6.3 Restarting/resetting the instrument
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74
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912/913/914 Meter
Problem Cause Remedy
The sensor is defective. ￭ Replace the sensor.
The slope is insuffi-
cient during calibra-
tion.
The glass membrane or the
diaphragm is contami-
nated.
￭ Clean the electrode following the instruc-
tions in the leaflet.
No hydrated layer is pres-
ent on the glass membrane
after measurements in
water-free solutions.
￭ Hydrate the electrode between the meas-
urements.
The buffer solutions are not
OK.
￭ Replace the buffer solutions.
The sensor is "worn out". ￭ Replace the sensor.
6.3 Restarting/resetting the instrument
6.3.1 Instrument reset
In case of a malfunction, the instrument might not work correctly any-
more and not be switched off.
You need to press the following key combination for at least 2 seconds to
switch off the instrument:
＋
The instrument can be switched on again.
NOTICE
Data storage
The currently measured data and modified settings cannot be saved if
the instrument is reset.
6.3.2 Resetting the instrument to factory settings
This function deletes all user data on the instrument. Afterwards, the
instrument will be in the state as delivered from the manufacturer with the
default settings.
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