Radiometer Analytical MeterLab PHM220 Mode D'emploi page 55

Message
TEMP TOO HIGH
REPEAT MEAS.
UNKNOWN BUFFER
REPEAT MEAS.
UNSTABLE SIGNAL
REPEAT MEAS.
ZERO pH ERROR
Warning: We accept no responsibility when using the PHM220 and
its peripheral devices under conditions that are not specified in
these operating instructions.
Error/Action
This error appears if a pH calibration is
carried out at a temperature above the
maximum temperature limit of the buffer.
Cool down the buffer solution or change the
buffer.
Check the temperature sensor.
Press to continue.
In AUTO calibration the buffer value is not
recognised.
Check that the buffer used is of the
selected type and that the solution is fresh.
Select your buffer in the Edit mode; refer to
page 33.
Check the electrode condition and
electrode connection. Press
The electrode signal has not stabilised
during calibration or sample measurement in
accordance with the stability settings in the
Edit mode; refer to page 33.
Press to continue.
In AUTO calibration the zero pH is less
than 5.8 or greater than 7.5.
In FIXED calibration the zero pH limits
entered in the Edit mode have been
exceeded. No data have been stored in the
GLP table.
Check whether the limits set in the Edit
mode are within the recommended range.
Check the buffers used, the electrode
condition and the electrode connection.
Press to continue.
Troubleshooting
to continue.
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