Somat eDAQlite, Руководство пользователя

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Somat eDAQ
lite
58 I2773-4.
4
en
There are also options provided to auto range the full-scale definitions based on the
minimum and maximum values reported for each channel for any given run. To use
this functionality, highlight the desired channels in the list box complete the following
control fields.
Range Multiplier %
Use the range multiplier to set some range padding on the auto range assignments. If
this parameter is set to 100%, the full-scale limits are set to the minimum and
maximum values acquired for the test run. The default value of 200% sets the full-scale
values so that the resulting full-scale range is double the range of the acquired data.
The minimum value is 10% which might be used if the acquired data exceeds the
original full-scale limits. If ensuing test runs are expected to be very consistent with the
trial test run used for auto ranging, it may be desirable to use a smaller padding value
(e.g., 125%).
Keep Original FS Means (kom)
Check this option to maintain the original full-scale mean values. This typically results
in a loss of dynamic range, but may be required for certain applications. The range
multiplier parameter is used as described above to ensure that sufficient padding is
provided on both ends of the full-scale definition.
Auto Set
Select the auto set option to apply the defined auto range parameters to the selected
set of channels. TCE updates the list box. This option can be used as often as
necessary to assign different subsets of channels different auto range parameters.
Save TCE Setup
Select this option to compute the new full-scale settings and save them in a new TCE
setup file. TCE asks for the save file name and issues a report after saving the file. The
report lists the new full-scale settings for each channel that has been auto ranged.
There are two situations where TCE overrides the user-defined auto range settings.
1. The hardware imposes limitations on most full-scale settings. For example, signal
conditioners that have voltage inputs are limited by the A/D converter range. TCE
automatically imposes these restrictions on any auto-ranged transducer channel.
2. TCE limits auto range changes that magnify the original full-scale range to be no
more than a factor of 1000. This is required to avoid numerical problems with data
channels where the minimum and maximum values acquired are the same or very
nearly the same.
NOTE
In some special situations, the same transducer or computed channel may be stored
in more than one Time History DataMode. In this case, TCE uses the first occurrence
(in relation to the definition order in the TCE setup file) of the duplicated channel for
display and auto range operations.
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