Hi Nadja,
not quite sure what you need.
If you 'Google' the EMS, the first hit gives you a link for a download of the scale including instructions (CSP website).
Is this not sufficient? It is a rather easy scale to use.
What is SOP? Standard Operating Procedure? = outcome measure? What is it that you would like to measure - can you give us more specifics?
Cheers,
Fyzzio