Measurement Computing DBK Part 2 - Manual (Page 62)

DBK43A & DBK43B, pg. 42 899892 DBK Option Cards and Modules
Specifications - DBK43A and DBK43B Strain Gage Modules
The following specifications apply to both strain gage modules, with exception to the connectors, as noted.
Name/Function: Strain-Gage Module
Connectors:
DBK43A: P1 DB37; mini-DIN6 for strain-gage or external excitation connections
DBK43B: P1 DB37; removable screw terminal blocks for strain-gage or external excitation connections
Number of Channels: 8
Excitation Voltage Adjustment Ranges: 1.50 to 10.50 VDC @ 50 mA
Input Gain Range: ×100-1250; separate instrumentation amplifier for each channel with gain adjustable via
externally accessible 15-turn trimpot
Accommodated Bridge Types:
Full bridge, Kelvin excitation (6-wire)
Full bridge (4-wire)
Half bridge (3-wire)
Quarter bridge (3-wire)
Bridge-Completion Resistors: On-board resistor socket locations (Rn00A, Rn00B, Rn00C, Rn00E, Rn00F,
and Rn00G) for 6 bridge-completion resistors per channel
Input Type: Differential
Input Impedance: 100 M
Ω || 100 pF
CMMR: 115 dB (DC to 60Hz)
Excitation Current Output: 50 mA max (current limited @ 60 mA)
Excitation Sensing: Local or remote
Excitation Regulation
Line Regulation: 0.01% typical 0.1% max
Load Regulation: 0.03% typical 0.2% max
Gain Calibration Reference: 5 mVDC
Gain Calibration Reference Accuracy: 0.2%
Gain Calibration Reference Drift: 20 ppm/°C
Gain Accuracy: 0.5%
Gain Drift: 50 ppm/°C
Input Offset: 40 µV typical 200 µV max (offset adjustable to zero)
Input Offset Drift: 1 µV/ºC typical 4 µV/°C max
1
Output Offset: 2mV typical 8mV max (offset adjustable to zero)
Output Offset Drift: 100 µV/°C 200 µV/°C max
1
Offset Adjustment: 0-100% of range, 0-5 VDC (15-turn trimpot)
Full-Scale Sensitivity Range
5.00 VDC Excitation: 0.8-10 mV/V
10.00 VDC Excitation: 0.4-5 mV/V
Scaling Amplifier Gain Range: ×1-10 (15-turn trimpot)
Low-Pass Filter:
3-pole, user-selected
Corner frequency (Fc) set by user component
Attenuation -3 dB at Fc
Gain ×2
Power: 9 to 18 VDC, external supply provided, 16 Watts maximum
Note 1: Total drift (referred to input) is:
) ( trimpot by set as Gain Input
Drift Offset Output
Drift Offset Input +