Omega CNiS8C, CNiS8DH Strain Gauge, Figure below shows the wiring hookup for 4-wire bridge input

2.3.4 Strain Gauge

The figure below shows the wiring hookup for 4-wire bridge input.

Figure 2.7

a)4-Wire Voltage/Bridge Input with Internal Excitation Wiring Hookup

b)4-Wire Bridge Input with External Excitation Wiring Hookup

In 4-Wire connections the voltage drop across long excitation lead wires of strain gauge bridge may cause measurement errors. The output of a strain gauge bridge also depends on the stability of excitation voltage. To correct for voltage drop and changes in excitation voltage, 6-wire input configuration and ratio measurement are used.

In order for the Ratiometric to work properly, the External Excitation should not drop below 4.6 Vdc.

The figure below shows 6-wire hookup for 6-wire bridge input.

Figure 2.8

a)6-Wire Bridge Input with Internal Excitation and Ratio Measurement Wiring Hookup

b)6-Wire Bridge Input with External Excitation and Ratio Measurement Wiring Hookup

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