Loadcell excitation voltage

[Thunderhorse312]

Hi! I'm having a problem trying to determine the correct excitation voltage for my loadcell and i would like to know the most suitable excitation voltage for it. The wheatstone bridge I'm using has 4 750 ohm resistors, how do i find its excitation voltage without the manual? please help! thanks!

 

[skydiverc]

Normally you just provide a very stable 5.000 or 10.000 volts to the bridge and bring the outputs to a high gain differential amp(G=1000 or better).

 

[Plasmanator]

750 ohms is fairly high for a loadcell, so I suspect more than 5 volts.

But as Skydiver said, stability is much more important. If you are using a homebrew amplifier the excitation really isn't important as long as it's constant. Try 5 volts and see what the output is at near full load.

With a 750 ohm bridge 10 volts can't really hurt anything...