Please, can anyone give me a detailed procedure on how to carryout meter proving on a 6" line prover loop with 6" Rothenberger sphere.
What kind of meter? Prove what? What's a Rothenberger sphere? Why 6" line?
I didn't get what you meant by Rothenberger Sphere (may a type of prover tank).
Are asking about volumetric prover tank method ?
Please read as "Are you asking about volumetric prover tank method ?"
Your question makes even less sense than the others.
You seen to have problems with all your instrumentation and how to make it work.
I suggest you enlist the help of the process engineer at your facility.
"Don't measure yourself by what you have accomplished, but by what you should have accomplished with your ability." -- John Wooden