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State system of ensuring the uniformity of measurements. Superhigh frequency phasemeters and phaseshifters. Methods and means of verification

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State system for ensuring the uniformity of measurements. Certified reference materials for metrological maintenance of pipeline non-destructive testing equipment. General requirements

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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Part 4. Resistance of earth connection and equipotential bonding

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Electromagnetic compatibility. Industrial, scientific and medical equipment. Radio-frequency disturbance characteristics. Norms and methods of measurement

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Safety in emergencies. Monitoring and forecasting. Basic provisions

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Safety of power transformers, power supplies, reactors and similar products. Part 2-15. Particular requirements and tests for isolating transformers for the supply of medical locations

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