Low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 3. Loop impedance
State system for ensuring the uniformity of measurements. Radiometers of the extreme ultraviolet radiation for measurements of radiance with the high spatial distribution in the wavelength range 10-30 nm. Verification procedure
State system for ensuring the uniformity of measurements. State primary standard and state verification schedule for means of measuring electrical quality factor
