Function, Specifications – Campbell Scientific 4WFB120, 4WFB350, 4WFB1K 4-Wire Full Bridge Terminal Input Module User Manual
Page 5
4WFB120, 4WFB350, 4WFB1K 4 Wire
Full Bridge Terminal Input Modules
1. Function
Terminal input modules connect directly to the datalogger's input terminals to
provide completion resistors for resistive bridge measurements, voltage
dividers, and precision current shunts. The 4WFB120, 4WFB350, and
4WFB1K complete a full bridge for a strain gage or other sensor that acts as a
single variable resistor. The difference between the three models is in the
resistor that matches the nominal resistance of a 120 ohm, 350 ohm, or 1000
ohm quarter bridge strain gage.
H
L
AG
H
L
AG
H
L
G
FIGURE 1-1. Terminal Input Module
2. Specifications
2:1 Resistive Divider
Resistors
1 k
Ω/1 kΩ
Ratio Tolerance @ 25
°C
±0.02%
Ratio
Temperature
coefficient
2 ppm/
°C
Power rating
0.25 W
Completion Resistor: 120, 350, or 1000
Ω
Tolerance @ 25
°C
±0.01%
Temperature
coefficient
0-60
°C
-55-125
°C
4 ppm/
°C
8 ppm/
°C
Power rating
0.25 W
1
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