SensorDAQ User's Manual
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AI(1), and the ground or negative lead to the GND terminal.
Analog Output Wiring
The SensorDAQ has one AO channel that can generate an output from 0–5V. The
AO has an output current drive value of 5 mA. To connect loads to the SensorDAQ,
connect the positive lead of the load to the A0 terminal, and connect the ground lead
of the load to a GND terminal.
Digital I/O
In addition to supporting Vernier digital sensors, the SensorDAQ has four digital
lines, P0.<0..3>, which comprise the DIO port. GND is the ground-reference signal
for the DIO port. The default configuration of the SensorDAQ DIO ports is open
collector, allowing 5 V operation, with an onboard 4.7 k
Ω pull-up resistor. An
external, user-provided, pull-up resistor can be added to increase the source current
drive up to 8.5 mA limit per line.
Counter/Timer
SensorDAQ has a counter/timer that can be configured for pulse output, timing input,
event counting, or as a digital trigger.
For examples of how to use the screw terminal signals in LabVIEW, see Appendix A.
Sample Experiments (VIs) in LabVIEW
Sample experiments are provided as starting points for writing custom VIs. For
purposes of getting started, below are examples of the most basic features of
SensorDAQ. These include data collection with Vernier analog sensors, feedback and
control, and adjusting VIs.
Details about all the sample experiments are available in Appendix A.
Data Collection with Vernier Analog Sensors
Over 50 Vernier sensors are supported by SensorDAQ, which comes packaged with
the Vernier Voltage Probe. The following experiment uses that probe to test the voltage
of a 9 V battery.
For a complete list of supported Vernier sensors, see
http://www.vernier.com/probes/chart.html
1.
Open the example VI
“
AnalogInEx01_Ch1.vi” located in the Analog Channels
folder – Program Files\National
Instruments\LabVIEW\user.lib\SensorDAQ\EXAMPLES to launch LabVIEW. A
generic time graph will be displayed, along with instructions.
