Are the “digital minimum” and “digital maximum” values hints or strict limits?
The specs say “The digital minimum and maximum of each signal should specify the extreme values that can occur in the data records.” Note the word “can”. It is not necessary that these values actually DO occur. So take safe values that you know the signal will not exceed, for instance the range of the ADC. Note that “The physical (usually also physiological) minimum and maximum of this signal should correspond to these digital extremes”. This correspondence is necessary for assessing gain and offset of the signal.
