> Hi group,
> I got a question on how to calibrate the precision adder.
> Any info welcome.
> Jacco

Step 1: adjustment of the internal 1V steps

adjust P2 so that the meter reads +1.00V, measured at the center pin of P2

Step 2: adjustment of the amplification

adjust P1 so that at the output appears +4.00V with all switches to "+"
position and Lev.1 control fully CW


Good luck
Dieter Doepfer