How Accurate Is National Instruments' External Calibration?

Updated Oct 14, 2019

Issue Details

  • What level of accuracy will a device be calibrated to if I send it for external calibration?
  • Are there quantifiable figures for external calibration?
  • What level of error is associated with external calibration?
  • Where can I find information about the types of tests involved in external calibration?


Details on the types of calibration tests and the accuracy to which these are done can be found in the Accreditation Scope & Certificate document. The standard for these tests varies depending on which region the NI Service Centre is based. The documents for each region can be found on the Service Centres page.

The document specifies the type of test under the "Parameter/Equipment" section, while the guaranteed accuracy range is specified in the "CMC" section.

External calibrations will come with an Accredited Calibration Certificate that lists the exact values to which the device will be calibrated. An example of this certificate has been attached.

Further information on the types of Repair/Replacement/Calibration Services can be found in the NI Service Programs for Hardware table.

Additional Information

External calibration is a more accurate method of calibration than self calibration since self calibration is dependent on an internal voltage reference to the device.

For more details on the differences between external and self calibration, refer to The Differences Between Self-Calibration and External Calibration document.