Gas gauge calibration unit

Thanks. The way I post these is to take a screenshot, then crop, scale, etc. Somehow, I've missed this. But this does not say that's what the gauge says, this says that's what the sender is "at the stops" So maybe the info I've got for what we might call "operationally empty" that is the actual reading the gauge "wants" might be in error when the float is actually indicating "tank empty".

I always assumed the figures I dug up was because somebody took apart the gauge test box. Boy would I love to get my hands on one of those, which is supposed to actually cause an empty / 1/2 and / full reading