Hello

When i measure duty then all the readings are opposite.
Ignition on 30% not 70%, when i adjust richer % goes up and when leaner it goes down.
At 2500rpm when warm it rises 10% instead going down.
I set it at idle 50% and at 2500rpm 60%, car runs after that great, startup at cold and warm are better than ever.
Only at warmup procces it shows what it should, when lambda heats up, its around 35% and rises to 50%.
Any ideas?
E: If ill switch pins then wold be readouts correct except warmup periood.
E2: checked with volts, everything works correct, also warmup, i might have read warmup cycle wrong at first.
Found out some multimeters show duty cycle opposite.

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MB 300CE Turbo '88
MB 300E '86