General IRTC40 Mode D'emploi page 16

9. To widen the setpoint bandwidth from
1°F/0.5°C, with the trigger released and
a reference temperature on-screen press
the
pointer above 5°F/3°C, or twice to
choose 10°F/5.5°C.
OFF
Using the
bandwidth
10. To change the reference temperature,
you can: 1) allow the IRTC40 to power
itself off and establish a new reference
temperature "from scratch" by starting
with the
2) overwrite the old reference
temperature by the new temperature
by targeting a different surface and
pressing the °C/°F/SET button.
16
/OFF button once to illuminate the
1°F
0.5°C
/OFF button to change the setpoint
pointer above OFF, or
5°F
3°C
10°F
5.5°C