Buchi KjelFlex K-360 User Manual download pdf (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.

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Buchi KjelFlex K-360 User Manual Page 42