16
15. CLEAR
FIELD
CALIBRATION
To clear user calibration:
1. Turn the thermometer off.
2. Hold the
cal
key down while pressing
the on/off key.
3. The measurement mode window
appears without the CAL indicator to
indicate that the user calibration has
been successfully cleared.
16. FIELD CALIBRATION UNLOCK
The calibration unlock feature enables field
calibration operation. To unlock field
calibration:
1. Turn the thermometer off.
2. Hold
the
cal
key and
hold
key down
simultaneously, then press the
on/off
key.
3. The “CAL” indicator appears
momentarily with the version-model
window to indicate that the user-
calibration function has been unlocked
successfully (Figure 10).
CAL
Figure 10: Successful field calibration unlock