Model 6634C
VIbration amplifier
Features
Description
• Programmable full scale and sensitivity
• Acceleration, velocity and displacement outputs
• Setups stored in non-volatile memory
• Peak hold
• Optional RS-232 computer interface
• Optional 6 pole programmable filter
• Universal power supply
The model 6634C vibration amplifier is a microprocessorbased instrument designed to condition and display
vibration data from rotating machinery. The instrument
accepts inputs from a single-ended, differential PE
or ISOTRON® accelerometer, velocity coil, or remote
charge convertor. Full scale AC and DC output ranges
are programmable in user selected engineering units to
represent either acceleration, velocity, or displacement.
Programming of the unit is accomplished from the front
panel keyboard or optional RS-232 computer interface. Up
to ten different setups can be stored and recalled from the
non-volatile memory. An optional 6 pole filter is available,
which may be programmed from the front panel. There
are two TTL compatible latched alarm outputs provided for
warning and alert.
Velocity
Broadband Out/to External Filter
Sensitivity
Amplifier
Programmable
BP Filter
Model 35840
Charge
Amplifier
Velocity
Amplifier
Isotron
Amplifier
From
External
Filter
Velocity
Integrator
V
D
Displacement
Integrator
Output
Acceleration
A
Output
Displacement
Output
Range
Amplifier
A/D
Convertor
D/A
Convertor
AC
Output
DC
Keyboard
Display
Microcontroller
and Serial Interface
RS232
Output
RS232
Bus
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Model 6634C
VIbration amplifier
Specifications
Inputs
Piezoelectric (PE) inputs Maximum input charge Source resistance Source capacitance RCC input Constant current supply Compliance voltage Velocity coil input Input impedance External calibration Input capacitance Maximum input voltage Broadband input Input impedance External filter gain Maximum input voltage Digital discrete inputs /Alm-reset /Sys-cal Single-ended (SEPE) or differential. Accelerometer sensitivity limited to 1.5 to 150
pC/g
33 000 pC
10 MΩ minimum to meet all specifications
20 nF maximum to meet all specifications
VEL-COIL or RCC input. Internal jumper selectable
8.6 mA ±10%
24 V maximum, 20 V minimum. Input sensitivity limited to 15 to 150 mV/g.
VEL-COIL or RCC input. Internal jumper selectable
100 kΩ. Input sensitivity limted to 15 - 1500 mV/IPS
EXT-CAL
1000 pF ±0.5%
10 V pk
From external filter
10 MΩ minimum
1 ±1%
10 V pk
TTL compatible
A low pulse of at least 100 ms resets both alarms, Internal pull-up included
A low pulse of at least 100 ms starts calibration, internal pull-up included
Outputs
Type Output load Broadband/velocity/displacement Linear voltage range Offset voltage Acceleration output Linear voltage range Offset voltage AC output Full scale output voltage Offset voltage DC output Full scale output voltage Acceleration/velocity Displacement Digital discrete output Output level All outputs are single-ended and short circuit protected.
10 kΩ minimum, 3000 pF maximum
BB-OUT/VEL-OUT/DISP-OUT
0 to ±10 V pk minimum
15 mV DC maximum
ACCEL-OUT
0 to ±10 V pk minimum
15 mV DC maximum
AC-OUT
1.0 V pk, User selectable jumper is provided for 5.0 V pk and 10 V pk full scale
10 mV DC maximum
DC-OUT
1.0 V, User selectable jumper is provided for 5.0 V and 10 V full scale
1.0 VDC for pk, 0.7071 VDC for rms, 0.6366 VDC for avg
1.0 VDC for pk-pk, 0.3536 VDC for rms, 0.3183 VDC for avg
TTL compatible
Sink 12 mA maximum at 0.7 V Source 1 mA maximum at 2.4 V
Transfer characteristics
Input sensitivities PE Input Velocity coil input RCC input Gain
Broadband output/accelerometer input Broadband output/velocity coil input Acceleration output Velocity output Displacement output Full scale ac output
Acceleration Velocity Displacement Full scale dc output English 1.500 to 150.0 pC/g 15.00 to 1500 mV/ips 15 to 150.0 mV/g Metric
0.15 - 15.0 pC/m/s2
0.60 - 50 mV/mm/s
0.15 - 15 mV/m/s
50 mV pk/g pk 100 mV pk/ips pk 50 mV pk/g pk (not available for velocity input) 100 mV pk/ips pk 200 mV pk/mil pk-pk 5.0 mV pk/m/s2 pk
3.8609 mV pk/mm/s pk
5.0 mV pk/m/s2 pk
3.8609 mV pk/mm/s pk
7.7218 mV pk/μm pk-pk
2 to 200.0 g pk 20-2000 m/sec2 pk
1 to 100.0 ips pk 50-2000 mm/sec
0.5 to 50.0 mil pk-pk 20-1000 μm pk
Scaled as true-rms, peak (pk- pk for displacement), or average of the vibration amplitude
APPLIES TO CALIFORNIA FACILITY
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Model 6634C
VIbration amplifier
Specifications
Transfer characteristics continued
Frequency response Accuracy Broadband output Acceleration output Velocity output Displacement output AC output DC output Display Calibration Calibration time Calibration signal Residual noise PE input
Acceleration output Velocity output Displacement output Velocity coil input
Velocity coil output Displacement output RCC input
Acceleration output Velocity output Displacement output Alarm level Alarm accuracy Alarm triggering time The gain at the upper and lower cutoff frequency is 5% lower than the gain at 300 Hz
(Calibration frequency).
Output
Lower cutoff
frequency
Upper cutoff
frequency
Broadband Acceleration
Velocity
Displacement
AC
Acceleration
Velocity
0.2 Hz minimum
10 Hz minimum
10 Hz minimum
20 Hz minimum
20 kHz maximum
20 kHz maximum
5 kHz maximum
2 kHz maximum
10 Hz minimum
10 Hz minimum
5 kHz maximum
5 kHz maximum
Accuracy is measured over frequency range of 30 Hz to 500 Hz after calibration.
0.5% of FS, ±2% of reading
0.5% of FS, ±2% of reading
0.5% of FS, ±2.5% of reading
0.5% of FS, ±3% of reading
0.5% of FS, ±3% of reading
1% of FS, ±1.5% of reading for SEPE & velocity/RCC
1% of FS, ±2.0% of reading for differential
1% of FS, ±1.5% of reading for SEPE & velocity/RCC
1% of FS, ±2.0% of reading for differential
Low pulse of at least 100 ms at SYS-CAL starts calibration.
3 minutes typical
5.000 V pk, 300.0 Hz sinusoidal signal at EXT-CAL and/or VEL-COIL/RCC inputs
Output filtered through a 1 pole band pass from 1 Hz to 30 kHz, Internal filter disabled, input
sensitivity of 10.00 pC/g for PE accelerometer input, 100.0 mV/ips for velocity coil input, and
10.00 mV/g for RCC input
1.2 mV rms maximum with 10 MΩ and 20 nF of source impedance
0.8 mV rms maximum with input open
1.4 mV rms maximum with 10 MΩ and 20 nF of source impedance
0.8 mV rms maximum with input open
10 mV rms maximum with input open
18 mV rms maximum with 10 MΩ and 20 nF of source impedance
0.8 mV rms maximum
1.1 mV rms maximum
1.0 mV rms maximum with 250 Ω input shunt
1.0 mV rms maximum with 250 Ω input shunt
6.0 mV rms maximum with 250 Ω input shunt
Programmable from 1% to 100% of full scale. 100% disables the alarm. Alarm levels are
compared with DC output representation of peak AC output.
1% of DC output.
3 ±0.5 seconds
Environmental
Temperature range Humidity Operating 40°F to 125°F (5°C to 52°C)
Storage -40°F to 185°F (-40°C to 85°C)
95% R.H.
Power
Voltages Current 95 - 260 VAC 50-400 Hz
No options installed
150 mA typical at 105-125 VAC
75 mA at 210-240 VAC
150 mA typical at 90-110 VAC
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Model 6634C
VIbration amplifier
Specifications
Physical characteristics
Dimensions 4.88” H x 2.71” W x 15.81” D (12.4 cm x 6.9 cm x 40.2 cm)
Weight 4 lbs (1.8 kg) with no options installed.
Connectors Piezoelectric input Differential BNC
Single-ended BNC
RCC input/velocity coil Differential BNC
External cal Single-ended BNC
Discrete inputs 25 pin “D”
AC power Jones type
Ordering information 6634C-XSF, where
Engineering units Serial interface option (35843) Programmable filter option (35840A) 6 pole Butterworth
X = E English (standard)
S = 0 Option not installed
F = 0 Option not installed
X = M Metric
S = S Option (35843 board and cable) installed
F = A Option (35840A filter installed)
Lowpass range
Highpass range
Internal jumper configurable
50 Hz - 5 kHz
5 Hz - 500 Hz
Internal jumper configurable
100 Hz - 10 kHz
5 Hz - 500 Hz
Accessories
17180 EP316 EJ600 Power cable (17180V for 210-240 VAC)
Twin BNC connector (2 each)
25 pin “D” connector (1 each)
Optional accessories
4948 19” rack (1 per 6 each 6634C)
35840A Programmable filter
35843 RS-232 serial interface
16678 Blank panel for 4948 rack
Notes:
1.Maintain high levels of precision and accuracy using Endevco’s factory calibration services.
Call Endevco’s inside sales force at 800-982-6732 for recommended intervals, pricing and
turn-around time for these services as well as for quotations on our standard products.
ALARM
Alert
g
Warning
rms
OUTPUT
INPUT
TYPE
1
ips
mils
avg
pk-pk
SE/PE
mils
DIFF/PE
FILTER
SENS
2
IN/OUT
UPPER
CUTOFF
F.S.
LOWER
CUTOFF
3
4
OUTPUT
DC OUT
5
MODE
6
7
8
ALARM
WARN
9
ALERT
RESET
0
ENDEVCO
R
ENTER
S
E
R
I
A
L
I
N
EXT CAL
T
E
R
F
A
C VEL-COIL
RCC
E
OUTPUTS
SIG CONDITIONER
model 6634C
6634C REAR PANEL
6634C FRONT PANEL
Continued product improvement necessitates that Endevco reserve the right to modify these specifications without notice. Endevco maintains a program of
constant surveillance over all products to ensure a high level of reliability. This program includes attention to reliability factors during product design, the
support of stringent Quality Control requirements, and compulsory corrective action procedures. These measures, together with conservative specifications
have made the name Endevco synonymous with reliability.
APPLIES TO CALIFORNIA FACILITY
©ENDEVCO CORPORATION. ALL RIGHTS RESERVED 30700 RANCHO VIEJO ROAD, SAN JUAN CAPISTRANO, CA92675 USA
(800) 982-6732 • (949) 493-8181 fax (949) 661-7231 • www.endevco.com • Email: applications@endevco.com 012009
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