What is recommendation for regular calibration of Full Function Test Kit (FFTK) unit.

The Full-function Test Kit has been designed such that it does not require to be calibrated periodically. The test kit
performs a self-check of the microprocessor generated fault signal before being injected into the trip unit.

The Full-function Test Kit also performs a “power on” test each time the test kit is switched on. This is indicated by a
spinning Schneider Electric logo on the touch screen for a few seconds. This test checks that the test kit’s memory has
not been corrupted and that communications to the touch screen is working properly.

Due to these self-checks, no additional calibration is required.