DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 40
When a data file is created in [Run DUT] and [Run molbox] run modes, data points can be taken
without the constraints of a test. The resultant data file is identical to files generated
with the [Run Test] option. Therefore, reports and plots can be created from the data file.
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.
Table 8 describes each of the data acquisition toolbar options in detail.
Table 8. <Control Toolbar> Data Acquisition Options
FEATURE DESCRIPTION
Create Data File Press this button to create a new data file. A standard windows filebox allows the
selection of the data file name and location. In
[Run molbox] run mode, the <Root
DUT data directory> is used as the default file location. However, any read/write
directory location is valid. [Run DUT] files use the same default naming convention
as tests (see Section 11.8). The file created is identical to files generated during tests.
Only 1 file can be active at a time. If a file is already open when this option is
selected, the file is first closed before the new file is created. Use an
<Initialization>
preference to determine whether or not COMPASS automatically prompts for the data
file during the initialization phase of the <Run molbox> and <Run DUT> run modes.
Log a single data
point
Logs the instantaneous output of all devices to the data file. This is identical in function
as using a 0 averaging time in a test. Any non automated devices must have their
output entered in the
<Enter Flow Data> window. If an auxiliary device is not setup
to auto poll (see Section 10.3.7), the device will be read prior to logging the point.
Average and take
1 point
Averages all devices for the specified averaging time then logs the averaged results as
a test point. This is identical to averaging data during a test. Both automatic and manual
averages can be used to average the data (see Section 9.5.4). An automatic average
is based purely on a time specified by the user. Manual averages allow the user to
tell
COMPASS when to start and stop averaging. When the <Control Toolbar> is
located horizontally in COMPASS (top or bottom of display), the averaging mode is
specified at the top of the drop down menu next to the average data icon. Use the
<Change Averaging Setup> option to select the type of averaging to use. If the
<Control Toolbar> is located vertically within COMPASS , the <Single Point Average
Setup> (Figure 19) automatically displays providing the option to change settings.
Figure 19. <Single Point Average Setup>