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*After turning the megohmmeter on, the display will show the icon and the
approximate amount of battery life as a percentage.
Indicators
The Indicator Table provides information for interpreting the battery status indicator, results of
the insulation test, and the tones produced by the speaker.
Indicator Table
Feature Indication Explanation
No display Good battery
Battery life is limited.
Battery
Flashing
Status*
Battery is low. Measurements may not be accurate.
Continuous Replace the battery.
BAT Battery is discharged. Unit will shut down automatically.
A short, • any button is pressed
low-pitched
• the automatic power off feature is turning the unit off
tone
• lead resistance compensation
• TIMER function (sounds at 30 seconds,
1 minute and 10 minutes)
A continuous, • the measurement is lower than the minimum alarm setpoint
Speaker
low-pitched
• the measurement is higher than the maximum alarm setpoint
tone
A short, An inactive button is pressed (except the yellow test button)
high-pitched
tone
A repeated, The automatic voltage check has measured more than 25 volts
high-pitched and the insulation resistance test is in progress.
tone Insulation test will be disabled.
OL The insulation resistance is greater than 2.0 GΩ
The insulation resistance is greater than 1.1 GΩ
Insulation ––– The insulation resistance is less than:
Resistance • 50 kΩ at 250 V
Test • 100 kΩ at 500 V
• 200 kΩ at 1000 V
The insulation resistance is less than 70 kΩ
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