Having been brought up in the age of analogue meters, I still refer to the maximum reading on a scale as the FULL SCALE DEFLECTION FSD. We were measuring the current through a resistor and got this reading. 1 significant figure is not good.
I changed to a FSD of 200mA and was rewarded with 3sf. The resolution was +-0.1mA.
To get a better resolution I could try the next FSD of 20mA. This should give more decimal places. Unfortunately FSD means the highest reading possible on the scale and since the reading was higher than 20mA, I got the display that means "off the scale".
