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All the instruments are factory calibrated for temperature.
Hanna Instruments’ 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 local Hanna Instruments Office.
• Prepare a vessel containing ice and water and another one con-
taining 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 CAL & MEM keys,
then power on the instrument. The “CAL” message 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” message will appear and “CFM” message will
blink.
• To confirm press CFM. The secondary LCD will show “50.0 ºC”.
TEMPERATURE CALIBRATION
(for technical personnel only)
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