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3. If the measured temperature is from
_10°C to10°C (14 to 50°F), when the
temperature reading is stable, press the
CAL key.
The CAL indicator will stop blinking and the
reading will be set to 0°C (32°F). The CAL
indicator will remain turned on, indicating a
field calibration is active.
If “Err” is displayed, either the displayed
reading is outside the above limits or the
batteries are weak.
