DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
Page 159
© 1998-2003 DH Instruments, Inc .
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15.1 OVERVIEW
The Process Gas Editor is a separate application included with COMPASS that is used to create and
maintain information on the DUT manufacturer process gases available in the DUT Definition [Header]
tab (see Section 8.5.2). The goal of the application is to allow users to add and maintain a list of DUT
manufacturers with specific gas conversion factors (often called “K” factors) based on process gases and
gas blends. The gas conversion factor allows a DUT designed for a specific process gas to be calibrated
with a different calibration gas. Refer to the molbox Operation and Maintenance Manual,
[K] Section, for
more details on gas conversion factors.
The Process Gas Editor is automatically installed with COMPASS . The program can be run directly
from the COMPASS program group, or by using the [Tools], [Process Gas Editor] menu short cut.
All DUT manufacturer information created with the Process Gas Editor is stored and accessed by the
COMPASS main program. The information is used to automatically display gas conversion factors
appropriate for the DUT manufacturer, process gas and calibration gas selected in a DUT Definition.
DUT manufacturers that do not use or require K factors do not need the
Process Gas Editor . Instead,
select the <New Manufacturer> option in the <Manufacturer> list of the DUT Definition [Header] tab
(see Section 8.5.2). Manufacturers created in this way do not automatically display gas conversion factors.
When the program is active, select a manufacturer from the list or use the <Add> button to create a new
manufacturer. Select an existing gas by using the <Gas information for current manufacturer> field.
The gas name, symbol, surrogate and related K factor information will display in the appropriate spaces.
Edit the information as desired and press
<Record> to save the changes. Add new gases by first entering
the new gas text in the <Symbol> field. Then update the remaining gas information and again press
<Record> . When all changes are complete, press the <Save File> button to permanently store all changes.
Gas conversion factors, often called K factors, are used when a DUT cannot be tested with the gas
with which it is normally operated. K factor definition and uncertainty are the responsibility of the DUT
manufacturer (see Section 15.1 and the molbox Operation and Maintenance Manual, [ K ] Section).