Thanks for your reply.
Basically I have a sense resistor (0.156ohm) at an inverter output. I am using two probes to acquire voltage level before and after the sense resistor so that I can deduct one from another to get the voltage drop across the sense resistor. The objective is to find inverter output current. However, since I am getting only one decimal place, the two probes are giving something like 19.5V and 19.4V but this is not giving me proper voltage drop. According to my theoretical calculation, the inverter output current is 62mA, which means there should be 0.009672V drop across the sense resistor. I hope I could explain my problem to you.
Can you suggest any alternative to solve my problem?