Büchi Labortechnik AG
Help with faults | 11
Operation Manual K-365 Dist Line
95/106
Problem
Possible cause
Action
Poor repeatability
Air bubbles in titration system,
burette, tubes.
u
Tighten the connections.
u
Flush the tubing with titrant.
u
Refill burette.
Aspiration not working prop-
erly.
u
Check for leaks.
u
Tighten the connections.
Sample is inhomogeneous.
u
Homogenize the sample.
Sample weighing problems.
u
Use weighing boats (easy
sample transfer from
balance to sample tube).
u
Use anti-static equipment.
u
To decrease the degree of
error, keep the weighed
sample portion as high as
possible.
Incomplete digestion, diges-
tion time too short.
u
Choose digestion time
accordingly.
u
Check color of samples
during digestion.
ð
Solution should be
transparent by the end of
the digestion.
Stirrer is defective.
u
Clean the stirrer.
u
If necessary, replace the
stirrer.
Loose contact of the sensor ca-
bles.
u
Check the sensor cables.
11.3
Troubleshooting instrument
Problem
Possible cause
Action
The instrument
does not work
The installation site has no
power supply.
u
Check the power supply of
the installation site.
The instrument is not con-
nected to the power supply.
u
Connect the instrument to
the power supply. See
Chapter 5.2 "Establishing
electrical connections",
page 29
The power supply cable is de-
fect.
u
Replace the power supply
cable.
The fuse was triggered.
u
Reset the fuse
The switch is defect.
u
