Buchi DuMaster D-480, Operation Manual, Page: 138 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
7 - Using the instrument 138

Select the radio button next to "Reference run" and click
OK
. The carousel moves to zero
position.

Prepare the samples. Cf.
Sample preparation instructions
(on page 124).

Insert the samples on the carousel.

Enter the weight in [mg] in the sample view (text view) on the PC if it has not already been
transmitted online by the balance.

Enter the sample name (max. 32 characters) in the sample view (text view).

Select a suitable method. See Values for oxygen dosing.

Go through the measuring start checklist. See Checklist for real sample measurement.

Start the analysis process in the operating software:

Select
System > Auto run
to start a multiple-sample analysis.

Select
System > Single run
to start a single-sample analysis.

Once measurement is finished, evaluate the measurement.

Save the data or print them out. See
Data backup and printing
(on page 156).
Performing routine measuring work
Overview
This section provides information about

types of routine measuring work,

the purpose of routine measuring work,

and how to perform this routine measuring work depending on the mode.
Definitions
Routine measuring work comprises the following activities:

Determination of instrument blank values.

Instrument conditioning with conditioning samples.

Determination of daily factors.
Routine measuring work is performed at set intervals or on defined occasions before, during or after a
series of measurements with real samples.
Instrument blank values
Determination of the instrument blank value depends on your needs. The following overview shows
the type and purpose of the determination.
Purpose Sample Blank value Occasion
Checking gas-tightness none N after maintenance work
Blank value determination of
sample additives and packing
materials

Sample
additive

Packing
material
N to allow for sample additives or
packing material
For details on determining blank values, cf. Types of blank value determination and their settings.