I read in an Omega Engineering app note that, whilst one might expect a new gauge to have maybe 1% variation in each 'arm', the 'offset' value typically changes considerably once the gauge is fixed in situ (with adhesive).
Assuming, for the sake of argument, a 1V exitation, what range of "potential divider voltages" would I expect to see in an un-stressed gauge?
If everything was ideal, I'd think expect exactly 0.5V, for instance 350R to +1V, 350R to 0V.
(I'd like to know how much range an offset nulling circuit should expect to cater for, basically).
My guess is I allow a trim of +/- 5mV per half-bridge, thus 10mV 'error' across a full bridge.