User Guide

USER CALIBRATION

The HI 935005N and HI 935009 models can be calibrated at 0°C by

using an ice bath.

• Prepare an ice bath with approximately equal volumes of distilled

water and chopped ice made from distilled water.

• Immerse the temperature probe in the center of the ice bath,

taking care not to touch the ice with the probe tip.

• Ensure that the meter is measuring a temperature within ±3°C.

• To enter the Calibration mode, press and hold the CAL button for

about 5 seconds.

• The CAL tag turns on to indicate that

the Calibration mode has been entered.

Note: If the measurement is outside the

±3°C window, the meter does not

enter Calibration mode.

• When the meter reaches the stability condition, which is detected

when the measurement remains within ±0.2°C for 5 seconds,

the calibration is accepted and the reading becomes 0°C (32°F).

• The meter then automatically returns to normal mode.

Note: To exit the Calibration mode at any time, press the CAL key.

Note: User calibration cannot be entered in relative or in T1-T2 mode.

Note: User calibration is only performed on the current channel

displayed (T1 or T2).

All Hanna thermometers have been accurately pre-calibrated at the

factory.

It is generally recommended to have all thermometers recalibrated at

least once a year.

For an accurate recalibration, contact your nearest Hanna Customer

Service Center.

FACTORY RECALIBRATION