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seconds later, the green LCD backlight
will turn off, but the last measurement
will remain visible. One minute later, the
IRTC40 will automatically power off.
4. To change the measurement unit to °C,
press the °C/°F/SET button after SCAN
disappears but before the instrument
powers off. To return to Fahrenheit
measurement, press the button again
during the same period of time.

SCAN MODE

1. Power on the IRTC40 by squeezing and
holding the yellow measurement trigger.
2. Without releasing the trigger, aim the gun
at an interior wall of the room you are in
and press the
will extinguish the
and illuminate the
1°F/0.5°C.
3. Without releasing the trigger, press the
°C/°F/SET button. Doing so selects the
temperature of the wall as the reference
temperature and 1°F/0.5°C as the
setpoint bandwidth. On the LCD, the term
NORMAL will appear on the top line of
/OFF button once. This
pointer above OFF
pointer above
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