Pyromation 28-02700-T - Manual (Page 13)

11
FIELD CALIBRATION
The thermometer is factory calibrated and does not
require calibration before use. The CAL function
allows single point calibration of the thermometer,
at 0°C (32°F) to compensate for thermocouple off-
set error. It is not necessary to perform a field cali-
bration to obtain specified meter accuracy. Use the
field calibration feature to improve thermometer/
probe accuracy or to compensate for thermocouple
drift.
1. Follow steps 1 through 4 in OPERATION sec-
tion.
2. Pack sensing end of probe in a container tightly
packed with crushed ice and filled with distilled
water. Allow temperature to stabilize.
3. Press and hold the CAL key for 5 seconds to
enter the calibration mode, the CAL annunciator
on the display starts blinking. Release the CAL
key.
4. If the measured temperature is from
−
10°C to
10°C (14 to 50°F), when the temperature read-
ing is stable, press the CAL key.
The CAL indicator will stop blinking and the read-
ing will be set to 0°C (32°F). The CAL indicator
will remain turned on, indicating a field calibra-
tion is active.
If “Err” is displayed, either the displayed reading is
outside the above limits or the batteries are weak.
CANCELING A FIELD CALIBRATION
1. Turn the thermometer off.
2. Hold the CAL key down while pressing the
ON/OFF key.
The field calibration is canceled and the thermom-
eter reverts to the default factory calibration. The
CAL annunciator is now turned off.