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10. Error messages (Error code)
Phenomenon Possible cause Dispositions
equipment failure Please inform the
maintainers for disposition
1. During the
calibration, the
buffer is over
5~50℃
2. The buffer can
not be identified.
1. Please adjust the buffer
temperature to the
appropriate temperature
range and make another
calibration.
2. Please change the buffer
or maintain and update
the electrode to make
another calibration.
The readout is
unstable
Please check whether there
is bubble or air in the glass
end of the electrode;
maintain the electrode or
change a new electrode, and
make another calibration.
The calibration
sequence is incorrect.
(Three-point
calibration)
Please calibrate in correct
sequence (from lowest pH
value to highest one, or
vice versa.) .
SLOPE value
exceeds the upper or
lower limit
Maintain the electrode or
change a new electrode, and
make another calibration.
OFFSET(zero-point
electric potential)
value≥60mv
Maintain the electrode or
change a new electrode, and
make another calibration.
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