Campbell Scientific 4WFBS120, 4WFBS350, 4WFBS1K 4 Wire Full Bridge Terminal Input Modules - Manual (Page 6)

4WFBS120, 4WFBS350, 4WFBS1K Table of Contents
ii
Figures
1-1. Terminal Input Module with CR1000 .................................................... 1
2-1. Schematic................................................................................................ 2
3-1. Strain definition ...................................................................................... 2
4.1-1. Three wire quarter bridge strain circuit ............................................... 4
4.1-2. 3-wire ¼ bridge strain wiring .............................................................. 5
4.1-3. 3-wire ¼ bridge strain with multiplexer wiring................................... 5
4.2-1. Two wire quarter bridge strain circuit ............................................... 17
4.2-2. Wiring for 2-wire gauges................................................................... 18
4.3-1. Quarter bridge strain circuit with dummy gauge ............................... 19
4.3-2. ¼ bridge strain with remote dummy gauge ....................................... 20
4.3-3. ¼ bridge strain with dummy gauge at datalogger.............................. 20
4.4-1. Three wire ¼ bridge strain circuit...................................................... 22
4.4-2. Shunting remotely across active gauge.............................................. 31
4.4-3. Circuit for shunting across dummy resistor....................................... 31
4.4-4. Wiring for shunt across dummy resistor............................................ 32
4.4-5. Two wire quarter bridge strain circuit ............................................... 35
4.5-1. Strain gage in full bridge ................................................................... 37
Table
4-1. Input Locations Used in CR10(X), 21X, and CR7 Examples .............. 11