Somat eDAQlite, Руководство пользователя

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Somat eDAQ
lite
108 I2773-4.
4
en
6.1.2 Output Sample Rate
Output Sample Rate
Select the sample rate for the input channel. The sample rate options are factors of the
defined master sample rate (100 kHz or 98.04 kHz). The sample rate should be at
least two times the maximum frequency content of the input signal to ensure that the
bandwidth of the signal is completely characterized. When available, using a digital
filter can limit the frequency content of the input signal.
6.1.3 Full-Scale Values
Full-Scale Min and Max
Specify the expected extreme values for the transducer. When storing a 32-bit float in
a DataMode that uses an integer data type, the eDAQ
lite
uses the full-scale limits
when converting from the floating point format to the integer format. The eDAQ lite
also uses the full-scale estimates to set the default bin boundaries for histogram
DataModes and to set the scales for run-time displays.
Input channels on layers that have programmable gain and offset capabilities use the
full-scale values in conjunction with the calibration parameters to determine the gain
and offset values. The eDAQ
lite
provides some over range protection of 1% on
ELHLS and ELBRG channels. For example, specifying full-scale values of ±2000
microstrain on an ELHLS channel causes the eDAQ
lite
to set up the gain and offset
circuitry as close as possible to ±2020 microstrain without going under.
6.1.4 Output Data Type
Output Data Type
Depending on the channel type, the eDAQ
lite
provides several data type options.
When choosing the data type, consider factors such as data resolution, mass storage
consumption and what computed channels or DataModes use the channel as an
input. For a summary of the compatible data types for all computed channels and
DataModes, see
“Data Types” on page 191 .
NOTE
The Engineering Scaler computed channel generates a 32-bit floating point output
data stream from an integer type input channel. This permits storing data in an integer
format to minimize data storage consumption while still using the data in a computed
channel which requires a 32-bit floating point input data type. For more information on
the Engineering Scaler computed channel, see
“Engineering Scaler” on page 133 .
6.1.5 Calibration Table
The calibration area of parameters includes the fields necessary to set up a calibration
for an input transducer. Some transducer types have extra options not covered in this
section. For more information on calibrating transducers, see
“Calibrating Input
Channels” on page 63 .
Mode
Select the desired calibration mode.
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