From the International Electrotechnical Commission webstore:
“IEC 61557-10:2013 specifies the requirements for combined measuring equipment which combines into one piece of apparatus, several measuring functions or methods of testing, measuring or monitoring according to the respective parts of IEC 61557.
This second edition cancels and replaces the first edition published in 2000.”
Equipment for Testing, Measuring and Monitoring of Protective Measures for Electrical Safety of Low Voltage Distribution Systems Up to 1,000 v.a.c. and 1,5000 v.d.c