Model 2793
ISOTRON® signal conditioner
Features
Description
•16-channel constant current supply/
amplifier for ISOTRON®/IEPE compatible accelerometers or remote charge convertors
•“D” output connector for simple connection to D/A board
•Wide frequency range: 1 Hz to 30 kHz
•LED status indicators
•Low per channel cost
The Endevco® model 2793 16-channel signal conditioner is
an economical power supply/buffer amplifier for ISOTRON
accelerometers or other piezoelectric voltage mode
transducers. It can also power Remote Charge Convertors
(RCC) in a high impedance piezoelectric measurement system.
Each channel provides a constant current excitation (4 mA or 10
mA) for the transducer or RCC, and all outputs are buffered for
driving long cables. Amplifier gain of 1 or 10 is set by an internal
jumper. Individual LED status indicator informs the user of
short, open, or normal conditions.
Typical Application
Model 2793
(2 of 16 channels shown)
ISOTRON / IEPE Type
Accelerometer
Remote Charge
Convertor
Analyzer
or
D/A Board
High Impedance
Piezoelectric
Accelerometer
"D" Connector
or BNC Outputs
Model 2793 Block Diagram, per channel
4 mA
or
10 mA
Transducer
Input
AC/DC
Power Supply
Status
Indicator
(Common)
Gain Selection of 1 or 10
(Set Internally)
Decoupling
Capacitor
AC Power
Input
Output
Model 2793
ISOTRON® signal conditioner
Specifications
Inputs
Type
Input impedance
Excitation current
Compliance voltage
Single-ended, constant current two-wire system
> 20 k Ω.
4 mA or 10 mA ±10%, set by internal jumper, per channel
> 18 V. This voltage is the sum of AC and DC components
Outputs
Type
Output impedance
Linear output voltage
Linear output current
Single-ended one side connected to circuit ground
< 10 Ω, in series with at least 40 μF
10 V pk-pk (3.535 V rms) or greater
2.0 mA pk-pk or greater
Transfer characteristics
Gain
Accuracy
Frequency response
Lower cutoff frequency
Upper cutoff frequency
Amplitude linearity
Residual noise
Total harmonic distortion
Crosstalk
1 or 10 controlled by internal jumper, per channel
±1.5% (Including variation with temperature and time)
Flat within ±5% from 1 Hz to 30 kHz, reference at 1000 Hz
-5% at 1 Hz, (typical)
-5% at 30 kHz, (typical)
1% of reading from best-fit straight line approximation
45 μV rms maximum RTI with input shunted with 100 ohms or 100 μV rms RTO, whichever is greater
Less than 1% for signals of full scale or less at any gain from .5 to 20.0
20.0 mV rms maximum RTO or 1.0 mV rms RTI whichever is greater
Crosstalk specification is valid for the following conditions:
One channel set at 100% of nominal sensitivity and x1 gain
Adjacent channel set at any gain up to 20.0 (eg. 50% nominal sensitivity and x 10 gain)
with a 250 Ω shunt resistor at the input
Environmental characteristics
Temperature
Humidity
Operating +32°F to +122°F (0°C to +50°C)
Storage -65°F to +185°F (-54°C to +85°C)
95% R.H.
Power
Line voltage
100/120/220/240 VAC 50 to 60 Hz (switch selectable)
Physical
Dimensions
Weight
Front panel features
Power indicator
Status indicators
Output connectors
Rear panel features
Input connectors
Output connectors
Accessories:
Instruction manual
EW599
19” rack mounting, 1.73” h x 19.00” w x 9.45” d (44 mm x 483 mm x 240 mm)
3.97 lbs. (1.8 kg)
LED indicates when power is applied
LED will light green, when the transducer is connected properly. The LED will light red when the
input is shorted. The LED will not light when the input is open.
BNC
BNC
25-pin “D” (in parallel with front BNC’s)
IM2793
AC power cord
Notes:
1. Maintain high levels of precision and accuracy using Meggitt’s factory calibration services.
Call Meggitt’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.
Continued product improvement necessitates that Meggitt reserve the right to modify these specifications without notice. Meggitt 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
©Meggitt (San Juan Capistrano), Inc. All Rights Reserved 30700 Rancho Viejo Road, San Juan Capistrano, CA 92675 USA
(800) 982-6732 • (949) 493-8181 fax (949) 661-7231 • www.endevco.com • Email: applications@endevco.com 020213