BUCHI KjelFlex K-360 - Manual (Page 42)

6 Operation
42 KjelFlex K-360 Operation Manual, Version C
6 .6 Instrument modes
The instrument has two different modes, Standby and Ready. In Ready mode the steam generator
heats continuously, so that a distillation can be started immediately. When the instrument is not oper-
ated for thirty minutes, it switches to Standby mode and stops heating to save electric power. When
it is switched back to Ready mode, it has to heat up first. You can see the icon “Process in progress”
(see position 3 in Fig. 6.8.3) flashing during heating.
Fig. 6.13: Standby mode
To switch from Standby to Ready mode, press Menu and subsequently Ready.
6 .7 System preparation
6 .7 .1 Preheating
The glass parts of the distillation system have to be preheated prior to analysis. Use a clean and
empty sample tube for this processing. It is recommended to perform a preheating, when the glass
(splash protector) has cooled down. The preheating time is predefined.
6 .7 .2 Priming
This preparation procedure includes distillation and titration with a clean and empty sample tube. It is
recommended to perform a priming at least once a day, before starting analysis. The priming method
can be modified.
6 .7 .3 Cleaning
At the end of a day, the system should be rinsed thoroughly by carrying out a cleaning. The splash
protector and the condenser are rinsed with water to remove sodium hydroxide residues. With regular
cleaning, the lifetime of the glass parts can be extended. The cleaning method is predefined, but can
be modified and adapted to the size of the sample tube.
6 .7 .4 Aspiration
With this procedure sample residue in the sample tube and titration residue in the receiving vessel can be
aspirated.