Owner manual

TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION

TEMPERATURE CALIBRATION

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(for technical personnel only

))

)

All the instruments are factory calibrated for temperature.

Hanna’s temperature probes are interchangeable and no temperature

calibration is needed when they are replaced.

If the temperature measurements are inaccurate, temperature recalibration

should be performed.

For an accurate recalibration, contact your dealer or the nearest Hanna

Customer Service Center, or follow the instructions below.

• Prepare a vessel containing ice and water and another one containing

hot water (around 50 ºC). Place insulation material around the

vessels to minimize temperature changes.

• Use a calibrated thermometer with a resolution of 0.1 ºC as a

reference thermometer.

• With the instrument off, press and hold down the CFM & SETUP

keys, then power on the instrument. The “CAL” tag will appear and

the secondary LCD will show “0.0 ºC“.

• Submerse the temperature probe in the vessel with ice and water as

near as possible to the reference thermometer. Allow a few seconds for

the probe to stabilize.

• Use the ARROW keys to set the reading on the secondary LCD to that

of ice and water, measured by the reference thermometer. When the

reading is stable and close to the selected calibration point, “READY”

tag will appear and “CFM” tag will blink.

• Press CFM to confirm. The secondary LCD will show “50.0 ºC“.

• Submerse the temperature probe in the second vessel as near as

possible to the reference thermometer. Allow a few seconds for the

probe to stabilize.

• Use the ARROW keys to set the reading on the secondary LCD to that

of the hot water.