KYORITSU 4140 - Manual (Page 9)

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4. Features
The KEW4140 LOOP/PFC/PSC tester performs three function in
one instrument.
1Loopimpedancetester
2 Voltage tester
3Phaserotationtester
TheKEW4140havethefollowingfeatures:
ATT (Anti Trip Technology) ATT enables a measurement without
tripping the RCDs with the rated
residual current of 30mA or more.
Wiringcheck Three Wiring symbols indicate if
the wiring of the circuit under test is
correct.
Over temperature protection
Detects overheating of the internal
resistor displaying a warning symbol
( ) and automatically halting further
measurements.
Auto power off Automatically switches the instrument
off after a period of approximately 10
minutes.
The Auto power off mode can only be
cancelled by switching the instrument
on again.
BackLight Powered off automatically when 2
min pass after the last operation.
SUBDisplay PFC,PSCandL-NLOOPresistance
values are also measured at LOOP
L-PE test and displayed on the Sub
Display.