State system for ensuring the uniformity of measurements. State verification schedule for means measuring air kerma, air kerma rate, exposure, exposure rate, ambient dose equivalent, directional dose equivalent and personal dose equivalent, ambient dose equivalent rate, directional dose equivalent rate and personal dose equivalent rate and energy flux of X-ray and gamma radiation
Electrical apparatus for explosive gas atmospheres. Part 18. Construction, tests and marking of type of protection encapsulation 'm' electrical apparatus
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Part 2. Insulation resistance
