Vibro-meter 200-595-100-014 200-595-072-122 VM600 CPUM card

Calibrations must be performed after power-up. Therefore, as part of the initialization routine, each channel in use must be selected, and the channel must be configured. For example, select the reference source and set the gain. An offset and gain calibration must then be performed on the channel. Only one channel can be enabled when calibrations are being performed. If multiple channels are enabled, the ADC only calibrates the first channel in the sequence. The channel must be recalibrated if the gain is changed to another gain value.

Internal calibration is usually performed to adjust 

the offset error and gain error because of the ADC drift performance. The CN-0381 shows how to use the internal calibration to fine tune the offset and gain error of the AD7124-8 when it is exposed across temperature ranges. Perform system calibrations to compensate for the offset and gain error contribution by the front end or external circuitry of the ADC system. The system calibration is best applied on a weigh scale application because the load cell accuracy drifts. To fine tune the accuracy caused by the drift, the user must perform system calibration

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