Hanna Instruments HI 3512 - Manual (Page 28)

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The relative mV value calibration may be used to perform a single point
calibration with an ORP standard or remove the contribution of the
reference electrode to display mV equivalent to a SHE.
• Press
CAL when the instrument is in Relative mV measurement
mode. The relative mV value and the temperature values are
displayed.
• Use the ARROW keys if you want to change the displayed relative
mV value.
• Press Zero function key if you want Rel mV reading to be zero
(Relative mV offset equals the mV reading).
• When the reading is stable in mV range and the Relative mV offset
is inside the offset window (±2000 mV), the Confirm function key
is displayed .
• Press Confirm to confirm relative mV calibration. The instrument will
return to measurement mode.
• If the absolute mV reading is out of range or the Relative mV offset
is out of the offset window, “Wrong relative offset” message is
displayed.
Change the input value or the Relative mV value to complete the
calibration process.
Note: If a Rel mV offset calibration exists, CLR function key is
displayed. Press CLR if you want Rel mV offset to be 0.0 mV.
RELATIVE RELATIVE RELATIVE RELATIVE RELATIVE m m m m mV CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION