DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
Page 75
© 1998-2003 DH Instruments, Inc .
Table 20. DUT Definition Editor, [Test] Tab Fields
FEATURE DESCRIPTION
Calibration Gas
(required drop
down list
selection)
This is the gas that is actually flowed through the reference and the DUT when the DUT
is tested. The value entered is used to determine the default
<K Factor> (see
immediately below). All molbox supported gases are selectable as calibration gases.
If a density correction is selected in the DUT Definition <Correction> tab, the calibration
gas is automatically set to the process gas and cannot be changed.
K Factor
(conditional
numeric entry
field)
This is the DUT’s gas conversion factor from the calibration gas to the process gas for
the particular manufacturer selected. DUTs that specify a density correction in the DUT
Definition
[Correction] tab do not use this field. The value is automatically updated if the
<Manufacturer> was set up using the <Process Gas Editor> and conversion
information is supported for the test gases (see Section 15).
Gas correction factors (K factors) are supplied by DUT manufacturers to allow
calibration of the DUT with a gas other than the process gas. Using incorrect gas
correction factors or failing to properly estimate the uncertainty on gas corrections
factors may lead to erroneous data. molbloc/molbox does not use gas correction
factors. For additional information, see the molbox Operation and Maintenance Manual
Sections concerning [K] and K factors.
Default Test
(optional entry
field)
Specifies the Test Definition (see Section 9) that is most commonly used to run this DUT.
When a DUT to run is selected in
[Run Test] , the Test Definition specified here is
automatically offered as the Test Definition to use (though a different test can be
selected). If test selection in test initialization is turned OFF (see Section 11.5),
the
<Default Test> will be used automatically. The association of a test with a DUT
makes it possible to assure that a DUT is always tested with the correct test procedure.
Click the field or press the
<Select> button to display the <Test Definition Selector>
(see Section 9.4). Highlight the desired Test Definition and press <OK> to select it.
Right click this field to remove the Test Definition entry.
8.5.7 [CONDITIONS] TAB
The DUT Definition [Conditions] tab is used to record information about the conditions under
which the DUT is normally tested. The information is included in the Data File when tests
are run. No calculations are performed using this
[Conditions] tab information and it has no
affect on COMPASS operation.
Table 21 provides information on the various [Conditions] tab selections.
Figure 44. DUT Definition Editor, [Conditions] Tab