5
Rotary Function Switch Positions
Turn the tester on by selecting any measurement setting.
HOLD Max/Min Button
Instant-pressing the HOLD button the first time will hold
the values at that instant in the primary display. Pressing
it a second time will return it to current reading. Pressing
and holding the button for 2 seconds will allow reading
the MAX value, and an additional instant-pressing will
switch it to display the MIN measured value. These can
be toggled by instant-pressing the button. To go back to
reading current values, press and hold the button again
for 2 seconds.
Lock Button
Used when testing insulation resistance. Press the
LOCK button and then push down the TEST button.
This will apply the high-voltage source and display the
test result. Pressing the TEST button again will shut off
the high-voltage and exit from the insulation resistance
testing.
Test Button
Used when testing insulation resistance. Pressing the
TEST button will apply the high-voltage source and
display the test result. Pressing the TEST button again
will shut off the high-voltage and exit from the insulation
resistance testing.
750V
1000V
Insulation Tester
400
125V
250V
500V
1000V
TEST
LOBAT
HV
(1)
POL1
(2)
(1)
OHM
BZ
(2)
(2)
POL2
4
(1)
BAR
1
8
5
1
2
3
4
6
7
8
9
10
CEM
DT-5505
5
1065DGMAN_20250-60 DS Insulation tester manual.indd 5
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