About smart limits – MTS Series 793 Application User Manual

Page 342

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MTS MultiPurpose TestWare®

Trend Process

Data Acquisition Process Descriptions

342

Important hints

If your procedure runs for a long time, make sure the Windows virtual
memory paging file is large enough (MTS recommends 250 MB). To access
the Windows paging file controls: Start > Settings > Control Panels >
System

On the General tab, make sure the Trend process is enabled and the
Execute Process value is set to one. Because the Trend process parallels a
command process, it will run as long as the command process is executing.
However, it is possible to specify the Trend process’ run time within the
Trend process, as follows:

- Click the Monitoring tab.

- Specify a Time Interval.

- Select Send data once, then terminate.

Note

If you choose Send data continuously on the Monitoring tab, the
Trend process will not stop on its own, and therefore, will not repeat
according to the Execute Process value you enter on the General tab.

If you change limits during the procedure (using the Trend Monitoring
application) the new limits are transferred to MPT and are displayed in the
Signals tab in the MPT Trend Parameters window. Thus, if you store the
procedure after running, these settings will be saved as well.

For more information

See

“Data Destination”

on page 275.

About Smart Limits

If you press Reset and start the procedure over, Smart Limits will not be
calculated again.

If you change the Specimen, Smart Limits will be calculated again (even if
you load a previously run procedure).

As mentioned above, if you change limits during the procedure, the new
limits will be stored with the procedure if you decide to save the procedure
after a run. However, if Smart Limits are enabled when you save, they will
be calculated again at run time, thus effectively disabling the previously
saved limits. (You may decide you want to disable Smart Limits before
running the procedure.

Example

Suppose you want to run a sine wave for 20,000 cycles and you want trend to be
calculated every 1,000 cycles.

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