How to read a depth micrometer

[shopandmath]

I am having some problems attaching photos
To calibrate the depth micrometre
You adjust each rod (this can take some time)
If you are going to adjust a rod size in a vice there is a chance of bending the rod during celebration
Don’t do this with out help from some one who has experience
There are multiple different styles of rod heads
This example has a nut and 3 allen keys
thank you RexB
if this does not answer the question let me know
Ray