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7
8
1. Before starting the test :
(a) The circuit under test must be completely de-energized.
Check the fuse before testing.
Connecting to an energized circuit while the test is active will
blow the fuse.
See Testing the fuse later in this manual.
If the detected voltage is above 2V, “>2V” will appear on the
display.
In this condition, the test is inhibited.
(b) Short the test leads before measurement, and press the blue
button to compensate the probe resistance for <2
Ω
.
2. Lock mode : Press the Lock button to enter the Lock Mode.
Then press the TEST button to start the test. The test voltage will
continue to be applied until the TEST/LOCK button is pressed again.
3. The meter displays the “>” symbol and the maximum resistance for
the range when measured resistance is higher than the maximum
display range.
Measuring Insulation Resistance
Ω
Ω
V
INSULATION
PASS
RECALL
PI/DAR
COMPARE
PI
DAR
TEST
V
V
100200
500KMΩ
0
100K
10M
100M
100MK
10Gk
100Gk
AUTO
LOCK APO
SENSE
KMΩ
GΩ
µmA
MΩ
COMP
STORE
LOCK
61-797
>600V
COM
OFF
50V
V
100V
250V
500V
500V
1000V
FUSED
CAT. IV
600V
0
0
LPF
Leak
age
Cu
rre
nt
AC
DC
~
AC
DC
~
MEM
TEST
+
–
~
Press
&
Hold
TEST
0
100K
10M
100M
100MK
10Gk
100Gk
MΩ
0
100K
10M
100M
100MK
10Gk
100Gk
V
DC
TEST
MΩ
V
DC
=
TEST
LPF
1. Before starting the test:
The circuit under test must be completely de-energized. If the
voltage detected is above 30V, “>30V” will appear on the display.
In this condition, the test is inhibited.
2. Press the blue button to display insulation resistance or Leakage
current during the test or when the test stops.
3. Lock mode: Press the Lock button to enter the Lock Mode. Then
press TEST button to start the test. The test voltage will continue to
be applied until the TEST/LOCK button is pressed again.
4. Release the TEST button before removing the test leads (to enable
the tester to discharge capacitive circuits). If the screen displays
volts, wait until it reaches zero.
5. The meter displays the “>” symbol and the maximum resistance
for the range when measured resistance is higher than the maximum
display range.