Nom 042 scfi 1997
MEXICAN OFFICIAL NORM NOM-145-SCFI-2001. COMMERCIAL INFORMATION – LABELING OF HONEY IN ITS DIFFERENT PRESENTATIONS. In the margin a seal with the National Coat of Arms, which reads: United Mexican States – Secretariat.
Source : Official Gazette of the Federation Date of publication: December 09, 1998 NOM-041-SCFI-1997 MEXICAN OFFICIAL STANDARD, MEASUREMENT INSTRUMENTS-METALIC METAL VOLUMETRIC MEASUREMENTS CILINDRICAL FOR
Source : Official Gazette of the Federation Date of publication: November 07, 1997 NOM-040-SCFI-1994 MEXICAN OFFICIAL STANDARD, MEASUREMENT INSTRUMENTS-RIGID INSTRUMENTS-GRADUATED RULES FOR MEASUREMENT
Source : Diario Oficial de la Federación Date of Publication: March 06, 2000 Date of modification: July 26, 2000 Date of clarification: August 20, 2001 NOM-140-SCFI-1999 MEXICAN OFFICIAL STANDARD,
MEXICAN OFFICIAL STANDARD NOM-101-STPS-1994, SAFETY – CHEMICAL FOAM-BASED EXtinguishers WHEREAS, on June 21, 1994, in compliance with the provisions of article 46, section I, of the
Mexico’s Federal Metrology and Standardization Law defines the Mexican Conformity Assessment System, which includes mandatory certification (NormasOficiales Mexicanas, NOM) or voluntary certification (Normas Mexicanas, NMX). In the area of electrical and electronic products, the Secretaria de Comercio y Fomento IndustrialSECOFI- now Secretaria de Economia delegates accreditation, testing and certification to the following organizations:Direccinia General de Normas (DGN): Accredits certification bodies and issues certificates for products for which there is no certification body. Entidad Mexicana de Acreditacin (EMA): Evaluates and accredits Verification Units, Testing and/or Calibration Laboratories, as well as Certification Bodies. (ANCE): Responsible for the issuance of standards and certification of electrical products, such as electrical appliances. This organization is also a nationally accredited and approved testing laboratory.Normalizacin y Certificacin Electrnica A.C. (NYCE): Responsible for the issuance of standards and certification of electrical products, such as electrical appliances. (NYCE): Responsible for the development of standards and certification of electronic products.Cmara Nacional de la Industria Electrnica, de Telecomunicaciones e Informatica (CANIETI): Responsible for the development of standards and testing of electrical and electronic products.
It is necessary to rely on regulations or manuals, these are based on experience and research, to be able to execute an activity in a uniform way. The historical background of the standardization responds to the establishment of a series of principles applicable to a certain activity of man, in this case the technical drawing. The instruments used in the realization of a technical drawing requires calculation, measurement, well-drawn lines, precision, precision, in short, a series of conditions that make necessary the use of good instruments, good materials, and added to this, the theoretical knowledge that together with the practice make a draftsman excel.
Positive displacement diaphragm type meters for natural gas or L.P. – With a maximum capacity of 16 m3/h with a maximum pressure drop of 200 Pa (20.40 mm of water column). Published in the D.O.F. October 23, 1998 (This standard cancels NOM-014-SCFI-1993).
Instrumentos de medición-Watthorímetros electromecánicos-Definiciones, características y métodos de prueba. Published in the D.O.F. September 13, 1999. (this Standard cancels NMX-CH-108/2-1991).
Measuring Instruments-Steel measuring tapes and flexometers (this Standard cancels Official Mexican Standard NOM-046-SCFI-1999, Measuring Instruments-Steel measuring tapes and flexometers, and its Clarification, published on July 26 and August 9, 1999, respectively).
The 10% rule states that if the tolerance of an item is t, then the instrument used to demonstrate compliance with the specification must have an uncertainty equal to or better than t/10. In practice it is sometimes difficult to obtain even t/5 but, whatever the tolerance and uncertainty, a decision always needs to be made.