constant offset which is added to/subtracted from the display value
GAIN
the display is multiplied by this factor
The display error can be corrected using the OFFSET and GAIN settings.
If the error is constant over the entire scale, add this error value to the O.CAL parameter
Example: the display indicates 2 / 102 whereas it should indicate 0 / 100. The correction O.CAL = -2.
If the error is not constant over the whole scale, the correction parameters O.CAL and G.CAL are calculated, taking the measurement at two points
(lower part (1) and upper part (2) of the scale), noting the current display indication value (D1, D2) and the correct theoretical value to be displayed (C1, C2)
Example: the display indicates 2 / 106 (D1=2 / D2=106) when it should indicate 0 / 100 (C1=0 /C2=100).