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mV CALIBRATION
(for technical personnel only)
All the instruments are factory calibrated for mV, EC 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.
mV CALIBRATION
• With the instrument off press and hold down the CHANNEL and
keys and then power on the instrument. The meter will enter mV
calibration mode.
A two point calibration can be performed at 0 mV and 1800 mV.
• Attach to the BNC connector a mV simulator with an accuracy of
±0.1 mV.
• Enter the calibration screen. Press mV function key.
• Set 0.0 mV on the simulator.
• When the reading is stable and close to the selected calibration
point, the Confirm function key is displayed.
• Press Confirm to confirm. The second calibration point of "1800 mV"
will be displayed.
• Set 1800.0 mV on the simulator.
• When the reading is stable and close to the selected calibration
point, the Confirm function key is displayed.
• Press Confirm to confirm. The instrument will restart and the
calibration will be memorized.
Notes: • If the reading is not close to the selected calibration point,
"Wrong" tag will blink. Verify calibration condition or contact
your vendor if you cannot calibrate.
• Press ESC in any moment of the calibration process. The
instrument will restart and no calibartion will be memorized.
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TEMPERATURE CALIBRATION
(for technical personnel only)
• Press CAL key on the pH range or on the EC range. The calibration
screen is displayed. Press Temp function key to enter the temperature
calibration mode. The temperature calibration is performed for the
current channel only. The calibration routine is the same for both
channels, so Ch1 calibration is presented next.
• Prepare a vessel containing ice and water and another one containing
hot water (at approximately 50 ºC or 122 ºF). 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. Connect the temperature probe or the EC
probe to the appropriate socket.
• Immerse the temperature probe or the EC 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 ARROW 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 close to the selected calibration point, the
Confirm function key is displayed.
• Press Confirm to confirm.
• The second expected calibrated point is displayed.
• Immerse the temperature probe into the second vessel as close as
possible to the reference thermometer. Allow a few seconds for the
probe to stabilize.
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