BUCHI KjelSampler K-377 - Manual (Page 35)

4 Description of function
35 K-375/376/377 Operation Manual, Version B
4 .3 Standby function
Press the key READY to start heating the steam
generator.
Press the key STANDBY to stop heating the
steam generator.
Fig. 4.6: Status view
After 30 minutes without operation, the heating of the steam generator is automatically turned off.
In this case „Standby“ is displayed on the Status view.
To activate the device press the
READY key. The steam generator will need 120 seconds for heating
up to the operating temperature.
4 .4 System preparation
4 .4 .1 Preheating
The glass parts of the distillation system have to be preheated prior to analysis. This is done by
means of a clean and empty sample tube. It is recommended to perform a preheating, when the
glass (splash protector) has cooled down. The preheating time is predefined and can not be adapted.
4 .4 .2 Priming
Priming is used to prepare the entire system. 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.
4 .4 .3 Cleaning
At the end of a day, the system should be rinsed thoroughly by performing a cleaning procedure. 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.
4 .4 .4 Aspiration
With this procedure residues in the sample tube and in the receiving vessel can be aspirated.
For more details see also chapter “6.6.1 System preparation”.