Calibration
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key to exit. If the user exits, the gain value accepted for the buffer is used for
both acid and base measurements.
6. Rinse the sensor cup three times with the third buffer solution.
7. Fill the sensor cups again with the same solution.
8. Push UP/MS or MR/DOWN until the display agrees with the buffer value.
9. Push the CAL/MCLR key to accept the third point of calibration. The calibration
procedure is now complete.
Note: Fill the pH/ORP sensor cup with pH storage solution and replace the protective sensor
cap when the meter is not in use. Do not allow the cup to dry.
4.11 ORP calibration
The ORP electrodes rarely give false readings unless there is a problem in the
reference electrode. For this reason, and because the calibration solutions for ORP
are highly reactive and potentially hazardous, the MP meter has an electronic ORP
calibration. This causes the zero point on the reference electrode to be set
whenever the pH 7 calibration is done.
4.12 Temperature calibration
Temperature calibration is not necessary in the MP series meters.
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