Buchi DuMaster D-480 Manual de usuario descargar pdf (Pagina 44)

Operation Manual D-480 ©BÜCH Labortechnik AG

4 - Understanding the instrument and planning its use 44

I Mechanical sample insertion and O

dosing system

II Furnace area and reaction zone

III Gas drying

IV Detector

Symbols

The following list names the functional and basic symbols:

Two-way valve Pressure sensor Gas separation

Three-way valve Loop Measuring cell

Check valve

Heated tube

Sensor

Throttle Drying Hose line

Flow controller Combustion Copper tube

Flow sensor Post combustion Reduction

Pressure contoller Actuator

Mechanical sample insertion and O

dosing system (I)

The following table describes the components of the unit and their functions:

Part

Name

Function

1 Carousel

 holds all samples in a series.

 transports the current sample into the ball valve

2 Ball valve with Ni flap

 allows the metered addition of O

during the combustion.

 holds the current sample.

 shuts the current sample off from the ambient air and

allows the system to displace any ambient air with a

gas mixture.

 transports the current sample into the combustion tube.

For details on sample insertion, cf. Sample insertion and initiation of measurement (on page 47).

Furnace area and reaction zone (II)

The following table describes the components of the unit and their functions:

Part

Name

Function

3 Furnace

 holds the combustion tube, reduction tube and post

combustion tube at a constant temperature and thereby

ensures reproducible analysis results.

4 Combustion tube with tube

filling

 Space for complete combustion of the sample including

combustion catalyst.

 Binds disturbing alkali and earth alkali elements.

5 Ash crucible

 Holds combustion residues and sample packing of

analyzed samples; for fast, easy emptying without

replacing the combustion tube.

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Buchi DuMaster D-480 Manual de usuario Pagina 44

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