: Establishing the signal floor without the shield.
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The standard does not specify a calendar interval. However, ISO 17025 requires annual verification, and many accreditation bodies demand a full EN 50147-1 measurement every 12-24 months, or after any modification (e.g., changing a door gasket or adding a new feedthrough). : Establishing the signal floor without the shield
: The standard defines how to record reference measurements and calculate the actual attenuation (shielding effectiveness) provided by the enclosure. Typical Performance Requirements However, ISO 17025 requires annual verification, and many
To establish a common measurement procedure to validate shielding effectiveness (SE) —the ratio of the electromagnetic field strength outside the shield versus inside.
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