ATE-100 RVDT/LVDT Manual
2014-02-16
page 1 of 16
Actuation Test Equipment
ATE-100 CFM56-3 RVDT Manual
Actuation Test Equipment
3393 Eddie Road
Winnebago, IL 61088-8736
Ph# 815.335.1143
Email: DudleyDevi@Aol.Com
February 18, 2015
Rev 1.
Figure 1 ATE-100 19" Rack Mount
ATE-100 RVDT/LVDT Manual
2014-02-16
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TABLE OF CONTENTES
Topic
Calibration Cycle - 3
Overview of Calibration Procedures -3
Calibration Tools – 4
RVDT Module – 5
Feature Identification -5
Controls and Indicators – 6
Datel Meter - 6
MGain - 6
RVDT VAC Pk Primary Excitation SetPoint - 6
Coil Select Primary/Secondary – 6
Primary Resistance Test Selector Switch – 6
Secondary Resistance Test Selector Switch – 6
Secondary Phase Indicator – 6
PLA RVDT Circuit Board Supply – 7
PLA RVDT Calibration - 7
AC Peak Detector Balance Adjustment – 7
Calibrate Primary Meter Indication – 8
Sweep, Measure and Record Calibration of Secondary Circuit – 8
Figures
Cover Picture – ATE-100 19” Rack mount -1
Fig 1 – Signal Breakout block - 4
Fig 2 – ATE-100 RVDT Module Faceplate – 5
Fig 3 – Meter Balance Calibration Test Cable 7
Fig 4 – PC Board Silkscreen Artwork – 9
Fig 5 – Electronic Schematic of RVDT5 PC Board – 10
Table 1 – Parts list from PCB Schematic Capture Tool
ATE-100 RVDT/LVDT Manual
2014-02-16
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Calibration Cycle
Each time the test box is calibrated, note and record the change in the
electrical performance of the circuits. This data will allow determination of
appropriate calibration cycles.
Overview of Calibration Procedures
Start by measuring and recording Ohms from power cord ground prong to the test
kit chassis.
Energize the test kit and measure the +25, +15 and +5 volt power supplies on the
RVDT/LVDT PC Board.
Measure and record AC RMS output excitation to RVDT amplitude adjustment
range, total harmonic distortion (optional) and accuracy of metering circuit at three
points.
Measure and record AC RMS and meter indication for Secondary RVDT signal
voltage at 3 points.
Verify Secondary Phase LEDs change state at 0 deg PLA.
Measure and record Coil Resistance test 1mA current output.
Measure and record the 20M Ohm Insulation Resistance test threshold.
ATE-100 RVDT/LVDT Manual
2014-02-16
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Calibration tools
 Two resistor sets measured at 19.5M and 20M Ohms. Use 1/4W 1% metal
film resistors. Connect them from the connector pin to ground as a go/no-go
determination of the Insulation Resistance test calibration. Adjust Resistance
Threshold trimpot to get Pass LED on at 20M Ohms and Fail LED on at
19.5M Ohms.
 A Small “tweaker” screwdriver to adjust 25 turn trimmer pots.
 A multimeter capable of measuring 1mA, 250VDC and 3 to 8VAC.
 An optional ATEo supplied connector breakout block with BNC connectors
for all Input and Output signals.
Figure 2ATE-100 Signal Breakout
ATE-100 Test Block for input/output signal access for troubleshooting and
calibration.
ATE-100 RVDT/LVDT Manual
2014-02-16
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RVDT Module
Datel Meter
Meter Calibration Trimmer
VAC Pk SetPoint Pot
Meter Input Selector switch
Primary Resistance Test Selector
Switch
Secondary Resistance Test
Selector Switch
Secondary Phase Indicator
Figure 3 ATE-100 RVDT Module Faceplate
RVDT Module Controls and Indicators
ATE-100 RVDT/LVDT Manual
2014-02-16
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Controls and Indicators
Datel Meter
Datel DMS-40PC-1-RS panel meters are used in the ATE-CFM56 test box.
The red LED display has been selected for the final configuration to improve
visibility. The red LED display has increased viewing angle and can be seen from a
greater distance.
MGain - Meter Gain Calibration Trimmer
A 20 turn trimmer pot located on the circuit board and accessible through the front
panel is used to calibrate the mA meter indication.
RVDT VAC Pk Primary Excitation Setpoint
A 10 turn Potentiometer sets the 3kHz LVDT Primary excitation voltage.
Excitation output range is from 6.5 to 7.5 VAC across 10 turns of this pot.
Coil Select Primary/Secondary
This switch selects either the Primary or Secondary AC signal for input to the AC
RMS Pk detector circuit.
Primary Resistance Test Selector Switch
This switch selects either the Insulation Resistance test or the Coil
Resistance test of the primary RVDT coil.
Secondary Resistance Test Selector Switch
This switch selects either the Insulation Resistance test or the Coil
Resistance test of the secondary RVDT coil.
Secondary Phase Indicator
These Red and Green LEDs indicate the phase relationship between the primary and
secondary coils of the RVDT or LVDT.
ATE-100 RVDT/LVDT Manual
2014-02-16
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PLA RVDT Circuit Board Supply
The circuit board has its own independent 110/220 VAC power supply.
On-board regulators provide the +15 volt and +5 volt power required for the circuits
on this PC board.
PLA RVDT Calibration
AC Peak Detector Balance Adjustment
Connect a DC voltage source with an inline polarity switch across pins 12 and 3 of
the M83723/86W1212N PLA RVDT Electrical Speed Trim connector.
Figure 4 Meter Balance Calibration Test Cable
One way to calibrate the AC Precision Rectifier Circuit is to construct a test cable as
shown and execute the following procedure.
The DPDT switch is used to swap the polarity of the DC input signal without
affecting the DC voltage level supplied. Set the DC voltage for 10 Volts DC +.25
Volts. (It’s not important what level is actually used, but it is important that the
positive and negative Datel meter values are equal in magnitude for equal but
opposite DC voltage inputs.)
Flip the polarity back and forth and observe the meter indication. If no change in
meter indication is seen when the input polarity is switched, no adjustment is
necessary.
ATE-100 RVDT/LVDT Manual
2014-02-16
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The Meter Balance Adjustment trimpot is located on the PLA RVDT circuit board.
Figure 5 RVDT PC Board Component Side showing AC Balance Trimpot.
Rock the Meter AC Balance trimmer pot. If there is no change in the meter
indication, you are on the non-adjustable polarity side of the meter polarity. Record
the meter indication.
Flip the polarity of the input voltage. Adjust the Meter Balance trimpot to get the
same meter reading as in the previous step.
Flip the polarity of the input voltage and observe that the meter indication does not
change.
Repeat the adjustment and check procedure until no further improvement can be
made.
ATE-100 RVDT/LVDT Manual
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Alternate Method using Calibration Breakout Tool
Connect a DC voltage source with an inline polarity switch into the Secondary BNC
jack on the ATE-100 Calibration Breakout Tool.
Figure 6 RVDT Connections on Signal Breakout
Set the meter input to Secondary.
Flip the DC voltage polarity back and forth and observe the meter indication. If no
change in meter indication is seen when the input polarity is switched, no
adjustment is necessary.
The Meter Balance Adjustment trimpot is located on the PLA RVDT circuit board
(Fig 5).
Rock the Meter Balance trimmer pot. If there is no change in the meter indication,
you are on the non-adjustable polarity side of the meter polarity. Record the meter
indication.
ATE-100 RVDT/LVDT Manual
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Flip the polarity of the input voltage. Adjust the Meter Balance trimpot to get the
same meter reading as in the previous step.
Flip the polarity of the input voltage and observe that the meter indication does not
change.
Repeat the adjustment and check procedure until no further improvement can be
made.
Calibrate the Primary Meter Indication
Remove the signal source and connect an RVDT to the end of the cable set as a
dummy load for the oscillator output.
A calibration tool can easily be constructed using a spare RVDT mounted in a
protractor assembly as shown:
Figure 7 Protractor for spare PLA RVDT.
RVDT Mounting method.
Connect the reference DMM to the RVDT Primary BNC connector on the ATE-100
Calibration Breakout.
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Adjust the Primary Voltage setpoint pot to get 7.07 Volts RMS as measured across
the primary, (pins 3 and 12) at the control end of the test cables or at the Primary
Exe Test BNC Jack on the Signal Breakout.
Flip the Meter Pri/Sec switch to Pri to connect the primary excitation signal to the
input of the AC RMS detector circuit.
Adjust the Pg tweaker pot to get a 7.070 Volts RMS reading on the Datel meter in
the PLA RVDT module.
Sweep, Measure and Record Calibration of Secondary Circuit
1. Connect an adjustable 3kHz AC signal source to pins 12 and 3 of the
M83723/86W1212N (MS24266R12T12SN) PLA RVDT/Electrical Speed
Trim connector or use the ATE-100 Signal Breakout.
2. Flip the Meter Pri/Sec switch to Sec to connect the secondary inputs to the AC
RMS Input.
3. Connect an NIST (NBS) calibration reference meter across the AC input
signal.
4. Adjust the signal source for approximately 0 .5 Volts.
5. Measure and record Datel Meter and external AC RMS DMM indications.
6. Increase signal source output amplitude by 0.5VAC.
7. Repeat steps 5, 6 & 7 until input voltage reaches 7.0 VAC RMS.
Calibration of Coil Ohms Test
The ATE-100 PMC Simulator has an integral coil resistance test circuit that
provides a 1mA current supply that is switched through the coils in the RVDT by
relays controlled by toggle switches on the front of the RVDT Module.
While 1mA is flowing through a coil, the DC voltage across the coil is displayed,
calibrated to display Ohms where 1mV @ 1mA = 1 Ohm.
To calibrate, connect a DMM set to measure low mA current to the ATE-100 Signal
Breakout Secondary BNC connector.
Switch the Secondary Coil Resistance test on the Resolver Module and observe and
adjust the mA trimmer on the Insulation Resistance module face so that that 1mA
flows through the meter.
Measure known RVDT coil resistances and record along with the coil resistance
measurements from the NIST Calibrated DMM.
ATE-100 RVDT/LVDT Manual
2014-02-16
Figure 8 RVDT PC Board Silkscreen Artwork
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ATE-100 RVDT/LVDT Manual
2014-02-16
Figure 9 RVDT Circuit Board Schematic
page 13 of 16
ATE-100 RVDT/LVDT Manual
Item
2
3
4
5
5.1
6
7
8
9
9.1
10
11
12
13
14
15
16
17
18
19
20
21
22
22.1
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
37.1
Quantity
1
4
4
11
4
2
1
8
1
1
2
1
2
1
2
2
2
2
2
2
8
1
1
1
1
3
7
1
4
2
1
1
2
2
1
9
2014-02-16
Reference
BR1
C1,C33,C35,C38
C2,C16,C18,C20
C3,C4,C5,C7,C8,C10a,C10b,
C19,C34,C36,C39
C6,C10,C26,C30
C7a,C15
C9
C11,C11b,C12,C13,C14b,
C15b,C40,R51
C14
C21
C28,C29
C31
C32,C37
C41
Ch1+,Ch2+
Ch1,PL11
Ch1-,Ch2D3,D4
D5,D6
D7,D8
D9,D10,D11,D12,D13,D14,
D15,D16
F1
Freq
GND1
HS1
HS2,HS3,HS4
L1,L2,L3,L4,L9,IN,Out
IRstR
Idle+,Idle-,VSV+,VSVMOV1,MOV2
MU2
OscAmp
P1,P3
P4,P6
P9
PL10,POut,PRI,PRet,PShld,
SEC,SOut,SRet,SShld
Part
BRIDGE
10uF
1uF
.1uF
33pF
.0015uF
.047uF
tbd
10pF
.47uF
0.1uF
330pF
470uF
.01uF
STrim+
STrim
STrim1N914
1N414B
1N4001
1N4005
.5A
5K
GND/SHLD
HS
HS1
LED
IdleRst
Sold
130V
DMSBCD
10K
12LONG
DB9F
26LONG
RVDT
page 14 of 16
ATE-100 RVDT/LVDT Manual
38
39
40
41
42
43
44
45
46
47
48
49
50
51
51.1
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
1
1
2
7
1
1
5
1
1
4
1
2
1
15
2
1
2
1
1
1
1
1
1
1
2
1
1
1
1
4
5
1
1
2
1
1
2
1
1
1
1
1
1
1
2014-02-16
PL12
PL13
Spare1,PL14
Q1,Q2,Q3,Q4,Q7,Q8,Q9
Q5
Q6
R2,R8,R67,R69,R71
R3
R4
R5,R35,R52,R55
R6
R13,R18
R14
R16,R31,R32,R33,R34,R36,
R53,R54,R56,R57,R58,R59,
R17,R48
R19
R20,R46
R22
R25
R26
R27
R28
R29
R30
R37,R40
R38
R39
R41
R49
R61,R63,R64,R66
RL1,RL2,RL3,RL4,RL5
RY1
RY4
Ry2,Ry5
Ry3
S1
S2,S2A
S3
SW1
Shld
Spare2
T1
TM1
TP3
Sol
DB25F
DB25
2N3904
EGC466
LM299
4.7k
15.6k
0 Ohm
100k
0 Ohms
20k
6.65k
10k
4.53k
22k
3.24k
10M
33.2k
30.1k
2k
6.04k
1.1k
1M
32.4k
See Table 1
7.5k
1.5k
1 Ohm
1k
.27k
RYOM2
Run/Test
RYOM
1mA/100V
SW SPDT
PriICR
SecICR
DPDT
Shld
DB15
TALEMA
SpdTrim
ACAmpl
page 15 of 16
ATE-100 RVDT/LVDT Manual
82
83
84
85
86
87
88
89
90
91
92
93
2
1
1
1
1
1
5
1
1
1
1
2
End of file.
U1,U2
U3
U5
U6
U7
U8
VR1,VR2,VR3,VR4,VR6
VREG1
VREG2
VREG3
VSVR
com,hot
2014-02-16
LM301A
LM124
OPA541AP
LM239
CD4070
LF356
1K
LM7805
LM7815
LM7915
VSV Rst
ts1
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