I am working on an application to sense when some series connected switches operate. We've wired the shunt resistor, Rs, in parallel with the contacts and when they open, a voltage is seen at the Vout. When the contacts are closed, Rs is shorted. This measurement circuit works for us but we are failing the INA169A current shunt monitor. Sometimes Vout is stuck a zero volts, other times it seems that it is producing only half output. Is there an issue with shorting the Rs on this component?