I'm using the NI9237 in order to acquire signal coming from a strain gauge. We was using the quarter bridge configuration with a NI9949 adapter (R4=strain gauge; R3=resistor) but we had a bad wiring connection.
I was looking at the following topics
According to both whe had to perform the firs connection, while we performed the second one. In fact, Rs resistor (theoretically connected to 1 and 10) is flipped (look at the attached file).
According to the simplified scheme of NI9237 the Rs is just a resistor in parallel with R3 so both circuit (the first correct one and the second wrong one) should be equivalent.
In real circuit is there any connection between pins 1 and 2 or 7 and 10? In other word, can I trust my output signal with flipped Rs connection?
Thanks you in advance
If I understand your question, it is "which ShuntCal pin should be connected to which side of the shunted resistor?" It won't matter which way you connect the shunt cal lines. The shunt cal switch is bidirectional and will conduct unnoticeably well either direction.