Hello Crombes!
I am not sure what you are asking.
You mention the ISO spec for testing torque. Are you wanting to know the acceptance criteria within that specification? Or, are you interested in a specification other than that specification?
Standard specifications like that are usually pretty good ones to at least base your testing off of. Those procedures have been tested and validated. Other than that, you could test equipment against the manufacture specifications.
Again, sorry if this is not any help. Please feel free to post with more questions/information.