Which module to use with Endevco 8350C?

[ainmor]

Hello all,

It's been a couple of months that I try to connect an Endevco 8350C-100 pressure transducer to my NI cDAQ 9174 chasis . I've had used an NI9237 with no avail, since the common-mode voltage was out of range when outputing a 10V excitation. It was working at 5V excitation, but pressure readings were off by 10%. So I've decided to return it and try a more appropriate module.

The link to the pressure transducer: https://buy.endevco.com/8530c-pressure-27.html

I would really love your help and input as to which NI module to use with it.

Thanks,

Ariel.

[Andr3s_Br3n3s]

Hi Ainmor,

Thanks for the link to the Endevco 8350C.

The Currents models NI have for Strain and Bridge are NI-9237, 9236 ,9235 ,9219 ,9218.

The 9237 is the one that has 10 V excitation.

You can check in the datasheet the input noise http://www.ni.com/pdf/manuals/374186a_02.pdf

Did you try to calibrate the device using the Endevco and see if the error gets down?

[Henrik_Volkers · Accepted solution]

The output common voltage is outside the 4-6V (V_ex/2 +-1V) window?

That's bad. Well one could cheat (one small silveroxide batterie in each of the output lines shift the common mode voltage by 1.55V) .. however a recalibration at a lower bridge supply would be the way to go. 

How do you calibrate? Static or dynamic ?

(With dynamic calibration the pulse shape together with the 'low' samplerate can have unexpected results 😉 )