pH 1970i
What to do if...
57
ba75690e01
01/2007
Obviously incorrect
measured values
Instrument does not
react to keystroke
Display
to
to
to
to
Sensor symbol flashes
Message
StoFull
StoFull
StoFull
StoFull
Cause
Remedy
pH electrode:
– pH electrode unsuitable
– Use suitable electrode
– Temperature difference
between buffer and test
sample too high
– Adjust temperature of buffers
or sample
– Measurement procedure not
suitable
– Follow special procedure
Cause
Remedy
– Operating condition undefined
or EMC load unallowed
– Processor reset:
Press the
<RCL>
and
<ON/OFF>
keys at the same
time and release them again.
The software version is
displayed.
Cause
Remedy
– Time-out of the interface
– Check the instrument
connected
Cause
Remedy
– Calibration interval expired
– Recalibrate the measuring
system
Cause
Remedy
– All memory locations are full
– Output data storage and clear
data storage
