Device-Specific Strain Gage Calibration Information

The following devices have additional issues related to strain gage calibration.

SCXI-1520 (with SCXI-1314 terminal block), PXI-4220

Offset Nulling—These devices use hardware nulling circuitry. The resulting calibration values are stored in the AI.Bridge.Balance.CoarsePot and AI.Bridge.Balance.FinePot attributes of your strain virtual channel. Any residual offset value is stored in the AI.Bridge.InitialVoltage attribute of your strain virtual channel for additional software compensation.

SCXI-1121 (with SCXI-1321 terminal block)

Offset Nulling—Use the offset nulling potentiometer circuit on the SCXI-1321 to reduce initial offset before performing the calibration. Click Measure as you adjust the potentiometer to read the new offset value. Any residual offset value is stored in the AI.Bridge.InitialVoltage attribute of your strain virtual channel for additional software nulling compensation.

SCXI-1122 (with SCXI-1322 terminal block)

Offset Nulling—The hardware cannot perform offset nulling, so the offset value is stored in the AI.Bridge.InitialVoltage attribute of your strain virtual channel for software nulling compensation.