The following functions can used for tthe VFC_ADC:
get_adc_gain(), gag() gain from [0.25, 0.5, 1, 2, 5, 10] set_adc_gain(), sag() get_adc_offset(), gao() offset from [0 - 10V] set_adc_offset(), sao() set_adc_polarity(), sap() 0 (negative) or 1 (positive) get_adc_polarity()