Hi guys,
I am working on my project, relatively to control constant temperature and light intensity of a model house. For the temperature, I am using LM35CZ as sensor, LabVIEW 6i as my program, and DAQCard PCI6024E.
I encountered problem to configure the connection between my sensor and the DAQCard / LabVIEW.
I connected +5V from the card to the +Vs of the LM35CZ, and DGND to the sensor's GND. Then, the Vo of the sensor I connect it to analog input ACH0 (68). I also shorted AIGND (67) with the DGND to give reference to the analog input.
I look up the measurement in the test panel through my Measurement and Automation (MAX). With RSE, the reading is about 0.46 V at room temperature (~21 DegC). If I manipulate the sensor using a heat source, the voltage will drop as the temperature rise.
With NRSE, the reading in the test panel is about 1.6 V, whereas the output from the sensor itself still at 0.46 V. The output didnt change if I manipulate the sensor with heat source.
So, I cant really relate the reading to change the voltage output the the temperature. I believe the connection is right as per what I researched in the forum before.
What is wrong with my system?
Thanks.
