BUCHI KjelDigester K-449 - Manual (Page 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 – •