pH
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8.4. WARNINGS & MESSAGES
y
“CALIBRATION EXPIRED” message is displayed when the meter is not calibrated or the
set calibration time-out has elapsed.
y
“WRONG BUFFER WRONG PROBE” message is displayed blinking during calibration
when the difference between the pH reading and selected buffer value is significant.
Check if correct calibration buffer has been used. Condition the probe following the
description in ELECTRODE CARE & MAINTENANCE section.
If necessary, change the buffer or the probe.
y
“WRONG BUFFER” and “Old” messages are displayed blinking during calibration when
an inconsistency between new and previous (old) calibration is detected.
Clear calibration parameters by pressing LOG/CLR and proceed with calibration
from the current calibration point (the instrument keeps all confirmed values during
current calibration).
y
“WRONG BUFFER” message and blinking temperature value are displayed during
calibration when buffer temperature is out of range. The calibration cannot be
confirmed.
Use fresh buffers for calibration.
y
When the measured value is out of range, the closest full-scale value is displayed
blinking in the first LCD line.
Recalibrate the meter.
Check if the sample is within measurable range.
