The traier is set up for travel, we keep most of our belongings on board throughout the camping season, Only thing missing is the duffel bags, and fridge food. The heaviest kitchen items sucj as bottled water were refilled on purpose before weighing.
I may very well be wrong but my understanding of why it was two passes instead of three was because of the three seperate pads. And the numbers dont add evenly because they area conglomerate of two sets of numbers. GCWR is 7940 + 5700lbs not the 6800 GVWR which includes the tongue weight on the truck.
The weights were obtained in the following two passes... First weight Truck on steer axel pad, nothing on Drive axel pad and trailer on trailer axel pad. 6800 lbs, 0lbs and 6980lbs with gross weight of 13780.
Second pass ... unhitched... Truck on first pad, hitch on second and trailer axels on third. 5700lbs, 1200lbs, 6740lbs with gross weight of 13640lbs.
The way it was explained to me. The first pass gave me the GVWR (6800lbs) and GCWR(13780). The second pass provided the tongue weight (1200) a GCWR (13640 - noted 140lb differential) and the trailer weight (13640 - 5700 = 7940).