strain measurement

[kort]

Hello Guys,

 I am very new in Labview and measurement technics, and now i have some problem with configuration of our devices. I would like to measure force and displacement this  stuffs:

load cell: KM500k 50N, pls see attached data sheets (load cell.pdf)

linear transducer SPI18 (linear_transducer.pdf)

Available NI devicer for us:

NI cDAQ 9172

NI 9219

USB 6009

LabView 9.01

It was suceed to measure resistance with usb 6009 in linear transducer which i could transform to displacement, but the configuration of load cells was not sucessful.

My queastions are:

how can i measure force with these devices?

If i know well ni 9219 modul contain measurement bridge which is necessary in strain measurement (load cell works as a foil strain gage, connection type:full bridge) but doesn't support external amplifier for load cell (Recommended Excitation 10VDCtyp./15VDcmax).

Can i somehow configure this load cell with usb 6009 and ni 9219 modul and an external supplier that will be good?

I appreciate every idea.

Thank you for your attention!

Attila B.

[Zody]

Hello,

In first of all, according to the technical specifications for NI 9219, the maximum excitation that can be provided is 2.5V.

Indeed you can use 10V external excitation, but you also will have to adjust your scale of measurement. The steps to do that are described here.

Don't forget that you will have to calibrate the channles. The steps for that are descruibed here.

I hope these tips will help you in developing your application.

If you have any other questions related to this topic please post them here.

Ion Rosca