Metrohm 893 Professional Biodiesel Rancimat - Manual (Page 46)

6.1 Problems
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
38 ￭￭￭￭￭￭￭￭
893 Professional Biodiesel Rancimat
6 Troubleshooting
6.1 Problems
Problem Cause Remedy
The pump is louder
than normal. The air flow is blocked
somewhere before or after
the pump. ￭ Check dust filter and replace it if necessary.
￭ Check filter tube on the drying flask cap for
blockages and, if necessary, gently tap on
it to remove them.
￭ Examine the FEP tubing with regard to
blockages and replace it if necessary.
Extra air is aspirated from
elsewhere other than the
dust filter. There is a leak
somewhere in the system
before the pump. ￭ Check the FEP tubing for cracks, kinks, etc.
and fasten it tightly. Replace it if necessary.
￭ Place the drying flask cap correctly on the
drying flask and screw tight.
No air flow can be
detected in the reac-
tion vessel (it does
not bubble),
although the pump
is running. The air supply is blocked. ￭ Remove the FEP tubing from the thread
adapter. Here, a slight air flow must be
perceptible. If this is not the case, please
contact Metrohm Service.
￭ Check FEP tubing for blockages. If neces-
sary, clean or replace.
￭ Check the thread adapter and the air tube
on the reaction vessel cover for blockages.
If necessary, clean or replace.
The FEP tubing for the air
supply is defective. Check the FEP tubing for cracks, kinks etc. If
necessary, replace.
The FEP tubing for the air
supply is not connected
correctly. Tighten the FEP tubing on both sides.
The air tube does not
immerse in the sample. ￭ Press the reaction vessel cover all the way
down.
￭ Use more sample.