For calibration is it required to send back the tester back to the factory or can we run a calibration using our shop standard?
The tester provides a built-in test mode that aims at validating the accuracy of the device by comparing it to a high-accuracy, NIST-traceable polyphase test board or standard. This test is meant to be done in a lab environment and at a rate of one or twice per year, depending on the customer’s guidelines for equipment validation.
Required material
- NIST-traceable polyphase test board or standard
- 120 to 480 V
- 0 to 50 A
- Voltage, Amps and phase angles individually programmable for each line
- Computer (with Windows 10)
- Banana plugs and wiring to connect ST-3/XT3 device to standard (if not socket based)
As there are no moving parts on both units, it’s very rare that the calibration drifts.
Also read: How about yearly accuracy calibration of the tester? Do the accessories need to be calibrated?
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