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mV CALIBRATION
(for technical personnel only)
All the instruments are factory calibrated for mV.
Hanna Instruments’ ORP electrodes are interchangeable and no mV
calibration is needed when they are replaced.
If the mV measurements are inaccurate, mV recalibration should be
performed.
For an accurate recalibration, contact your local Hanna Instruments Office.
A two‑point calibration can be performed at 0.0 mV and 1800.0 mV.
• Attach to the BNC connector a mV simulator with an accuracy of
±0.1 mV.
• With the instrument off, press and hold down the CAL & keys,
then power on the instrument. The “CAL” tag will appear and the
secondary LCD will show “0.0 mV“.
• Set 0.0 mV on the simulator.
When the reading is stable and close to the selected calibration point,
the “CFM” tag will blink.
• Press CFM to confirm. The secondary LCD will display “1800 mV“.
• Set 1800.0 mV on the simulator.
When the reading is stable and close to the selected calibration point,
the “CFM” tag will blink.
• Press CFM to confirm. The instrument will memorize calibration
and restart to measurement mode.
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 can not calibrate.
• Pressing CAL key during calibration process the instrument
quit calibration mode and restart to measurement mode without
memorizing calibration.
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