The Difference Between Internal Calibration and Self Calibration

Updated Jul 12, 2018

Reported In

Software

  • Measurement & Automation Explorer (MAX)

Driver

  • NI-DAQmx

Issue Details

I'm calculating the Absolute Accuracy of my device. I've noticed datasheets for DAQ devices sometimes refer to an "Internal cal" and other documents refer to a "self cal." NI-MAX only has a self calibration. Is there a distinction between an "internal cal" and a "self cal"?

Solution

These two terms can be used interchangeably.

Additional Information

Self Calibration is used to calibrate a device for temperature changes based on an internal reference voltage. The reference voltage is routed to all channels on the board, then read at a variety of gain settings and compared to an expected value. For more detail see: What Are the Differences between Self-Calibration and External Calibration?

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