BUCHI KjelDigester K-449 - Manual (Page 42)

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6 Operation
KjelDigester K-446/K-449 Operation Manual
WARNING
Risk of acid or toxic fume inhalation.
Serious injuries or death can result.
1. Always run the Scrubber or water jet pump during the digestion process.
2. Operate the Scrubber and KjelDigester only in a fume hood.
3. Close the fume hood door as far as possible.
8. Start the Scrubber (if not connected) or the water jet pump.
∙The device beeps 3 times before the lift starts moving down into heating position.
c Follow-on tasks
1. After the digestion process the rack will move automatically into the cooling position.
∙The LED [HEAT] flashes until the temperature of the heating block is below 60 °C.
∙The Scrubber keeps running until the cooling time is completed as defined in the
method.
2. Tilt up the suction module.
3. Place the drip tray between the suction module and the samples.
4. Press the start [START] button to repeat the same method or press stop [STOP] to
select another method.
6.8.3 Digestion process, delayed start
a Preliminary tasks
1. Connect the Scrubber to the K-449.
2. 5.5.5 Set the clock (K-449 only), (5–31).
3. 6.8.6 Select a method, (6–44).
4. 6.8.7 Set up a delayed start time, (6–44).
b Tasks
1. Press the start [START] button.
∙6.8.7 Set up a delayed start time, (6–44).
2. Place the sample tubes into the rack.
3. Pour the samples and reagents into the sample tubes.
4. Use glass caps for any unoccupied positions to close the suction circuit.
5. Fit the sample rack into the cooling position.
6. Remove the drip tray.
7. Tilt down the suction module onto the sample tubes.
8. Check if all the sealings of the suction module are fitting the sample tubes.
WARNING
Risk of acid or toxic fume inhalation.
Serious injuries or death can result.
1. Always run the Scrubber during the digestion process.
2. Operate the Scrubber and KjelDigester only in a fume hood.
3. Close the fume hood door as far as possible.
9. Make sure the Scrubber main switch is on and the cooling water is working.