Model 10CJB-4 Four Channel Bridge Completion Box
For use with the Model 10A73-4 or 10A74-4C Strain Gage Conditioner Card for System 10
This external junction box lets you connect each 10A74-4C input to a 2-wire 1/4-bridge, 3-wire 1/4-bridge, 1/2-bridge, or full-bridge strain gage configuration. Each 1/4-bridge configuration may use either 120 or 350 ohms nominal gage resistance. The function of the Model 10CJB-4 is to “complete” the connected bridge—that is, to allow it to be seen by the Model 10A74-4C as a full (4-arm) Wheatstone bridge. The 10CJB-4 is identical to the Model 10CJB-2, except that
- It accommodates four strain-gage inputs (rather than two), each of which may be connected to a 2-wire 1/4-bridge, 3-wire 1/4-bridge, 1/2-bridge, or full-bridge strain gage configuration
- It contains a switch for selection of the excitation level to be applied to all four channels of an older Model 10A73-4 Quad 1/4 & 1/2 Bridge Strain Gage Conditioner Card only (the Model 10A74-4C, which supersedes the 10A73-4, has its own on-board jumpers for selection of the shared excitation level)
- It cannot be used with the Model AA72 Strain Gage Conditioner To connect the 10CJB-4 to the rear I/O Connector of the Model 10A74-4C, the user may furnish his or her own pin-to-pin shielded cable, or may use a special cable supplied by Daytronic.
In either case, appropriate terminal connectors will be supplied. Calibration of a channel originating from a Model 10CJB-4 requires entry of at least one calibration point in units of microstrain (microinches/inch).