Hanna Instruments HI 3512 - Manual (Page 58)

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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.
m m m m mV CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION
(for technical personnel only)