DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
Page 47
© 1998-2003 DH Instruments, Inc .
Table 12. <Average Flow Data> Run Screen Fields
LABEL DESCRIPTION
Red/Green Circular
Display
molbox flow Ready/Not Ready indicator (see the molbox Operation and Maintenance
Manual, Ready/Not Ready Section). The circle is red when any molbox flow reading
during the averaging cycle was not ready and green when all molbox flow readings
were ready.
Reference Flow
Average flow measured by the reference over the last averaging cycle. To change the
display unit of measure, click the value and select the desired unit from the drop down list.
If the DUT Definition [Correction] tab specifies a density correction, the reference flow value is
corrected to express the flow that would be present at the DUT if the DUT were at its
normal operating conditions. This correction allows the reference flow and DUT
indication to be compared even though the DUT is not at its normal operating
conditions (see Section 8.5.3).
DUT Flow
Average flow measured by the DUT over the last averaging cycle. To change the display
unit of measure, click the value and select the desired unit from the drop down list.
DUT Output
Average DUT output over the last averaging cycle. This averaged output value is
used to calculate the average flow. The output unit is specified in the DUT Definition
(see Section 8.5.4).
Measured Set
Average measured DUT set point for DUTs that control flow with a voltage (V) or
current (mA) based set point unit. The Set Point DMM in the System Configuration is
the source of this data (see Section 10.2).
Min Flow
The minimum reference flow measured during the averaging interval.
Max Flow
The maximum reference flow measured during the averaging interval.
STD
The standard deviation of the reference flow values measured over the averaging period.
6.7.5 DATA GRID RUN SCREEN
In [Run Test] mode, while running tests, the <Data Grid> run screen is available to display
the list of points taken and data associated with each point. Every point up to the current
point in the current test cycle is displayed in this grid. The unit of measure for many columns
is specified in the corresponding column header. As with the other run screens, the grid
display is scalable. However, the individual grid columns do not automatically scale as the
borders of the grid display are scaled. Instead click and hold the separator border between
columns or rows and adjust the scale as desired. Spacing between columns is stored by
COMPASS for display consistency between runs.
As a test progresses, the current point is automatically highlighted and selected in the grid.
Use the options on the
[Tools] , [Options] , [Grid] tab to prevent the automatic selection of
the current test point (see Section 11.3). When automatic selection is on, if the grid is
scrolled to the top to view points taken earlier in the test, completion of a new point will force
the grid back to the last point.
The type of data and the ordering of data in the grid can be customized by using the [Tools] ,
[Options] , [Grid] tab (see Section 11.3). Any or all of the different data items logged during
a test can be displayed at run time in the <Data Grid> run screen. The order of points
logged in the Data File is not affected by the grid display. By default, COMPASS displays six
frequently used columns: <Reference Q DUT Cond> , <DUT Out> , <DUT Q> , <%Rdg
Error> , <%FS Error> , and <Status> . The [Data] , [View Data File] option always displays
all data columns in the embedded grid (see Section 12.2). View this display to get an idea of
how the grid would display if all test data were included in the grid during tests.