Amprobe IR-750 Infrared-Thermometer - Manual (Page 35)

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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 measurement value
has over the limit?
Re-set 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