DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
Page 41
© 1998-2003 DH Instruments, Inc .
FEATURE DESCRIPTION
Log 1 point at
fixed intervals
Logs an instantaneous data point at fixed time intervals. When the icon is pressed,
an input box displays to allow entry of the time interval. Then
COMPASS will
automatically log a data point and repeatedly log data points until the <Abort Data
Acquisition> button is pressed or the run mode is closed. Taking data in this way
can be convenient when trying to monitor slowly evolving processes, i.e. the effect of
temperature on a DUT. Realize that taking data at short time intervals can result in a
very large data file.
The output of all manual entry devices must be entered for every data
point logged. This minimizes the automation provided by this function.
Average and log
points at fixed
intervals
Averages all device outputs and logs the results at fixed time intervals. When the
icon is pressed the
<Auto Point Average Setup> (see Figure 20) displays to allow
entry of the averaging time and the intervals between averages. Then COMPASS will
automatically begin averaging data. When the average is complete, the results are
logged and the countdown to the next average begins. When the time specified as
the
<Restart average every (s)> has been reached, another averaging cycle will
begin. This process is repeated until the <Abort Data Acquisition> button is
pressed or the run mode is closed. Taking data in this way can be convenient when
trying to mimic a test that includes multiple readings per point. Realize that taking
data at short time intervals can result in very large data file.
Press the [Abort Data Acquisition] option to abort fixed interval data
acquisition.
Figure 20. <Auto Point Average Setup>
Abort data
acquisition
Press this icon to abort data acquisition at fixed intervals or a point currently being
averaged.
Never use other <Control Toolbar> features when this icon is visible.
Changing the state of the system while a point is in progress leads to
faulty data logged in the data file.