Metrohm 895 Professional PVC Thermomat - Manual (Page 38)

6.1 Problems
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895 Professional PVC Thermomat
6 Troubleshooting
6.1 Problems
Problem Cause Remedy
No air flow can be
detected in the mea-
suring vessel (it does
not bubble),
although an air flow
can be discerned in
the reaction vessel. The connection is blocked. ￭ Check the tubing connector on the reac-
tion vessel cover for blockage and, if neces-
sary, clean.
￭ Check the silicone tubing for blockage and,
if necessary, clean.
￭ Check the tubing adapter and the PTFE
cannula on the measuring vessel cover for
blockage and, if necessary, clean.
The connection is leaking. Check the silicone tubing for leakages and, if
necessary, replace.
The reaction vessel cover
does not sit correctly or
tightly enough. ￭ If the reaction vessel cover is oblique or not
completely mounted, press it all the way
down.
￭ If the reaction vessel cover is loose on the
reaction vessel despite correct assembly,
the cover has to be replaced.
The connection is wrongly
connected. ￭ Make sure that the PTFE cannula for air
supply is connected to the In opening of
the measuring vessel cover.
￭ Make sure that the silicone tubing is con-
nected to the tubing adapter that is moun-
ted on the In opening.
￭ Make sure that the reaction vessel is con-
nected to the measuring vessel that
belongs to the corresponding measuring
position.
The induction times
are not reproducible
for multiple determi-
nations. The reaction vessels used
are not clean. ￭ Clean the reaction vessels of particles (dust,
cardboard, etc.) with nitrogen before
weighing in the sample.
￭ Only use new, unused reaction vessels.
The reaction vessels used
are scratched on the
inside. Only use new, unused reaction vessels.