User Guide

HI 9171, HI 9174, HI 9181, HI 9184, HI 9271 and HI 9274 can

also be used with other adapters supplying a 12VDC output. In this

case, remember to check the correct polarity of your adapter before

connecting it to the meter.

WARNING: With HI 9181 and HI 9184, if the external power

supply or batteries are disconnected, all stored data will

be erased. Always employ external power to the instru-

ment when changing the batteries to prevent loss of

data.

All Hanna thermometers have been accurately precalibrated at the

factory.

However, as a general rule, it is recommended to have all thermom-

eters recalibrated at least once a year.

For an accurate annual recalibration, contact your dealer or the

nearest Hanna Customer Service Center.

Hanna Test Plugs provide a quick and easy way to check the accuracy

of the meter by simply connecting these Test Plugs to the probe

connector of the meter.

If the reading differs by more than ±0.4°C (±0.8°F) from the Test

Plug values, the unit is due for recalibration.

Choose the right Test Plug to suit your needs:

HI 762-18C Calibration key, –18.0°C ±0.4°C

HI 762000C Calibration key, 0.0°C ±.0.4°C

HI 762070C Calibration key, +70.0°C ±0.4°C

HI 762-004F Calibration key, –0.4°F ±0.8°F

HI 762032F Calibration key, +32.0°F ±0.8°F

HI 762158F Calibration key, +158.0°F ±0.8°F

CALIBRATION