I'm analyzing this circuit to condition a PT100.
I clearly understand what the circuit does, but the current flowing through R7 is very small and negligible.
So in theory it could be any value (generally from 1k to 100k), but I don't understand why the value should be 49.9k.
There is no information on why the value of R7 where said circuit is described.
Any suggestion or comment is welcome.
The circuit is described here: Precision Temperature Sensing with RTD Circuits