Repeal

The Weights and Measures Act, Revised Edition 2000 is hereby repealed. 35 SCHEDULE 1 NATIONAL METROLOGY ACT Classes of Units [Section 3 and 6] PART I BASE UNIT Physical Quality Name of Unit Unit Symbol Definition Length Metre m The unit for the measurement of length equal to 1650163.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p10 and 5d5 of the Krypton-86 atom mass Kilogram Kg The unit for the measurement of mass of the international prototype of the kilogram established in the year 1889 by the Conference of weights and Measures deposited at the International Bureau of Weights and Measures. time Second s The unit for the measurement of time, being the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caeium- 133 atom. Electric Ampere A The unit for the measurement of electric current, being that constant current, which, if maintained in two straight parallel conductors of infinite length, of current 36 National Metrology Physical Quality Name of Unit Unit Symbol Definition negligible circular cross-section and placed one metre apart in vacuum, would produce between these two conductors a force equal to 2 × 10-7 newton per metre of length. thermo- dynamic temperature Kelvin k The unit for the measurement of thermodynamic temperature, being the fraction 1/273.16 of the thermodynamic temperature of the triple point of water luminous Candela cd The unit of measurement of luminous intensity, being the luminous intensity, in a given direction of a source which emits monochromatic radiation of frequency 540 × 1012 hertz having a power flux in that direction of 1/683 watt per steradian. Amount of intensity mole* mol The unit for the measurement of the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. substance * Note: When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, the particles or specified groups of such particles. National Metrology 37 PART II SUPPLEMENTARY UNITS Physical Quantity Name of Unit Unit Symbol Definition Radian rad The unit for the measurement of plane angle, being the angle with its vertex at the centre of a circle and subtended by an arc of the circle that is equal in length to its radius. solid angle steradian Unit Symbol the unit for the measurement of solid angle, being the angle with its vertex at the centre of a sphere and subtended by an area on the spherical surface equal to that of a square with sides equal in length to the radius. 38 National Metrology PART III SI DERIVED UNITS EXPRESSES IN TERMS OF BASE UNITS area Square metre m2 volume cubic metre m3 speed, velocity metre per second m/s, ms-1 acceleration metre per second squared m/s2, ms-2 wave number 1 per metre m-1 density, mass density kilogram per cubic metre Kg/m3, kgm-3 Current density magnetic field strength concentration (of amount of substance) specific volume luminance A/m-2, Am-2 A/m, Am-1 mol/m3, mol m3 m3/kg, m3kg-1 cd/m2, cdm-2 ampere per square metre ampere per meter mole per cubic metre cubic meter per kilogram candela per square metre PART IV SI DERIVED UNITS WITH SPECIAL NAMES Quantity SI Unit Symbol Expression Expression in terms of SI base Name in terms of other units units frequency hertz Hz - s-1 force newton N - Mkgs-2 pressure, pascal Pa N/m2 m-1 kgs-2 stress Energy, work quantity of heat joule J Nm m2kgs-2 power watt W J/s m2kgs-3 Quantity of electric charge coulomb C - SA National Metrology 39 Quantity SI Unit Symbol Expression Expression in terms of SI base Name in terms of other units units Quantity SI Unit Symbol Expression Expression in terms of SI base Name in terms of other units units Electric potential, volts, potential difference electro- motive force volt V W/A m2kgs-3A-1 capacitance farad F C/V m-2 kg-1s4 A-1 Electric resistance ohms Y V/A m2kgs-3A2 conductance Seimens S A/V m-2kg-1s3A2 Magnetic flux weber Wb Vs M2kgs-2A-1 Magnetic flux density tesla T Wb/m2 Kgs-2A-2 Inductance Henry H Wb/A M2kgs-2A-2 Luminous flux Lumen lm - cdsr Illuminance Lux lx Lm/m2 m-2cdsr Absorbed dose, specified energy imparted, kerma Gray Gy J/kg m-2s-2 Absorbed dose index Degree °C - k Celsius temperature Celsius 40 National Metrology PART V EXAMPLES OF SI DERIVED UNITS EXPRESSED BY MEANS OF SPECIAL NAMES AND BASE UNITS Quantity SI Unit Symbol Expression in terms of SI base Name Units dynamic viscosity pascal second Pas m-1kgs-1 moment force Metre newton Nm m2kgs-2 surface tension Newton per metre N/m kgs-2 Power density, heat flux density, inadiance Watt per square metre W/m kgs-3 Heat capacity, entropsyh Joule per Kelvin J/K m2kgs-2k-1 Specific heat capacity, Joule per kilogram J/(kg.K) m2s-2K-1 Specific entropsy Kelvin Specific energy Joule per kilogram J/kg m s-2 Thermal conductivity Watt per metre Kelvin W/(mK) mkgs-3K-1 J/m3 m-1kgs-2 Energy density Joule per cubic metre V/m Mkgs-3A-1 Electric field strength Volt per metre Electric charge density Coulomb per cubic metre C/m3 m-2As Electric flux density Coulomb per square metre C/m2 m-2As Permitivity Farad per metre F/m m-3kg-1s4A2 H/m m kgs-2A-2 Permeability Henry per metre J/mol m2kgs-2mol-1 Molar energy Joule per mole Molar entropy, molar heat capacity Joule per mole Kelvin J/(mol.K) m2 kgs2k-1mol-1 Exposure (X and Y Coulomb per C/kg Kg-1As National Metrology 41 Quantity SI Unit Symbol Expression in terms of SI base Name Units rays) kilogram Absorbed dose rate Gray per second Gy/s M2s-3 PART VI PERMITTED UNITS Physical Quantity Name of Unit Unit Symbol Definition time minute hour day week calendar year 1 min = 60s 1 h = 60min 1 d = 24 h 1 wk = 7 d 1 yr = 365 d or 366 d (leap year) plane angular measure min h d wk yr 10=n/180 radian 1’=1/60 1 “= 1’/60 Volume of capacity Degree Minute second 0 ‘ “ Litre L IL = 1dm3 mass tonne t 1t = 1,000 kg pressure bar standard atmosphere Bar atm 1 bar = 100 kpa area are hectare a ha 1 are = 100m 1 hectare = 10,000 m2 temperature degree celsius °C 10C = 1k (temperature interval) marine and aerial nautical mile nautical mile 1 nautical mile = 1825m navigation knot knot 1 knot = 1 nautical mile per hour 42 National Metrology PART VII UNITS USED WITH SI IN SPECIALIZED SCIENTIFIC FIELDS Name of Unit Unit Symbol Value in SI Units Electron volt eV 1cV= 1.602 19 × 10-19J unified atomic mass u 1u= 1.660 57 × 10 – 27 kg astronomical unit AU 1 AU = 149 597.87 × 106m parsec pc 1 pc= 30 857 × 10m angstrom A0 1 A° = 10-10m barn B 1 b= 1028m2 curie Ci 1Ci = 3.7 × 1010s- 1(Exactly) gal Gal 1 Gal = 4.54609 dm3 metric carat* - 1 metric carat = 200mg* rontgen R 1R = 2.58x104Ckg-1 National Metrology 43 SCHEDULE 2 NATIONAL METROLOGY ACT International System Units [Section 3] PREFIXES * FOR MULTIPLES AND SUBMULTIPLES OF BASE, SUPPLEMENTARY AND DERVIED UNITDS OF MEASUREMENT Prefix Symbol Definition exa peta 1018 1012 1012 109 100 103 102 101 10-1 10-2 Prefix Symbol Definition milli micro E P T G M tera giga mega kilo hector k h da deca deci centi d c 10-3 10-6 10-9 10-12 10-15 10-18 m h n p nano pico femto f a atto * Note: Not to be confused with the carat to expressed the fineness of gold or other 44 National Metrology SCHEDULE 3 NATIONAL METROLOGY AUTHORIZED UNITS FOR USE IN TRADE. [Sections 2, 4, 5, 6, 12, 13, 16, 28, and 46] PART I THE INTERNATIONAL SYSTEM OF UNITS AND OTHER METRIC UNITS 1.1 MEASUREMENT OF LENGTH 1.1.1 SI UNITS Kilometre (km) = 1 000 metres Meter (m) = as defined in Part 1 of the Schedule 1 Millimetre (mm) = /1 000 meters Micrometre (m) = 1/1 000 000 meters 1.1.2 OTHER METRIC UNITS Nautical mile = 1 852 metres Centimetre = 1/100 metres National Metrology 45 1.2 MEASUREMENT OF AREA 1.2.1 SI UNITS Square metre (m2) = as defined in Part III of the First Schedule Square kilometre (km) = 1 000 000 square metres Square millimetre ((mn)2) = 1/1 000 000 th of square metre 1.2.2 OTHER METRIC UNITS Hectare (ha) = 10 000 square metres Are (a) = 100 square metres Square centimetre= 1/10 000th of a square metre 1.3 MEASUREMENT OF PLANE AND SOLID ANGLE 1.3.1 PLANE ANGLE Radian (rad) = as defined in Part II of the First Schedule Degree (0) = /180 radians Minute (‘) = 1°/60 Second (“) = 1’/60 1.3.2 SOLID ANGLE Steradian (sr) = as defined in Part III of the First Schedule 1.4 MEASUREMENT OF SPEED 46 National Metrology 1.4.1 SI UNITS Metre per second (m/s) = as defined in Part III of the First Schedule 1.4.2 OTHER METRIC UNITS Kilometre per hour = 10/36 metres per second 1.5 MEASUREMENT OF VOLUME OR CAPACITY 1.5.1 SI UNITS Cubic metre = as defined in Part III of the First Schedule 1.5.2 OTHER METRIC UNITS Hectoliter (hL) = 100 litres Litre (L) = 1/1 000th of a cubic metre Cubic centimetre((cm)3) = 1/1 000 000 th of a cubic metre Decilitre (dL) = 1/10 th of a litre Centiliter (cL) = 1/100 th of a lire Millilitre (mL) = 1/1 000th of a litre 1.6 MEASUREMENT OF MASS 1.6.1 SI UNITS Kilogram (kg) = as defined in Part 1 of the First Schedule Gram (g) = 1/1000 th of kilogram National Metrology 47 Milligram (mg) = 1/1000 000 th of a kilogram Microgram (hg) = 1/1000 000 000 th of a kilogram 1.6.2 OTHER METRIC UNITS Tonne (t) = 1 000 kilogram Metric carat = 1/5 th part of a gram 1.7 MEASUREMENT OF DENSITY (MASS DENSITY) 1.7.1 SI UNITS Kilogram per cubic metre = as defined in Part III of the First Schedule 1.7.2 OTHER METRIC UNITS Tonne per cubic metre = 1 000 kilograms per cubic metre 1.8 MEASUREMENT OF FORCE 1.8.1 SI UNITS Megapascal (MPa) = 1 000 000 pascals Kilopascal (kPa) = 1 000 pascals Pascal (Pa) = as defined in Part IV of the First Schedule 1.10 MEASUREMENT OF LINER DENSITY OF TEXTILES 1.10.1 OTHER METRIC UNITS Tex (tex) = the mass in grams of one kilometre of yarn 48 National Metrology 1 g/1 km = 106kg/m Millitex (mtex) = 1/1 000 th of a tex Decitex (dtex) = 1/10 th of a tex Kilotext (Ktext) = 1 000 tex 1.11 MEASUREMENT OF TIME AND FREQUENCY 1.11.1 TIME Minutes (min) = 60 s Hour (h) = 60 mins Day (d) = 24 h Week = 7 d Year = 365 d or 366 d (leap year) 1.11.2 FREQUENCY Gigahertz (GHz) = 1 000 000 000 hertz Megahertz (MHZ) = 1 000 000 hertz Kilohertz (kHz) = 1 000 hertz Hertz (Hz) = as defined in Part IV of the First Schedule 1.12MEASUREMENT OF TEMPERATURE 1.12.0 SI UNITS Kelvin (k) = as defined in Part I of the First Schedule National Metrology 49 1.12.2 OTHER METRIC UNITS 1.12.1 SI UNITS Kelvin (k) = as defined in Part I of the First Schedule 1.12.2 OTHER METRIC UNITS Degree Celsius (°C) = one Kelvin (K) The Celsius temperature scale is defined by the following equation: 1. T – T0 where:- (i) t temperature in degree Celsius. (ii) T temperature in kelvins (iii) T0 273.15 K. 1.13 MEASUREMENT OF ENERGY AND POWER 1.13.1 ENERGY, WORK AND QUANTITY OF HEAT Joule (J) = as defined in Part IV of the First Schedule Kilojoule (kJ) = 1 000 joules Megajoule (MJ) = 1 000 000 joules and all other multiples and sub-multiples as defined in the Second Schedule Watthour (Wh) = 3.6×103joules Kilo watthour (kWh) = 1 000 watthour 50 National Metrology Electron volt (ev) = The energy acquired by an electron in passing through a potential difference of 1 volt in vacuum. 1.13.2 POWER ENERGY FLOW RATE AND HEAT FLOW RATE Milliwatt (mW) = 1/1 000 of a watt Watt (W) = as defined in Part IV of the First Schedule Kilowatt (kW) = 1 000 watts Megawatt (MW) = 1 000 000 watts and all other multiples and sub-multiples as defined in the Second Schedule 1.14. SPECIFIC ENERGY 1.14.1 SI UNITS Kilojoules per kilogram (kJ/Kg) = 1 000 joules per kilogram Joule per kilogram (J/Kg) = 1 joule per kilogram 1.14.2 OTHER UNITS Joule per gram (J/g) = 1/1 000 th joules per kilogram 1.15 ELECTRIC CURRENT 1.15.1 SI UNITS Ampere (A) = as defined in Part I of the First Schedule Milliampere (mA) = 1/1 000 th of ampere National Metrology 51 Microampere (A) = 1/ 1 000 000 th of ampere 1.16. ELECTRIMOTIVE FORCE AND POTENTIAL DIFFERENCE 1.16.1 SI UNITS Kilovolt (kV) = 1 000 volts Volt (V) = as defined in Part IV of the First Schedule Millivolt (mV) = 1/1 000 th of a volt Microvolt (iV) = 1/1 000 000 th of a volt 1.17 ELECTRIC CAPACITANCE 1.17.1 SI UNITS Henry (H) = as defined in Part IV of the First Schedule Millihenry (mH) = 1/1 000 the of a henry Microhenry (iH) = 1/1 000 000 th of a henry 1.18 ELECTRIC REISTANCE 1.18.1 SI UNITS Megaohm (MU) = 1 000 000 ohms Kiloohm (KU) = 1 000 ohms Ohm (U) = as defined in Part IV of the First Schedule Milliohm (MU) = 1/1 000 th of an ohm 52 National Metrology Microohm (iU) = 1/1 000 th of an ohm 1.19.1 SI UNITS Coulomb (C) = as defined in Part IV of the first Schedule Milicoulomb (mC) = 1/1 000 th of a coulomb Microcoulomb (iC) = 1/1 000 000 th of a coulomb 1.19.2 other units Amperehour (Ah) = 36000 coulombs 1.20 LUMINOUS INTENSITY 1.20.1 SI UNITS Candela (cd) = as defined in Part I of the First Schedule 1.21 ILLUMINATION 1.21.1 SI UNITS lux (lu) = as defined in Part IV of the first Schedule 1.22 LUMINOUS FLUX 1.22.1 SI UNITS Lumen (lm) = as defined in Part IV of the First Schedule 1.23 ACTIVITY 1.23.1 SI UNITS National Metrology 53 Becquerel (Bq) = as defined in Part IV of the First Schedule Millibecquerel (mBq) = 1/1 000 of a Becquerel 1.24 ABSORBED DOSE 1.24.1 SI UNIT Gray (Gy) = as defined in Part IV of the First Schedule Milligray (mGy) = 1/1 000 of a gray 1.25 EXPOSURE 1.25.1 SI UNITS Coulomb per kilogram (C/kg) = as defined in Part IV of the First Schedule PART II THE BRITISH IMPERIAL SYSTEM OF UNITS 1. MEASUREMENT OF LENGTH Yard = 0.9144 metre Mile = 1760 yards Furlong = 220 yards Chain = 22 yards Foot = 1/3rd of a yard 54 National Metrology Inch = 1/26th of a yard 2. MEASUREMENT OF AREA Square mile = 640 acres Acre = 4840 square yards Rood = 1210 square yards Perch or square pole = 121/4 square yards Square inch foot = 1/144th of a square 3. MEASUREMENT OF VOLUME OR CAPACITY 3.1 VOLUME IN GENERAL Cubic yard = a volume equal to that of a cube each edge of which measures 1 yard Cubic foot = 1/27 th of a cubic yard Cubic inch foot = 1/1728 th of a cubic foot 3.2 LIQUID MEASURE Gallon = the space occupied by 10 pound weight of distilled water of density 0.998859 gram per millilitre weighed in air of density 0.001217 grams per millilitre against weights of density 8.136 grams per millilitre Quart = ¼ gallon Pint = ½ quart Gill = ¼ pint Fluid ounce = 1/20 pint Fluid drachm = 1/8 fluid ounce Minim = 1/60 fluid drachm National Metrology 55 Bushel = 8 gallons Peck = 2 gallons Chaldron = 288 gallons 3.3 MEASUREMENT OF MASS OR WEIGHT Ton = 2240 pounds Hundred weight = 112 pounds Quarter = 28 pounds Stone = 14 pounds Pound = 0.453 592 37 kilogram Kilogram Ounce = 1/16 pound Dram = 1/16 ounce Grain = 1/7000 pound Ounce troy = 480 grains 56 National Metrology SCHEDULE 4 NATIONAL METROLOGY ACT Weights and Measures Lawful for Use in Trade [Sections 2 and 17] PART I THE INTERNATIONAL SYSTEM OF UNITS AND OTHER METRIC UNITS 1.1 LINEAR MEASURES Measure of - 100 metres 50 metres 30 metres 20 metres 10 metres 5 metres 3 metres 2 metres 1 metre 1 centimetre 1 millimetre 1 micro metre 1.2 SQUARE MEASURES Measures of, or any multiple of, square decimetre. 1.3 CUBIC MEASURES National Metrology 57 Measure of, or any multiple of 1, the cubic decimetre = 0.001m3 1.4 CAPACITY MEASURES Measures of 10 litres or any multiple of 10 litres: 5 litres 2 ½ litres 2 litres 1 litre 500 millilitres 250 millilitres millilitres 100 millilitres millilitres 25 millilitres millilitres 10 millilitres 5 millilitres 2 millilitres 1 millilitres 1.5 WEIGHTS 1.5.1 WEIGHTS OF 50 kilograms 20 kilograms 10 kilograms 5 kilograms 2 kilograms 1 kilograms 500 grams 200 grams 58 National Metrology 100 grams 50 grams 20 grams 10 grams 5 grams 2 grams 1 grams 500 milligrams 200 milligrams milligrams 50 milligrams milligrams 10 milligrams 5 milligrams 2 milligrams 1 milligrams 1.5.2 WEIGHTS OF 500 carats (metric) 200 carats (metric) 100 carats (metric) 50 carats (metric) 20 carats (metric) 10 carats (metric) 5 carats (metric) 2 carats (metric) 1 carat (metric) 0.5 carats (metric) 0.25 carats (metric) National Metrology 59 0.2 carats (metric) 0.1 carat (metric) 0.05 carats (metric) 0.02 carats (metric) 0.01 carat (metric) PART II THE BRITISH IMPERIAL SYSTEM 2.1 LINEAR MEASURES Measures of 100 feet 66 feet 50 feet 33 feet 20 feet 10 feet 8 feet 6 feet 5 feet 4 feet 1 yard = 1/10th of an inch 2 feet = 1/16 th of an inch 1 foot = 1/32 of an inch 6 inches = 1/64 of an inch 1 inch = 1/100 th of an inch = 1/128 th of an inch = 1/256 th of an inch 60 National Metrology = 1/1000th of an inch 2.2 SQUARE MEASURES Measures of, or any multiple of, 1 square foot 2.3 CUBIC MEASURES Measures of, or any multiple of 1/4th cubic yard. 2.4 CAPACITY MEASURES Measures of 1 gallon or any multiple of 1 gallon ½ gallon 1 quart 1 pint ½ pint 8 fluid ounces 6 fluid ounces 4 fluid ounces 1 fluid ounces or sub-multiples of 1 fluid ounce 4 fluid drachms 2 fluid drachms 1 fluid drachm 60 minims 30 minims 10 minims 1 bushel ½ bushel 1 peck 2.5 WEIGHTS National Metrology 61 2.5.1 WEIGHTS OF - 56 pounds 50 pounds 28 pounds 20 pounds 14 pounds 10 pounds 7 pounds 5 pounds 4 pounds 2 pounds 1 pounds 8 ounces 4 ounces 2 ounces 1 ounce 8 drams 4 drams 2 drams 1 dram ½ dram 100 grains 50 grains 30 grains 20 grains 10 grains 5 grains 3 grains 2 grains 1 grains 0.5 grains 0.3 grains 0.2 grains 0.1 grains 0.05 grains 0.03 grains 0.02 grains 62 National Metrology 0.01 grains 2.5.2 Weights of 500 ounces troy 400 ounces troy 300 ounces troy 200 ounces troy 100 ounces troy 50 ounces troy 40 ounces troy 30 ounces troy 20 ounces troy 10 ounces troy 5 ounces troy 4 ounces troy 3 ounces troy 2 ounces troy 1 ounces troy National Metrology 63 SCHEDULE 5 NATIONAL METROLOGY ACT Maximum Permissible Error in Relation to Packaged Commodities [Section 28] 1. Maximum permissible error on net quantity declared by weight or volume (a) The maximum permissible error, in excess or in deficiency, in the net quantity by weight or volume of any commodity, is specified in the table below: TABLE 1 Maximum permissible errors on net quantity declared by weight or by volume- Maximum permissible error in excess or SI Declared quantity Maximum permissible error in excess in deficiency As percentage of No. g or ml declared quantity g or ml (i) up to 50 9 (ii) 50 to 100 45 (iii) 100 to 200 45 . (iv) 200 to 300 9 (v) 300 to500 3 (vi) 500 to 1 000 15 (vii) 1 000 to 10 000 1.5 (viii) 10 000 to 15 000 150 64 National Metrology (ix) more than 15 000 1.0 .. (b) The maximum permissible error specified as a percentage shall be rounded off to the nearest one-tenth of a g or ml, for declared quantities less than or equal to 1 000g or ml, and to the next whole g or ml for declared quantities above 1 000g or ml. Maximum permissible error, in excess or in deficiency, in the net quantity declared in terms of length, area or number of any commodity is specified in Table II below, TABLE 1I Maximum permissible errors on net quantity declared by Length, area or number SI No. declared or in deficiency Quantity Maximum permissible error in excess or in deficiency ( ) in units of length 2% of declared quantity up to 10 meters and thereafter 1% of declared quantity ( ) in units of area 4% of declared quantity up to 10 sq. meters and thereafter 1% declared quantity ( ) by number 2% of declared quantity