Buchi KjelDigester K-449 Manual do Utilizador descarregar pdf (Página 24)

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4 Description of function

KjelDigester K-446/K-449 Operation Manual

4.5 Rack, cooling and heating position

Fig. 4.7 Cooling and heating position of the samples

a Rack in cooling position b Rack in heating position

In the cooling position the rack hangs over the heating block, the samples are not heated. In the

heating position the sample are lowered into the heating block for digestion.

For the KjelDigester K-446, the rack is moved between the two positions by hand, for the K-449

via the automatic lift.

4.6 Functionality comparison K-446/K-449

Function K-446 K-449

Scrubber control (on/off) • •

Temperature adjustment during digestion (method 0) • •

Overtemperature switch • •

Lift for rack (up/down) – •

Programmable methods – •

Backup battery for cooling and lift (power loss) – •

Delayed start time – •

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Buchi KjelDigester K-449 Manual do Utilizador Página 24