Weights and Measures Regulations (C.R.C., c. 1605)

Regulations are current to 2016-08-15 and last amended on 2014-08-01. Previous Versions

  •  (1) An electronic machine shall perform within the applicable limits of error, when tested after being calibrated and zeroed, under relative humidity conditions between 10 per cent and 95 per cent, and under one of the following operating conditions:

    • (a) the ambient temperature range is -10°C to +40°C, unless expressly specified otherwise on the approval application and marked on the machine;

    • (b) if the specified minimum temperature is lower than -10°C or the specified maximum temperature is more than +40°C, the machine shall bear markings specifying the minimum and maximum temperatures and shall be approved for use within this expanded temperature range, if Measurement Canada laboratories are equipped to test at those temperatures;

    • (c) when a machine meets the conditions described in paragraphs (a) and (b), it may be used beyond the approved minimum and maximum temperatures if it continues to perform within allowable limits of error; or

    • (d) if the specified minimum temperature is higher than -10°C or the specified maximum temperature is less than +40°C, the machine shall bear markings specifying the minimum and maximum temperatures and shall only be approved for use within this reduced temperature range.

  • (2) The difference between the specified minimum and maximum temperatures for an electronic machine shall not be less than

    • (a) 5°C for machines with more than 50,000 increments of registration;

    • (b) 15°C for machines used to weigh precious metals and other commodities of comparable value; and

    • (c) 30°C for machines used to weigh commodities other than precious metals or commodities of comparable value.

  • (3) An electronic machine shall perform within the applicable limits of error when tested at a constant ambient temperature that does not vary more than 5°C.

  • SOR/2012-28, s. 9.
  •  (1) When a load remains on an electronic machine, the difference between the indication that is obtained at the moment that the load is applied and the indication that is obtained eight hours after its application shall not exceed the permissible acceptance limit of error for the applied load.

  • (2) The variation on returning to zero after the removal of a load which has remained on an electronic machine for half an hour may not exceed one half the value of the minimum increment of registration.

  • (3) The weight indication at zero or near zero on an electronic machine shall not vary by more than the value of the minimum increment of registration for a difference in ambient temperature of 5°C.

  • SOR/2012-28, s. 9.

 An electronic machine shall perform within the applicable limits of error when scanned at a distance of 2 metres with

  • (a) a 460-MHz (commercial) 4-watt hand-held communicator; and

  • (b) a 27-MHz (citizens’ band) 4-watt hand-held communicator.

  • SOR/2012-28, s. 9.

 When a machine that is of the self-indicating or semi-self-indicating type is tested by

  • (a) the removal of a known test load, in the case of a machine that is normally used for weighing following the addition of load, or

  • (b) the addition of a known test load, in the case of a machine that is normally used for weighing following the subtraction of load,

the acceptance and in-service limits of error are 1.5 times the limits of error set out in the tables to sections 176 and 177 and set out in sections 188 and 192.

  • SOR/89-570, s. 6(F).
  •  (1) Subject to subsections (2) and (3) and sections 188 and 192, the minimum limit of error when a machine is tested for acceptance or in-service limits of error is a weight equivalent to 0.05 per cent at the capacity of the machine or one minimum increment of registration, whichever is the lesser.

  • (2) The minimum limit of error for a railway track scale used exclusively in weighing railway cars is the greater of 15 kg or 30 pounds, and the value of the minimum increment of registration.

  • (3) In a strain test at a heavy duty scale, there shall be no minimum limit of error in respect of the known test load that is added to the strain load and the limit of error for a machine with digital registration shall not be increased as described in section 184.

  • SOR/89-570, s. 6(F);
  • SOR/90-118, s. 23;
  • SOR/93-234, s. 2(F).

 On removal of all load from a machine, the means of registration of the machine shall immediately return to zero registration within a range equivalent to the greater of

  • (a) ¼ of the value of the minimum increment of registration, and

  • (b) 0.01 per cent of the capacity of the machine.

  • SOR/90-118, s. 24.

 Subject to subsection 182(3), where a machine has digital increments of registration, the acceptance and in-service limits of error applicable to the digital registrations of the machine shall be increased beyond the limits of error otherwise applicable to the digital registrations of the machine by the equivalent of one-half the finest digital increment of registration.

  • SOR/89-570, s. 6(F).
  •  (1) Where a test consisting of the application to a machine of the same test load up to 10 times is carried out under conditions approximating conditions of normal use, the difference between the least registered load and the greatest registered load shall not exceed the absolute value set out in column II or III, as applicable, of an item of the appropriate table to sections 176 and 177 that corresponds to the known test load set out in column I of that item that is equivalent to the greatest registered load.

  • (2) Subsection (1) does not apply to the testing of a machine in accordance with subsection 189.2(1), 190(2) or 191(1) or (2).

  • SOR/89-570, s. 6(F);
  • SOR/90-278, s. 5;
  • SOR/93-234, s. 2(E).

 An electronic machine shall be able to withstand vertical forces up to 150 per cent of its rated capacity without affecting its calibration.

  • SOR/2012-28, s. 10.

 An electronic machine shall be able to operate within plus or minus 10 per cent of its voltage rating and within plus or minus 2 per cent of its frequency rating.

  • SOR/2012-28, s. 10.

 Where a hopper scale or a tank scale referred to in subsection 172(2) has a capacity equal to or greater than 15 000 kg or 35,000 pounds,

  • (a) the acceptance limits of error for that scale are the greater of 0.05 per cent of the known test load and the value of the minimum increment of registration; and

  • (b) the in-service limits of error for that scale are the greater of 0.10 per cent of the known test load and the value of the minimum increment of registration.

  • SOR/89-570, s. 6(F);
  • SOR/90-118, s. 25.

 Where a static test is conducted on a railway track scale that is designed for in-motion weighing, the acceptance limits of error for the scale are those prescribed by section 174 and the in-service limits of error for the scale are those prescribed by section 175.

  • SOR/89-570, s. 6(F);
  • SOR/90-278, s. 6.
  •  (1) In sections 189.2, 190 and 191,

    reference car

    reference car means a railway car the weight of which has been determined in relation to a relevant local standard. (wagon de référence)

  • (2) In sections 190 and 191,

    net known test load

    net known test load means the difference between the static weight of a loaded reference car and the static weight of an empty reference car. (charge connue nette)

  • SOR/90-278, s. 6.
  •  (1) Subject to subsection 182(2), where a railway track scale that is designed for in-motion weighing of uncoupled railway cars is tested dynamically, the acceptance limit of error and in-service limit of error for the scale are 0.15 per cent of the known weight of each reference car.

  • (2) The limits of error set out in subsection (1) apply to a test that consists of five reference cars passing over the railway track scale up to 10 times, under conditions approximating conditions of normal use.

  • (3) The reference cars referred to in subsections (1) and (2) shall be representative of the types and weight range of the railway cars for which the railway track scale is intended to be used.

  • SOR/90-278, s. 6.
  •  (1) In this section, unit train or UT means a train composed of at least 10 coupled railway cars of the same type carrying the same product to one consignee. (train-bloc or TB)

  • (2) Where a railway track scale that is designed for the in-motion weighing of unit trains is tested dynamically, the acceptance limit of error and in-service limit of error for the scale are 0.15 per cent of the sum of the net known test load of all of the reference cars in the train that are weighed.

  • (3) The test referred to in subsection (2) shall not be conducted more than 10 times.

  • (4) The reference cars and the length of the train used in the test referred to in subsection (2) shall be representative of the types and weight range of the railway cars and length of the trains for which the railway track scale is intended to be used.

  • SOR/89-570, s.6(F);
  • SOR/90-278, s. 6.
 
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