i am using HBM Data acquisition, with which i calibrate the hall voltage. The hall sensor needs supply voltage to activate which we can not get from this DAQ. Only output pin of the hall sensor is connected to DAQ and the +ve and gnd connection must be connected to the external power supply.
I think you are making your life hard by asking the same question in various threads again and again, with some new or different information here and there. Not too surprizing that you get different and unrelated answers from different contributors, but don't achieve much progress