Datasheet

www.vishaymg.com [e-mail] Document Number: 11247
10 Revision 08-Jun-06
Model 3800
Vishay Micro-Measurements
Wide Range Strain Indicator
SPECIFICATIONS
Range and Display:
±19 999 counts direct-reading LED display.
Resolution:
1µε at any gage factor from 0.0500 to 50.00.
0.10µV/V as a transducer indicator.
Linearity:
±0.01% of full scale.
Balance Range:
Coarse balance: ±2.5% to ±100% of full scale per step, in
32 total steps.
Fine balance: ±1.25% to ±50% of full scale; overlaps each
coarse balance step.
Balance Method:
Electronically injected counter-emf.
Gage Factor:
Range: 0.0500 to 50.00; displayed by LED readout when in
the SET position.
Resolution:
0.0001 from GF of 0.0500 to 0.5000
0.001 from GF of 0.500 to 5.000
0.01 from GF of 5.00 to 50.00
Linearity: ±0.05% of full scale.
Accuracy: ±1 least significant digit.
Excitation Voltage:
1.000 to 15.000Vdc±1mV±0.02%. Settable in 1V increments
by front-panel thumbwheel switch.
Temperature stability: ±0.01%/°C.
Amplifier:
Temperature effect on zero: ±1.0µV/°C RTI
†
max.;
±0.50µV/°C RTI
†
typical.
Temperature effect on span: ±0.005%/°C max.
Warm-up drift: less than ±3µV RTI
†
from turn-on to
5 minutes.
Random drift at constant ambient temperature:
less than ±1µV RTI
†
.
Common-mode rejection: greater than 100dB at 50-60Hz.
Common-mode voltage: ±8V max.
Input impedance: greater than 100MΩ differential and
common mode.
Input circuits: quarter-, half-, and full-bridge circuits. Internal
bridge completion provided for 120/1000Ω and 350Ω quarter
bridges; 60 to 2000Ω half or full bridge.
Calibration: shunt calibration resistors are provided across
internal 120Ω and 350Ω dummy gages to simulate
5000µε±0.05%. Calibration resistors are located on the rear
of instrument and may be changed to suit specific
requirements. Contact closures are provided for two rear-
panel-mounted resistors to facilitate any calibration
configuration. Typical use is double-shunt calibration of
transducers.
Analog Output:
Linear output:±10.00V max; adjustable over 11:1 range by
a ten-turn potentiometer mounted on the rear
panel.
Output load: 2kΩ min.
Bandwidth: GF >0.500, dc to 4.5kHz (–3 dB nominal).
GF <0.500, dc to 2.0kHz (–3 dB nominal).
Output noise: less than 2.5µV peak to peak 0.10 to 10Hz,
RTI
†
. Less than 2µV rms dc to 5kHz, RTI
†
,
plus 0.005% of full scale, RTO (referred to
output).
Remote Sense:
Remote sense connections provided at transducer
connector.
Remote sense error: less than 0.0005%/Ω of lead resistance.
Maximum lead resistance 40Ω or less.
Power:
115/230Vac, 50-60Hz, less than 10 volt-amperes.
Size and Weight:
6.5 H x 11.0 W x 12.5 D in (165 x 280 x 318mm).
10.2lb (4.6kg).
†
Referred to input
All specifications are nominal or typical at +23°C unless
noted.
Companion instruments for use with the Model 3800
Model V/E-40 Decade Resistor Strain Gage Simulator, and
Model 1550A Strain Indicator Calibrator — with these
specialized instruments, the capabilities and sensitivity of
the Model 3800 can be further extended by making critical
measurements through precise strain simulation.