Weights and Measures Laws and Regulations. The joule per kilogram kelvin is the specific entropy of a system of homogeneous mass of one kilogram receiving a quantity of heat equal to one joule at the constant thermodynamic temperature of one kelvin, provided that no irreversible change takes place in the system. The Weights and Measures Division promotes uniformity in U.S. weights and measures laws, regulations, and standards to achieve equity between buyers and sellers in the marketplace. Contact: Contact the Weights and Measures Division . (3) On the expiry of the period of aforesaid five years, the use of coefficient and their respective symbols as specified in Schedule X shall be compulsory. 4th September, 1985 . Note 1.-This unit is also called "per metre" or "dioptre". (2);The national prototype of the kilogram, and every other national standard, standard equipment and object shall be maintained and realised periodically in accordance with such instructions as the General Conference on Weights and Measures or the International Organisation of Legal Metrology or any organisation constituted by either of them may issue from time to time. WEIGHTS, MEASURES AND STANDARDS Louisiana Administrative Code September 2006 2 4. The unit "newton metre" shall be written Nm or m.N to avoid confusion with mN, the millinewton, m/s or by writing the product of m and s-1 as ms-1. (3);Every working standard shall be verified against the appropriate secondary standard, by any of the laboratories where secondary standards are maintained, at an interval not exceeding one year. The joule per kelvin is the heat capacity of a homogeneous body in which a quantity of heat equal to one joule produces an increase of one kelvin in the thermodynamic temperature. The National Physical Laboratory shall publish such values periodically but in any case at least once in every five years. (3) The prefixes specified in Schedule III shall not be used with the "are" or hectare. The joule per mole is the molar energy of one mole of substance having the energy of one joule. 290.604 State reference standards of weights and measures; storage; maintenance; removal from laboratory; use. Reference, Secondary And Working Standards. The lumen is the luminous flux emitted in a solid angle of one steradian by a uniform point source having a luminous intensity of one candela. [Date of commencement, 28th December, 1960.] The square metre is the area of a square with sides of one metre each. The metre per second is the velocity (speed) of a body in motion which traverses a distance of one metre in one second when set in uniform motion. The square metre per second is the kinematic viscosity of a liquid which has a dynamic viscosity of one pascal second and a density of one kilogram per cubic metre. The Act makes provisions with the object to regulate the trade or commerce by providing standards in relation to the weights and measures. Agency Details Website: Weights and Measures Division. The mole per cubic metre is the concentration of a homogeneous solution having a total volume of one cubic metre and containing one mole of the given substance. Custody, maintenance, etc., of national standards of weights and measures- (1)The work relating to the realisation, establishment, custody, maintenance, determination, reproduction and updating of national standards of weights and measures shall, on the commencement of these rules, be the responsibility of the National Physical Laboratory. - Jurisdiction. Names, Magnitudes And Symbols Of Si Prefixes And Principles Of Use Of Si Prefixes, Name of prefixes, their magnitudes and symbols, Explanation.-The unit of length is metre with symbol m : after adding a prefix 'c' for centi we get "cm" as new unit symbol. (2) Ordinarily, the coefficients and their respective symbols specified in Schedule X shall be used: Provided that any coefficient which is not specified in Schedule X but which corresponds to any coefficient specified in that Schedule, may be used for a period of five years from the commencement of these rules: Provided further where any new coefficient added in Schedule X, any coefficient corresponding to the coefficient so added may be used for a period of five years from the date of addition of such coefficient.