I have a Pressure sensor ( Omega PX119 150GI) which outputs current in the Range of 4-20 mA and a measuring range of 0-150 psi. I also have a Compact DAQ with a USB serial port and an NI 9219 Universal DAQ. Could someone please let me know how to make the connections and measure the pressure using LabVIEW? I am fairly new to this topic and help would be much appreciated.
Thank you so much in Advance,
Solved! Go to Solution.
I am just consolidating the information from multiples sources
Your sensor specifies the pinout as highlighted below,
For each channel in NI 9129 DAQ, below is the pinout to connect a sensor in the current mode.
With these two pieces of information, you have to connect Sensor+ to HI and Sensor- to LO.
In order to use LabVIEW to collect data, use the below-highlighted example, (navigate to Help->Find Examples...)
Thank you so much for your reply.
I had a few doubts regarding configuring the sensor in LabVIEW.:
- When I choose current continuous sampling, How do I convert that signal into Pressure?
- When I choose a Pressure VI example, It asks for electrical units in volts. What should I give the values as since my sensor outputs current.
I have attached picture for both cases. Could you please help me out with this issue.
Thank you so much in advance,
Thank you so much for your help. I configured the sensors to work using NI 9219 DAQ.
Did your pressure sensor require a voltage supply?
I have a Hydrotechnik Pressure Sensor which requires a supply of 12-32VDC and gives an output of 0-10V. The supply is higher than the internal excitation voltage that the NI 9219 is capable of (and this is the only module I have easy access to) so I need an external power source.
I've seen on many forum posts that the NI 9219 can't handle external voltage excitation but is this just for bridge circuits? Since I just want to measure voltage do you know if my proposed setup work? I don't want to damage the hardware.
I'm new to this area so any help would be much appreciated!