Buchi KjelSampler K-377 Manual do Utilizador descarregar pdf (Página 70)

6 Operation

K-375/376/377 Operation Manual, Version B

6.6.1 System Preparation

Within the area System Preparation all tasks related to the preparation of the system, like Preheating,

Priming, Cleaning, and Aspiration can be deﬁned and performed. In addition periodic tasks like elec-

trode or pump calibration and certain manual tasks related to burets, a sampler, or pH measurement

can be performed.

Preparative Tasks

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The System Preparation dialog is subdivided in two

sections:

Preparative Tasks

• Preheating

• Priming

• Cleaning

• Aspiration

Periodic Tasks

• Calibration pH Electrode

• Buret functions

• Pump Calibration

• Sampler functions

• Measuring pH or mV

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

glassware has cooled down. A status message on

the status view will inform the user if preheating is

required.

If an auto sampler is conﬁgured under “Settings”,

select either “Unit only” or “Via Sampler” for

“Preheating cycle”.

For “Unit only” only the glassware and tubing of the

K-375 device is heated up. With the option “Via

Sampler” also glassware and tubing of a connected

sampler can be included for the heat-up procedure.

The duration of the preheating procedure (“Distillation

time”) can not be changed.

Press START to start the preheating procedure.

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Buchi KjelSampler K-377 Manual do Utilizador Página 70