Infoteenus
17 METROLOOGIA JA MÕÕTMINE. FÜÜSIKALISED NÄHTUSED
Uued standardid
EVS-EN IEC 63305:2024
Underwater Acoustics - Calibration of acoustic wave vector receivers in the frequency range 5 Hz to 10 kHz
Käsitlusala:
IEC 63305:2024 specifies methods and procedures for calibration of vector receivers in the frequency range 5 Hz to 10 kHz, which are applicable to vector receivers based on the two different principles. In addition, it describes an absolute method of inertial vector receiver calibration in air using optical interferometry.
Usually, acoustic wave vector receivers are designed and constructed based on one of two principles. One is the sound pressure difference (gradient) principle. When measuring with this sensor, the vector receiver is rigidly fixed on a mount and supported in water. The other is the co-vibrating (inertial) principle. When measuring with this sensor, the vector receiver is suspended on a mount and supported in water in a non-rigid manner, which allows the vector receiver co-vibrate in the same direction as the sound particle in the sound wave field.
Many methods have been used to calibrate vector receivers, such as free-field calibration, calibration in standing wave tube and calibration in a travelling wave tube.
Usually, acoustic wave vector receivers are designed and constructed based on one of two principles. One is the sound pressure difference (gradient) principle. When measuring with this sensor, the vector receiver is rigidly fixed on a mount and supported in water. The other is the co-vibrating (inertial) principle. When measuring with this sensor, the vector receiver is suspended on a mount and supported in water in a non-rigid manner, which allows the vector receiver co-vibrate in the same direction as the sound particle in the sound wave field.
Many methods have been used to calibrate vector receivers, such as free-field calibration, calibration in standing wave tube and calibration in a travelling wave tube.
Alusdokumendid:
IEC 63305:2024; EN IEC 63305:2024
EVS-EN ISO 18183-1:2024
Geometrical product specifications (GPS) - Partition - Part 1: Vocabulary and basic concepts (ISO 18183-1:2024)
Käsitlusala:
This document defines the basic terms for partitioned features and establishes a framework for the fundamental procedures used in partition.
Alusdokumendid:
ISO 18183-1:2024; EN ISO 18183-1:2024
EVS-EN IEC 62836:2024
Measurement of internal electric field in insulating materials - Pressure wave propagation method
Käsitlusala:
IEC 62836:2024 provides an efficient and reliable procedure to test the internal electric field in the insulating materials used for high-voltage applications, by using the pressure wave propagation (PWP) method. It is suitable for a planar and coaxial geometry sample with homogeneous insulating materials of thickness larger or equal to 0,5 mm and an electric field higher than 1 kV/mm, but it is also dependent on the thickness of the sample and the pressure wave generator.
This first edition cancels and replaces IEC TS 62836 published in 2020.
This edition includes the following significant technical changes with respect to IEC TS 62836:
a) addition of Clause 12 for the measurement of space charge distribution in a planar sample;
b) addition of Clause 13 for coaxial geometry samples;
c) addition of Annex D with measurement examples for coaxial geometry samples;
d) addition of a Bibliography;
e) measurement examples for a planar sample have been moved from Clause 12 in IEC TS 62836 to Annex C.
This first edition cancels and replaces IEC TS 62836 published in 2020.
This edition includes the following significant technical changes with respect to IEC TS 62836:
a) addition of Clause 12 for the measurement of space charge distribution in a planar sample;
b) addition of Clause 13 for coaxial geometry samples;
c) addition of Annex D with measurement examples for coaxial geometry samples;
d) addition of a Bibliography;
e) measurement examples for a planar sample have been moved from Clause 12 in IEC TS 62836 to Annex C.
Alusdokumendid:
IEC 62836:2024; EN IEC 62836:2024
EVS-EN 60704-2-14:2013/A2:2024
Kodumajapidamises ja sarnastes oludes kasutatavad elektriseadmed. Katsenormid õhumüra määramiseks. Osa 2-14: Erinõuded külmikutele, külmkambritele ja sügavkülmutitele
Käsitlusala:
Amendment to EN 60704-2-14:2013
Alusdokumendid:
IEC 60704-2-14:2013/AMD2:2024; EN 60704-2-14:2013/A2:2024
ISO 19234:2024
Hydrometry — Low cost baffles to aid fish passage on triangular profile gauging weirs
Käsitlusala:
This document specifies how to integrate baffles to aid the passage of fish on the downstream face of triangular profile weirs that conform to ISO 4360 (including Crump weirs) and ISO 4377 (flat-V weirs).
Alusdokumendid:
Asendab:
ISO/TR 19234:2016
ISO 18183-1:2024
Geometrical product specifications (GPS) — Partition — Part 1: Vocabulary and basic concepts
Käsitlusala:
This document defines the basic terms for partitioned features and establishes a framework for the fundamental procedures used in partition.
Alusdokumendid:
IEC 62631-2-3:2024
Dielectric and resistive properties of solid insulating materials - Part 2-3: Relative permittivity and dissipation factor - Contact electrode method for insulating films - AC methods
Käsitlusala:
IEC 62631-2-3:2024 specifies the measuring technology and the test method for the relative permittivity and dielectric dissipation factor of thin single layer insulating polymer film without any additional metallization on the sample surface. The adaptive thickness range is approximately 10 μm to 100 μm. The proposed frequency is the power frequency (50 Hz or 60 Hz), and it is also suitable in the technical frequency range from 1 Hz to 1 MHz.
Alusdokumendid:
Asendatud standardid
ISO/TR 19234:2016
Hydrometry -- Low cost baffle solution to aid fish passage at triangular profile weirs that conform to ISO 4360
Käsitlusala:
ISO/TR 19234:2016 specifies the requirements for the integration of baffles on the downstream face of triangular profile flow measurement structures to aid the passage of fish.
Alusdokumendid:
Asendatud:
ISO 19234:2024
ISO 7863:1984
Height setting micrometers and riser blocks
Käsitlusala:
Specifies the characteristics of micrometers with a measuring capacity up to 600 mm and a minimum scale value not greater then 2 micrometer together with riser blocks up to 600 mm in height. Test methods for the accuracy of these instruments are given in annexes A and B for general infomation only.
Alusdokumendid:
Kavandid
prEN ISO 5459
Geometrical product specifications (GPS) - Geometrical tolerancing - Datums and datum systems (ISO/DIS 5459:2024)
Käsitlusala:
ISO 5459:2011 specifies terminology, rules and methodology for the indication and understanding of datums and datum systems in technical product documentation. It also provides explanations to assist the user in understanding the concepts involved.
ISO 5459:2011 defines the specification operator (see ISO 17450-2) used to establish a datum or datum system. The verification operator (see ISO 17450-2) can take different forms (physically or mathematically) and is not the subject of ISO 5459:2011.
The detailed rules for maximum and least material requirements for datums are given in ISO 2692.
ISO 5459:2011 defines the specification operator (see ISO 17450-2) used to establish a datum or datum system. The verification operator (see ISO 17450-2) can take different forms (physically or mathematically) and is not the subject of ISO 5459:2011.
The detailed rules for maximum and least material requirements for datums are given in ISO 2692.
Alusdokumendid:
ISO/FDIS 5459; prEN ISO 5459