Standards World

IEC 60904-5:2011 pdf free download – Photovoltaic devices

IEC 60904-5:2011 pdf free download - Photovoltaic devices 1 scope and object This part of lEC 60904 describes the preferred method for determining the equivalent celltemperature (ECT) of PV devices (cells，modules and arrays of one type of...

02-10

ISO 12111:2011 pdf free download – Metallic materials一Fatigue testing一 Strain-controlled thermomechanical fatigue testing method

ISO 12111:2011 pdf free download - Metallic materials一Fatigue testing一 Strain-controlled thermomechanical fatigue testing method. 7.6.2.2 Method 1 The thermal strain is compensated by recording the free expansion thermal strains (specimen at zero force) as a function of...

02-10

IEC 61853-1:2011 pdf free download – Photovoltaic (PV) module performance testing and energy rating

IEC 61853-1:2011 pdf free download - Photovoltaic (PV) module performance testing and energy rating 1 Scope and object This part of lEC 61853 describes requirements for evaluating PV module performance interms of power (watts) rating over a...

02-10

ISO 12737:2010 pdf free download – Metallic materials一Determination of plane-strain fracture toughness

ISO 12737:2010 pdf free download - Metallic materials一Determination of plane-strain fracture toughness. 7 Test specimen size, configuration and preparation 7.1 Specimen size In order for a result to be considered valid according to this method, the specimen...

02-10

IEC 61000-6-3:2011 pdf free download – Electromagnetic compatibility (EMC)

IEC 61000-6-3:2011 pdf free download - Electromagnetic compatibility (EMC) 3.1.4 telecommunications/network port point of connection for voice,data and signalling transfers intended to interconnect widelydispersed systems via such means as direct connection to multi-user telecommunicationsnetworks (e.g. public switched...

02-10

ISO 11666:2010 pdf free download – Non-destructive testing of welds一 Ultrasonic testing一Acceptance levels

ISO 11666:2010 pdf free download - Non-destructive testing of welds一 Ultrasonic testing一Acceptance levels. ISO 11666 specifies ultrasonic acceptance levels 2 and 3 for full penetration welded joints in ferntic steels, which correspond to ISO 5817 quality levels...

02-10

IEC 62026-1:2000 pdf free download – Low-voltage switchgear and controlgear – Controller-device interfaces (CDls)

IEC 62026-1:2000 pdf free download - Low-voltage switchgear and controlgear - Controller-device interfaces (CDls) 1Scope This International Standard applies to interfaces between low-voltage switchgear,controlgear,and controllers (e.g. programmable controllers, personal computers, etc.). This standard does not apply to...

02-10

ISO 11609:2010 pdf free download – Dentistry一Dentifrices 一Requirements, test methods and marking

ISO 11609:2010 pdf free download - Dentistry一Dentifrices 一Requirements, test methods and marking. A.3.3.2.2 Preparation The entire labial surface of the specimen is used after removing the root. Clean the enamel in the same way as the root....

02-10

IEC 62023:2000 pdf free download – Structuring of technical informationand documentation

IEC 62023:2000 pdf free download - Structuring of technical informationand documentation 1 Scope This International Standard provides rules for the structuring of technical information anddocumentation，based on the use of a main document (le ading document) for the...

02-10

ISO 11452-11:2010 pdf free download – Road vehicles – Component test methods for electrical disturbances from narrowband radiated electromagnetic energy一 Part 11: Reverberation chamber

ISO 11452-11:2010 pdf free download - Road vehicles - Component test methods for electrical disturbances from narrowband radiated electromagnetic energy一 Part 11: Reverberation chamber. B.2 Measurement procedure Before starting the measurements for the chamber characterization, clear the...

02-10