ABB eVM1 Installation And Service Instructions Manual page 41

Check Device Status: Available when an active communication link has been established with the
IED. Shows calibration status; gain and offset must be at 111 for valid calibration.
Calibration sub-Menu: calibration enables you to correct errors due to device tolerance within the
accuracy class and to improve overall analog input acquisition precision.
Fig. 22
Primary Calibration Factors: the calibration factors for Rogowski sensors L1, L2, L3 (available
on R. sensor label) and for Earth CCT can be introduced and read.
Fig. 23
Start Secondary Calibration: with a pop-up window, this function, executed at IED production
and accessible only to service personnel, provides the possibility of calibrating the IED analog
channels by injecting a reference signal. Refer to calibration and test procedure document
1VCD6000132.
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