Metrohm 873 Biodiesel Rancimat Manual - Manual (Page 167)

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873 Biodiesel Rancimat ￭￭￭￭￭￭￭￭ 159
6 Troubleshooting
6.1 Problems
Problem Cause Remedy
The pump is louder
than normal. The air flow is blocked some-
where before or after the
pump.
￭ Check dust filter (3- 20 ) and, if neces-
sary, replace.
￭ Check filter tube (4- 4 ) on the drying
flask cover for blockages and, if nec-
essary, free with a gentle tap.
￭ Examine FEP tubings (2- 6 ), (3- 13 ),
(3- 14 ) and (3- 17 ) for blockages and,
if necessary, replace.
Extra air is sucked in at some-
where else other than the dust
filter. There is a leak some-
where in the system before the
pump.
￭ Check FEP tubings (3- 13 ), (3- 14 ) and
(3- 17 ) for cracks, kinks etc. and
tighten. If necessary, replace.
￭ Place the drying flask cover (3- 10 )
correctly on the drying flask and screw
tight.
No air flow can be
detected in the reaction
vessel (it does not bub-
ble), although the
pump is running. The air supply is blocked.
￭ Remove FEP tubing (5- 1 ) from the
thread adapter (5- 3 ). A slight air flow
must be discerned here. If this is not
the case, please contact Metrohm
Service.
￭ Check FEP tubing (2- 6 ) for blockages.
If necessary, clean or replace.
￭ Check thread adapter (5- 3 ) and air
tube (5- 5 ) on the reaction vessel cover
for blockages. If necessary, clean or
replace.
The FEP tubing for the air sup-
ply is defective. Check FEP tubing (2- 6 ) for cracks, kinks
etc. If necessary, replace.
The FEP tubing for the air sup-
ply is not connected correctly. Tighten FEP tubing (2- 6 ) on both sides.
The air tube (5- 5 ) does not
immerse in the sample.
￭ Push reaction vessel cover (5- 8 ) down
as far as the limit stop.
￭ Use more sample.