Amprobe IR-750 Infrared-Thermometer - Manual (Page 23)

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TROUBLE SHOOTING
Code Problem Action
OL Target temperature is over range Select target within specifications
-OL Target temperature is under range Select target within specifications
Battery indication
Low battery Check and/or replace battery
Blank display Possible dead battery Check and/or replace battery
Laser does not work
1. Low or dead battery
2. Ambient temperature above 40°C (104°F)
1. Replace battery
2. Use in area with lower ambient
temperature
Beeper beeps
continuously Check if high/low alarm has been set and if
the measurement value is over the limit Reset high/low alarm setting or
cancel the limit setting
BATTERY REPLACEMENT
To install or change one 9V battery (see below):
1. Push the button and pull the handle downward to open battery cover.
2. Install the battery noting its correct polarity.
3. Re-install the battery cover.
Battery: 9V 6F22 alkaline battery or equivalent