Campbell Scientific 4WFBS120, 4WFBS350, 4WFBS1K 4 Wire Full Bridge Terminal Input Modules - Manual (Page 7)

4WFBS120, 4WFBS350, 4WFBS1K 4 Wire
Full Bridge Terminal Input Modules (TIM)
1. Function
The 4WFBS120, 4WFBS350, and 4WFBS1K Terminal Input Modules (TIM)
complete a full Wheatstone bridge for a single 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. It can also be used to complete the back
half of a Wheatstone bridge for use in a ¼ bridge strain circuit (1 active
element) using a dummy gage, or in a ½ bridge strain circuit (2 active
elements).
FIGURE 1-1. Terminal Input Module with CR1000
2. Specifications
2:1 Resistive Divider
Resistors:
1 k Ω/1 kΩ
Ratio tolerance @ 25 °C: ±0.01%
Ratio temperature coefficient: 0.5 ppm/ °C
(-55 °C to 85°C)
Power rating per element: 0.1 W @ 70 °C
Completion Resistor: 120, 350, or 1000
Ω
Tolerance @ 25 °C: ±0.01%
Temperature coefficient: ±0.8 ppm °C -1
(-55 °C to 85°C)
Power rating: 0.25 W @ 70 °C
1