I am trying to simulate a full bridge sensor load cell.

Above is the reff circuit I am using. I know that making a bridge circuit like this one below would work, but I am not able to get the potentiomenter to get the bridge slightly unbalanced (0.1%) so that I can measure a 25mV/volt generated in signal + and signal-.

I built the above circuit, but I didn't have 3.3M in 1/2 watt. I think for this reason changing R5 for the full span is giving just 5mv/volt output. The excitation voltage is 5volt.

Can anyone help me generate 25mv/volt output from the circuit?