BUCHI KjelDigester K-449 - Manual (Page 56)

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8 Troubleshooting
KjelDigester K-446/K-449 Operation Manual
8.3 Faults
8.3.1 Broken sample tube during digestion
WARNING
Risk of burns from corrosives!
Serious injuries or death can result.
1. Observe all MSDS of the used chemicals.
2. Handle corrosives in well ventilated environments only.
3. Wear the personnel protective equipment.
WARNING
Risk of acid or toxic fume inhalation!
Serious injuries or death can result.
1. Run a Scrubber or water jet pump during a digestion and cool down time.
2. Close the fume hood as far as possible.
1. Abort the digestion by pressing the stop [STOP] button on the control panel.
2. Close the fume hood completely.
3. Wait until the heating block is cooled down.
4. Switch off the Scrubber.
5. Tilt up the suction module and place the drip tray underneath.
6. Remove the rack.
7. Remove residual bits of glass with a long forceps.
8. Remove the heating block cover and wash it.
9. Remove liquid from the heating block with a pipet.
NOTE
If liquid is flown into the insulation frame jack up the device (2 cm) on one side and collect the
liquid on the other side.
10. Clean the heating block with the use of a long forceps and paper towel.
NOTE
Use distilled water to remove residues.
11. Clean the surface below and around the KjelDigester.
NOTICE
Risk of sample tube damage.
The sample tubes can brake due to residues in the heating block holes.
1. Remove all residues (e.g. liquid, glass or crystals) from the heating block
holes before reusing the device.
12. Make sure that no residues (e.g. liquid, glass or crystals) are left in the heating block
holes.
13. Reinstall the heating block cover.