Principle of measurement by "fault loop" for installations with neutral as per diagram indication Earth loop measurement current less than the drop-out threshold of the 30mA circuit breakers Measurement of the earth resistance by 3 1/2 digit display from 0 to 1999Ω (resolution 1Ω measurement updated every 1.5s)
Two-colour back-lit LCD display
IEC 61010-1 EN 61557-4
Installation category III
Class II IP40 ,IK06