Troubleshooting - VWR Bottle Top Dispenser Manual De Instrucciones

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Troubleshooting

Description of
the malfunction
Air bubbles in
the dispensing
cylinder
The dispensed
volume is too
low.
The dispensing
piston is sluggish.
The dispensing
cylinder can not be
filled.
Possible
reason
The dispensing
piston has been
pulled up too quickly.
The system has
not been vented.
The dispensing
piston has been
pulled up too
quickly.
The system has
not been vented.
There are impurities
in the intake tube.
There is conta-
mination between the of dispensing piston and
dispensing piston and dispensing cylinder.
the dispensing cylinder.
The PTFE-piston
(612-3669/3670)
is swollen.
The volume setting
system sits at the top. system to the desired
The intake tube
is missing.
Solution
Slowly and uniformly pulling
out and pressing down the
dispensing piston.
Repeated filling and
emptying the dispensing
cylinder.
Slowly and uniformly
pulling out and pressing
down the dispensing
piston.
Repeated filling and
emptying of the
dispensing cylinder.
Remove and clean the
intake tube.
Disassembly and cleaning
Disassembly of the
dispenser, put the PTFE
piston together with the
finger protection cap in the
freezer for a short time.
Check the dosing liquid,
solvents can only be dis-
612-4750/4751
pensed with
or 612-3671/3672.
Adjust the volume setting
volume.
Unscrew the dispenser
from the bottle and insert
the intake tube.
9–60

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