BUCHI KjelDigester K-449 - Manual (Page 16)

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2 Safety
KjelDigester K-446/K-449 Operation Manual
WARNING
Risk of explosion and chemical burns!
Serious injuries or death can result.
1. Wear the personal protective equipment.
2. Make sure all components are in proper working condition.
3. Operate the device inside an active fume hood.
4. Follow the safety instructions in the application notes.
1. Use the user protection shield at any time during sample preparation and during
digestion (both H
2
O
2
and TKN).
∙User protection shield, installation, (5–32).
2. Use a suitable dosing device with tube to safely dose H
2
O
2
.
3. Preparation and digestion needs to be done within an active fume hood.
2.5.3 Personal protective equipment
Always wear personal protective equipment such as protective eye goggles, protective clothing
and gloves. The personal protective equipment must meet all requirements of all MSDS for the
chemicals used.
2.5.4 Built-in safety elements and measures
Glassware
All original BUCHI glass parts are made of high temperature, chemical resistant borosilicate glass
and optimal match the heating block.
Heating block
The heating block is equipped with a safety overtemperature switch. In case of a temperature
above 500 °C the heating block will be switched off and the KjelDigester starts a continuous
beeping sound.
Fume removal
Acid fumes generated during digestion accumulate in the suction module.
The fumes must be safely withdrawn from the suction module via a EPDM hose to a Scrubber
(e.g. Scrubber K-415) or via water jet pump into a sink with sufficient suction flow.
Lift (K-449)
The KjelDigester K-449 is equipped with a rechargeable battery. In case of a power failure the
lift moves up automatically.
Before the lift starts moving down automatically a beeping sound informs the operator.