2.3.2 Strain Gauge
The figure below shows the wiring hookup for 4-wire bridge input.
Figure 2.6
a) 4-Wire Voltage/Bridge Input
b) 4-Wire Bridge Input with
with Internal Excitation
External Excitation Wiring
Wiring HookupHookup
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 2.7
a) 6-Wire Bridge Input with
b) 6-Wire Bridge Input with
Internal Excitation and
External Excitation and
Ratio Measurement Wiring
Ratio Measurement Wiring
HookupHookup
9
Summary of Contents for iLD Big Display
Page 9: ...PART 2 SETUP 2 1 Mounting Figure 2 1 Mounting 5...
Page 53: ...NOTES 49...
Page 54: ...NOTES 50...
