6
Zero/Light Button
Instant-pressing the ZERO/LIGHT button will zero the pri-
mary display (mainly used for 400
Ω
, the low resistance
testing). Instant-pressing the button a second time will
return the display to current reading. Pressing and holding
the button for 2 seconds will cause the LCD backlight to
turn on. Pressing the button again for 2 seconds will cause
the backlight to turn off. The backlight will turn off auto-
matically after 15 seconds.
Display Descriptions
• Primary display indicates the current function testing
values.
• Secondary display shows the output DCV while you test
the insulation resistance, and the battery voltage while
the ACV.
• Analog bar indicates the current function testing value
shown in the primary display.
•
symbol flashes frequently if the voltage is over
30 V when testing the insulation resistance.
• •))) symbol flashes frequently and the buzzer warns
continually if the outside voltage is over 30 V when
testing the insulation resistance. This symbol also
indicates when resistance measured
≤
35
Ω
and the
buzzer sounds continuously.
• Lock button is pushed down while testing the insulation
resistance and the symbol is indicated.
• LOBAT shows when the voltage drops below 7.5 V.
1065DGMAN_20250-60 DS Insulation tester manual.indd 6
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