Government of Canada / Gouvernement du Canada
Symbol of the Government of Canada

Search

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

Regulations are current to 2022-06-01 and last amended on 2019-06-17. Previous Versions

PART VSpecifications Relating to Devices (continued)

DIVISION VIAutomatic Weighing Machines (continued)

Performance (continued)

[
  • SOR/2005-297, s. 42(F)
]

 Subject to sections 188, 192 and 193, the limits of error set out in the following table apply to all machines registering in avoirdupois units of mass or weight:

TABLE

Column IColumn IIColumn III
ItemKnown Test LoadAcceptance Limits of ErrorIn-Service Limits of Error
PoundsOuncesPoundsOuncesPoundsOunces
10.10.001 or1/640.001 or1/64
220.001 or1/640.001 or1/64
30.150.001 or1/640.002 or1/32
40.20.001 or1/640.002 or1/32
540.001 or1/320.002 or1/32
60.30.002 or1/320.002 or1/32
70.50.002 or1/320.003 or1/32
80.70.002 or1/320.003 or1/16
9120.002 or1/320.003 or1/16
101.00.003 or1/320.004 or1/16
111.50.003 or1/160.005 or3/32
1220.004 or1/160.006 or3/32
1330.005 or1/160.008 or1/8
1450.006 or3/320.011 or3/16
1570.007 or1/80.014 or7/32
16100.009 or5/320.018 or5/16
17150.013 or3/160.024 or3/8
18200.017 or¼0.030 or½
19300.025 or3/80.041 or5/8
20500.039 or5/80.060 or1
21700.053 or7/80.077 or
221000.075 or0.100 or
23Over 100 pounds0.075% of known test load0.10% of known test load
  • SOR/89-570, s. 6(F)
  • SOR/98-115, s. 19
  •  (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
  • SOR/2017-17, ss. 7(F), 20(F)

 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 equipped with a self-indicating or semi-self-indicating means of registration is tested by one of the following methods, the acceptance limits of error 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:

  • (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.

  • SOR/89-570, s. 6(F)
  • SOR/2017-17, s. 8
  • SOR/2018-252, s. 4(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 limits of error or in-service limits of error is a weight equivalent to the lesser of 0.05 per cent at the capacity of the machine and one minimum increment of registration.

  • (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)
  • SOR/2017-17, ss. 9, 20(F)
 
Date modified: