Using ELT-400 mode "IEC/EN 62233", % value is obtained by comparing which levels?
STD MODE gives as an output the value in % as compared to the standard applied.
That is, if you set the ICNIRP limit on workers, the percentage is compared to its ICNIRP limit (obviously weighed) In this case, if you read 100% it means that you are on the limit, if you read 101% it means that you have exceeded 1% limit.