Metrohm 832 KF Thermoprep - Manual (Page 26)

7.1 Problems
22
832 KF Thermoprep, Troubleshooting
7 Troubleshooting
7.1 Problems
Problem Possible cause Remedy
Molecular sieve in the
drying bottles is used
up.
Replace molecular sieve. (If the
molecular sieve in the front bottle is
still OK then this bottle can be used
as the rear bottle. The "freshest“ mo-
lecular sieve belongs in the front bot-
tle.)
Condensate in the outlet
tubing. Dry the tubing. Reduce gas flow.
Possibly lower the temperature.
Gas flow too high. Reduce gas flow
Inhomogeneous
sample.
Reduce sample particle size before
weighing.
Not all the moisture has
been driven out.
Set "harder" switch-off conditions at
the titrator: Lower stop drift, increased
switch-off delay.
Titration results
widely scattered.
Leaky tubing connec-
tions.
Check tubing and replace if neces-
sary.
Molecular sieve in the
drying bottles is used
up.
Replace molecular sieve. (If the
molecular sieve in the front bottle is
still OK then this bottle can be used
as the rear bottle. The "freshest“ mo-
lecular sieve belongs in the front bot-
tle.)
Leaky titration vessel O-
rings. Replace O-rings.
Drift too high.
Leaky septum cap. Replace septum cap.
Titration time too
long. Inhomogeneous
sample. Reduce sample particle size before
weighing.