MODEL 4077 SPECIFICATIONS (for general 4000 Series Physical,
Electrical, and Environmental specifications—including Logic
I/O—see Appendix A of the 4000 Series
System Instruction
Manual)
:
Transducer Type and Range: Conventional 4-arm strain gage bridge,
nominal 120 ohms or higher, with a full-scale range of 1.5 or 3.00
mV/V (the standard range setting is 3.00 mV/V; see Appendix D if
you require a 1.5 mV/V setting). Since channel zeroing is by digital
techniques, no input balance control is provided. The allowable
input range, therefore, must include any initial unbalance (which, in
commercially produced strain gage transducers, is usually
negligible). Other transducers may have to be externally trimmed to
be used with the 4077, if zero unbalance exceeds 20% of full scale.
The optional Model 10CJB-2 Bridge Completion Card is an
external accessory that lets you connect your 4077's analog input to
a
2-wire 1/4-bridge, 3-wire 1/4-bridge, 1/2-bridge
, or
full-bridge
strain
gage transducer. Each 1/4-bridge configuration may use either 120
or 350 ohms nominal gage resistance (see Appendix F for details).
Excitation: Selectable 5 or 10 V-DC (i.e., ± 2.5 or ± 5 V-DC,
respectively), nominal; ± 80 mA, maximum, for each voltage.
NOTE: The 10-V setting is "standard"; if 5-V excitation is required,
see Appendix D.
Amplifier: Differential input, programmable gain.
Normal-Mode Range:
± 50 mV peak, operating; ± 8 V without instrument damage.
Common-Mode Range:
± 0.25 V peak, operating; ± 8 V without instrument damage.
Common-Mode Rejection Ratio: –90 dB at DC; –120 dB at 60 Hz,
1 kHz, and 3 kHz.
Input Impedance (Differential and Common-Mode): Greater than
100 MΩ.
Offset:
Initial: ± 0.02% of full scale.
vs. Temperature: ± 20 ppm / °C.
vs. Time: ± 10 ppm / month.
1.4
Model 4077 Description and Specifications 1.a
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