Electrical Safety Analyzer

Good Evening Fellows, I need to ask about the subject analyzer if you have used it before. once the electrical safety test is completed in this analyzer it is automatically saved. When I view my results there are some letters like in Patient leakage current test ( E - R -) or ( - N R -), similarly in Patient leakage current test (Auxiliary) ( - N - -) and ( - - R -), also ( - - - - ) and ( E - - - ), last but not the least ( - - R - ) and ( - - R SR). My friends if anyone in the forum has used it before and he knows about these, kindly inform me. Regards, Bilal