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mV AND TEMPERATURE CALIBRATION (for technical personnel only)
All the instruments are factory calibrated for mV and temperature.
Hanna’s temperature probes are interchangeable and no temperature calibration is needed when
they are replaced.
If the temperature or ORP measurements are inaccurate, calibration should be performed.
For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center, or
follow the instructions below.
ENTER CALIBRATION MODE
With the instrument off, press and hold down the / then power on the instrument. The calibra‑
tion screen is displayed. Press “T” functional key to enter the temperature calibration mode.
TEMPERATURE CALIBRATION
• Prepare a vessel containing ice and water and another one containing hot waterm (at
approximately 50 °C or 122 °F). Place insulation material around the vessels to minimize tem‑
perature changes.
• Use a calibrated thermometer with a resolution of 0.1 °C as a reference thermometer. Connect the
temperature probe to the appropriate socket.
• Immerse the temperature probe or the pH probe including temperature sensor into the vessel
with ice and water as close as possible to the reference thermometer. Allow a few seconds for
the probe to stabilize.
• Use the / keys to set the calibration point value to that of ice and water mixture, measured
by the reference thermometer. When the reading is stable and within range of the selected
calibration point, the CFM functional key is displayed.
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