IEC

CEI/IEC Commission Electrotechnique Internationale/ International Electrotechnical Commission... 

Fig. 1. Classification of chromatographic systems where gsc is gas—soHd chromatography glc, gas—Hquid chromatography sec, size-exclusion chromatography Isc, Hquid—soHd chromatography Uc, Hquid—Hquid chromatography iec, ion-exchange chromatography tic, thin-layer chromatography ...

IEC 600.14-12 has recommended four rotor designs, i.e. N. H and NY. HY, to define starting performance for DOL and 17A startings respectively. They are along similar lines, ones to those in NEMA MG-I. They define minimum torques, though the manufacturer can produce better ones. 

The following discussion is primarily based upon EN6I000-3-2, which is more industrial-based products. EN60555 is the newer version of IEC-555 and covers the emitted harmonics of household products. Knowing the product class is very important for designing the power factor interface for the ac line. Products that draw less than 75 W today and 50 W in the near future, do not have to comply with the relative limits, only to absolute maximums laid out by the specifications. The limits presented in Table C-I may change, so please refer to the latest... 

Laboratory product identification and testing. Requirement addressed by ISO/IEC 17025. 

Are all in-house inspection, testing, and calibration laboratories compliant with the requirements of ISO/IEC 17025 ... 

The standard requires that where inspection, testing, and calibration services are conducted fay a supplier s laboratory facility, the laboratory shall comply with ISO/IEC 17025 including use of a laboratory scope. 

ISO/IEC 17025 replaces ISO/IEC Guide 25 and defines the internationally-accepted criteria for the technical evaluation of laboratories in the future. 

There are two sources of confusion with this requirement. First is the issue of accreditation and second is the difference between ISO/TS 16949 and ISO/IEC 17025. 

ISO/TS 16949 states that accreditation of supplier facilities to ISO/IEC 17025 or national equivalent is neither required nor does it satisfy all requirements in ISO/TS 16949. It can also be said that ISO/TS 16949 does not satisfy all the requirements of ISO/IEC 17025. Hence, ISO/IEC 17025 is the equivalent of ISO/TS 16949 for the calibration sector. 

As ISO/IEC 17025 does not cover some of the system elements, your laboratory should therefore be subject to audit against the relevant requirements of ISO/TS 16949. 

Currently laboratories seek accreditation to ISO/IEC Guide 25 but this is being replaced by ISO/IEC 17025 in 2000. 

Assess your internal laboratories against ISO/IEC 17025 and act on the differences. 

Check that your external laboratories are accredited to ISO/IEC Guide 25 as a minimum. 

Don t assume that a laboratory that is registered to ISO 9002 - whether internal or external - can meet the requirements of ISO/IEC 17025. 

IEC/TC56, Process Certification Standard, Working Draft, August 1993. 

Handbooks are notorious for listing compounds according to their common names. One gives the name iec-isoamyl alcohol for a compound which could be called 1,2-dimethylpropyl alcohol according to the lUPAC functional class rules. The best name for this compound is the substitutive TUPAC name. What is it ... 

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