you never add your bodyweight when recording lifts. It is, however, fine to do the following when listing and recording weights:
Chin-Ups: BW+10 x 8
You see BW stands for bodyweight, and you can go + or - depending on what you are doing. So, if you were to hang a 10lb plate from your belt, you would do BW+10, and if you used the assisted pull-up lever, and you counter weighted by 10lbs, it would be BW-10.
When I use dumbbells I try to signify by putting an "s" at the end. for example:
Dumbbell Hammer Curls: 30s x 10
The total weight is 70lbs, but the "s" at the end indicates plural, therefor I know later that I was using dumbbells. It is really not necessary because listed in the name of the exercise is "dumbbell", but I am anal retentive about recording my information.
Also, you might end up using a machine with pegs or smith machine, and some people add 45lbs as if they were adding the weight of the Olympic bar, but that is incorrect.