BUCHI KjelSampler K-377 - Manual (Page 140)

7 Maintenance
140 K-375/376/377 Operation Manual, Version B
NOTICE
Risk of device damage.
• When removing and reinstalling the seal, make sure not to damage it.
• Always move it perpendicularly to the axis of the glass parts and ensure no damage occurs
to the sealing lip.
• Never apply grease to the seal and never touch it with sharp objects, otherwise it will get
damaged.
7 .7 .5 Glass parts
Replace the sample tubes and the condenser if broken. In case a KjelSampler K-376/K-377 is used,
the 500 mL tube, used for all distillations, should be replaced whenever a new splash protector is
mounted to the K-375.
7 .7 .6 Troubleshooting the dosing unit
If the dosing unit is blocked, this may be caused by the valve disc and the distributor disc adhering to
one another. In this case cleaning of both discs may solve the problem.
For the disassembly of the dosing unit refer to chapter “3.7 Disassembling the dosing unit” in the
manual of the dosing unit which is supplied together with the K-375.
Cleaning of the valve disc and the distributor disc is described in chapter “4.1.2 Cleaning valve disc
and distributor disc”, remedying the adherence of both is explained in chapter “4.1.3 Discs adhere to
one another”.
7 .7 .7 Adjusting the sample tube holder
In case the K-375 does not detect the sample tube, displaying ther error message “10102 No
sample tube present” or if leaks are observed, the sample tube holder needs to be adjusted.
To adjust the sample tube holder, the adjustment gauge 11059802 is needed:
Fig. 7.3 Gauge 11059802 for adjustment of the sample tube holder
① Step 1 for elder, worn splash protector seals ③ Step 3 for new splash protector seals
② Step 2 for little used splash protector seals