Programming instructions

Chapter 21 Common SCXI Applications
LabVIEW Data Acquisition Basics Manual 21-12
© National Instruments Corporation
Figure 21-5 continually acquires data until an error occurs or you stop the
VI from executing. To perform a continuous hardware-timed acquisition,
you must set up a buffer. In this example, the buffer is 10 times the number
of points acquired for each channel. For each acquisition, your device
averages the temperature data. After completing the acquisition, always
clear the acquisition by using the AI Clear VI.
If you are not using the DAQ Channel Wizard, you must use the
RTD Conversion VI in addition to specifying additional input
parameters, as shown in Figure 21-6. The Convert RTD Reading VI, in
Functions»Data Acquisition»Signal Conditioning
, converts the voltage
read from the RTD to a temperature representation.
Note
You should only use the RTD conversion function in LabVIEW for platinum
RTDs. If you do not have a platinum RTD, the voltage-temperature relation will
be different, so the LabVIEW conversion function cannot be used.
Figure 21-6.
Measuring Temperature Using the Convert RTD Reading VI
Figure 21-6 continually acquires data until an error occurs or you stop
the VI from executing. In order to perform a continuous hardware-timed
acquisition, you need to set up a buffer. In this example, the buffer is