G F M 4 0 0 S E R I E S U S E R M A N U A L
-Always carry out probe cleaning according to the cleaning instructions -Never
immerse probes in solvent
-Never blow probes through with compressed air
-Allow hot high temperature probes to cool slowly; never cool by plunging them in
cold water or the like.
Cleaning instructions
Vane probes
Instrument and probe must be switched off or disconnected prior to cleaning.
As the probes are highly sensitive measuring instruments, they must be cleaned
with very great care.
Fibres or other foreign bodies can be carefully removed with fine tweezers.
When doing so, take care not to bend or otherwise damage the vanes or the
spindle.
The adjustment of the bearing screws must never be changed. This can
result in erroneous measurements.
Never allow hard objects to contact rotating impellers!!!
Cleaning agents which extract the plasticizer from the plastic are never to be used
for plastic probes (practically all solvents!).
We recommend the following for cleaning the probes:
-running water
-soapy water
-pure benzene
Cleaning example:
1) Carefully swish the top part of the impeller back
and forth in clean, pure benzene for ca. 10 min. Then
swish the top part of the impeller back and forth in
clean kerosene for ca. 1 min. to relubricate the impeller
bearings.
If soapy water is used as a cleaning agent it is advisable
to wash out the soap solution thoroughly with distilled water before lubrication
with kerosene.
GFM400 Series 31 GFM400 Series User Manual
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