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jeanbat29
Posts: 8
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Problem of stability and precision measurement of voltage under MAX

Hello,

My goal: To acquire a voltage output by an LVDT.

The meter or using an agilent I have a measuring accuracy of the order of 5mV.

By cons, using two different cards: PCI 6013 or 6014 + CB68LP terminal and different ways (test on two different PCs):

The MAX test panels do not give me that accuracy of the order of 100mV! Therefore impossible to obtain sufficient accuracy with the LVDT.

Big noise, but where does it from??

Conf. Labview 2010, DAQmx 9.2.2

Help !!!!!

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SAMUEL_NIF
Posts: 382
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Re : Problem of stability and precision measurement of voltage under MAX

Hi,

And thank you for posting here.

 

Could you explain more your configuration?

What is your input configuration (NRSE, DIFF, GRSE) ?

 

You can take a look on this link :

groud loops and returns

 

Regards,

Samuel G.

Samuel G. | Application Engineer Team Leader
Certified LabVIEW Developer
National Instruments France


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Member
jeanbat29
Posts: 8
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Re : Problem of stability and precision measurement of voltage under MAX

Hi,

 

Thanks for your answer.

 

The Mode is : On demand

Input Configuration: Differential

 

I had a look to the group loops and returns but... with a simple multimeter I have a good accuracy at the wire at the output of the signal, with MAX...no!