Legal Metrology Weight Tolerance

The rules make this possible by mandating the testing of all measuring and weighing instruments in accredited laboratories approved by the Government of India and certified by NABL. The nominal value of the ratio between the weights to be applied to the platform to compensate for a given load and this load must not be less than 1/5000 (it must be displayed visibly directly above the platform). (b) The names of weights between 10 kg and 500 g may also be indicated on the cylindrical body of the weight, provided that the numbers and letters of the symbol are larger than those used for their marking on the button. (d) Notwithstanding the provisions of paragraph 4 (i) of this paragraph, this information shall not remain visible more than 1 second after removal of the load, provided that the weight has been previously stable and the marking is otherwise zero. As long as there is an indication of the weight after removal of the load, it is not possible to introduce or change a unit price. The distance between the scale marks shall not be less than 2 mm and shall be long enough to ensure that the normal machining tolerance of notches or scale markers does not cause an error in the weighing result greater than 0,2 of the test interval. On the first measurement, immediately repeat the zeros and load four times to get the error average. For subsequent measurements, only one shall be performed, unless the result is outside the specified tolerance or if the range of the five readings of the first measurements is greater than 0,1e. The maximum permissible error for standard weights shall not exceed 1/3 of the maximum permissible error for the corresponding load considered in the scale to be tested. The absolute error for the different standard weight designations is given in Annex I. These standard weight MPEs must therefore be compatible with the number of scales on the machine they are intended to control.

In addition, the density of the standard weights shall be such that a deviation of ±10 % of the density of the ambient air from its reference value does not result in a deviation of more than 1/4 of the permissible MPE when weighing the weight to the standard in air. To apply these requirements, the following table provides examples of the relationship between: Standardized weights must have one or more adjustment spaces. It shall be possible to seal the closure of these cavities; Closures must be watertight and airtight (e.g. by means of a fitting). The volume of the adjustment voids shall be at least equal to 5/100 of the volume of the standard weight. In addition, it is desirable that after the initial setting, a volume of at least 1/100 of the volume of the standard weight remains empty. (c) In the case of an extension device with closed sliding positions or mass switching mechanisms, any extension should result in an appropriate change of numbering. It should be possible to seal the housing and weight or mass adjustment activities. The area around the net quantity ratio must not contain information written as above and below by a space corresponding to the height of the number, and to the right and left twice as much space as the height of the number. The net weight of the quantity must exclude packaging or packaging and contain accurate information on the weight of the goods. The quantity for packages with a capacity of 5 cubic centimetres or less must be indicated on a label, tape, card or similar device attached to the means of containment.

Only the International System of Units should be used to report the net quantity. For example, materials for weights from 5 kg to 1 g must be made of Admiralty bronze, nickel, chromium alloy or austenitic stainless steel (Reference: Legal metrology (general rules) 2011 (megweights.gov.in)) (6) Any person authorized under this rule shall submit to the central government, at the end of the calendar year, a declaration of the quantity of special weights and measures it has exported, as well as personal data. to whom this export was made. Apply the test forces from zero to the maximum proportion of standard weight included. Determine the defect, and then remove the weights so that the idle indicator or, in the case of an instrument with a zero-tracking device, the display, for example, of 10th is reached. (i) The sensitivity of the machinery shall be tested at full load with the beam in a horizontal position. The addition of the weight referred to in columns 2 or 4 of Table 21 J shall result in a displacement of the needle corresponding to the minimum limits laid down in paragraph 3 (e). `net quantity` means, in the case of goods contained in a package, the quantity by weight, size or number of those goods contained in that package, excluding packaging or wrapping.

The net quantity must be declared by the food manufacturer in the form of exact weights or figures. (a) These weights shall be kept in their teak or other suitable non-corrosive material with a suitable wrap lined with chemically neutral velvet, chamois leather or soft plastic. The wood used in these boxes must be reasonably free of resins and volatile matter. Glue should not be used to fix velvet or other material. Weights must be placed in such a way that they cannot be moved during transport. Weights should be made from the five-segment wire for weights of 500, 50, 5 mg, two segments for weights of 200, 20, 2 mg and one segment for weights of 100, 10 and 1 mg. One end of the wire is bent at right angles to lift it with tweezers. If not, you could get in trouble because the government could knock on your door for violating the law`s measurement rules. And if you invest that little extra to ward off the threat, the money is lost without profit. Imagine packing a 4g candy with 4.1g net weight and you`ve lost about 7 candies (or Rs.7/- at typical prices) for every kg of candy. But not everything is bad and if you follow the rules, you can save yourself the hassle.