Metrohm 914 pH / Conductometer - Manual (Page 74)

6.3 Restarting/resetting the instrument
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pH Meter/Conductometer
Problem Cause Remedy
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 can switch off the instrument using the following key combination
for approx. two seconds:
￭
＋
￭ The instrument can be switched on again.
NOTE
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.
CAUTION
User data
The user data will be irreversibly deleted.
You can reset the instrument with the following key combination during
startup: