Decagon AQUA LAB VSA Schnellstart-Handbuch - Seite 7

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• Ensure sample temperature is within 4 °C of chamber

temperature.

4. Starting a Test—

• Before starting a test, set the Volatiles: Yes/No option in

the configuration menu. If your sample has volatiles,

select "Yes" otherwise select "No".

• On the main screen, select the test wizard .

• Following several warnings, begin configuring the test by

providing a name for the test using the arrow keys

and then press . (The name of a previous test will appear

by default.)

• Enter initial moisture content if known (optional). Press to

continue or to go back.

• Setup each stage of the isotherm test. A stage is used to

adjust the isotherm settings for an individual sample (up to

20 stages). Each stage is setup with the isotherm method

(DDI or DVS) and the settings for that portion of the

isotherm. Once a stage is created, it can be modified or

deleted anytime before the test is started.

i.e. For milk powder, Stage 1 could use the DDI method to

ramp quickly from 0.1 to 0.4

DVS method to step from 0.4 to 0.8

increments.

• To setup a new stage, select "new" and press . A screen

with several parameters will appear. If a previous test

has been run, the stages for that test will be listed by

default. These stages can be used as-is or updated with new

settings. If you need to delete a stage, go to the specific

stage and press . Scroll down to the bottom of the stage

settings select "Delete" and press .

• Select the isotherm method as either Dynamic Dew Point

Isotherm (DDI) or Dynamic Vapor Sorption (DVS). DDI

will create a dynamic isotherm and DVS will create a

static or equilibrium isotherm. The other choices will

adjust based on which method is selected.

V S A Q u i c k S t a r t G u i d e

and Stage 2 could use the

slowly in 0.05