BUCHI KjelDigester K-449 - Manual (Page 49)

7 – 49 Operation Manual KjelDigester K-446/K-449
7 Maintenance
7.2.2 Scrubber hose, cleaning
1. Disconnect the Scrubber hose on the both ends (Scrubber and KjelDigester).
2. Carry the hose with both openings showing upwards to prevent liquid to leak out.
3. Flush hose with hot water.
∙Use ethanol as a detergent for major contaminants.
4. Reconnect the hose on the Scrubber and KjelDigester.
7.2.3 Suction module sealing and spring, cleaning
a Preliminary tasks
1. Remove the suction module (7–54).
b Tasks
1. Put the suction module upside down in to a washing bath.
2. Clean the sealings and springs with water and a brush.
∙Use ethanol or soapy water as detergent for major contaminants.
3. Clean the suction tubes and the fume collection tube with detergent and a brush.
4. Flush the suction tubes and the fume collection tube with water.
5. Dry the sealings with a soft cloth.
NOTE
The complete suction module can also be cleaned in a laboratory dishwasher.
6. In case of a strong contaminant disassemble the suction module and clean the parts
in a ultrasonic bath.
c Follow-on tasks
1. Check the glass parts (8–58).
7.2.4 Sample tube, cleaning
NOTICE
Risk of sample tube damage.
Sample tubes can break due to mechanical or temperature shocks.
1. Do not cool down sample tubes with cold water.
2. Do not place hot sample tubes and the rack on a cold surface.
Single tube
1. Place the sample tubes into the dish washer.
2. Make sure the sample tubes are properly mounted in the dishwasher to prevent any
damage.
NOTE
Sample tubes with scratches or chips can break during a digestion.