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17. 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 9).
CAL
Figure 9: Successful field calibration unlock
4. When the keys are released, the unit will go
to measurement mode (Figure 10).
°c
STABLE
Figure 10: Unit goes to measurement mode
