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15
INSULATION RESISTANCE MEASUREMENTS
a)
Set the rotary function switch to the
INSULATION
position, and Press t
he
RANGE
button to chose one of the voltage which
display on the left .
b)
Connect two testing lines to the tested
;
c)
Push down and hold the “TEST” button /or press the “ LOCK” key
stoke first and then the “TEST” button, if the tested is electriferous and its
voltage ( AC/DC) is over 30V, it will refuse work and no high-voltage te
sting occurs, if the tested is diselectriferous or its voltage is
lower than 30V, it will enter into the formal testing process and brings
the high-voltage. on the primary display, the insulation resistance
in MΩ is indicated in-phase with analog bar; on the auxiliary display,
the tested insulation voltage in V (DC) is indicated, the symbol “
” flas
hes and the buzzer warns frequently
d)
Being free from the “TEST” button or pushing down the “TEST”
button in the “LOCK “ status can exit from the “LOCK” status and shutoff t
he high-voltage
,
synchronously, the resistance values is indicated in th
e primary display will be held, and the auxiliary display still be in the sta
tus of monitoring the insulation voltage for the tested .
e)
Subsequently, discharge the balance insulation voltage of the tested thr
ough the inner switch of the meter.
POWER TOOLS AND AMALL APPLIANCES
This test would also apply to other similar equipment that has a line cord.
For double insulated power tools, the megohmmeter lead shown connect
ed to the housing would be connected to some metal part lf the tool(e..g c
huck,blade).
Note:The switch of the device must be in the “ON”position and the main p
ower should be disconnected.
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