wtw pH 3300i Operating Manual page 55

pH 3300i/3400i
Obviously
incorrect
measured values
Instrument does
not react to
keystroke
to
Display
Probe symbol
flashes
Message StoFull
You would like to
know which
software version is
in the instrument
ba75682e02 03/2008
Cause
pH electrode:
– pH electrode unsuitable
– Temperature difference
between buffer and test sample
too high
– Measurement procedure not
suitable
Cause
– Operating condition undefined
or EMC load unallowed
Cause
– Time-out of the interface
Cause
– Calibration interval expired
Cause
– All memory locations are full
Cause
– e.g. question of the WTW
service department
Remedy
– Use suitable electrode
– Adjust temperature of buffers or
test samples
– Follow special procedure
Remedy
– Processor reset:
Press the <CAL> and
<ON/OFF> keys at the same time
and release them again. The
software version is displayed.
Remedy
– Check the instrument that is
connected
Remedy
– Recalibrate the measuring system
Remedy
– Output data storage and clear data
storage
Remedy
a
– Press the key and switch on
instrument. The software version
is displayed.
What to do if...
55