Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipmen...
This part of IEC 61557 specifies the requirements for insulation monitoring devices (IMD) which permanently monitor the insulation resistance to earth of unearthed IT a.c. systems, for IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1 000 V a.c., as well as of unearthed IT d.c. systems with voltages up to 1 500 V d.c. independent from the method of…
Information technology — MPEG audio technologies — Part 1: MPEG Surround
ISO/IEC 23003-1:2007 (MPEG Surround) is efficient technology for multi-channel audio compression. Rather than performing a discrete coding of the individual audio input channels, MPEG Surround captures the spatial image of a multi-channel audio signal into a compact set of parameters that are used to synthesize a high quality multi-channel representation from a transmitted downmix signal. MPEG…
Information technology - MPEG audio technologies - Part 1: MPEG Surround
ISO/IEC 23003-1:2007 (MPEG Surround) is efficient technology for multi-channel audio compression. Rather than performing a discrete coding of the individual audio input channels, MPEG Surround captures the spatial image of a multi-channel audio signal into a compact set of parameters that are used to synthesize a high quality multi-channel representation from a transmitted downmix signal. MPEG…
Compressed air — Part 2: Test methods for oil aerosol content
ISO 8573-2:2007 specifies test methods for the sampling and quantitative analysis of oil aerosols and liquid oil that can typically be present in compressed air. Test methods for oil vapour are excluded from ISO 8573-2:2007 as they are covered by ISO 8573-5.
Two different methods are described, method A and method B. Method B is subdivided into two parts to clearly distinguish between procedures…
Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric...
ISO 5518:2007 specifies a method for determining the benzoic acid content of fruits, vegetables and derived products.
As chlorobenzoic acids are resistant to oxidation, the method cannot be applied in the presence of p-chlorobenzoic acid, as the absorption spectrum of this acid is close to that of benzoic acid. Neither can it be used in the presence of cinnamic acid, which is transformed into…
Brown coals and lignites — Determination of moisture content — Part 1: Indirect gravimetric method f...
ISO 5068-1:2007 specifies two methods for determination of the total moisture content of brown coals and lignites using an indirect gravimetric single-stage method and a two-stage method.
Brown coals and lignites — Determination of moisture content — Part 2: Indirect gravimetric method f...
ISO 5068-2:2007 specifies a method for the determination of the moisture content in the analysis sample of brown coals and lignites using an indirect gravimetric method.
