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A document purporting to be signed by an inspector Evidenco of factr and certifying- in certain (0) that any weighing or measuring equipment speci- documontr, fied therein was inspected and tested by him on a date specified therein, and the result of the inspec- tion and test; or (b) that any goods specified therein were weighed, measured or counted by him on a date specified therein and were found to be of a weight, measure- ment or number specified therein, shall, upon production thereof in evidence in any proceed- ings, be evidence of the facts certified therein and in the absence of evidence in rebuttal thereof shall be conclusivt evidence of those facts. [The inclusion of this page is authorized by L.N. 146/1999] 22 L.N 34c/1998. WEIGHTS AND MEASURES FIRST SCHEDULE (Section 3) Definitions of Units of Measurement PART I Base Units Unit Quantity and Symbol amount of mole (mol) - substance electric current length luminous intensity ampere (A) metre (m) candela (cd) mass kilogram (kg) thermodynamic kelvin (k) temperature time second (s) Definition of Unit The amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon. Note: When the mole is used the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles or specified groups of such particles. That constant current which, if maintained in two straight parallel conductors of infinite length of negligible circular cross-section and placed one metre apart in vacuum, would produce between them a force equal to 2x 1 0-' newton per metre of length. The length of the path travelled by light in vacuum during a time interval of 11299 792 458 of a second. The luminous intensity in a given direction of a source that emits non- chromatic radiation of a frequency, 540 x 10'* hertz and that has a radiant intensity in that direction of 11683 watt per steradian. The unit of mass, which is equal to the mass of the international prototype of the kilogram. The fraction, 1 R73.16 of the thermo- dynamic temperature of the triple point of water. The duration of 9 192 63 1 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom. [ n e inclusion ofthis page is authorized by L.N. 146/1999] WEIGHTS AND MEASURES FIRST SCHEDULE, c o d PART I I Derived Units Physical Unit Definition Quantity and Symbol Derivation of Unit 23 L.N. 34cll998. absorbed dose activity (of radionu- clides) capacitance electric electric charge, quantity of electricity gray (GY) J/kg The energy imparted by ionizing radiation to a mass of matter corresponding to one joule per kilogram. bacquerel S The activity of a radionuclide (Bq) having one spontaneous nuclear transition per second. farad (F) C/V-A. s/V The electric capacitance that exists between two conductors when the transfer of an electric charge of one coulomb from one to the other changes the potential difference between them by one volt. coulomb (C) A.s The quantity of electric charge that is transferred each second by an electric current of one ampere. electric siemens ( S ) Q-1 The electric conductance of a conductor that has an electrical resistance of one ohm. electric volt (V) W/A-J/C The potential difference potential that exists between two difference points on a conductor carrying an unvarying electric current of an ampere when the power dissipated between those points is equal to one watt. electric ohm (Q)V/A The electric capacitance resistance that exists between two points on a conductor which does not contain any source of electromotive conductance ('l'hc inclusion ol'this pi\gc is iiutliorixcd by I..N 14(1/lOo()~ 24 WEIGHTS AND MEASURES PART II, contd Physical Unit Quantity and Symbol Derivation - - force newton (N) frequency hertz (Hz) illuminance, lux (Ix) illumination inductance henry (H) luminous tlux lumen (lm) magnetic tlux weber (Wb) kg.m/s2 S-' Im/m' V. sJA cdsr V.S Definition of Unit force when a constant potential difference of one v o It m a i n t a i n ed between those points results in a current of one ampere in the conductor. The force which when applied to a body having a mass of one kilogram causes an acceleration of one metre per second in the direction of application of the force. The frequency of a periodic phenomenon of which the period is one second. The illumination of one lumen per square metre. The electric inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current that traverses the circuit varies uniformly at the rate of one ampere per second. The luminous flux emitted into unit solid angle by an isotropic point source having a luminous intensity of one candela. The flux which linking a circuit of one turn produces in it an electromotive force of one volt as it is reduced to zero at a uniform rate in one second. (The inclusion oftliis page is nuthorizcd hy I .N. IJb/IYYY] WEIGHTS AND MEASURES 25 PART 11, contd Physical Unit Quantity and Symbol Derivation - - - magnetic flux telsa (T) . Wb/m2 density. magne- tic, induction plane angle power, radiant flux pressure stress solid angle work, energy, quantity of heat radian (rad) watt (W) pascal (Pi) steradian joule (J) Definition of Unit - The density of one weber of magnetic flux per square metre. The plane angle between two radii of a circle which cut off on the circum- ference an arc equal in length to the radius. The power used when work is done or energy is expended at the rate of one joule per second. The pressure or stress which arises when a force of one newton is applied uniformly over an area of one square metre. The solid angle which having its vertex in the centre of a sphere, cuts off an area of the surface of sphere equal to that of a square with sides of length equal to the radius of the sphere. The work done or the energy expended when a force of one quantity newton moves the point of application a distance of one metre in the direction of that force. [The inclusion ofthis page is authorized by I..N. 146/19YO~ 26 WEIGHTS AND MEASURES L.N. 34c/1998. PART 111 Special or Perniitted Units Physical Unit Equivalent Quantity and Symbol Derivation of Unit - - - area are a I are=100m2 hectare ha 1 hectare= 10 OOOm2 marine and nautical nautical 1 nautical mile= 1852m aerial mile mile mass tonne t It= I OOOkg navigation knot knot I knot= I nautical mile per hour plane angular degree 0 1°= x measure 180 radian minute 9 ]'-E 60 !J second 99 10 -I 60 pressure bar bar 1 bar=100 000 Pa standard atm 1 atm= atmosphere 101 325 Pa temperature degree "C 1 O C = l K [temperature Celsius intervals) time minute min 1 min=60' hour h I h=60m day d 1 d-24h week wk 1 wk=7d calendar year Yr ly1=365d or 366d (leap year) volume litre L IL=ldm' capacity Note: Special or permitted units are internationally agreed units which are deviations from the strict Internationally System of Units. They are permitted either because of their practical importance or because of their I I W in snecialized scientific fields. (The inclusion ofthis page is authorized by L.N. 146/19W] 27 L.N. 34c/1998. Name of Unit L.N. 34cll998 WEIGHTS AND MEASURES PART IV Units used with the International System of Units in Specialized Scientrfic Fields Unit Symbol Definition - angstrom A" I A" = 10-lOm astronomical unit AU 1 AU = 149600x106m barn b 1 b = 1@28m? curie Ci 1 Ci=3.7 x 10'"-' electronic eV 1 eV = 1.602 I9 x IOl9J gal Gal 1 Gal = 1 0.2 metre per (second)' metric carat C M 1 C M = 2 x 104kg parsec PC I PC = 3 086 x 1013m rontgen R 1 R = 2.58 x 104 C kg-' unified atomic U 1 U = 1.66044~ 1OZ7kg mass PART V Customary Units of measurement deemed to be derived from the International System of Weights and Measures Base SI Unit Abbreviation from which Unit or Symbol derived Value - - - AREA square mile - metre 2.5899 sq kilometres acre - metre 4046.86 sq metres square rod sq rd metre 24.687 sq metres square yard sq Yd metre 0.8361 sq metre square foot sq ft metre 0.0929 sq metre square inch sq in metre 645.16 sq millimetres [The inclusion ofthis page is authorized by L.N. 146/1999] WEIGHTS AND MEASURES 28 .0 PART V, contd. Base SI Unit Abbreviation from which Unit or Symbol derived - - CAPACITY MEASUREMENT barrel gallon minim fluid drachm (1 /76,800 gal) (1/1,280 gal) pint (U8 gal) quart (114 gal) LENGTH Yard mile (1,760 yds) chain (22 yds) foot (I /3 yd) ft rod, pole or perch (5 1/2 yds) inch (1136 yd) in metre metre metre ) 1 1 metre ) ) metre ) metre ) metre metre ) metre ) 1 metre ) metre ) 1 metre ) Value -