For a linear ADC, the output of ADC is composed of a offset and a value, input multiplied by a slop, i.e.
output = offset + slop * input.
where offset and slop are constant.
In calibration process, we must apply two inputs and then get two outpouts to find the "offset" and " slop". Given that, the MS colud exactly show the current voltage of battery via the current ADC output.[br]<p align=right><font color=red>+1 RD币</font></p>