LVDT vs. Pressure Data Acquisition and Graph with DAQmx

[Curious_Mind]

Hi,

I am using Omega GP911-1-S gauging probe(https://www.omega.com/en-us/sensors-and-sensing-equipment/displacement/displacement-sensors/c/gaugin... and Omega LDX-3x transducer conditioner(https://assets.omega.com/manuals/M1633.pdf) with a Omega DP24-E- process meter (https://assets.omega.com/manuals/M1866.pdf).

But, I want to use the transducer (LVDTsensor) with NI myDAQ.  Can I do that with NI myDAQ? If possible, how can I make the hardware  connection? Also, if anyone has simple code for it, can you please share it here?

[Curious_Mind]

Hi,

I am using Omega GP911-1-S gauging probe(https://www.omega.com/en-us/sensors-and-sensing-equipment/displacement/displacement-sensors/c/gaugin... and Omega LDX-3x transducer conditioner(https://assets.omega.com/manuals/M1633.pdf) with a Omega DP24-E- process meter (https://assets.omega.com/manuals/M1866.pdf).

But, I want to use the transducer (LVDT) with NI myDAQ.  Can I do that with NI myDAQ? If possible, how can I make the hardware  connection? Also, if anyone has simple code for it, can you please share it here?

Thanks. 

[farshid_asadi · Accepted solution]

HI

As far as I checked, output of the first device is an analogue voltage. You can read this value through analog pins of myDAQ.
before connecting things together check the voltage range of the device. If it is not within range that myDAQ accept you need to level it.

[Curious_Mind]

Hi,

Thanks.

Just yesterday, I connected it with NI myDAQ.  I calibrated my transducer conditioner output to +-5v, and connected it to NI myDAQ in analog input( AI(+-10v level)), in channel 0+ and 0- (as I want to measure differential channel).

I checked the graph with measurement and automation explorer. I could see the change of voltage in graph.

[Curious_Mind]

The previous connection I mentioned, that showed a lot of fluctuation in voltage level. So, I connected the (-) terminal to ground which reduced the ripples and I got quite stable result

[farshid_asadi · Accepted solution]

Since we measure potential (voltage) based on a reference level (the ground), always when connecting electrical and electronic stuffs we need to connect their ground together, to have the same reference on all of them. Otherwise we may get different results than what we expect.