3.3-3 Model 4118A have the following features:
● Battery is not used All models are not battery-operated, but operate by
the voltage supplied from the system.
● Wiring check Three LEDs indicate if the wiring of the circuit
under test is correct. The P-E and P-N LEDs
illuminate when the wiring polarity of the circuit
under test is correct.
The
Reverse LED is lit when P and N are
reversed.
● Over temperature
protection
Detects overheating of the internal resistor
displaying a warning symbol ( ) and automatically
halting further measurements.
● Overload protection Halts measurement to prevent damages to the body
when voltage between VL-PE is more than 260V.
"VL-PE Hi" is shown on the display.
● 15mA Loop
measurement
Loop impedance 2000 Ω range measurement is
carried out with low test current (15mA). The
current will not cause tripping out involved RCD
even the one with the lowest nominal d
ifferential
current (30mA).
● Display The liquid crystal display has 3 1/2 digits with a
decimal point and units of measurement (Ω, A,
kA,V).
● Manual and Autotest mode
Manual －
Press and release the "Press to Test" button. The result will be
displayed for 3s and then the display will revert to AC voltage.
Autotest － The "Press to Test" button can be turned clockwise to lock it
down. In this a
uto mode, when using distribution board lead
M-7121B, tests are conducted by simply disconnecting and
reconnecting the red phase prod of the
M-7121B avoiding
the need to physically press the test button i.e. "hands
free".
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