The conversion formula the VI uses is based solely on the bridge configuration. The following illustrations show the seven bridge configurations you can use and the corresponding formulas. For all bridge configurations, the VI uses the following formula to obtain Vr.

Vr= (Vsg – Vinit) / Vex

In the circuit diagrams, VOUT is the voltage you measure and pass to the conversion VI as the Vsg. In the quarter-bridge and half-bridge configurations, R1 and R2 are dummy resistors that are not directly incorporated into the conversion formula.

The following illustrations show the available bridge-completion networks.