer
Frequency Range: 10 Me to 700 Me
Output Voltage: 0.44 v rms
Accuracy: NBS calibrated
Frequency Response
Test
Ballantine Model 440
Micro- Potentiometer
Probe-T-Connector
For use with 50 ohm transmission line
Frequency Response
Test
'I, Model 11042A Probe-
Connector
Adapter
Type N male to BNC female
Frequency Response
Test
Connector
Adapter
BNC to binding post
Frequency Response
Test
Connector
Adapter
Type "N" male to Type "N" female
Frequency Response
Test
Frequency Range: 10 Me to 700 Me
Low reflection
Frequency Response
Test
Male BNC to female BNC
Performance Checks
10 M II
Accuracy: .1%
Performance Checks
., Part No. 0730·0168
56 K
Accuracy: .1%
Performance Checks
., Part No. 0730-0053
10 K
Accuracy: .1%
Performance Checks
., Part No. 0727-0157
I K
Accuracy: .1%
Chopper Frequency
Adjust
~
50 Sl termi-
nation
50 ohm feedthru
o to
10 v continuous
DC Ammeter Accuracy fj Model 723A DC Power
Checks
Supply
Resistors:
1.5K
Accuracy: .1%
Performance Checks
56 ohms
Accuracy: .1%
Performance Checks
10 ohms
Accuracy: .1%
Performance Checks
5-0
fj Model 652A Test
Oscillator
lronic Counter
.,
Part No. 1250-0067
rIr
Part No. lO110A
T-Connector
.,
.,
""
Part No. 11501A
Part No. 908A
Model 110488
Part No. 0727-0751
Part No. 0730-0017
"" Part No.
"" Part No.
""
0811-0341
0727-0335
01556-4
Model41OC
Section V
Paragraphs 5-1 to 5-11
SECTION V
MAINTENANCE
5-1. INTRODUCTION.
provide the necessary voltage values required. However. the ~ Model 738BR Voltmeter Calibrator is the
preferred instrument for these operations.
5-2. This section contains maintenance procedures
for the Model 410C Electronic Voltmeter.
5-9.
5-3. TEST EQUIPMENT REQUIRED.
a. Turn instrument on.
minute warm-up period.
5-4. The test equipment required to maintain and
adjust the Model 410C ts listed In Table 5-1. Equipment having similar characteristics may be substituted (or items listed.
Allow at least a 20
b. Turn voltmeter off. and allow 30 seconds for
all capacitors to discharge.
5-5. PERFORMANCE CHECKS.
c. Rotate mechanical zero-adjustment screw on
front panel clockwise until pointer reaches zero.
moving up scale.
5-6. The performance checks presented in this section are front panel operations designed to compare
the Model 410C with its published specUlcal1ons.
These operations may be incorporated in periodic
maintenance. post repair and incoming quality control
checks. These operations should be conducted before
any attempt. is made at instrument calibration or adjustment. During performance checks. periodically
vary the line voltage to the Model 410C. ±IO% on ellher
115 v or 230 v operation. A 1/2 hour warm-up period
should be allowed before these tests are conducted.
5-7.
MECHANlCAL METER ZERO.
d. U for some reason the pointer should overshoot zero. repeat step c until desired results
are obtained.
e. When pointer has been positioned at zero.
rotate zero-adjust screw slightly counterclockwise to free it. U meter pointer moves to the
left during this action. repeat steps c and e.
5-10. DC VOLTMETER OPERATION.
ALTERNATE CALIBRATION VOLTAGE
SOURCE.
5-11. ACCURACY CHECK (DCV).
5-8. Should it be necessary to use the ~ Model 738AR
Voltmeter Calibrator to conduct these Performance
Checks. the arrangement described in Figure 5-1 will
a. Short Model 410C DeV probe to COM lead;
set pointer to zero using rear panel adjustment
(ZERO ADJ).
VOLTMETER CALIBRATOR
hp 73BAR
0
0
1I
,
j
......
,oov
I
~
.,
@
0
0
\.')
0
o
,;00_
,
·2001<,.10.2%,114 WATT • • • • hpPART NO.
0
08l1~2
AOOlTIONAL CALIBRATION LEVELS MAY BE OBTAINED
BY PROfI'ORTIQNALLY REDUCING THE MODEL HeAR
OUTPUT LEVEL.
• 2001<
,
'00.
_
~
Figure 5-1. Alternate Calibration Voltage Source
01556-3
5-1
Section V
Paragraphs 5-12 to 5-16
Table 5-2
b. Set the Model 410C FUNCTJO SELECTOR
to the +DCV position; RANGE switch to. 015 V.
Connect Model 410C DCV and COM cables to the
Voltmeter Calibrator (~ Model 738BR) output
terminals.
Model41OC
c. Adjust voltmeter calibrator and Model 410C
to settings listed in Table 5-2.
d. Model 410C should indicate readings within
limits specUied. If not. refer to Paragraph
5-33 for adjustment procedure.
Table 5-2.
DCV Accuracy Test
Voltmeter
Calibrator
Settings
Model410C
Range Settings
a. Figure 5-2 describes the test arrangement
required for this operation. The following additional equipment w11l also be required:
Model41OC
DC Power Supply
Meter Readings
Voltage
.015 V
.05 V
.15 V
.5 V
1.5V
5V
15 V
50V
150 V
500 V
1500 V
•. 015
•. 05
•. 15
•. 5
.1. 5
.5
.15
.50
• 150
.300
.300
5-14. ACCURACY CHECK (DCA).
.0147 to .0153 V
.049 to .051 V
.147to.153V
.49 to .51 V
I. 47 to I. 53 V
4.9 to 5. I V
14.7toI5.3V
49 to 51 V
147 to 153 V
290 to 310 V
270 to 330 V
(ilt
Model 723A)
DC Voltmeter (I/f Model 3440A/3442A)
10 Il. 1%. I w resistor
(<6'
Part No. 0727-0335)
56 Il. 1%. 1/2 w resistor (~PartNo. 0811-0341)
10 K. 1%. I w resistor ('" Part No. 0727-0157)
56 K. 1%. I w resistor (~ Part No. 0730-0053)
b. Connect the Model 410C as shown in Fib"Ure
5-2; FUNCTION SELECTOR to +DCA: RANGE
to 150 MA .
c. Use 56 ohm resistor for RI and 10 ohm resistor for R2.
.
5-12. INPUT RESISTANCE CHECK (DCV).
mISe'
a~t
an external resistor. Rtseries' of
10
0370-0168) In series
b 'Wet
libra tor and the DeV
c
of t
el
d. Adjust dc power supply to obtain readin~ on
dc voltmeter specified in Table 5-4; chanJ..:'c III
and R2 according to Table 5-4.
e. Model 410C should read within limits spc<'i(jed in Table 5-4. If not. refer to ParaJ.,:'raph
5- 33 for adjustment procedure.
5-15. OHMMETER OPERATION.
5-16. OHMMETER ACCURACY CHECK.
a. A 10 ohm :1:1% resistor (~ Part No. 07270335) and a 10 M .1% resistor
Part No.
0730-0168) will be required for this test.
(+
CV Input Resistance Test
Voltmeter calibrator
Settln
Mod
Voltage
5-2
.015 V
'.05 V
.15 V
.015
.05
.15
.00715 to .00
.0238 to .0255
.0715 to .0765 V
10 Mil
10 Mil .3
10 Mil .3%
.5 V
1.5V
5V
15 V
50V
150 V
500 V
1500 V
.5
1.5
5
15'
50
50
.453 to .455 V
I. 360 to I. 365
53 to 4. 55 V
60 to 13.65
45. to 45. 5 V
136.
0 136.5
272. 0
272. 5
272.0 to 72.7
100 Mil .1%
100 Mil .1%
100 MIl.I%
o MIl.I%
Mil .1%
1l.1%
.1%
1%
V
V
V
V
V
NOTE: Input resistance test is dependent on calibration of Model 410C.
01556-3
Model410C
Section V
Paragraphs 5-17 to 5-19
hp410C
ELECTRONIC
VOLTMETER
POWER SUPPLY
hp 723A
I~I
D~
@
0
fjl) @
00,,,,,,0
0
o~.
I
.,
.,
OIGITAL
VOLTMETER
RANGE
SELECTOR
h P 3440A
hp3441A
[I~ol
I
r
.,OC_I·Gln..
Figure 5-2.
Table 5-4.
DC Ammeter Operation
DCA Accuracy Test
Model HOC
DC Voltmeter
Model410C
Range Settings
Readings
Meter Readings
150 MA
50 MA
15 MA
5MA
1.5 MA
.5MA
1.4V
.4 V
.14 V
.04 V
.014 V
.OQ4V
135.5 to 144.5 MA
38.5 to 41. 5 MA
13.55 to 14.55 MA
3.85 to 4.15 MA
I. 35 to 1.45 MA
0.385 to O. 415 MA
56
56
56
56
56
56
150 lJ.a
50 lJ.a
15 lJ.a
5 IJ.'
I. 5 lJ.a
I. 38 V
0.46 V
0.138 V
0.046 V
0.014 V
133.5 to 142.5 lJ.a
44.5 to 47. 5 lJ.a
13.35 to 14.25 IJ.'
4.45 to 4. 75 lJ.a
I. 36 to I. 45 lJ.a
56
56
56
56
56
b. Set Model 410C FUNCTION SELECTOR to
OHMS; RANGE to RXIO.
c. Set pointer to 0:1 using rear panel adjustment
(OHMS ADJ) if required.
d.
I
{l
R
2
{l
10
10
10
10
10
10
K
K
K
K
K
10
10
10
10
10
K
K
K
K
K
panel of Model 410C. Set DC Voltmeter RANGE
to 10 V.
c. Set Model 410C FUNCTION SELECTOR to
+DCV; RANGE to .015 V.
Connect COM and DCA OHMS cables across
10 ohm resistor.
e.
R
Meter should read 10 ohms (±S%).
d. Adjust voltmeter calibrator for +.015 VDC
output.
f. Set Model 410C RANGE to RXIOM. Replace
10 ohm resistor with 10 M ohm resistor.
e. The dc voltmeter should read +1. 5 v. This
will verify a gain of 100. where the gain equals
g.
Ene out / Ene in'
r. 11 dc voltmeter does
Meter should read 10 M ohms (.5%).
h. If both of these ranges function properly. it
can be assumed that the remainder will also.
l! meter does not function properly. refer to
Paragraph 5- 36 for adjustment procedure.
not read at least 1. 5 v.
refer to Paragraph 5- 37 for proper adjustment
procedure.
5-19. AC REJECTION CHECK.
5-17. AMPLIFIER OPERATION.
5-18. AMPLIFIER GAIN CHECK.
a. An Oscillator (<It Model 200SR) and an RMS
Voltmeter (~Model 3400A) are required for thts
check.
a. Connect Voltmeter Calibrator (~ Model
738BR) output to Model 410C DCV and COM
cables.
b. Set 410C FUNCTION SELECTOR to -DCV;
RANGE to .015 V.
Connect DC Voltmeter (~ Model 3440A/
3441A) to DC AMPLIFIER OUTPUT on rear
c. Connect Oscillator output to Model 410e DeV
and COM cables and input of rms voltmeter. Set
rms voltmeter to read 10 v.
b.
01556-3
5-3
Section V
Model4IOC
d. Adjust test oscillator to provide 3.18 v (4. 5
v peak) reading on rms voltmeter at 50 cps.
5-23. OVERLOAD RECOVERY CHECK.
e. Model 410C should not read more than 2. 25
mv verifying 66 db ac rejection at 50 cps.
a. Connect Voltmeter Calibrator (~ Model
738BR) output to Model 410C DCV and COM
cables.
!. Increase frequency to check ac rejection
above 50 cps.
b. Set Model 4IOC FUNCTION' SELECTOR to
+DCV; RANGE to .15 V.
g. Switch Model 410C FUNCTION SWITCH to
+DCV and repeat steps e arxl !.
c. Adjust voltmeter calibrator for +0.15 vdc;
note reading on Model 410C.
d. Readjust voltmeter calibrator for +15 VDC
outputj wait 5 seconds for complete saturation;
then switch voltmeter calibrator back to +. 15
VDC output. Note time required for meter to
return to original position.
5-20. OUTPUT LEVEL CHECK.
a. A Voltmeter Callbrator (~ Model 738BR)
anda DC Voltmeter (<@ Model 3440A/3441A) will
be required for this check.
b. Connect dc voltmeter to dc amplifier OUTPUT on Model 410C rear panel. Place ground
lead between Model 410C circuit ground and
earth ground terminals. Set dc voltmeter RANGE
to 10 V.
c. Set Model 4IOC FUNCTION SELECTOR to
+DCV; RANGE to 1. 5 V.
d.
Adjust Voltmeter Calibrator to provide +1. 5 v.
e. Model 410C and dc voltmeter should read
1. 5 v.
!. II dc voltmeter does not read at least 1. 5 v,
refer to Paragraph 5-37 for proper adjustment
procedure.
5-21. AMPLIFIER OUTPUT IMPEDANCE CHECK.
a. Connect an external DC Voltmeter (~ Model
3440A/3441A) to Model 410C DC AMPLIFIER
OUTPUT terminals on rear panel.
e. Recovery time should be less than 3 sec.
5-24. AC VOLTMETER OPERATION.
E~:~!!~~]
WHEN MEASURING AC VOLTAGES, DO
NOT PERNUT AC GROUND JUMPER OF
MODEL 410C AC PROBE TO CONTACT UNGROUNDED SIDE OF AC SOURCE OR SERIOUS DAMAGE TO 410C WILL RESULT.
5-25.
AC VOLTMETER ACCURACY CHECK.
a. Set Model 410C RANGE to O. 5 V. Short the
input of the AC Probe. Adjust ZERO vernier for
zero pointer denection.
b. Connect ACV probe to the Voltmeter Calibrator (hp Model 738BR).
b. Set Model 4IOC FUNCTION SELECTOR to
OHMS position; RANGE to RXI0K.
c. Adjust voltmeter calibrator for 400 cps-rms
output.
c. Record voltage indicated on external dc voltmeter for use as a reference.
d. Set Model 410C FUNCTION SELECTOR to
ACV; RANGE to 500 V.
d. Connect a 1. 5 K ohm ±1% resistor (~ Part
No. 0730-0017) across Model 410C DC AMPLIFIER OUTPUT terminals. Dc voltage recorded
in step c above should not change more than 3
mv, indicating that dc amplifier output impedance is within the 3 ohm specification at dc.
e. Adjust the voltmeter calibrator to settings
listed in Table 5-5. Model 410C should indicate
readings within limits specified. If not, refer
to Paragraph 5~38 for corrective action. Record
Model 410C reading with 0.3 v input.
NOTE
5-22. AMPLIFIER NOISE CHECK.
a. Connect extern.'ll DC Voltmeter (~ Model
3440A/344IA) to the DC AMPLIFIER OUTPUT
or Model 410C.
b. Set the Model 4IOC FUNCTION SELECTOR
to +DCV; RANGE to 1500 V.
c. Short the Model 410C DCV and COM cables.
External dc voltmeter reading should be less than
7.5 mv.
d. Reset Model 4IOC RANGE to 1. 5 V.
Voltmeter should read less than 7. 5 mv.
NOTE
II Model 4IOC DC OUTPUT is
used for recording. the chopper
frequency can be adjusted to minimize output noise. Refer to
Paragraph 5-31.
5-4
DC
The frequency response tests are performed
using reference voltage obtained with 0.3 v
input.
Table 5- 5
AC Accuracy Test
Voltmeter Calibrator
Model410C
400 cps
Range
Voltage Selector
500 V
150 V
50 V
15 V
5V
1.5V
.5 V
.5 V
300
150
50
15
5
1.5
.5
.3
Model410C
Readings
285 to 315 V
141:"5 to 154.5 V
48.5 to 51. 5 V
14.15 to 15.45 V
4.85 to 5.15 V
1. 415 to 1. 545 V
.485to.5I5V
.285to.315V
01556-4
Model4lOC
Section V
a Probe-T-Conneclor (-hp- Model l1042A),
a Micropotentiometer (Ballantine Model 440).
and a DC Voltmeter (-hp- Model 3440A/344IA)
are required for this check. Figure 5-4
describes test arrangement to be used.
5-26. AC VOLTMETER LOW FREQUENCY RESPONSE
CHECK.
a. A TestOsclllator(-hp-ModeI652A), a BNCto-Binding Post Adaptor (-hp- PartNo.lOllOA)
and a 50 ohm Feed-th.ru Termination (-hpPart No. l1048B)are required!or this check.
NOTE
b. Connect Model 410C as shown in Figure 5-3.
The micropotentiometer must have
the proper radial resistance and
current rating to deliver 0.30 v
at its output.
c. Set Model 410C FUNCTION SELECTOR to
ACV; RANGE to O. 5 V.
d. Set Test Oscillator frequency to 400 cps, and
adjust amplitude to give same 410C reading
as recorded in Paragraph 5-25, step e. with.
0.3 V Input.
e. Set Test Oscillator REF SET to convenient
level.
f.
Adjust frequency of TestOscUlator to various
cardinal points between 20 cps and 10 Me.
resetting amplitude to reference level set in
step c for each frequency. Model 410C readings
should be the same as the reading set at 400
cps In step d .10% from 20 cps to 100 cps,
and .2% from 100 cps to 10 Mc.
5 c27. Ac VOLTMETER mGH FREQUENCY
SPONSE-CHECK.
RE-
a. A VHF Signal Generator (-hp- Model S08C),
a UHF Signal Generator (-hp- Model 6I2A),
b.
Set UHF oscillator output to provide output
to Model 410C reading recorded in Paragraph
5-25, step c, with. 3 v input; frequency to
10 Mc. Record dc voltmeter reading for reference.
c. Vary VHF oscillator frequency from 10 Mc to
480 Mc maintaining reference dc voltmeter
reading by readjusting VHF oscillator output.
Model 410C reading should be the same as the
reading set at 400 cps in Paragraph 5-26,
step d, ±2% at frequencies to 100 Mc, and
± 10% at all higher frequencies.
d. Replace VHF oscillator with UHF oscillator
in Figure 5-4. Repeat steps band c for UHF
oscillator output frequencies from 480 Mc to
700 Me.
hp 410C
ELECTRONIC
VOLTMETER
TEST OSCILLATOR
hp652A
0
~
,
50-_
F[EO-THIlU
RESISTOR
4,1104
h~§'J
0
@
@
0000
,,,
,
--;,...
• -;>..,
'plOlIOA
III
Figure 5-3. Low Frequency Response Test
01556-4
5-5
Section V
Paragraphs 5-28 to 5-31
Figure 5-4
Model410C
VHF
SIGNAL GENERATOR
hp 60SC
hp 410C
ELECTRONIC
VOLTMETER
HIGH GAIN/AUTO
DIGITAL VOLTMETER RANGE UNIT
hp 3440A
~I
I
r'f@
cl:J
0
.
hp 3443A
I
@
;v'
hp tr50lA
TYPE"N" MALE
()
@
0000
l....~
~
/~
hp 9011A
50n TERMINATION
hp II042A
'"
PROSE "T" CONNECTOR
TYPE"N" F'EMALE
QI
0
@
-·-Ct
• - iIlII
UHF
SIGNAL GENERATOR
hp 612A
QI
~
.
•
Figure 5-4. High Frequency Response Test
5-28. ADJU·STMENT AND CALl8RATION
PROCEDURE.
5-29. The following is a complete adjustment and calibration procedure for the Model 410C. These operations should be conducted only if it has previously
been established by Performance Checks. Paragraph 5-5. that the Model 410C is out of adjustment.
Indiscriminate adjustment of .the internal controls to
"reline" settings may actually cause more difficulty.
If the procedures outlined do not rectify any discrepancy that may exist, and all connections and settings
have been rechecked. refer to Paragraph 5-41, Troubleshooting. for possible cause and recommended corrective action.
5-30. Remove top and bottom covers and two side
panels; refer to Figure 5-5 throughout this procedure
for location of adjustments.
5-31. CHOPPER FREQUENCY ADJUST.
a. A Voltmeter Calibrator (iii, Model 738BR).
an Electronic Counter (rfi Model 5211A). and an
AC Voltmeter ('¥ Model 3400A) wUl be required
for this operation.
5-6
b. Use ac voltmeter to verify Model 410C line
voltage of 115 v. Chopper frequency will vary
with line voltage variations.
c. Connect Model 410C. electronic counter, and
voltmeter calibrator as shown in Figure 5-6.
d. Set Model 410C FUNCTION SELECTOR to
+DCV; RANGE to 1. 5 V.
e. Adjust voltmeter calibrator to supply +5 v
de to the Model 410C.
f. Observe counter, and adjust A3R5 for a
chopper frequency of 100 cps (±2 cps) if operated
on a 60 cps line. If operated on 50 cps line, adjust A3R5 for a chopper frequency of 85 cps (±2
cps
g. If line frequency is other than 50 or 60 cps
or if fine adjustment of chopper frequency is desired to minimize noise. connect ac voltmeter
with RANGE for 0.01 V to Model 410C DC Amplifier OUTPUT.
h. Adjust A3R5to give minimum voltage reading
on ac voltmeter.
01556-3
__~'~"'~2:,
Model 410C
~:--=:~
~ection
FFigures 5- and 5-6
V
.,,,. '''20
A6R3
D
80
.,
A6R!l
0
0
0
.'OC-.-OIft
A3R31
A3R30
A6R7
A6R18
AfiRl"
.
Figure 5-5. Adjustment Loc ahan
VOLTME TER CALl8RATOR
hp 7388R
-
1
ELECT~ONIC COUNTER
P 5211A
@
DODD
L
,0
©
00
-J
----...
hp 410C
ELECTRON IC 1_ ..J
1!2."(JI;:
VOLTMETE R
k-~HOPP£JIl
jS>ASS£M!lLY
1~YIEW
Del to'
...J
Figure 5-6.
01556-3
Chopper ;requency
, ; ; : ; ; Ad)
- ;ust
: ; :setup
;-;;;;;;-----------5-7
Section V
Paragraphs 5-32 to 5-37
Model 410C
5-32. POWER SUPPLY CHECK.
d. Select proper A6RI8 setting which will provide best overall full scale readings for O. 0 IS V.
0.05 V. and O. IS V ranges. Adjust A3R30 Cor
best overall Cull scale readings Cor ranges above
o. IS V.
a. Refer to Table 5-6 and Figure 5-8 for Power
Supply check points and typical voltage values.
Measure dc voltages between COM lead and designated location on A7.
NOTE
-
Table 5 G Power Supply Test
Voltage
+175
+38
+6
-9
V
V
V
V
Location on A7
(Figure 5-8)
A6RI8 must be adjusted belore
A3R30. because A6RIS aICects
all ranges and A3R30 onlyallects
ranges above 0.15 V.
Tolerance
903
Junction of CRG and R4
926
Junction of CR7 and R7
±30
±8.0
%0.6
±1.8
V
V
V
V
5-36. OHMMETER CALIBRATION.
a. Set Model 410C FUNCTION SELECTOR to
OHMS; RANGE to RXIOM.
b. Short OHMS and COM cables.
should read zero.
b. Measure +175 volt ac ripple across 903 and
COM with ac voltmeter (~ Model 3400A). RMS
value of ripple should not exceed 5.0 mv.
c. Vary Model 410C RANGE switch through remainder of OHMS settings. Meter should read
zero, except at RXIO when meter should read
about O. 1 ohms (resistance of leads).
5-33. DC VOLTMETER CALIBRATION.
5-34. DC ZERO ADJUSTMENT AND BIAS.
a. Set Model 410C Function Selector to +DCV
and Range Switch to O. 5 V.
Model 410C
d. Disconnect OHMS and COM cables. Set
OHMS ADJ (rear panel) for GO reading. Check
GO reading on all OHMS RANGE settings.
5-37. AMPLIFIER OUTPUT CALIBRATION.
b. Short DCV Cable to COM Cable.
c. Adjust A3R21 fully counterclockwise. then
rotate about 20 degrees clockwise.
d. Adjust ZERO ADJ on rear panel for zero
meter deflection. Switch to -DCV. If any deflection is observed. adjust ZERO ADJ to return meter pointer halfway back to zero. Check
zero set ling on all ranges for both +DCV and
-DCV. Zero offset shall not exceed 1% in any
case.
5-35. DC FULL SCALE ADJUST.
a. Connect Model 410C DCV and COM cables
to Voltmeter calibrator (~Mndel 738BR) output
terminals.
b. Set Mndel 410C FUNCTION SELECTOR to
the +DCV position; RANGE switch to 0.015 V.
c. Adjust voltmeter calibrator to settings listed
tn Table 5-7.
a. A Voltmeter Callbrator (<5' Model 738BR)
and a DC Voltmeter (<5' Model 3440A/344IA) is
required Cor this calibration.
b. Set Model 410C FUNCTION SELECTOR to
+DCV; RANGE to 5 V.
c. Adjust voltmeter calibrator to provide 5 V.
Set dc voltmeter RANGE to 10 V.
d. Connect Model 4l0C DCV probe and COM
lead to output of voltmeter calibrator. Connect
dc voltmeter to dc amplifier OUTPUT on Model
410C rear panel.
e. Adjust A6R20 to give 1. 5 v reading on dc
voltmeter.
NOTE
Amplifier output will provide a
negative voltage for all negative
dc and ac inputs. The AC Probe
is designed to provide a negative
dc voltage to Model 410C.
Table 5-7. DeV Calibration Procedure
5-8
Model410C
Voltmeter Callbrator Settings
Model410C
Range Setltngs
Voltage
Meter Readings
.015 V
.05 V
.15 V
.5 V
1.5V
5V
IS V
50 V
ISO V
SOOV
lSOO V
.015
.05
. IS
.5
1.5
5
IS
SO
ISO
300
300
.0147 to .0153 V
.049 to .051 V
.147to.153V
.49 to . 51 V
I. 47 to I. 53 V
4.9 to 5. I V
14.7 to 15.3 V
49 to 51 V
147 to 153 V
290 to 310 V
270 to 330 V
Adjustment
A6RI8
A6RI8
A6RI8
A3R30
A3R30
A3R30
A3R30
A3R30
A3R30
A3R30
A3R30
01556-3
Section V
Paragraphs 5-36 to 5-50
Model410C
5-38. AC VOLTMETER CALIBRATION.
5-39. AC ZERO ADJUST.
a. Set Model 410C FUNCTION SELECTOR to
ACV; RANGE to O. 5 V. Ensure full insertion of
telephone plug from ac probe into Model 410C.
b.
Sel AC ZERO vernier on front panel to center
of rotation.
c. Short Model 410Cacprobeandac probe common (short lead).
d. Adjust A3R31 Cor Model 410C approximately
zero deflection.
e. Fine adjust AC ZERO vernier for Model 410C
zero deflection.
.after it has been established that the difficulty cannot
be eliminated by the Adjustment and Calibration Procedures. Paragraph 5-28. An investigation should
also be made to insure that the trouble is not a result
of conditions external to the Model 410C.
5-43. Conduct a visual check of the Model 410C for
possible burned or loose components. loose connections. or any other obvious conditions which might
suggest a source of trouble.
5-44. Table 5·9 contains a summary of the frontpanel symptoms that may Qe encountered. It should
be used in initial efforts to select a starting point for
troubleshooting operations.
5-45. Figure 5-7 contains procedures which may be
used as a guide in isolating malfunct.tons.
5-40. AC FULL SCALE ADJUST.
E~:~!!~~)
WHEN MEASURING AC VOLTAGES. DO NOT PERMlT AC
GROUND JUMPER OF MODEL
410C AC PROBE TO CONTACT
UNGROUNDED SIDE OF AC
SOURCE OR SERIOUS DAMAGE
TO 410C WILL RESULT.
a. Connect Model 410C ac probe to voltmeter
calibrator output terminals. Set Model 410C
FUNCTION SELECTOR to ACV; RANGE to O. 5
(
5-46. The checks outlined in Figure 5-7 are not designed to measure all circuit parameters. rather only
to localize .the maUunction. Therelore. it is Quite
possible that additional measurementswUI be required
to completely isolate the problem. Ampl trier gain
may also vary slightly between instruments; therefore
it should not be necessary to precisely duplicate waveforms or values described.
5-47. Reler to Figure 5-10 for typical waveforms
encountered in the Model 410C. Waveforms represent
signals which occur when instrument is operating
during overdriven conditions (0.5 vdc input to O. 015
v RANGE).
V.
5-48. SERVICING ETCHED CIRCUIT BOARDS.
b. Adjust voltmeter calibrator to settings listed
in Table 5-8 at 400 cps-rros output.
5-49. The <It Model 410C has three etched circuit
boards. Use caution when removing them to avoid
damaging mounted components. The r1e Part Number
for the assembly is silk screened on the interior of
the circuit board to identify it. Refer to Section VI
for parts replacement and ~ Part Number information.
c. Adjust potentiometers called for under "Adjustment'· to provide Model 410C readings listed.
Table 5-8. AC Full Scale Adjust
Voltmeter
Model4l0C Calibrator
AC Voltage
Range
Settings
.5 V
1.5V
5V
• 15 V
'5OV
• 150 V
·500 V
. 50
1.5
5
15
50
150
300
Model410C
Reading
Adjustment
±3%
.5 V
1.5V
5V
15 V
50V
150 V
300 V
A6R3
A6R5
A6R7
A6R14
A6R14
A6RI4
A6RI4
• A6R14 is proper adjustment of Model 410C for
RANGE settings from 15 vac to 500 vac. select
proper A6R14 setting which will provide best
overall results for these ranlres.
5-41. TROUBLESHOOTING PROCEDURE.
5-42. This section contains procedures designed to
assist in the isolation of malfunctions. These procedures are based on a systematic analysis of the
instrument circuitry in an effort to localize the problem. These operations should be undertaken only
01556-3
5·50. The etched circuit boards are a plated-through
type. The electrical connection between sides of the
board is made by a layer of metal plated through the
component holes. When working on these boards.
observe the following general rules .
a. Use a low-heat (25 to 50 watts) small-tip
soldering iron. and a small diameter rosin core
solder.
b. Circuit components can be removed by placing the soldering iron on the component lead on
either side of the board. and pulling up on lead.
If a component is obviously damaged. clip leads
as close to component as possible and then re·
move. Excess heat can cause the circuit and
board to separate. or cause damage to the component.
c. Comp:ment lead hole should be cleaned before inserting new lead.
d. To replace components. shape new leads and
insert them in holes. Reheat with iron and add
solder as required to insure a good electrical
connection.
5-9
Section V
Model410C
e. Clean excess fllL" from the connection and
adjoining area.
r.
To avoid surface contamination of the printed
Table 5-9.
circuit. clean with weak solution of warm water
and mild detergent after repair. Rinse thoroughly with clean water. When completely dry,
spray lightly with Krylon (H1302 or equivalent).
Front Panel Troubleshooting Procedure
FRONT PANEL SYMPTOM
No meter deflection with input.
not glow ing.
POSSIBLE CAUSE
ON - OFF lamp
Check fuse (Fl) on back panel.
In -DCY, pointer deflects 1/2 scale.
In +DCY, po nter pegs downscale.
Check A3C5 (Figure 5-11).
In +DCY, pointer pegs downscale.
In -DCY, pointer pegs upscale.
Check A3QI, A3C6 or A3CI2 (Figure 5-11).
Excessive jitter.
cept RXI0M.
Check A2R2 (Figure 4-5).
Ohms function; all ranges ex-
"DCA mode out on 50 rna and 150 rna ranges.
Check A2R25 and A2R26 (Figure 4-3).
*If r.r ADJ is effective in ranges from RXlO to
RXIM, then shifts when RANGE switch is set to
RXIOM.
Check A2R2 (Figure 4-5).
"'AC ZERO will not adjust properly.
sponds to input varialions.
Check AIR5, AIR6, AIR7 and A3R31 (Figure 4-6).
Pointer re-
"'Opel'ates in DCY mode on ranges O. 015 v to O. 15
v. but fails on higher ranges.
Check A2R2 and A3R30.
Dc amplUier output is +1. 5 v. Meter will not deflect full scale in DCV or DCA mode.
Check A6R21. A6R20, A6RI. A6RI8 and A6RI7
(Figure 4-4).
"Meter pegs upscale on all ranges. +DC Amplifier output is high regardless of mode of operalion.
Check for open resistor in amplUier feedback loop
or shorted AIRI0 (Figure 5-11).
In ACV mode, pointer will not deflect full scale
with proper input applied.
Refer to Paragraph 5-38.
Operates on all ranges in ACY mode except 5 v ac
position.
Check A6RI6 and A6CRI (Figure 4-6).
Instrument inoperative in all modes.
slight random drift pattern.
Meter has
Check chopper assembly. Connect 1 M ohm resistor
across A3AIVl. If photocell were open, meter will
now resIXlnd to input. Use 100 K resistor across
A3AIV3 to check DC - Modulator (Figure 5-10).
Meter oscillates full scale at rate of 5 - 10 cps.
Check chopper assembly. Connect 1 M ohm resistor
across A3Al V2. If photocell were open, instrument
will now respond to inplt. Use 100 K resistor across
A3AIV2 to check DC - Modulator (Figure 5-10).
No ac zero.
Check Cl for short to chassis (Figure 4-6).
Check ac probe.
No deflection on OHMS; de ranges operative.
Check OHMS and DCA lead for short to common at
alligator clip.
0.5 and 1. 5 VAC range will not track.
Check A8VI (Figure 5-13). Substitute known good
ac probe.
5 VAC range will not track.
Check A6CRl.
• Refer toeD, Table 5-7.
5-10
01556-4
FALSE
FALSE
FALSE
I
FALSE
TRUE
7
TRUE
5
TRUE
3
TRUE
4
41OC·1KI
CD Check
power supply voltage values using the
procedure outlined in Paragraph 5-32.
voltIf
CD.
ages are correct. proceed to
If voltages
are incorrect. proceed t00.
If maUunction appears in the power supply, and
\.V adjustment of the chopper frequency to 100 cps
o
o
o
pertinent component values. Check pertinent dc voltages under conditions liste<t in NOTE No.4.
Measure the dc voltage at Pin 1. A3. This voltage
is typically 13-15 mv. If this voltage is correct,
proceed t00; if not. proceed t00·
does not reduce the error. refer to Figure 5-8
Investigate switch circuit. Refer toasterisks in Table
for further investigation. Check voltage and
5-9 for hints on how to troubleshoot switch circuit.
resistance values listed with Model 410C
FUNCTION +OCV; RANGE 0.015 v; INPUT
Observe input voltage todemodulatorU!' usin~ an os+0.015 v. When deviation is noted. trace circilloscope. Refer to Figure 5-10for normal wavecult investigating for faulty component.
form under overdrivenconditions specified. Uw:l.veWith Model 410C FUNCTION SELECTOR to
form is normal, proceed to(!);iInot, procecdtoQ).
+DCV; RANGE 0.015 v; overdrive with a +0. 5 v (DinveSUgate the demodulator and cathode follower
input. Measure the dc voltage at the DC AMAIV3B. Refer to Figure 5-11 for typical \'oltag-e and
PUflER OUTPUT on Model 410C rear panel.
parameter values under conditions listed in NOTE
No.4. Refer to Table 5-9 for method to check
Output should be approximately +4.0 v. If this
measurement is correct. disconnect source and
for open demodulator.
short DCV probe and COM lead. If output is tg\ Investigate the modulator and amplifier to include
zero. proceed to fi';
if not. proceed to Ii'. \V
\!.J
\.:.J
AIVIA, Qland Q2. Refer to Figure5-J1 Cor typical
Trace circuit from Pin 11. A3 to Pin 2. A6.
voltage and parameter values undercondiliollslislcd
Use ohmmeter to checkvaluesofA6R21, A6R20.
In NOTE No.4
Refer to Table 5-9 for method to
A6R17 and A6Rl. Refer to Figure 5-11 for
check for open modulator.
G)
CD
o
Figure 5-7. Troubleshooting Procedures
I
85j
S601(
I
I
I
+1.~lV
VOLTS
,.(.
,.~
--{
R'
A7
POWER
SUPPLY
ASSEMBLY
'(.
"'W
~14.7
VOlTS J ~
,.~
0
908(-
I e. II
I 13.St.fll II
I
I
.~
~
'0)
o.
9 46(_
72
+6.0
0
IHrlI
II
0
II
..
,
251<
+280
I
0
901.l-~. 90 926~
,~
~
~
928 _
+145
j
CR'
...
9O'W
(I
I
I
I
I
0
I
I
241(
+22:5
900)
II
II
301<
0
'fEST CONDITIONS
••
~
II
II
II(
1.5
t.11(
+1.5
I
I
.~
r-
RT
.
.(.
Tn
I
I
121(
-0.22
.(
1/
II
,
VOLTAGE
RESISTANCE
NOTE
FUNCTION: .DeV
RANGE: .015 V
iNPUT: +.015 V
REFERENCE: Circuit
ground Vhl
Inslrument: OFF
FUNCTION: .DeV
RANGE: .015 V
INPUT: DeV Shorted
to COM
-
Voltage and resistance values listed
are approximate values for a typic.al
instrument. Deviations should be
in the most significant CiJ,.rufC before
circuit tracing is warranted.
Figure 5-8.
Power Supply Measurements
~
-8.4
SecUon V
Model410C
1.
NOTES
---INDICATES AN ASSEMBLY. ALL
COMPONENTS LOCATED ON AN ASSEMBLY ARE PREFIXED BY
THE ASSEMBLY DESIGNATION (e.g., R3 ON ASSEMBLYA7
BECOMES A7R3).
2. UNLESS OTHERWISE INDICATED:
RESISTANCE IS IN OHMS.
CAPACITANCE 15 IN MICROFARADS.
3.
*.
4.
\.il2t
CABINET GROUND.
rh .. CIRCUIT GROUND (FLOATING).
DENOTES WIRE COLOR USING STANDARD COLOR CODE.
(e.g. i-WHITE, a-GRAY, O .. BI.J.CK.)
!I.
P.
c=:J INDICATES
t
I
I
I
I
I
I
&
,
q
~
~R.'
.,
,
~
~
~
1---
I
A7R2
3300
•
I
I
I•
A7R4
13K
38\1 ~-:
-
f- ,903J
•
c••
20
c••
20
•
c.c •
20
.9Z8,
~c.o
20
CR2
0
- r
~
~'7CR'
1.r;IJr
I
I
9V'
I
I
~
I
~'7
CR7
- 9V
_4,l~~2~.~...;...--_4r_---+-------l--~.~.~V~
,....
•
'"'
r;
A7R!
15K
I
51
I
I
I
I
I
IL
I
A7RI
3300
\lit
"
A3(6)
+38V
--
-
I
5.
ON-OFF
.140V
~
FRONT PANEL LOCATION.
I PUSH
A3(8)
+175V
~~-
~
FI
.25A
H
A3{l3)
+Z7OV
I
I
C':-:::J INDICATES REAR PANEL LOCATION.
P,
A3(t5)
r;
CR'
6.2V ,.
+-_
.....~'~9~2.~,
AISIO
7I
l-----l-_ A3(10)
A7CR8
7R7
00
, - - _ 4 - - - - - - ' ' - A3(12}
'-:::
_
1&
...
C6A
t
1200
•
C68
1200
A7R8
...-
CR'
O~
A7CI*
~IOOPF
A7 POWER SUPPLY ASSEMBLY
-&
®
rC>------------""------:-
I
AISIO
at
6.0VAC
COPYRIGHT 1963 BY
HEWLETT-PACKARD
.10(:-0-0111&
2
\!!I
1
Lo------------="-----:..... AISID 9!.2
Figure 5-9.
01556-3
Power Supply Schematic
5-11/5-12
y
y
T
TEST CONDITIONS:
FUNCTION: +OCV
RANGE:
.015 V
INPUT:
+0.5 V
1
Waveforms observed on
'Ii Model 175A w/Ifl Model
1752A aod 1780A Plug-ins
and 1000lA Voltage Divider Probe using circuit
ground
as referenced.
0.13 v
MODULATOR
OUTPUT
1\
T
1
lIi'I
1\
PLATE
A3VlA
2v
II
T
1/
II
I
I
BASE
Q1
T
I
BASE
Q2
r-.
T
30v
DEMODULATOR
INPUT
[)-'
1
i/'
T
i-
+--i-
4v
DEMODULATOR
OUTPUT
II
1
I\j
4.0C-1I·011l!
Figure 5-10.
Typical Amplifier Waveforms
vn)
NOTES
1.
A3AIVI AND A3AIV3 ARE LIGHTED SIMULTANEOUSLY
BY A3AIDSI. AND A3AIV2 AND A3AIV4 ARE LIGHTED
BY A3AIDS2.
2.
UNLESS OTHERWISE NOTED:
RESISTANCE IS IN OHMS.
CAPACITANCE IS IN MICROFARADS.
3.
SWITCHES ARE SHOWN IN FULL CCW POSITIONS.
4.
DC VOLTAGES SHOWN ARE TYPICAL UNDER THE
FOLLOWING CONDITIONS:
FUNCTION:
+ncv
RANGE: 1. 5 V
INPUT: +1. 5 V
5.
INDICATES AN ASSEMBLY.
ALL COMPONENTS LOCATED ON AN ASSEMBLY ARE
PREFIXED BY THE ASSEMBLY DESIGNATION (e. g.•
R3 ON ASSEMBLY A7 BECOMES A7R3.)
6.
-
7.
-----------INDICATESDC FEEDBACK.
8.
plo =
9.
I
-
-
-
-
-
-INDICATES SUBASSEMBLY.
PART OF.
IINDICATES FRONT PANEL LOCATION.
~ __ :::;INDICATES REAR PANEL LOCATION.
INDICATES PANEL ADJUST.
INDICATES SCREWDRIVER ADJUST.
11.
±
m
=
CABINET GROUND.
= CffiCUIT GROUND (FLOATING).
12.
~ DENOTES WffiE COLOR USING STANDARD COLOR
CODE. (e. g. 9 = WffiTE. 3 = ORANGE. 5 = GREEN.)
13.
= OPTIMUM VALUE SELECTED AT FACTORY.
AVERAGE VALUE SHOWN.
14.
VOLTAGE IS DEPENDENT ON LOAD INTRODUCED
BY EXTERNAL VOLTMETER.
*
*
15....... VOLTAGE VARIES ACCORDING TO INDIVIDUAL
TUBE.
16.• ~ PIN 8 IS REFERENCE. VOLTAGE VARIES ACCORDING TO INDIVIDUAL TUBE.
Model 410C
+140V
PIC AMPLIFIER
ASSEMBLY
r - - - :.;;....---=..:.=.:.=.:
I
<I'
I
-.-
A3A2 NEON SUBASSEMBLY
r------~;;;-I
~~~
FREO
:
n ce>
j
~
=<*I
A3RI
A3R2
6801<
1.8M
_-.: £±-= Jf:0
052*
A3AI PIO PHOTOCELL
I
r "'~.
- -ljJ
+15114".1
F '-
t,15M'I.
A'C' +:
0047",
A3Cl
1
.1
~9,~
L()
'(
+6V
X
A3C4
.01
A3C6
AMPL
rloo
~A3Ctl
~
'~~
A3R7
}
10301
1'100
m
AMPL.
~')+26V
'0)' ' . :.,...~......_....,..-.(H....
r
-.1(W-
I \:J
I '
I
V2·
(t'\ I 83<,
I
."~ I•• OP'
I- - - - ~f - . J
+26111\......
ili
mlA
A3:~~
OV
50"
A3~~~
103
",v
~i~9
3
~~:19
,.
,(,.
.15MV
R7
R9
151<
25.51<
105UA
0015V
l:SUA
RXIOO
.15'1
o
o
.511410
RXIOOI(
o
X
A6 CALIBRATION
"V
'"A
RXIOM
...
I
1
A3CI4
.0'
I
~OJ
ell
1
(
l
"I-l<
A3R25
2200
,'*>-
__
-9V
:
+210M\I
PIO AISIC(F)
A6RI
1000
PlO A2S1E(Fj
PIO A2StA(R)
PIO AISIO(R)
P/O AISIC(R)
'A
P/O AISIC(R)
AIRIO
'50
o
o
o
o
o
o
o
o
A6R4
~W"-~~-_--:';;';;°_7,OJ>---l--:~,,9.='''-_o
A6R6
360
"'-N.-",,---;w;..~
o
o
~
I
9)>---==--00
I
I
•...w_-"''-------4 '" ~
"
I
o
-O~
I
~....,"---''''-----'~'yO~ II )----4 ~
o
A2R31
60
o
A2R32
'0
o
'0
o
:SOMA
50011
o
o
150NA
o
o
'SOO""
,
,
A3CI3
,
, ,,)---"":.'''--....------+'
<
I
J2
"'
A2R33
150'1
A3V1B
+4ooMV
'OV
15MA
-106~.= 8
ASSEMBLY
A6R8
RXI'"
---
1
o
1.5MA
BIAS
7-
_ _ L_
A6R3 Oo!lV AOJ
300
150UA
RXIOI<
1.5'1
'V
lJ1,~_-.J
A2R30
o
_'V
I
L_~~!.."~:' __ J
.:
207M
L------J------------l.---_7
'~-----
P/O A2SIE(R)
'UA
RXIO
.0511
:SOUA
RXII(
!(f"\
~
A3R24
i
N"--./
,.--------.....
I DC AMPLIFIER :
6 +l60V
'0'
'00
- - ----,',--- -
2841<
CATHODE
FOLLOWER
0V.* ;(,.W
11
if ~'"
A]RlO
A3R3
••
rBASSEMB~Y.-l ~
A3R21
,
A;~I
A3CI6
J; 1300PF
A3AI P/O
PHOTOCELL
0' .22
C~, I
I
.
\
A3R26
1000
A]RIS
'8K
A3C8
AMPfpLe r.3i"
1U~~?-tLl:'+::'10~V:""'·"I;-'---~+';:':;'V:-\HI.
2
r---_--+-~0--<,[
-911
41.
... b-
A3RI4
3000
L--
~
+611
A3RI2
!l600
A3R8
A3CR2
A3V1
--1
r
I--l',,~~9~~.;;'.....--,.L
I
,,,
SUBASSEMBLY
FROM
AISIBIR)
~
- - ,}'-----
A3R9
C1*
L_~=-
GDK
+17!lV
-@--II
Rt*
270.. . --<!S f-----l...J....,::=--~'&~'~-4
~
I
I
+38V
1-
A3
Section V
~
~'~""
IA;"ci~
A6R20
'00
DC OUTPUT
AOJ
A6CRI
A6RI6
8200
··~~l
91O
6
1
J
COPYRIGHT 1963 BY
HEWLETT-PACKARD CONPIl.NY
Figure 5-11. Amplifier Schematic
01556-4
5-13/5-14
Model 410C
Section V
Figures 5-12 and 5-13
.... ..
.1' - • ....
~
.
_
--...
ItOHA-e_
Figure 5-12. Model 1l036A AC Probe (Exploded View)
A.
MODEL 1l0!6A AC PROBE ASSEMBLY
r------------------~
A PI
AaCI
I
INPUT
A8RI
1 2600PF
:
1
I
~}.v,
"M
• A8C2
2>0
1
1
1L____________
,......
,i' I,
' ,
,,i I,
I
I(300V
AC PROBE )1
MAX)
I
JI
I '
... T>-+-TO
,
,
,,,
AISIA RUO)
1
1 I
I :
.
,,
,
R>-+-TO AISIO Flatl
I
,
5)--'-TO
AISIO FUO,)
______ 1
IOOTD
• 10(- . . . . . .
GItOONDIHG JU""'[1t
I . Uo.kM ottwrwlooe opeclfled, rftlMa.c. ill .....
Capodta.c. ill .krobra~.
.. •
....1.... 01 AIC2 lKl.... p........ d capadt,.
S. _ _ _ IllIItIcot. . . . ._ _1,. All
.....
'-ted ..
,.~ prd.. eel II)' Ulo . . . . ...tII,
dN'C-Uooo{•.•. ItI . . .ae...,AI _ _ AlIl1).
e., .........
Figure 5-13.
5-14
~
Model 1l036A AC Probe SChematic
01556-3
~nJ .eo .:~:~~~m."
"00' W
AISIA
AISIB
AISle
I
,
, CAPACIT~"C~
• .J,. • ~TH CROO~'D: J,
AISIO
P!O. l'A1l7 OF.
l:< MICROFARADS AND RESL'TA:<CE IK OHMS.
UNLt:SS 011lERW1SE SP~C!l'l~D.
...
•
•
• rg
• ..
•
•
••
0
•
VIEWEO FROM
FRONT OF
INSTRUMENT
•
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VALUE
VALUE S ov,N
,
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AISI
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".
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•
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RUSS,
TI(21
A6RI7(PIN 31
A3RI (PIN I)
I
AV~RAG~
LOCATIO~
VIEWEO fROM
FRONT OF
INSTRUMENT
RANGE
I~O"A
RXIOK
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r:::::::::JI"DlCATES mONT PANEL LOCATIO~
""
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S~l ~CTED
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RXIOO
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0> INDlCAT>:s seKEW_
PAKEL ADJUST,
INJATES WIRE COlOR USIKG STANDARD COLOR
COOE
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. ClRClnT oo''''0N
mUvEll ADJUH
,
AIRI
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•
,
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FUNCTION
0
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,~
A71A>1
AIR7
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AIR2
2.32M
COARSE
AC ZERo
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AIR6
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INSTRUMENT
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• •• • •
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VIEWED FROM
fRONT OF
INSTRUMENT
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l~-~~-~~-i=~'~'~~==~~=====~==~';jt:
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W
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COPYRIGHT IgS3 BY HEWLETT-PACKARD COMPANY
Section V
Model4l0C
~a
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AyES WII!~ COLOR V .."" STANDAR!) COWR
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?~ ~_.V"'LU£
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.
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01556-4
RANGE and FUNCTION Switching
(Pictorial)
5-15
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@.
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• @
@•
@.
,,@
@.
@'
.@
@.
@ "
" @
@.
@.
8'
,
~:
•0
-
@
~
~
\
[J~
0"000°"
TYPlC4I. .... 1'ER as WWl'D
, _ flilONT OF lfIISTRtJMEHf
t
.
ASIIl
0'
@•
a2RI
~
.@
4""'-1'"
@.
@.
@.
~
0""00
".qr:::~
• •
, ,,
~
"'- ,,@
alR3
,,'tlil:! ,J
@.
0'
•
~,
,I
@•
"l:
"'~
IAC¢1lO1
• , , ,
'" '" '" '"
1/
f.
0~
@.
1;-'00
" ,
~
I.,
,OCv
@® 'OCA~
.,~
a3R:
AISI
I
.
•@
•@
@
@
,
.2S'''''''
.'S'4r"!
•
I 611
.<51/>/'"
,
'
....... 0
@oL@oL-
@
._.
k""'"
--..,
UIS)
-",
,
'-!llQF/
".,
@
~~ .. >
.90>
1"":M~'i~
/J'&,
-:t&.
.,,,
@
I} .'.~
~~.
® if:'/'
(!)
=J
;*~
!O•
()
,• ,,
@
@
II
@
\
, , ,,
'" '"
......... 5QO.<A. @
=
:=
@
@.
8'
figuN! 5-15. Input RAKGE and
Schematic
5-16
ru~cnON
Switching
01556-4
Model 410C
Sectlon VI
Paragraphs 6-1 to 6-7
SECTION
VI
REPLACEABLE
6-1.
INTRODUCTION.
PARTS
6-3. Replaceable hardware parts, not listed In Table
6-1 or 6-2, are listed in Table 6-3 in
alphabetical
order of description.
6-2. Thts sectlon contains inlormation for ordering
replacement pam. Table 6-1 lists parts tn alphanumerical order of their reference designators and
indicates the description and19 stock number of each
part, together with any applicable notes. Table 6-2
lisls parts in alpha-numerical order of their 19 stock
number and provides the following tnlormatlon on
each part:
6-".
ORDERING INFORMATION.
6-5. To obtain replacement parts, address order or
inquiry to your local Hewlett-Packard Field Office
(see lists at rear of this manual for addresses). Identify parts by their Hewlett-Packard stock numbers.
6-6. NON-LISTED PARTS.
a. Description of the part (see Ust of abbreviations
below).
6-7. To obtain a part that is not listed, Include:
b. Typical manufacturer of the part in a five-digit
code{seellstof manufacturers In Appendix).
a. Instrument model number.
b. Instrument serial number.
c. Manufacturer's part number.
c. Description of the part.
d. Total quantity used In the instrument (TQ column).
d.
Function and location of the part.
REFERENCE DESIGNATORS
A
B
C
CR
DL
OS
E
.. U8embly
~ motor
.. capacitor
F
FL
,
• fuse
• filler
.~
K
.. delay line
.. deYlce $ilnalinc{1llll1p)
.. mise electronic part
L
.. relllJ
.. inductOr
.. meter
~ mech.llrtlcal part
...
M
MP
P
Q
.. jllek
R
,
RT
T
~
plUC
• tnnsiBIor
.. nslSlor
• tbermiBIor
~ ....itch
.. Ir:o.nsrormer
vacuum lube. neon
bulb, photoeell. elc.
.. cllbllt
~
V
W
X
XF
XOS
Z
--...
.. fUs.:'holder
~ l:o.mpholder
~ nel....ork
ABBREvtATIONS
.. bandpass
.. backward wave
oscillator
,
..
..
..
..
'.w ..
camp"
..
..
'"
'w.
.",
'''"
'"
""
E>A
carbon
ceramic
cabinet mOlint only
coefficient
common
composition
connection
catllode-ray tube
• deposited
~
01556·3
1\Ibe. or tran.istors
meellnll EIe<:ll"OIlic
Inet.lSlries' Associ:o.·
lion standards will
normally re5llh in
instrumltnt operahng
within specifications;
tubes and tra,naistorll
sel«ted for best
performance .... i11 be
lupplitd If ordered
by 9 S1oc:k numbers.
,
'"
G,
,,,'
N,
~
farads
.. filled
.. germanium
w"
wF
Ne
N.
NO
NPO
.. grOlind fed)
.. henries
• mercury
""
• IDQO,Intlng
.. mylar
--
.. normall)' clo6ed
" normally open
~ neilatlve poslUve
>:erO (zero tempature cooHlclenl)
• IIQI scpsralcly
replaceable
,...-,
ro<
'mO
"sect
.,"si!
"
,.,''''
,.,
TlO
Impg .. impregnated
Ined ~ Incandescenl
.. InSlllation fed)
"0
K
• Idlo .. 1000
".
.. linear laper
.. 1000arllhmic taper
lin
m
M
w.
.....1111 .. 10- 3
~
bp
...
elect .. electrolytic
1t11C:ap. encapsulated
_
.. anlpl!res
.
0
.. milll&lllper_'V
~ micro. 10
minat ~ miniature
~ metal IiIm on gLass
" maMacturer
"
"""
"",
"""
,
"
.'"
pi\'
"'"
""F
""
~
~
order by dI!scription
-,.ok
.. prinled circuit
.....,
• picofarads ..
10-12 farads
.. peak 10 pltU
.. pit"" Inverse
\'ollllge
~ pMition ($)
.. polystyrene
.. potentiometer
.. rectifier
" rotary
" root-mean-square
~ rack mOUIll only
slow-blow
Selenium
~ secUon(s)
~ silicon
.. silver
~ sllde
~
~
~
2
trim
.u
~
Ume delay
tltanlum dlolllde
.. tOilille
~ tolerance
~ trimmer
.. traveling wne tube
~
variable
.... ith
./
~
W
.. WailS
.
~
./
.. wlrewound
......ilhoul
~
optimum vallie
.... Ieeled at factory,
Il\'ence value
lhowo (p:o." may
be omilled)
'-1
Section VI
]l,lodel 410C
Table 6 -I
HEFE[tE"CE
DESIGI'ATOR
-hpPARr 1'0,
A>
410C-1913
I
I
0687-5661
2100_0389
2
0687 -1531
I
RIO
0727-0479
I
51
3100-0383
I
R'
R7
I
R8, R9
A2
41OC-19A
RI
R2
R3
R'
R'
0728-0004
0727-0955
0728-0004
0733-0018
~ !.f.
2
R'
R7
0687-1031
0727_0478
I
I
RIO
RIl
0730-0176
0727-0459
I
Rl2
RI3
0727-0458
0727-0457
0727-0456
-
I
I
R8. R9
~~:
•
I
I
I
I
0727-0451
, RI7
· R21
0727-04$4
0727-0453
0727-0452
0727-0450
0727 -0449
I
I
I
I
I
· R22
.. R23
· [t24
, 1125
H26
0727·0448
0727-0446
0727-0445
410C-261l
410C-26A
2
I
I
R34'
0727-0701
0727-0031
0727-0448
0727-0948
0687-1011
Sl
3100-0382
I
-
·R19
t- .R20
.
I
I
I
I
H27 Ihl"lI R29
R30
RJI
R32
R33
A3
A'
VI thru
V.
6-2
I
I
MFR.
MFR. PART NO.
Switch Assembly: Selec10r
-hp-
R: IxdC11m 5f1.tl%1/2w
R: IxdC 11m 2.32 MfIoll%0.5W
Not assigned
R: fxd comp 56 Mfl .tl0% 1/2 W
R: var _ lin 10 kfl ol 10$ 5 W
94459
94459
evs
eVF
01121
-hp-
EB5661
R: fxd comp 15 kfl ol 10% 1{2 W
Not assigned
R: fxd C flm 250 11 .t 1% 1/2 W
01121
EBl531
94459
eVF
Switch: rotary 4-section 6-position
(FUKCTION)
7685'
"""
Switch Assembly:
-hp-
.
",.
eVF
eVF
eVF
R: bdCflmlQ.tl$1/2W
R: 1xd C flm 10.5 Q .tl% 1{2 W
R: fxd C flm 1 fI..tl% 1{2 W
R: 1x~ 89 MQ oll%2 W
Not assigned
94459
94459
94459
03888
R: 1xd comp 10 I<Q ol 10% 1/2 W
R: 1xd Cflm 2.21 MQ oll$l/2 W
Not assigned
R: 1xd6MU-,,0.5%lW
R: fxdCfim2MUolO.5%lW
01121
94459
94459
01295
eve
fltd C Om 700 kU .to. 5% 1/2 W
94459
94459
94459
94459
94459
eVF
eVF
eVF
eVF
eVF
fxd C Um 700 Q olO. 5% 1/2 W
fxd C Urn 200 fI olO. 5% 1/2 W
R- fxd C"flm 70 fI oll% 1/2 W
94459
94459
94459
94459
94459
eVF
eVF
eVF
eVF
eVF
fxd C Urn 20 fI.1l% 1/2 W
fxd C flm 7 fl .11% 1/2 W
fxd C flm 2 Q .tl% 1/2 W
fxdO.7Q
fxd 0.3 Q
94459
94459
94459
-hll-hll-
eVF
eV5
eV5
94459
01295
94459
94459
01121
eVF
R
R- fltd C Um 200 kU oll$l/2W
R. fltd C flm 70 kQ olO. 5$1/2 w
R. fxd C flm 20 kfl .1<0. 5% 1/2 W
m lOOOO.1O.5%1/2w
IU6
RI8
DESCRIPTION
TQ
0727-0004
0727 -0480
R'
R2
R3.
R'
R'
Replaceable p',rts
R- fxd C (1m 6000 U .to. 5% 1/2 W
R- fxd C rim 2000 0 .to. 5% 1{2 W
no
no
R.
R
R
R.
R•
Not assigned
R: fxdC flm
R: fxd C flm
R: fxd C flm
R. f:xd C flm
R. fxd comp
845ll.l<l%.l/2W
60 fl.1l% 1/2 W
20 fI .11% 1/2 W
10 fl.1l% 1/2 W
100 n ilO% 1/2 W
HV2000
EBI031
eVF
CDIR
OCl/2PR
eVF
eVF
E81011
Switch: rotary 5-sectlon 11 -position
(RANGE)
410C-65A
Assembly: Amplifier
-hp-
1990-0020
Assembly: Chopper 810ck
-hp-
Nol separately replaceable, part of Chopper
Assembly (1990-0020)
01556-5
Model410C
Section VI
Table 6-1
REFERENCE
DESIGNATOR
-hpPART NO.
TQ
Replaceable
Parl~
(Conl'd)
DESCRlPTION
MFR.
MFR. PART NO
A3 (Cont'd)
Assembly: "'mp
1990-0207
A2
CI
Not sclJlralely replaceable, pari of Lamp
Assembly (199(1-O207)
OSI, OS2
Nol sclJll"lllely replaceable, part of Lamp
Assembly (1990-0207)
RI, R2
Not separately replaceable, part of Lamp
Assembly (1990-0207)
CI
C,
C3
0160-2641
0160-3116
I
I
C<
0160..()161
014(l..()208
I
I
0160·2128
I
0160-0039
0160-3366
,I
C5
C'
C7
C'
C9
CIO
C: fxd poly 0.1 $IF J, 10% 50 "dew
C: f:xdpolyO.047JlFJ,10'f,50vdcw
Not assigned
C; f:xd my 0.01 $IF 200 vdcw
C: fxd mica 680 pF 0105% 300 vdew
C: fxdmyO.33JlF±20%200vdcw
Not assigned
C: fxd Al elecl 100 $IF 12 "dew
C; fxd my 0.22 $IF 010 20$ 200 vdew
Not assigned
-hp-
'6289
56289
56289
00853
72354
56289
72354
PI36072
P136049
192PI0392
"""
F307C33-tM
032697
F307C224M
72982
84411
3ODI07G05OOH2
F307C224M
845-X5V-5032
HEW-4
I
C: fxd AI elect 100 j.lF 50 .. dew
C: fxdmy 0.22 $IF 01020%200 vdew
C: b::d cer 0.05 j.lF 100 .dew
C: fxd my 1 j.lF ± 5% 200 "dew
Not assigned
C: fxd mica 1300 pF ± 5% 500 vdcw
14655
RCM15EI0IK
1901..()156
I
Diode: 51 50 mA
03877
5G3288
1850.(1013
1850-0040
'-I
86684
04713
CP2366
5A591
I
01121
01121
-hp·
£86841
EB1851
R3
0687-6841
0687-1851
0811..()998
R'
R5
2loo-O~"
71590
Series 5 Type 70-1
01121
01121
01121
£B5661
£84731
E84701
07115
07115
07115
07115
C20
C20
C20
C20
R: fxd met lim 18 kG ±2% 1/2 W
R lxd met lim 30 kU J,2% 1/2 W
R; lxd camp 1000 Q J, 10% 1/2 W
R: var ww lin 10 kl1 01020% 1 W
Not assigned
07115
07115
01121
79727
C20
C20
R: fxd2.7MGJ,10%1/2W
R: lxd camp 2. 2 kl1 J, 10% 1/2 W
R: lxd comp 1000 U ± 10% 1/2 W
Not assigned
R: var complln2.5MO t20'f, 1/4 W
01121
01121
01121
£B2751
£B2221
EBI021
7159<>
Series 5 Type 70-1
C11
C12
C13
C14
C15
C16
0180-1819
0160·3366
0150-0098
0170-0018
I
0140..()154
CRI, CR2
<>1_
Q'
RI
R2
R6
.R7
R8
R9
RIO,
R12
R13
R14
R15
R16,
0687-5661
0687-4731
0667.4701
I
I
I
0
I
I
I
R11
0757-0164
0757-0168
0757_0163
0757·0165
I
2
I
I
R17
R18
R19
R20
R21
0757-0091
0757-0166
0667_1021
2100-0396
I
3
I
R22, R23
R2'
R25
R28
0687_2751
0687.2221
0687.1021
I
I
2100.(1413
I
R27 thru R29
R30
01556-5
~TR: Ge PNP
TSTR: Ge PNP
R: bd camp 680 kQ J, 10% 1/2 W
R: fl<d camp I. 8 MU 010 10'f, 1/2 W
R: fxd camp 100 G ±1% 1/4 W
NOI assigned
SO"
R. var camp lin'llQ"kn J,30% 1/4 W
Not assigned
R: fxd camp 56 MG J,10% 1/2 W
R: fxd comp 47 kn 010 10% 1/2 W
R: fxd camp 47 G 01010% 1/2 W
Not assigned
R: fxd met flm
R: {xd met Hm
R: lxd met flm
R: fxd met flm
Not assigned
5600 n 010 2% 1/2 W
30 kG J,2% 1/2 W
3000 11 010 2% 1/2 W
13 kG J,2% 1/2 W
56289
72354
E81021
£870PA8
6-3
~lodel
Section VI
,
Rcpla cable
p',rlS (Conl'd)
T·,hl" 6 - 1
REFERENCE
DESIGNATOR
-hpPART NO.
4IOC
,~
~IFn.
DESCRIPTION
TQ
IIIFR PART NO,
AS (Coot'd)
RJI
2100-0~
I
n· var w.... lin 20 11 ol 10% I W
-hll-
VI
1932.oOW
I
Tube: electron 12AT'l dual triode
80131
A4,
Not assigned
A~
A6
410C-651l
CRI
1901-0025
RI
0727-0751
R2
I
,
R3
R'
R'
2100-0394
0727-0747
2100-0394
6
2
R6
R'
R'
0728-0011
2100-0394
0728-0010
I
RI<
2100.0394
I
R9 thro RI3
R>5
""
R"
RJ8
R20
" CI'
CH(j
cn'
CftS
ne n2
n3
n.
R5. n,
n'
no
n>o
03C12
R: bed C flm 1000 n oll'J. 1/2 w
Not assigm"d
n· v:ar _ lin 300 fI ±20'l. I W
It: £XdC (lm 750 n oll% 1/2 W
R: var _ lin 300 9 ol20% I W
944$9
CVF
11236
94459
11236
Series 110
R, Dtd C flm 360 n oll% 1/2 W
n· v:arwwlin 300 fI ol20'l1 W
94459
11236
944!)9
Serles 110
11236
Series 110
C20
CVF
R: !xd C flrn 220 n ±1% 1/2 W
Not assigned
R: V3r _ lin 300 Po ol20'l. I W
2100-0395
0127-0475
,•
R: v:ar camp lin 300 0 ol20% 1/4 W
It: (Xd C 970 fI olO. S'il1/2 W
944!)9
Assembly: PO'Il'er Supply
-hp-
410C-6SC
0140.0041
,
,,
CVS
Series 110
Series 5 Type 70_1
CD1/2MR
Diode: breakdown 36.5 V ol 10% O. 4 W
Diode: breakdown 9.09 V ollO%SOOmW
DI<X!e: breakdown 6.19 V ol 5% O. 4 W
04713
59875
04713
SZl0939-343
PS18256A
SZl0939-122
07115
07115
07115
C20
07115
C20
07115
C20
07115
C20
Not assigned
07(;4 -0003
0758-0018
0784-0026
2
I
I
R: (xd met flm 3300 P. ol 5% 2 W
R: lxd met flm 15 kn ol 5% 1/2 w
Il: fxd met flm 13 kn ol 5% 2 w
Not assigned
UP
I
"
0758-00.0
I
0758 -0083
I
.
I
C
7
.
'g:liii
R: lxdmcll1m~nol5%1/2WS~D--4
Not assigned
n· lxd met 11m 68 P. ol 5% 1/2 w
Assembly: AC Probe (_hp_ M<X!el11036A,
complete)
,
CVF
RCM15EIOlJ
I
1251-0209
moo
CVF
Serles 110
04062
C: fled mica 100 pI' ol 5% 500 vdc....
1902-0026
1902-0567
1902-0049
C2
6-4
93332
07115
94459
11236
CI
PI
Diode: 5i 50 rnA
0727-0866
2100-0394
1l036A
A'
-hp-
Nol assigned
R: !xd met rim 8200 n ol 5';\ 1/2 W
R: !xd C rim 180 n ±1';\ 1/2 W
R: v:ar ww lin 300 fI ol20'li 1 W
Not assigned
CRI thru
cn'
Assembly: Calibration
••
07~.oG48
RJ8
R"
12AT7
C42S
C425
_hp_
Not SCf'lrately replaceable. f'lrt of AC Probe
(l1036A)
Not SCf'lI":lteiy replaceilble, f'lrt of AC Probe
(1l036A)
Plug: telephone 3 conductor
82389
2P-1297
01556-5
Model 410C
Section VI
Table 6-1
REFERENCE
DESIGNATOR
-hpPART NO.
Replaceable Parts (Cont'd)
TQ
MFR.
DESCRIPTION
MFH. PART NO.
A8 (Cont'd)
Not separately replaceable, part of AC Probe
(11036A)
R1
V1
00410-87901
C3
0170-0021
0170-0022
0150-0023
C5
0180-0025
C6
0180-0153
CRt, CR2
CRJ, CR4
1901-0036
1901-0049
OJ
C2
e-
Z ,40- 0
Tube: electron diode
-hp-
C: txd my 4700 pF ± 10'f, 400 vdew
C: txd my O.II!F ±10'l.600 vdcw
c: txd cer 2000 pF ",20'f, 1000 vdcw
Not assigned
c: txdAlelect4x20/IF+5O'f,-10'l.
450 vdcw
c: txd Al elect 2x 1200 /IF ... 100% 410%
84411
59875
56289
62OSJ0047
HEW417
19C203A
006"
TypePLI
006"
454039
2<l_
404-
I
1
Diode: Si300mA
Diode: Si:iOO mA
01841
86684
obd
1
Light indicator: Alit neon (p/o S3)
87034
AIC
34934
051
1"tSQ,_~
F1
2110-0018
1
Fuse: cartridge slow-blow O. 25 A 125 V
71400
MDLI/4
JI
1251-0200
I
82389
3J-1291
J3
1251-0148
I
Jack: telelbone 3 conductor
Assembly: DC AMPLIFIER OUTPUT (see
MISCELLANEOUS for Part Nos.
Connecfur: power cord receptacle
82389
AC3G
M1
1120-0317
I
Meter: 0 -1 rnA
-hp-
Q'
1850-0098
TSTR: Ge PNP
83298
8 41493
R'
0727-0274
0758-0086
2100-0415
R: bdC Um 1 MO ",1% 1/2W
R: b:d met Hrn 100 0 ",5% 1/4 W
R: varwwlin250:l:10%2W
Not assigned
R: fxd comp,.,ill'"KO '" 10% 1/2 W
94459
07115
08984
CVF
01121
EB6831
91637
91637
11236
91637
DCs1/2
DCS1/2-15
H7
DCS1/2-15
87034
79727
SVV-624-109
G4326 6510
J2
'"R'
R3
3331
R5
0687-66U.
R6
0727-0231
0727-0168
R7
R·
R:
R:
R:
R6
2100-1567
R9
0727-0160
51
52
3101-0100
3101-0033
1
1
33 K
fxd C Om 284 kfl ±O. 5% 1/2 W
fxdCflm15kfl:l:I%1/2W
varwwl0kfl:l:10%2W
fxd C flm 25. 5 kO :1:1% 1/2 W
Switch: SPST pushbutton
Switch: DPDT slide
COO
FFF-l
T1
9100-0174
1
Transformer: power
-hp-
WI
8120_0078
1
Cable: power 3 conductor 7-1/2 ft. long
w/NEMA plug
70903
KH_4147
XQ1
1200 -0044
1
Socket: transistor TO-3
97913
M7(PB)
":.
-
MISCELLANEOUS
/\lew
"l'op t... -
1220-0086
1
Shield: tube
82252
319A-2
1490-0088
1
Clip: ground
71785
422-11-11-095
151040006
1510-0007
1
2
Binding post: black (p/o J2)
Binding post: red (p/o J2)
-hp-hp-
14Q(1-0013
tyl;£1't.e.
Fol!
]I,c,
Pb8E
$0&0-'7/
'i /t?-r.4J!i,Pr
II-IOc. - 2-ID
01556-5
6·5
Section VI
Model410C
Table 6.2
REFERENCE
DESIGNATOR
-hpPART NO.
TQ
DESCRIPTION
11036-42102
11036-42101
412A-B3A
1
1
Boot: AC plug (p/o 1l036A)
Boot: AC probe (p/o 1l036A)
Boot: cable
-hp-hp-hp-
Bracket: connector (used with A3 connector)
Bracket: switch (used .... Ith A6 connector)
Bracket: cover retainer
-hp-hp-hp-
3
Bushing; insulator (used with QI)
Bushing: panel (used with AISI and A2S2)
Bushing: strain reltef
26365
28520
_hp_
410C-IA
1
Chassis: transformer
-hp-
4108-21H
1
Clip: grounding (p/o 1l036A)
-hp-
1251...{}195
1251"'{}213
1
1
Connector: lOplnP.C.
Connector: 15 pin P. C.
02660
HOB-2lP
1
Contact: Diode (p/o 1I036A)
-hp-
3130 -0038
1
Coupler: switch
45255
5000-0703
00410-64102
1
1
Cover: side
Cover: top (requires 2 brackets
00410-01202)
Coyer-:· bottom
-hp_hp_
-hp-
Foot assembly
-hp_
Frame: side
_hp_
410C-12A
41OC-12B
00410-01202
1200-0081
1410-0091
0400-0019
•
soeo-o714
SOIO..{J721
5060...{}703
3
1
1
,
,,
,
,
1
_hp_
1
Holder: h.lse
0340-0086
0340-0091
1
1
953,.
-hp-
1400-0084
1
MFR.
Hinge (used with tilt stand)
5040..{J100
,
Ground lead assembly (p/o 1I036A)
410B-21J
6-6
Replaceable Hardware
Insulator:
Insulator:
Insulator:
Insulator:
binding post double
binding post triple
capacitor (used with CI-C2)
ceramic standoU
MFR. PART NO.
974 Special
5B-437-4
143-010-09 (109)
SD-6ISW (125)
10X20Xl
75915
342014
-hp-hp56131
115'0
obd
l~O..{JOOI
,
0340--0001
1
0310..{J1l2
0370-0113
0370-0114
1
1
1
0360-0016
0360-0001
0360..{J042
1
4
,
Lug: solder lock H
Lug; SOlder flO
Lug: solder 900
2260--0001
2420--0001
2820--0001
2950--0006
2950..{JOQI
2950..{J037
2950-0038
0590-0039
0590..{J052
4
,•
Nut:
Nut:
Nut:
Nut:
Nut:
Nut:
Nut:
Nut:
Nut:
410C-2A
410C-2C
1
1
Panel: front
Panel: re"
-hp-hp-
41OC-41A
1200-0043
1
1
Plate: Insulator (used with AISI and A2S2)
Plate: Insulator (usod with QI)
-hp'11785
294457
1251..{J209
1
Plug: telephone (p/o 11036A)
82388
2P_1297
410B-21C
4108-210
1
1
Probe: contact assembly
Probe head
-hp-
•3
3
3
1
1
K_
K,ob
1U>ob
black bar concentric
black bar w/arrow
red w/arrow
hex 4-40" 1/4 In.
hex 6-32 x 5/16 in. w/lock
hex 10-32 x 3/8 in.
hex 1/4-32 x 3/8 in.
hex 3/8-32 x 1/2 In.
hex 1/2-16x 11/16 in.
hex 1/2-24 x 11/16 tn.
speed 6-32
speed 6-32
-hp-hp-hp18452
78189
79963
-hp_
83385
73743
73734
73143
15915
15915
18553
78553
718
2501-10-00
obd
obd
obd
9000
obd
obd
903-12
C6800-632-1
C8020_632_4
-hp_
4108-21F
1
Ring: retainer (p/o 11036A)
-hp·
2200--0006
2200-0014
2370--0001
2
2
Scr("W: machine 4-40 x 3/8 tn. RH
Screw: machine 4-40 x 9{16 In. RH
Screw: machine 6-32" 1/4 In. RH
80120
80120
80120
20
XP
obd
obd
obd
01556·5
Model 410C
Section VI
.
Table 6 2
REFERENCE
DESIGNATOR
-hpPART 1':0.
TQ
2390~007
•
DESCRIPTION
MfK.
8
2
Screw: machine 6-32 x 5/16 In. BH w/lock
Screw: machine 6_32 x 3/8 In. FH
Screw: machine 6_32 x 1/2 In. FH
83385
80120
80120
I
Sleeve (p/a 1l036A)
_hp_
1460-0087
I
Sprlng: diode contact (p/o 1I036A)
91260
1490-0031
I
Stand: tilt
HOC-66A
2
Support: circuit board (used with A3)
91260
_hp_
410C-2lD
410C-21C
410C-21A
I
I
I
Test lead assembly: CO~I
Test lead assembly: DCA -OHMS
Test lead assembly: DeV (Includes Rl)
-hp-hp-
5020~704
I
Trim: meter
11036_62101
I
Tube: socket and cable assembly
(p/o 11036A)
-hp_hp_
2370-0002
2370-0003
4108-21E
3050-0066
3050-0067
0900-0016
2190-0005
2190-0004
2190-0003
2190-0047
2190--0011
2190-0028
2190--0027
2190-0022
2190-0037
1400-0090
01556-5
Replaceable Hardware (Cont'd)
,
2
I
2
2
2
20
2
2
,
4
2
I
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
Washer:
flat 116
flat 3/8 in. ID
fuse holder
lock 114 external
lock #4 internal
lock #4 split
locI< #6 countersun.l<
lock #10 internal
lock /110 int/ext
lock 1/4 in, internal
lock 3/8 in, ID
lock 1/2 in, internal
Neoprene
MFll
PAin NO.
"'"
"'"
"'"
"'"
"'"
-lIp-
73734
73734
76680
80120
78189
83385
78189
78189
78189
78189
78189
78189
75915
"'"
cO"
622710
cO"
SFl904
cO"
cO"
1910
-4010·18·00
1914
1920
1224-08
901-2
6-7
Mode1410C
Section VI
Table 6-2
Table 6-2.
19
Replaceable Parts (Cont'd)
DESCRIPTION
PART NO.
MFR
MFR PART NO.
TQ
0687-1031
0687-1531
0687-1851
0687-2221
0687-2751
R,
R,
R,
R,
Ixd,
Ixd,
Ixd,
Ixd,
R, fxd,
comp, 10 K -ohms ::1:10%, 1/2 w
comp, 15 K ohms ::1:10%, 1/2 w
compo 1. 8 megohms ::1:10%. 1/2 w
comp, 2.2 K ohms ::1:10%. 1/2 w
2.7 megohms ::1:10%, 1/2 w
01121
01121
01121
01121
01121
E81031
E81531
E81851
E82221
EB27'51
1
1
1
1
1
0687-4701
0687-4731
0687-5661
0687-6831
0687-6841
0727-0004
0727-0031
0727-0168
0727-0180
0727-0231
0721-0274
0727-0445
0727-0446
0727-0448
0727-0449
0727-0450
0727-0451
0127-0452
0727-0453
0727-0454
0727-0455
0727-0456
0727·0457
R,
R,
R,
R'
R,
R,
R,
fxd,
Ixd,
Ixd,
Ixd,
Ixd,
fxd.
Cxd,
R, Cxd.
R, Ixd.
R, Ixd.
R, Cltd,
R, fxd,
R, Cxd,
R, fxd.
R, Cxd.
R, Ixd.
R' Ixd,
R, Cxd,
R, Cxd,
R, Cxd.
R, fxd.
01121
01121
01121
01121
01121
94459
01295
91631
91637
91637
94459
94459
94459
94459
94459
94459
94459
94459
94459
94459
94459
94459
94459
E84701
E64731
E85661
E86831
E86841
eVg
DCl/2PR
DCS1/2-15
DCSI/2-15
DCSI/2
eVF
eVg
eVg
eVF
eVF
eVF
eVF
eVF
eVF
eVF
eVF
eVF
eVF
1
1
R,
R,
comp, 47 Ohms ::1:10%, 1/2 w
COmp, 47 K ohms ::1:10%, 1/2 w
COmp, 56 megohms ::1:10%. 1/2 w
comp, 68 K ohms ::1:10%. 1/2 w
comp, 680 K ohms ::1:10%, 1/2 w
deposit carbon Hm, 5 ohms ::1:1%, 1/2w
carbon f1rn. 60 ohms ::1:1%. :tj2 w
carbon Urn, 15 K ohms ::1:1%. 1/2 w
carbon Hm, 25.5 K ohms ::1:1%. 1/2 w
carbon Hm. 284 K ohms 10. 5'Il. 1/2 w
carbon flm. 1 megohm ::1:1%, 1/2 w
carbon flm. 2 ohms ::1:1%, 1/2 w
carbon f1m. 7 ohms ±1%. 1/2 w
carbon (lrn, 20 ohms ::1:1%. 1/2 w
carbon Hm. 70 ohms ::1:1%. 1/2 w
carbon
200 ohms ::1:0. 5%, 1/2 w
carbon tIm. 1 K ohms ::1:0. 5'Il. 1/2 w
carbon flm. 700 ohms 10. 5%. 1/2 w
carbon !lm, 2 K ohms ::1:0.5%. 1/2 w
carbOn Hm, 6 K ohms ::1:0. 5%. 1/2 w
carbon Hm, 20 K ohms ::1:0.5%. 1/2 w
Ixd, carbon nm, 70 K ohms ::1:0.5%. 1/2 w
Ixd, carbon Hrn, 200 K ohms ::1:1%, 1/2 w
0727-0458
0727-0459
0727-0475
0727-0478
0727-0479
R,
R,
R,
R,
R,
Cltd.
Cxd.
Cxd.
Ixd,
Ixd,
94459
01295
94459
94459
94459
eVF
CDlR
CD1/2MR
eVF
CVF
1
1
1
1
1
0727-0480
0727-0701
0727-0747
0727-0751
0727-0866
R,
R,
Cltd.
b:d,
R, Cxd,
R, fxd.
R, Cltd.
carbon
carbon
carbon
carbon
carbon
Hrn,
Hm,
Hm,
flm,
Hm,
2.32 megohms ::1:1%, O. '5 w
845 ohms ::1:1%, 1/2 w
750 ohms ::1:1%, 1/2 w
1 K ohm ::1:1%. 1/2 w
180 ohms ::1:1%, 1/2 w
94459
94459
94459
94459
94459
eVF
eVF
eVF
eVF
eVF
1
1
0727-0948
0727-09'55
0728-0004
0728-0010
0728-0011
R,
R,
Ixd,
Ixd,
R, fxd,
R, fxd,
R, fltd,
carbon
carbon
carbon
carbon
carbon
Hm,
flm,
flm,
nm,
Hm,
10 ohms ::1:1%. 1/2 w
10.5 ohms ::1:1%, 1/2 w
1 ohm ::1:1%. 1/2 w
220 ohms ::1:1%, 1/2 VI
360 ohms ::1:1%. 1/2 w
94459
94459
94459
94459
94459
eVF
eVF
eVF
eVg
eVF
2
0730-0176
0733-0018
0757-0091
0757-0163
0757-0164
R,
Ixd,
Ixd,
fxd,
fxd,
Cxd,
6 megohms ::1:0. 5%. 1 w
carbon flm. 89 megohms ::1:1%, 2 w
mel Hm, 18 K ohms ::1:2%, 1/2 w
mel flm, 3 K ohms ::1:2%, 1/2 w
mel flm. 5.6 K ohms ::1:2%. 1/2 VI
94459
03888
07115
07115
07115
eve
HV2000
e20
e20
e20
1
1
1
1
1
Ixd,
Ixd,
Ixd,
fltd,
met
met
mel
met
07115
07115
07115
07115
020
1
e20
e20
e20
2
0757-0165
0757-0166
0158-0018
0758-0048
'"R,R,
"'R,
R,
'"R,
am.
carbon Hm, 700 K ohms ::1:0. 5%. 1/2 w
carbon Hm, 2 megohms ::1:0.5%. 1 w
deposit carbon. ·970 ohms ::1:0.5%, 1/2 w
carbon Hrn. 2.21 megohms ::1:1%, 1/2 w
carbon Hm, 250 ohms ::1:1%, 1/2 w
Hm.
Hm.
[1m,
nm,
13 K ohms ::1:2%, 1/2 w
30 K ohms ::1:2%. 1/2 w
15 K ohms ::1:5%. 1/2 w
8.2Kohms::l:5%,1/2w
2
1
1
1
1
1
1
I
1
1
1
2
1
1
I
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
I See inlroduction to this section
6-'
01~56-4
Model 410C
Section VI
Table 6-2
Table 6-2
e
Replaceable Parts (Cont'd)
MFR PART NO.
DESCRIPTION
PART NO.
TQ
07115
07115
07115
07115
C20
C20
C20
C07
I
I
R: fxd. met Hm. 3.3 K ohms :l5%. 2 w
R: fxd, met Hm. 13 K ohms ±5%, 2 w
07115
01115
C42S
C42S
I
I
R: fxd. compo 100 ohms :ll%. 1/4 w
28480
0811-0998
I
0158-0069
0158-0010
0158-0083
0758-0086
R:
R:
R:
R:
0764-0003
0764-0026
0811-0998
fxd,
fxd,
fxd,
,fxd,
met
met
met
met
Hm. I. I K ohm ±stJ., 1/2 w
flm. I. 2 K ohms :l5%. 1/2 w
Hm. 68 ohms :l5%. 1/2 w
lim. 100 ohms :l5%, 1/4 w
I
I
1120-0317
Meter: 0 - 1 rna
28480
1120-0317
I
1200-0044
Socket, transistor: TO - 3
97913
M7 (pe)
I
1251-0148
1251-0200
1251-0209
Connector. power cord receptacle
Jack: telephone. 3 conductor
Plug: telephone. 3 conductor
82389
82389
82389
AC3G
3J-1291
2P-1291
I
1450-0106
Light Indicator: AIC neon (p/o S3)
87034
AIC
I
1850-0013
1850-0040
1850-0098
Transistor: germanium. PNP
Transistor: germanium. PNP
Transistor: germanium. PNP
86684
04713
83298
CP2366
SA591
8-1493
I
I
I
1901-0025
1901-0036
1901-0049
1901-0156
Diode:
Diode:
Diode:
Diode:
50 rna
300 rna
500 rna
50 rna
93332
01841
86684
03877
OOC72
obd'
34934
SG3288
I
I
1902-0026
1902-0049
1902-0561
04713
04713
59875
SZ10939-343
SZ10939-122
PSI8256A
I
Diode: breakdown. junction, 6.19 v ±5%, 0.4 w
1920-0010
Tube electron. EA53. diode
73445
EA53
I
1932-0027
Tube: electron, 12AT7, dual triode
ooon
2AT7
I
1990-0020
Ass'y - chopper block. inCludes:
28480
1990-0020
I
1990-0207
2100-0227
2100-0389
2100-0394
2100-0395
2100-0396
2100-0413
Cl
Rl, 2
DBI, 2
VI thru 4
Lamp ass'Y
R: var, ww. Un taper. 20 ohms ±IQlL. I w
R: var, ww. lin taper. 10 K ohms ±lO%, 5 w
R: \'ar, ww. lin taper. 300 ohms ±20%. 1 w
R: var, compo Un taper. 300 Ohms :l20'l" 1/4 w
R: var, _ , lin taper. 10 K ohms :l20%, 1 w
R: 'Iar, compo lin taper, 2.5 megohms ±2QlL,1/4 w
28480
28480
28480
11236
71590
79727
71590
1990-0207
2100-0227
2100-0389
Series 110
Series 5. Type 70-1
E870PAB
Series 5. Type 70-
1
1
2100-0415
R: var, compo Un taper. 25 ohms ::1:10%. 2 w
08984
2100-0442
2100-1561
2110-0018
R: var, compo Un taper. 40 K ohms ±30%. 1/4 w
R: var, ww, 10 K ohms :l10%, 2 w
Fuse: cartridge, slow-blow, 0.25 amp. 125 v
71590
11236
11400
FFF-1, Term.
X, Y, Z
Series 5.Type 70-1
117
3100-0382
3100-0383
3101-0033
3101-0100
3101-0100
8120-0078
Switch: rotary. 5-section. ll-position
Switch: rotary. 4-section. 6-position
Switch: slide, DPDT
SWitch: SPST. pushbutton, w/pllot light
SWitch: SPST, pushbutton, w/pllot light
Cable. Power: 3 conductor, 7-1/2 fL long,
wiNEMA plug
Transformer: power
76854
76854
79727
9100-0174
si.
si,
sit
sl.;
Diode: breakdown, junction, 36.5 v ±1(JlJ,. 0.4 w
Diode: breakdown, junction, 9.09 v:lIO'l" 1.5 w
MDLl/4
1
1
I
I
1
1
I
6
1
1
1
I
1
1
1
1
87034
70903
obd •
obd •
G-326. 6510
Rev. D
SW-624-109
KH·4147
28480
9100-0174
I
I
I
1
1
, See introduction to this section
6-9
Section VI
Table 6-3
Model410C
Table 6-3. Replaceable Hardware
~
MFR PART NO.
DESCRIPTION
PART NO.
TQ
Binding post, black (p/o J2)
Binding post, red (plo J2)
28480
28480
1510-0006
1510-0007
1
2
Boot, AC plug (p/o 1l036A)
Boot, AC probe (plo 11036A)
28480
28480
11036·42102
11036-42101
1
1
412A-83A
4IOC-I2A
41OC-12B
Boot, cable
Bracket, cOlUlector (used wIth A3 connector)
Bracket, swUch (used wIth A6 connector)
28480
28480
28480
412A-83A
41OC-I2A
41OC-12B
1200-0081
Bushing, tnsulator (used with Ql)
26365
974 Special
2
1410-0091
Bushing, panel (used with AISI and A2S2)
28520
S8-437-4
0400-0019
Bushing, strain relief
28480
0400-0019
,
410C-lA
Chassis, xlmr
28480
410C-IA
1
410B-21H
Clip, grounding (p/o 1l036A)
28480
410B-21H
1
1251-0195
1251-0213
Connector, 10 pin P.C.
Connector, 15 pin P. C.
02660
OOOXX
143-010-09 (l09)
SD-615W (125)
1
1
410B-21P
3130-0038
Contact, Diode (p/o lI036A)
Coupler, switch
28480
45255
410B-21P
IOX20Xl
1
50Q0-0'103
5060-0712
5000-0714
5060-0727
5060-0703
Cover, side
Cover, top
Cover, bottom
Foot Ass'y
Frame, side
28480
28480
28480
28480
28480
5000-0703
5000-0712
5060-0714
5060-0727
5060-0703
1
2
4l0B-21J
Ground Lead Ass'y (PIa 11036A)
28480
410B-21J
1
5040-0700
Hinge (used.wlth tilt stand)
28480
5040-0700
2
1400-0084
034G-0086
0340-0091
1520-0001
0340-0007
Holder, fuse
Insulator, binding post, double
Insulator, bindIng post, t.riple
Insulator, capacitor (used with Cl - C2)
Insulator, ceramIc standoff
75915
28480
28480
56131
11590
342014
0340-0086
0340-0091
1
1
1
2
1
0370-0112
0370-0113
0370-0114
Knob, black bar, concentric
Knob, black bar, wlarrow
Knob, red, wlarrow
28480
28480
28480
0370-0112
0370-0113
0370-0114
1
0360-0016
0360-0007
0360-0042
Lug, solder, lock, 14
Lug, solder, /flO
Lug, solder, 90 0
78452
78189
79963
718
2501-10-00
obd'
1
4
2260-0001
2420-0001
2820-0001
2950-0006
2950-0001
2950-0037
2950-0038
0590-0039
0590-0052
Nut,
Nut,
Nut,
Nut,
Nut,
Nut,
Nut,
Nut,
Nut,
28480
83385
73743
73734
73743
75915
75915
78553
78553
2260-0001
obd'
410C·2A
41OC-2C
41OC-41A
Panel, front
Panel. rear
Plate, insulator (used with AISI and A2S2)
1510-0006
1510-0007
11036·42102
11036-42101
hex, 4-40 x 1/4 In.
hex, 6-32 x 5/16 In., w/lock
hex, 10-32 x 3/8 In.
hC:ll, 1/4-32 x 3/B In.
hex, 3/8-32 x 1/2 In.
hex, 1/2-16 x 11/16 In.
he:ll, 1/2-24 x 11/16 in.
speed, 6-32
speed, 6-32
28480
28480
'28480
XP
obd'
obd'
'9000
obdI
obdI
,
1
1
2
1
1
2
2
1
1
2
4
4
,,
3
903-12
C6800-632-1
C8020-632-4
1
1
4
2
4lOC-2A
4l0C-2C
41OC-4lA
1
1
1
, See introduction to this section
6-10
01556-4
Section VI
Table 6-3
Model 410C
Table 6-3. Replaceable Hardware (Cont'd)
DESCRIPTION
$ PART NO.
Mrn
MFR PART NO.
Plate, Insulator (used with QI)
Plug, telephone (p/o 11036A)
Probe contact ass'y
Probe head
Ring. retainer (p/o 1l036A)
MISCELLANEOUS
Clip: ground.
Screw, machine, 4-40 x 3/8 in. RH
Screw, machine, 4-40 x 9/16 in•. RH
Screw, machine, 6-32 x 1/4 in. FH
Screw, machine, 6-32 x 5/16 in. B8, w/lock
Screw, machine, 6-32 x 3/8 in. FH
Screw, machine, 6-32 x 1/2 in. FH
Shield: lobe
Sleeve (p/o 11036A)
Spring, diode contact (p/o 1l036A)
Stand, tilt
Support, circuit board (used with A3)
Test lead ass'y, COM
Test lead ass'y, DCA-OHMS
Test lead ass'y, DCV (includes Rl)
Trim, meter
Tube, socket and cable ass'y (p/o 11036A)
71785
82389
28460
28480
28480
294457
2P-1297
410B-21C
410B-2lD
410B-21F
71785
80120
80120
80120
83385
80120
80120
82252
28480
91260
91260
28480
28480
28480
28480
28480
28480
422-11-11-095
obd'
obd'
obdf
obd'
obd'
obdf
319A-2
410B-21E
3050-0066
3050-0061
0900-0016
2190-0005
2190-0004
2190-0003
2190-0041
Washer,
Washer,
Washer,
Washer,
Washer,
Washer,
Washer,
flat, f6
nat, 3/8 in. m
fuse holder
lock, 14 mernal
lock, n internal
lock, 14 split
lock, 1& countersunk
73734
73734
76680
80120
78189
83385
78189
-
2190-0011
2190-0028
2190-0027
2190-0022
2190-0037
1400-0090
Washer,
Washer,
Washer,
Washer,
Washer,
Washer,
lock, ItO
lock, ItO
lock, 1/4
lock, 3/8
lock, 1/2
Neoprene
78189
78189
78189
78189
78189
75915
1910
4010-18-00
1914
1920
1224-08
901-2
1200-0043
1251-0209
410B-21C
410B-2lD
410B-21F
1490-0038
2200-0006
2200-0014
2370-0001
2390-0007
2370-0002
2370-0003
1220-0066
410B-21E
1460-0087
1490-0031
410C-66A
4l0C-2lD
41OC-21C
41OC-21A
5020-0704
11036-62101
Internal
lnt/ext
in. internal
In. ID
in. internal
obd.
obd'
41OC-66A
410C-21D
410C-21C
410C-21A
5020-0704
11036-62101
obd'
obdf
622710
SF1904
obd.
obdf
TQ
1
1
1
1
1
1
2
2
2.
•
8
2
1
1
1
1
2
.[
1
1
1
1
2
3
1
2
2
2
3.
2
2
3
•
2
1
, See Introduction to this section
01556-4
6·11
Model 410C
Appendix A
CODE LIST Of MANUfACTURERS
Tu folltnrinc ...- .... rnbtra :ore fnllll U. F.deral 9.lpplr Code for l.UD1faeNr..... C a ~ H.o....,h 84-1
(Name 10 Code) aDd H4.2 (Code to lia....) a:o:t Uarir West "pple_lIU. Tbe <10.1. of reri>lioa and U. 4Ue 01 U.
...pplemenu UHd aweu at lbe _III of . _ p>&e. AlpblJ:>et1ea.l....-. bare be-. artIi.tnrll:J ... ~ 10
."ppller. 1101 appUTIn( iQ U. H4 HaDdbool<.I.
C.....
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c.Il••. C.IoI.
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l,r".i. (I ,wi. Prol"". Wi"' ....
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D.II. S.. ,,,.do<t.. I...
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C•• ' ....I......
C.. _
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rn S...... ,..,,'. AD....1101. Tor" .
I ToI'I'''' c..,.
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rl•.
H•• r.lI__ p"u,o C..... ,
l ••• r",. C.t•.
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1"11
r lill
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lim I... r Pro,.•" .. c•..
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hili..... M .
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III.
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1 SIo••11 ••"" c"p.
"i.l.... r. C•••.
COl,.
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01010 I."
Oilll On
1 l ... O"i,,1 C.,
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11m
10'-1
H1_ 1
K•• fNok lo"I .... I'
O.I.~ AUCUlT 1116
o.rOl nv. Illl
Appendix A
Model 410C
CODE LIST Of MANUFACTURERS (Cont'dl
......
Ti.... A. ['IO.. 1....1"... D,•••!
1'1"
I""
I'ltl
leltl
lIll'
lU]\
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C.....
L'C EI"It.. ,,,
lloell.lll. c..
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l
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IllN f ...l..I ....II.'li ..1 C....
•. C."'I'. Ill.
1lJ1l S"".. I ••,. Uo<lI."" L". ' .....,1N. D.C.
IIlU e.L
0,.1., ..
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.
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1'111 c"....,_..
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1\.il CIOMI f,l. C•.•1 ~ ••" ... 10••
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l
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Appendix A
Model.fIOC
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Model41OC
IJJ MANUAL BACKDATING CHANGES
MODEL 410C
ELECTRONIC VOLTMETER
Manual serial Prefixed: 807-hp- Part No. 00410-90005
This manual backdating sheet makes this manual applicable to earlier Instruments. Instrument-component values that differ from those in the manual,
yet are not listed in tne bcickdating s~. should be replaced using the part
number given in the manual.
Instrument Serial PreHx
Make Manual Changes
Instrument serial Prefix
Make Manual C'h.:I.nges
5SO- and below
1
344-
I thru 6
550-05300 and below
1, 2
339-
1 thru 7
532-
Ithru3
328-
I thru 8
443-
Ithru4
CHANGE 1:
CIIANGE 2:
311Under Table of Replaceable Parts:
Delete: A3Cl -hp- Part No. 0160-2641.
A3C2 -hp- Part No. 0160-3116.
Add: A3CI -hp- Part No. 0170-0030.
A3C2 -hp- Part No. 0170-0077.
I thru 9
Under Table of Replaceable Parts:
Delete: A3Cll: Capacitor: fixed, 100 IJ-f. 25 vdew -hp- Part No. 0180-0094.
Add; A3Cll; Capacitor: fixed, lOO"d, SO \'dew -hp- Part No. 0180-1819.
NOTE
Later Models 410C (SCrlal No. 5SO-<l5301 and abo...e use a 50 \'dcw
capacitor (-hp- Part No. 0180-1819) to ensure that lhe voltage
rating oC the cap:;lcilor is not exceeded. II ill recommended th:ll
earlier models be modified accordingly In case of failure of the
25 ...dew calBcltor.
CIIANGE 3:
Under Table of Replaceable Parts;
Delete: C2: Capacitor: fixed, O. I p.e -hp- Part No. 0170-0022.
Add: C2: Capacitor: fixed, 0.1 IJf -hr- Part No. 0160-0001.
Add: U6: Resistor: fixed, 284 K (1 -hp- Part No. 0727-<1231.
Add: R7; Resistor: fbed, 15 K n -hp- Part No. 0727-<1168.
Add; 1t8: Resistor: variable, 10 K n -hp- Part No. 2100-1S67.
Add: R9: Rellislor: rixed, 25.5 K n -hp- Part No. 0727 -<1180.
--
F4;ur('s 3-1, 3-2, 3-3, 3-7:
Delete:
Figures 4-3, 4-4. 4-5, 4-6:
Delele:
Figure 5-11, AmpUller SChematic:
Delele:
....
..
! 14K
111
15K
lit
25,511
Appendix C
Model41De
Manual Backdating Changes Model410C
CHANGE 3 (Cont'd):
Pa~e
2
Page 5-1. Paragraph 5·11 a:
Short Model41OC DeV probe to CO~1 lead: painter should r('ad ;[('ro. II not.
refer to P20.ragraph 5·33 for adjustment pr()('tdure.
Page 5-8, Paragraph 5-34 c:
AdJusl A3R21 for zero meter denectlon.
Page 5-8, Paragraph 5-34 c:
Switch 10 -DeV. U an)' deflection is obsened, adJuSI A3R21 to rrturu uWll'r
palmer hallway back 10 zero. Cl'Icck zero S('ltl"l: on all ra~es ror buth . DeV
and -DeV. Zero onset shall not ex~eed I j, in any ("ase.
~OTE
Later Models 4l0C (Serial Prt'flx 550 and aoovt') use tht> ZERO Af),IUST ,1Il IIll' 1',':11'
panel for Increased accurac}' for DC ZERO ADJUSTMENT. U Is 1·'...·ommC'lwl,od 111;11
earlier models be modified accordin~I}·. Rerer to
Sen'I('C NOll' ·tlOC-O rllr m"dlIIcatlon Instructions.
CHANGE 4:
Under Table of Replaceable Parts:
Delete: A3R20: Rt'slstor, fixed. I K ohnl;
Part No. 0G!J7·102J.
Add: A3R2Q; Resistor, fixed, 10 K ohms: L P:1 rl No. 00116·1035.
Figure 5·10, Amplifier SChematic:
Change A3R20 from I K ohm to 10 K ohms.
r>OTE
Later Mocleis 410C (5erL'l1 Prefix 0133 and
above) use a I K ohm resistor for A3112Q to
increase the meter zero adjustment (A31121).
It 18 recommended that earlier models be
modified :tc~ordin~ly, In cue of ~ro adJustment problem. Rder to
Servke NOll'
410C-1 for modili~ation instructions.
CHANGE 5:
Under Table or HClllaceablc ParIs:
Delet(': Ql: Transistor, PNP Germanium: 4r Pdrt No. 11150-00911.
Add: QI: Tr.lns(stor, PNP Gcrmanlum:
Part No. 1850·0094.
NOTE
Later Models 410C (SerL'l1 PreUx 433 and
above) use the'~ Part No. 1850·0098 ror Increased rei lability. II III rceOnlmeoclcd
that earlier models be modified accordl"l:I}',
in case of failure of the earlier type transi~or.
Refer to t, Sen'i~e NOll' 4tOC·3 for modification Instrucllons.
CHANGE 6:
Uoclcr Table or Replace:lblc ParIS:
Delete: CR7: Diode, Breakdown Junction, 9 v, I 511,1: 10 1J;lrt Nfl. 1!l02-0:127.
1J;lrt N... 1002·011:17.
Add: A 7CR7: Diode, Breakdown JUllt:'tloo, 9 v, 0.4 w:
Figure 5-8, Power Suppl}' Schematic:
Ch.1nt::e CR7 to A7CR7. This deslt::nates tll:1I tlil" diode 110 IXlrt lOr tl.. · I'"w"r
SUllilil Asscmbly, A7.
NOTE
Later Models 410C (Serial Prdlx 433 ,uwl
above) use the I. 5 watt breakdown dlodl' '"
Part So. 1902·0327) ror Incrt.':Iscd rcliabUll)'. It is recommended that earlier mfldl'I...
he modified a('cordin~ly, In case or f;lilurc or
the O. 4 wall diod('.
CHANGE 7:
Under Table of Replaceahle Partl>:
Delete: 53; SWitch, pu!>hbuttonw pil'Jllwht;
J':lrt "". 3101-fl10l1
Delete: DSI; Lia;ht, lndi~ator. Ale n<ofm:
1".Irt "". 14511·1)111(,.
Delete: R5; Resistor, rlxed. 68 K ',hm ..:
I":,rt ....',. or~7_fi;S:1I.
Model 410C
Appendix C
Manual Backdating Changes Model 410C
CHANGE 7 (Cont'd):
Page 3
53; Switch, p.lshbutton; fi Part No. 3130-0054.
051; Light. indicator, NE-2H neon; 6' Part No. 1450-0048.
Bushing, panel;" Part No. 5020~0883.
Actuator. AC switch; ~ Part No. 5040-0918.
Bracket; AC switch; ~ Part No. 410C-12C.
R5; Resistor, fixed. 33 K ohms;'" Part No. 0687-3331.
Add:
Add:
Add:
Add:
Add:
Add:
NOTE
Later Models 410C (Serial Prefix 344 and
above) use the (;- Pari No. 3101-0100. pushbutton switch w/pUOI light for increased rellabUhy. It Is recommended thai Ihis 1mproved switch-pilot light assembly be used
for replacement, in case of failure 01 the
older type swllch. Refer to ~ Service Note
P-3101-0100 for modlllcaUon InstructiON!.
CHANGE 8:
Under T:lble 01 Replaceable Parts:
Delete: A3R3; Resistor. fixed, 100 ohms;. Part No. 4IOC-26D.
Add: A3R4; Resistor. fixed. 94 ohms;'" Part No. 0727-0470.
Add: A3R6; Resistor, fixed, 6 ohms; ~ Part No. 4IOC-26C.
Figure 5-10. AmpU!ier Sc;hematlc:
Change:
PIN
7
:-------------~~~;-------l
r---J
A3R6
I
I
6Jl.
I
I
:l
TO
A3Cl
I
Pro AMPL. ASSy.
A3
A3R4
94[\
II
I
I
-JI
PIN 4
CHANGE 9:
Under Table of Replaceable Parts:
Delete: AIR1; Resistor. fixed, 15 K ohms; ~ Part No. 0687-1531Add: AIR7; Resistor. fixed. 22 K ohms; fI Part No. 07f)8-0020.
Delete: A2R2; Resistor, fixed, 10.5 ohms; ~ Part No. 0727-0955.
Add: A2R2; Resistor. fixed, 6 megohms; #.j Part No. 0727-0460.
Delete: A2RIO; Resistor, fixed, 6 megohms; '6' Part No. 0730-0176.
Add: A2RI0; Resistor, fixed, 10.8 ohms; ~ Part No. 0728-0005.
FI,,'I.Ire 5-13. RANGE and nJNCTION Switching (Pictorial):
Ch.1nge A lR7 from 15 K ohms to 22 K ohms.
Ch:tnge A2R2 from 10.5 ohms to 6 megohms.
Change A2RI0 from 6 megohms to 10.8 ohms.