To measure the pressure using a pressure transducer that provides the analog current output 4mA-20mA

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  I use the NI9205 module to measure the pressure, but when I connect two transducers of pressure for the module in the CSR mode there is a decrease of output signal of the pressure sensor and when I dissconnect it the signal to return to the previous value, also when I use the differential mode after a few seconds the output signal turns into a 50 Hz oscillation , can you help me please?

  the pressure transducers are PDCR 4011, output 200mV and must provide of 10V and I use two similar power supply for transducers.

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• How the pressure transducer Validyne system-> Validyne CD280-Dual-> SCB - 68-> PCI-6024E-> LABVIEW works and how we can calibrate the pressure sensor?

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  I am completely new to LABVIEW software.

  I learn a LABVIEW code existing my pressure (attached) acquisition system which has the path of data as follows: pressure transducer Validyne--> Validyne CD280 - Dual--> SCB - 68--> PCI - 6024E--> LABVIEW and I have a few question:

  1. How does the complete system of the transducer to the LABVIEW work? That is, if we apply the pressure of the transducer, it will change the resistance of the probe then...?

  2. How can I find the equation that expresses the relationship between the pressure and the tension to the keys of the Validyne double-CD280 in the LABVIEW?

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• How to get mydaq recognize px309 pressure transducer % 3F

  It has only 3 wires instead of the usual 4. They are black, red and white and negative excitement, positive excitement and signal respectively. I plugged the black wires and red to an external power supply, the white wire to the myDAQ HAVE. Then I went to labview, opened DQA assisntant - acquisition - tension - ai1. Then I put samples of continuous get ot and drew a graphical indicator and press the run button. Yet, the only signal I get is noise and graph (amplitude time vs) shows no change when pressure is applied.

  Have you tried also runs the black wire from the transducer into one of the analog grounds on your MyDAQ? Measures data acquisition potential, without reference to ground the unit will not be able to measure anything.

  You can also use an output on the analog MyDAQ to produce the voltage instead of using an external power supply.

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• 6008 NI DAQ issues of reading pressure transducer

  Hello everyone, I am a new user of labeled and not one expert on electronics, so please bear with me.

  I'm trying to read a signal 4-20 my by a pressure transducer using a NI DAQ 6008 and Labview version 8.6. I am running Windows XP Professional. I'm the transducer, (http://www.omega.com/Pressure/pdf/PX01-I.pdf) providing a voltage of 10 v I have a 235 external resistance ohms between the terminals positive and negative data acquisition (although I am not sure that it is correct). At the start of my VI, I am able to measure a voltage of environ.9 data acquisition (verified by a voltmeter/ammeter) V and a current of environ.39 my.

  My problem is the fact that when I have a supply pressure of my sensor, I have not received any signal whatsoever by the transducer, despite the fact that it is important that the pressure should give me a signal. Is this a problem with my installation, connections, data acquisition (which has been reset in MAX number of times and pass the self-test) or the sensor itself?

  Thank you for your time and consideration

  Hi prenerk,

  You are right that resistance must be connected to the terminals positive and negative a way to HAVE to create a measured voltage to current.  Here are two troubleshooting steps you can try:

  1. check with an ammeter so you are detecting a change in the current when you apply pressure to the transducer.

  2. open the Explorer Measurement & Automation and use a Test Panel to measure the voltage of the device.  This will ensure that there is a mistake in your LabVIEW code.  Also check the MAX pinout diagram to see if your sons are correctly plugged into the channel of GOT it.

  If you have not discovered a problem with the above steps, we will have to learn more about your sensor pressure and how you connect it to the 6008.  We will need the information on the sons of the Omega instrument and how they are connected to the excitation voltage source and 6008.  Let us know how it goes!

  Brian

• Pressure transducer

  I received an omega pressure sensor (model px309) with only three wires: Red (power supply +); Black (power supply)-; and white for the signal.

  Should the output voltages of 0 to 5 and a voltage range from 9 to 30. It measures gage pressure.

  I use a power supply that can output 12v to provide power to transduce and a Ni-9205 to collect the signal.

  Red and black were connected to the power supply. The white one was hooked up to the ACH0 to collect the signal. In the test diifferential model, I used a wire to coneect to COM. ACH8 Also, I plugged the black wire pressure transduce to COM.

  Is this the right settings?

  I run my program and I found that the signal is not continuous, and it has a Variant. Please see attached picture.

  Is this normal?

  Hi Kang,

  Depending on what beach you go the DAQmx task for the 9205, looks like expected behavior.

  It seems that noise you see is on .1mV, which is quite close the specification of random noise for the NI 9205 module:http://www.ni.com/pdf/manuals/374188d.pdf#page=22

  If you select a range of 0-5 v for example, DAQmx will put the module mode +-5V, which corresponds to a 116 uVrms noise, that seems pretty close to what you see.

• Measure the current and voltage using DMM sharing a port

  I want to measure pressure several times on a pcb, where I connect the ports of digital multimeters to the card using simple cards. Switching between the different voltages is done using simple. If the black port of DMM (the second from the top photo) is connected to the Earth to give the measure correct volt.

  

  And then I want to measure current through different lines. The problem is here. Given that two measurement types share a port, how do I get the correct voltage and current measurement? The second port of top would be grounded, so I can't use the method of measuring the voltage across the line through a resistance with a known value, since then the second port must not be connected to the ground. How can I use the current state of the DMM measurement? How measure current? Are there examples of this? Tried looking through manuals, but could not find the good starting points.

  

  so I can't use the method of measuring the voltage across the line through a resistance with a known value, since then the second port must not be connected to the ground.

  On all of my games to test I have to mux my land of the signal along with the salvation of my signals.

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• simple pressure transducer

  Hello

  Does anyone have a pressure transducer with offset null simple vi constructed in code. I'm relatively new to labview and most of the examples I have seen are way to complex for me to understand what is happening.  Is it better to use the DAQmx Wizard or data acquisition?  I have two sensor of pressure (excitation omegadyne-10V) hung on to with a module for 1121 SCXI-1327. I wrote a program to convert mV to pressure using a linear scale, but that's all I know how to do at this point! And I want to know how to read the two transducers.  Thank you!

  Don't forget that you will need to change your excitement of inside out and remove the part with the shunt calibration.

• How to wire NI 9203 to Emerson PT5 pressure transducer

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  I started studying with 9188 OR cDAQ and analog input NI 9203 module. I'm really new on the DAQ hardware and I confused about my wiring for the NI 9203 pressure sensors. I want to use 6 pressure transducers whose output signals are ampere (4-20 my). In the manual operation of NI9203 shows that there is only 1 negative port (COM). Could I wire 1 more NI 9203 pressure sensors? If it is possible, how would I do that? The pressure transducers that I wanted to use a 2-wire and its technical specifications is Emerson PT5.

  Hello

  You should be able to branch out of the output of the power supply 24 VDC 8 drivers. Does that help?

  -Carisa