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COMPASS



for molbox™ User’s Manual

Page 61

DH Instruments, Inc

same fashion as a test if any of the

<Control Toolbar>

data acquisition options are used. When a point

is taken all averaging and manual entry options follow the same rules as when a test is executed.
If support instrument data is not necessary, simply uncheck all options and press

[OK]

to close the display

and complete the initialization. After initialization,

COMPASS

automatically displays the

<molbox Output>

and

<Average>

run screens (see Sections 6.7.2, 6.7.4). If any support device was selected for output,

the

<DUT Output>

window can be accessed to view the output of the devices. Although no DUT is

specifically setup with this run mode, the support device data still displays on the

<DUT Output>

window.

Figure 36. <Run Mode Data Selector>

Form

Some

<Control Toolbar>

options will not be available for every molbox reference. In particular,

molboxes that do not have the MFC control option cannot use the

<Flow Control>

feature. molboxes

running embedded software lower than Ver. 4.00 cannot use the

<Purge>

<Leak Test>

functions.

Using any of the <Control Toolbar> automatic data logging options can result in very large data files.
These are files with significantly greater than 1000 data points. COMPASS was not intended to

manipulate such files. Lower performance PC’s will experience significant delays in generating reports

and plots of such data files. Therefore, it is not recommended to use the plotting and reporting

functions with very large data files. Instead, export the data file to a spread sheet application for
further analysis.

COMPASS

polls the molbox and responds to the toolbar options until the

<Abort>

button is pressed.

7.4 [RUN

DUT]

Use this feature to access the predefined settings specified in a DUT Definition (see Section 8) without
running a specific Test Definition. In this run mode,

COMPASS

provides all of the features of a test in an

easily accessible toolbar. The

<molbox Output>

<DUT Output>

<DUT/Ref Comparison>

and the

<Average>

run screens are all continuously updated with their respective information (see Section 6.7).

As this update progresses, the

<Control Toolbar>

is available for parameter changes and auxiliary functions

(see Section 6.6).

[Run DUT]

can be used in place of a Test Definition when the testing requirements of

a device cannot be easily automated by a Test Definition or when long term DUT data is desired.

This function requires the selection of a DUT Definition as part of the initialization process. If the DUT is
not set up as a controller (see Section 8.5.4), a flow control selection is also required. Flow control can
be manual, or a previously set up flow controller can be selected. The selected DUT must also have the
necessary support instruments configured in the System Configuration (see Section 10.2).

It is also possible to setup support devices to log data from. A dialog display (Figure 36) similar to the

<Data>

and

<Auxiliary>

options of the Test Definition allows selection of what data to log (see Sections

9.5.9 and 9.5.10). The DUT output, measured set point, pressure and temperature can be activated or