It's advised that you have your MC4 test leads with test probes calibrated every 12
months to ensure its accuracy, or you may be unfortunate and have to
have your MC4 test leads with test probes repaired.
Calibrate your MC4 test leads with test probes
If you wish to calibrate your MC4 test leads with test probes, please locate the nearest
service center or contact us directly using the link below.