Metrohm 893 Professional Biodiesel Rancimat - Manual (Page 47)

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6 Troubleshooting
893 Professional Biodiesel Rancimat
￭￭￭￭￭￭￭￭ 39
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 Iso-Versinic ® tubing for blockage
and, if necessary, clean it.
￭ 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 Iso-Versinic ® 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 Iso-Versinic ® tubing is
connected to the tubing adapter that is
mounted 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.
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.