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Labjack with Ashcroft Pressure Transducer

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#1 Joe Oliphant

Joe Oliphant
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Posted 10 January 2014 - 05:14 PM

I have a U12 with two 10-36v input Ashcroft 0-5v output transducers connected to AI0 and AI1.  I have a 24v power supply powering them.


The U12 is giving totally random voltages; however, a volt meter between grnd and either AI0 or AI1 gives the correct voltage readings which change correctly as the pressure on the transducers change.


Any ideas?


The U12 seems fine as when you put a battery on either AI0 or Ai1, it reads fine.



#2 LabJack Support

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Posted 10 January 2014 - 05:27 PM

Can you provide a link to technical details for the transducers?


You probably need to connect the negative of your power supply (which I assume is the same as negative/common for the transducer signal) to U12 GND if you have not already.

#3 Joe Oliphant

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Posted 10 January 2014 - 05:50 PM

I posted too soon.  A jumper between the negative on the transducer power supply and Gnd gets it to work just fine.



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