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28 MW105 & MW106 Portable Meters
"WRONG OLD POINTS INCONSISTENT" is displayed if there is
discrepancy between new calibration value and old value
recorded when calibrating with the same probe in a buffer
of the same value. Clear the previous calibration and calibrate
with fresh buffers. See Clear Calibration section for details.
"CLEAN ELEC" indicates poor electrode performance (the
offset is out of the accepted window, or the slope is under the
accepted lower limit). Clean the probe to improve response
time. See pH Electrode Conditioning and Maintenance for
details. Repeat calibration after cleaning.
"CHECK PROBE CHECK BUFFER" is displayed when the
electrode's slope exceeds the highest accepted slope limit.
Inspect the electrode and make sure the buffer solution is
fresh. Clean the probe to improve response time.
"BAD ELEC" is displayed when after cleaning, the electrode's
performance has not improved. Replace the probe.
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