Measurement Computing ADAC-LVi - Manual (Page 23)

Chapter 2 Easy Analog Input VIs
ADAC LabVIEW VI 17
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Clear Acquisition (true) Clear acquisition determines whether the VI releases the device
after reading the specified number of samples. The VI should pass a TRUE to this
parameter when reading the last set of samples for a given acquisition. The default is
TRUE, which means that the VI reads data only once if this input remains unwired. You
typically wire this input to the terminating condition of a loop, so that when the loop
finishes the device is released.
error in (no error) error in describes error conditions occurring before this VI executes.
This cluster defaults to no error.
Waveform Data Waveform Data is a two-dimensional array containing analog input
data in volts. The data appears in columns, where each column contains the data for a
single channel. The second (bottom) dimension selects the channel. The first (top)
dimension selects a single data point for that channel.
Actual Sample Period (sec) Actual Sample Period is the actual interval between
samples in seconds, which is the inverse of the actual sample rate in hertz. The actual
sample period can differ from the requested sample rate, depending on the clocking
capabilities of your selected device.
error out error out contains error information. If the error in cluster indicated an error,
the error out cluster contains the same information. Otherwise, error out describes the
error status of this VI.
ADAC AI Sample Channel
The ADAC AI Sample Channel VI performs an immediate, untimed acquisition on a
single channel and returns the data acquired in scaled data units (volts).
Board ID (0) Specifies the ADAC-LVi board ID number to be used in this acquisition.
The ID numbers are defined in the configuration file ADAC-LVi.con located in the
Windows main directory.