Particulate Systems HPVA Series, Operator'S Manual, Page: 50 / 124

Definitions of Fields in the System Windows HPVA Series Operator’s Manual
2-30 Mar 2011
Ambient Temp: Enter the temperature of the air in the laboratory in °C.
Hold: Enter the number of minutes the system will wait once the
sample RTD reaches the ambient temperature.

Evacuation Time Enter the number of minutes you wish to evacuate the sample
prior to running the free space routine.

Adsorbate Name Enter the name of the gas to be used for the experiment. It should
match the name under the
Adsorbate column on the Gases tab of
the Excel macro spreadsheet.

Gas Port Select the port (either 6 or 7) to which the adsorbate gas tank is
attached to the instrument.
If the adsorbate is a gas mixture, check Mixture .

Pressure Steps This table lists the pressures the sample holder will reach during
the experiment when the standard dosing mode is used.
To enter a pressure step, enter the pressure in bars in the Pressure
field, then click Add .
If you wish to delete a pressure step, click the step in the table,
then click
Delete .

Data Logging Interval This field enables you to specify how often data points are
collected either by time or by pressure.
Enter a number of minutes in the min field or a pressure in the
bars field.
This is typically set to every 2 minutes or whenever the system
pressure changes by 0.005 bars.

Port 1 through Port 4 Click Port 1 .

Measure FS Check this box if you wish to have a free space analysis conducted
prior to the isotherm experiment.

Ambient FS If the Measure FS box is not checked, enter the ambient free space
volume of the sample tube in this field.
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