Category: EN standards

1 Scope This European Standard specifies the header frame dimensions of air filters for general ventilation to be used in air handling units, air intake system filters for rotary machinery and other applications. This includes pocket filters, rigid (V type) filters and filters to which header frame dimensions are applicable. 2 Normative references The following referenced documents are indispensable for […]

5 5.1 Apparatus and reagents Reagents 5.1.1 Ultrapure water distilled or deionised It is recommended that the water used should be obtained from a water purification system that delivers ultrapure water having a resistivity of 1 8,2 MΩ ·cm or greater at 25 °C. 5.1.2 Nitric acid (HNO 3 ), concentrated Density about 1 ,42 g/ml, mass fraction about 70 […]

1 Scope 1.1 This European Standard specifies the requirements for stationary electrostatic application equipment for ignitable liquid coating materials and for hard to ignite liquid coating materials to be used in explosive atmospheres generated by their own spray cloud. A distinction is made between spraying systems corresponding to EN 50050 and spraying systems designed for higher discharge energies and/or currents. […]

5 SCIF control signals 5.1 DC levels In a single coaxial cable distribution system, all controls issued by the receivers (demodulators) are done according to the DiSEqC format. The single coaxial cable distribution system is not backwards compatible with the former 13/18 V control associated with a continuous 22 kHz tone. The single coaxial cable distribution system is also not […]

1 Scope This European Standard specifies the requirements and tests to be fulfilled by the multipurpose insulating sticks intended to perform a range of operations in high voltage installations by means of the attached appropriate tools, for example: • connection and disconnection of disconnectors or other equipment operated by the stick, • fuse replacement with an attached tool,operations like: • […]

4 K factor Factor which defines an overload characteristic to which the fuse-link may be repeatedly subjected under specified motor starting conditions, and other specified motor-operating overloads, without deterioration. For the purpose of this specification, the value of K is chosen at 1 0 s. Unless otherwise stated by the fuse-link manufacturer, it is valid from 5 s to 60 […]

4 Minimum performance requirements 4.1 General a) (MSC.96(72)/A1 .1 /2) Devices to measure and indicate speed and distance are intended for general navigational and ship manoeuvring use. The minimum requirement is to provide information on the distance run and the forward speed of the ship through the water or over the ground. Additional information on ship’s motions other than in […]

1 Scope This International Standard is applicable to medical diagnostic ultrasonic equipment. – It provides a set of traceable acoustic parameters describing the acoustic fields. – It defines a standard means and format for the reporting of the acoustic output information. – It also describes a reduced dataset recommended for equipment generating low acoustic output levels. NOTE The information tabulated […]

1 Scope and object This International Standard provides a generic standard of electronic modules on which their sectional standards are based. This standard provides a definition, business model, interface between the trading partners,and related areas of standardization of electronic modules. In addition a generic set of test method is provided. 2 Normative references The following referenced documents are indispensable for […]

1 Scope The present document applies to radio equipment types for wireless access systems (WAS)/radio local area networks (RLAN) operating at multiple-gigabit data rates in the 60 GHz frequency range. These applications may also be referred to as Wireless Personal Area Network (WPAN) or Wireless Local Area Network (WLAN) systems and are intended for licence-exempt short-rangedevices. Economic benefits of this […]