Campbell Scientific 4WFBS1K 4WFBS120, 4WFBS350, 4WFBS1K 4 Wire Full Bridge Ter - Page 7

WFBS120, 4WFBS350, 4WFBS1K, Full Bridge Terminal Input Modules TIM

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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: Ratio tolerance @ 25 °C: Ratio temperature coefficient: Power rating per element: 1 kΩ/1 kΩ ±0.01% 0.5 ppm/°C (-55°C to 85°C) 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

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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 k
Ω
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