Information technology - Small Computer System Interface (SCSI) - Part 262: SAS Protocol Layer - 2 (...
ISO/IEC 14776-262:2017(E) This standards defines the model and command set extensions to be used in conjunction with the SCSI Primary Command Set Standard - 4 (SPC-4) to facilitate operation of SCSI direct-access block devices (e.g. hard disk drives).
Optical fibres - Part 2-70: Product specifications - Sectional specification for polarization-mainta...
IEC 60793-2-70: 2017 This part of IEC 60793 is applicable to optical fibre types D1, D2, D3, as described in <!--[if supportFields]><span
lang=EN-GB><span style='mso-element:field-begin'></span><span
style='mso-spacerun:yes'> </span>REF _Ref459118742 \h<span
style='mso-spacerun:yes'> </span>\* MERGEFORMAT <span…
Optical fibres - Part 1-61: Measurement methods and test procedures - Polarization crosstalk
IEC 60793-1-61: 2017 establishes uniform requirements for measuring the polarization crosstalk of polarization-maintaining (PM) fibres. This document gives two methods for measuring the polarization crosstalk of PM fibres. Method A is the power ratio method, which uses the maximum and minimum values of output power at a specified wavelength, and Method B is the in-line method, which uses an…
Optical fibres - Part 1-60: Measurement methods and test procedures - Beat length
IEC 60793-1-60:2017 defines test methods for both the phase beat length, and the group beat length. These two parameters are defined differently, and will give different results depending on the type of polarization-maintaining (PM) fibre. The phase beat length is the relevant parameter for the fibres ability to maintain a high extinction ratio. This is described in more details in Annexes A and…
Optical fibres - Part 1-60: Measurement methods and test procedures - Beat length
IEC 60793-1-60:2017 defines test methods for both the phase beat length, and the group beat length. These two parameters are defined differently, and will give different results depending on the type of polarization-maintaining (PM) fibre. The phase beat length is the relevant parameter for the fibres ability to maintain a high extinction ratio. This is described in more details in Annexes A and…
Optical fibres - Part 2-70: Product specifications - Sectional specification for polarization-mainta...
IEC 60793-2-70: 2017 This part of IEC 60793 is applicable to optical fibre types D1, D2, D3, as described in Table 1. These fibres are polarization-maintaining fibre types, and are used or can be incorporated in information transmission equipment and optical fibre cable. These fibres are available for use in optical transport networks. Three types of requirements apply to these fibres:
- general…
Photovoltaic concentrators (CPV) - Performance testing - Part 3: Performance measurements and power ...
IEC 62670-3:2017 defines measurement procedures and instrumentation for determining concentrator photovoltaic performance at concentrator standard operating conditions (CSOC) and concentrator standard test conditions (CSTC), defined in IEC 62670-1, including power ratings.
IEC 60034-18-42:2017 defines criteria for assessing the insulation system of stator/rotor windings of single or polyphase AC machines which are subjected to repetitive impulse voltages, such as those generated by pulse width modulation (PWM) converters, and are expected to experience and withstand partial discharge activity during service. It specifies electrical qualification tests on…
Optical fibres - Part 1-61: Measurement methods and test procedures - Polarization crosstalk
IEC 60793-1-61: 2017 establishes uniform requirements for measuring the polarization crosstalk of polarization-maintaining (PM) fibres. This document gives two methods for measuring the polarization crosstalk of PM fibres. Method A is the power ratio method, which uses the maximum and minimum values of output power at a specified wavelength, and Method B is the in-line method, which uses an…
Leather — Chemical determination of chromium(VI) content in leather — Part 2: Chromatographic method
ISO 17075-2:2017 specifies a method for determining chromium(VI) in solutions leached from leather under defined conditions. The method described is suitable to quantify the chromium(VI) content in leathers down to 3 mg/kg.
ISO 17075-2:2017 is applicable to all leather types.
The results obtained from this method are strictly dependent on the extraction conditions. Results obtained by using other…
