Rozzerdinho
DIY
Hi,
I perform annual PAT checks for my company (office and workshop). The Apollo 400 machine we use has recently gone for calibration and service and since it's come back, items which passed easily last year (Earth Continuity below 0.1ohm), are now not passing. I've now raised the earth continuity limit to factor in cable resistance etc. but why is it that some items which were say 0.8ohm are now 0.17ohm and wont pass? Any ideas?
Many thanks,
I perform annual PAT checks for my company (office and workshop). The Apollo 400 machine we use has recently gone for calibration and service and since it's come back, items which passed easily last year (Earth Continuity below 0.1ohm), are now not passing. I've now raised the earth continuity limit to factor in cable resistance etc. but why is it that some items which were say 0.8ohm are now 0.17ohm and wont pass? Any ideas?
Many thanks,