Sper Scientific 800108 IR Thermistor Pen - Manual (Page 12)

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This model uses four LR44 1.5
V batteries: two batteries
operate the thermistor
thermometer and two batteries
operate the IR thermometer.
1. Press ON/OFF button to turn
the meter off.
2. Remove the old batteries
and replace with new LR44
batteries, ensuring correct
polarity.
3. Reassemble the unit.
Note…
The temperature scale will not
change when the meter is
turned off. Both thermometers
will revert to the default scale
(Fahrenheit) when the batteries
are replaced.
BATTERY
REPLACEMENT