I have been posting questions regarding the AD620, reference voltge and output. I followed all the instructions from Stack Exchange and voila! The circuit works like charm, thank you! It gives the perfect instrumentation amplifier output.
Now coming to questions I have two questions:
The sensor I am using is a load cell and an extensometer. Now the sensor outputs at zero load or displacement are not exactly ZERO i.e. the difference between them is not zero and we get some error voltage. So to measure this voltage and get output w.r.t. zero (GND) I've added a pot assembly, so I just adjust the pot to zero and I get perfect output.
QUESTION: Can I replace the pot assembly with anything else? Is there an alternative ?
Now I am using AD620 to get output from the load cell and I am going to use an inverting amplifier to adjust the gain of the output.
QUESTION: Do I need to design a filter for better output stability? How do I do that? I don't have a DSO or a CRO?