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