Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge rela...
This document specifies methods of determining the stage?discharge relationship for gauging stations. It specifies an accuracy for defining the stage?discharge relationship based on a sufficient number of discharge measurements, complete with corresponding stage measurements.
This document considers stable and unstable channels and includes brief descriptions of the effects on the stage?discharge…
Flow Control Valves for Anhydrous Ammonia and LP-Gas
1 Scope
1.1 These minimum requirements cover the following types of anhydrous ammonia and liquefied
petroleum gas (LP-Gas) valves that are used to control the flow of liquid and/or vapor into and out of
containers, or in piping systems between containers, or between containers and utilization equipment, and
are for use at temperatures within the range of -40 °C (-40 °F) to 55 °C (130 °F):
a…
Soupapes de régulation de débit pour l’ammoniac anhydre et le gaz de pétrole liquéfié
1.1 Les présentes exigences minimales couvrent les types suivants de soupapes pour ammoniac
anhydre et de gaz de pétrole liquéfié (GPL) qui sont utilisées pour contrôler le débit de liquide et/ou de
vapeur dans et hors des conteneurs, ou dans les systèmes de tuyauterie entre les conteneurs, ou entre
les conteneurs et l’équipement d’utilisation, et sont destinées à être utilisées à des…
Utility-interconnected photovoltaic inverters - Test procedure for under voltage ride-through measur...
IEC TS 62910:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC TS 62910:2020 provides a test procedure for evaluating the performance of Under Voltage Ride-Through (UVRT)…
Medical electrical equipment - Part 1-9: General requirements for basic safety and essential perform...
IEC 60601-1-9:2007+A1:2013+A2:2020 The objective of this collateral standard is to improve the environmental impact for the entire range of medical electrical equipment, taking into account all stages of the product life cycle:
- product specification;
- design;
- manufacturing;
- sales, logistics, installation;
- use;
- end of life management. This means protecting the environment and…
Medical electrical equipment - Part 1-12: General requirements for basic safety and essential perfor...
IEC 60601-1-12:2014+A1:2020 constitutes a collateral standard to IEC 60601-1: Medical electrical equipment - Part 1: General requirements for basic safety and essential performance hereafter referred to as the general standard. Medical practice is increasingly using medical electrical equipment and medical electrical systems for monitoring, treatment or diagnosis of patients in the emergency…
Cards and security devices for personal identification — Test methods — Part 6: Contactless proximi...
The ISO/IEC 10373 series defines test methods for characteristics of identification cards according to the definition given in ISO/IEC 7810. Each test method is cross‑referenced to one or more base standards, which can be ISO/IEC 7810 or one or more of the supplementary standards that define the information storage technologies employed in identification card applications.
NOTE 1 Criteria for…
Cards and security devices for personal identification - Test methods - Part 6: Contactless proximi...
The ISO/IEC 10373 series defines test methods for characteristics of identification cards according to the definition given in ISO/IEC 7810. Each test method is cross‑referenced to one or more base standards, which can be ISO/IEC 7810 or one or more of the supplementary standards that define the information storage technologies employed in identification card applications.
NOTE 1 Criteria for…
Thermoplastics piping systems for underground non-pressure applications — Test method for leaktightn...
This document specifies a test method for determining the leaktightness of elastomeric sealing ring type joints for buried thermoplastics non-pressure piping systems.
Unless otherwise specified in the referring standard, the tests are carried out at the following basic test pressures:
— p1: internal negative air pressure (partial vacuum);
— p2: a low internal hydrostatic pressure;
—…
Junction boxes for photovoltaic modules - Safety requirements and tests
IEC 62790:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 62790:2020 describes safety requirements, constructional requirements and tests for junction boxes up to 1 500 V DC…
