How to properly use a Platform balance?

Question

I need steps on how you will properly use a platform balance because my teacher will test us if we really know how to use it properly and she will grade it! Please give me clean and nice steps :D

Answer 1

1. Check the zero balance

2. Place the unknown mass on the left Platform.

3. Move the large Poise on the lower Beam to the right until it reaches the first notch which will cause the right Platform to drop.

4. Move the large Poise back one notch, which will allow the right Platform to rise again.

5. Move the small Poise on the upper Beam to the right until the Balance is brought into equilibrium.

6. To determine the weight of the unknown mass, add the amounts indicated on the two Beams.

[ i'm not sure of the step no.1.hope this can help ]