It's advised that you have your Proving Unit for Live Line Tester calibrated every 12
months to ensure its accuracy, or you may be unfortunate and have to
have your Proving Unit for Live Line Tester repaired.
Calibrate your Proving Unit for Live Line Tester
If you wish to calibrate your Proving Unit for Live Line Tester, please locate the nearest
service center or contact us directly using the link below.
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