Professional video storage equipment. Guideline of time code transmission1 Scope This Technical Specification specifies the relationship between the reference signal and Ancillary Time Code (ATC) for use in professional storage equipment operating at 50 frames per second or 59,94 frames per second and handling progressive video signal under the system operation to maintain the frame pair which is composed of two frames.

1   This part of ISO 5658 specifies an intermediate-scale method of test for measuring the vertical spread (upward and downward) of flame over a specimen of a product orientated in the vertical position

BS EN 3475-303 is important for users because it helps improve the product quality and end-user satisfaction

BS EN 1642 is a level 2 standard and details requirements that apply to dental implants (for surgically implantable dental materials included within the definition of restorative materials see BS EN 1641)

This European Standard specifies the materials and the dimensional and performance requirements for straight concrete system chimneys for non-balanced flue applications comprising a concrete flue liner and a combination of compatible chimney components

with BS EN 12007-4 requirements

Principal contractors and sub-contractors

BS 4973-3 on specification for Interlinings is useful for:

This standard provides test methods for the determination of the particle size distribution of granulates and powders

accrediting bodies

the methods may also be used for the analysis of manufactured smokeless fuels other than coke made by a conventional process

BS EN 61442 includes multiple tests some of these include the AC/DC voltage test

Emergency service provider