Legal Removal Request

Post: I have been following Andrew Wedmore's blog re battery monitoring at https://offgriduk.net/2014/12/06/monitoring-the-battery-bank-part-1/.I am calibrating the Pi Plus with a set external voltage on the inputs via calculated external (200k) resistors for maximum 60V. Can anyone tell me the difference between using the various correction factors Andrew uses in his code and something like the following python code:# calibrate_voltage = 12.04V# raw_read = adc1.read_raw(input) if calibrate_voltage > 0: # as calibrate_voltage = raw_read * adc_multiplier then adc_multiplier = calibrate_voltage / raw_read factor[i] = adc_multiplier# factor[i] is then used to calibrate raw_readings for that adc channel [i]Andrew borrows and expands on AB electronics demo code:# following assumes 18 bit (which gives the 0.0000078125) and PGS gain of 1 (which gives the 0.48828125)# The 2.448579823702253 is a constant that is given without explanation in ABElectronics_ADCPi.pyrawToPiVoltageMultiplier = 2.448579823702253 * 0.0000078125 / 0.48828125 # translates the raw reading into the voltage seen by the ADCPi adcPIResistance = 16800 # the on-board resistance of each input in ohmsresistorRatio1 = (externalResistance1 + adcPIResistance) / adcPIResistancerawToFinalVoltageMultiplier = rawToPiVoltageMultiplier * resistorRatio1factor = [rawToFinalVoltageMultiplier * correction[0] # etc.I'd appreciate your comments on this, as I'm not sure if the added complexity provides more accuracy, etc.PS The Pi Plus was received from the UK to AUS in just over a week - congratulations on the fantastic service!