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

DIVISION XVolumetric Liquid Measuring Machines in General

Interpretation

232 In this Division, machine means a volumetric liquid measuring machine and includes a volumetric liquid meter or a measuring tank for use in trade.

Design, Composition and Construction

233 A machine shall be designed and constructed to ensure complete delivery of the measured liquid and to prevent delivery of any unmeasured liquid.

234 All movable capacity indicators and means of adjustment on a machine shall be sealable.

• 235 (1) Component parts of a machine the removal or alteration of which could have an effect on the accuracy of measurement of the machine shall be sealable.

• (2) Subsection (1) does not apply to a meter designed for measuring liquid food commodities.

236 Except as otherwise authorized by specifications established by the Minister, a machine shall register in units of volume of liquid at the temperature and pressure of the liquid in the measuring element of the machine.

Performance

237 A machine may be tested and calibrated using a liquid other than the liquid that the machine will measure in trade if the test liquid has hydraulic properties similar to the liquid that the machine will measure in trade or the test liquid is used with a correction factor that has been specified by the Minister.

Installation and Use

238 Where a machine is incorporated into a measuring system, the component parts of the system, including the liquid supply tank and any pump, piping, valve or delivery hose, shall be installed and used so as not to cause the machine to cease to measure accurately.

239 Unless otherwise authorized by specifications established by the Minister, a machine shall be installed so as to prevent the inter-mixing of liquids therein unless it is a machine approved for that purpose.

240 When a machine is installed in conjunction with piping other than a delivery hose or a short jumper hose, the piping shall be of rigid material.

DIVISION XIVolumetric Liquid Meters

Interpretation

241 In this Division,

meter

meter means a volumetric liquid measuring machine for use in trade that is of the meter type or incorporates a meter; (compteur)

registration

registration includes both visual indication and recorded representation of volume, unit price or monetary value. (enregistrement)

Design, Composition and Construction

242 The rated maximum flow of a meter shall be such that, when it is tested using refined petroleum products with normal lubricating properties such as kerosene or fuel oil, the meter will measure accurately without abnormal wear, and the meter shall be de-rated if necessary for use on products with lesser lubricating properties.

• 243 (1) The rated minimum flow of a meter designed to measure liquids other than liquefied gases shall be 20 per cent or less of the rated maximum flow of the meter.

• (2) Subject to subsection (3), the rated minimum flow of a meter designed to measure liquefied gases shall be 33 per cent or less of the rated maximum flow of the meter.

• (3) The rated minimum flow of a meter with a rated maximum flow of 90 L or less per minute that is designed to measure liquefied gases and to dispense liquefied gases to motor vehicles shall be 13 L or less per minute.

244 Unless otherwise authorized by specifications established by the Minister, a meter shall have an integral filter or close-coupled strainer appropriate to the type, design and size of the meter.

245 Unless otherwise authorized by specifications established by the Minister, all meters except slow-flow meters and slow-flow dispensers shall have an automatic air-vapour eliminator and a meter for liquefied gases shall also have a combination differential-pressure and back-pressure valve.

246 Any accessory for a liquid meter that can affect the accuracy of the meter shall be sealable.

247 [Revoked, SOR/93-234, s. 2]

248 [Revoked, SOR/90-118, s. 31]

• 249 (1) Subject to subsection (2), the means of registration on a meter shall be capable of advancement only by the liquid passing through the meter.

• (2) A meter register may be designed to be reset to zero by mechanical advancement of the register elements if, during the resetting,

  • (a) the elements of registration are obscured until the zero position is reached; or

  • (b) the advancing movement, once started, cannot be stopped until the zero position is reached.

250 The indications on any resettable register, totalizer or ticket printer on a meter that is designed to measure flow in both directions shall advance or reverse according to the flow of the liquid.

251 When a meter has a totalizer or preset register, it shall be clearly differentiated from the delivery register.

252 A resettable register shall have means to return the register accurately to zero, and the money register of a computing type register shall return to zero at the same time that the quantity register is returned to zero.

253 A computing type register shall be designed to prevent any change of the price setting during a delivery and so as to automatically display the unit price at which the register is set to compute.

254 A meter with a rated maximum flow of 350 L or less per minute that is intended to be used to measure and deliver motor fuel to motor vehicles, watercraft and aircraft shall be designed to be inoperable after a delivery until the register is reset to zero.

255 [Revoked, SOR/93-234, s. 2]

256 Unless otherwise authorized by specifications established by the Minister, a ticket printer shall be interlocked so that it can

• (a) print only the quantity delivered; and

• (b) deliver only the quantity for which a ticket is printed.

257 A meter that has a ticket printer shall be so designed that a jammed ticket can be removed without breaking the examination seals on the means of adjusting the registration.

258 Where an automatic temperature-compensated or other type of compensated register is installed on a meter, an uncompensated register shall also be provided that indicates the uncompensated volume measured by the meter.

259 The purchaser’s cumulative register on a key-operated self-serve meter shall be designed so that it is readily visible to the purchaser at the time of delivery and will permit comparison with the quantity indication of the delivery shown by the primary indicator.

260 A meter shall have a sealable means of adjustment that will permit the meter to be adjusted to within 0.05 per cent of the quantity dispensed through the meter.

Performance

261 When a meter is tested for acceptance limits of error at any flow rate between its rated maximum flow and its rated minimum flow using a known test quantity of liquid set out in Column I of an item in the applicable table to sections 265 to 270, the meter is within the acceptance limits of error in respect of that quantity if the quantity registered by the meter does not differ from the known test quantity by an amount in excess of the amount set out in Column II of that item.

262 When a meter is tested for in-service limits of error at any flow rate between its rated maximum flow and its rated minimum flow using a known test quantity of liquid set out in Column I of an item in the applicable table to sections 265 to 270, the meter is within the in-service limits of error in respect of that quantity if the quantity registered by the meter does not differ from the known test quantity by an amount in excess of the amount set out in Column III of that item.

263 Where a meter is tested for acceptance limits of error or in-service limits of error using three consecutive tests conducted at any single rate of flow or at any flow rate of the same pattern that falls between its rated maximum flow and its rated minimum flow, the spread of the test results shall not exceed two fifths of the applicable limit of error for the meter.

264 [Revoked, SOR/90-118, s. 35]

• 265 (1) Subject to subsection (4), the limits of error set out in the tables to subsections (2) and (3) apply to slow-flow dispensers incorporating either meters or self-measuring pumps, dispensers for motor fuel of the service station type, meters on refuellers for small aircraft and boats, meters on vehicle tanks and to all other meters for use in measuring automotive or petroleum liquids in retail trade and that are not otherwise mentioned in the tables in this Division.

• (2) The limits of error set out in the following table apply to meters that register in metric units of volume:

  	Column I	Column II	Column III
  Item	Known Test Quantity	Acceptance Limits of Error	In-Service Limits of Error
  	Litres	Millilitres	Millilitres
  1	0.10	2	4
  2	0.20	2.5	5
  3	0.50	6	12
  4	1	10	20
  5	2	15	30
  6	5	30	60
  7	10	40	80
  8	20	50	100
  9	50	100	200
  10	100	220	440
  11	250 or more	3/16% of known test quantity	3/8% of known test quantity

• (3) The limits of error set out in the following table apply to meters that register in Canadian units of volume:

  	Column I	Column II	Column III
  Item	Known Test Quantity	Acceptance Limits of Error	In-Service Limits of Error
  	Pints	Fluid Ounces	Fluid Ounces
  1	½	1/8	¼
  2	1	¼	½
  	Quarts
  3	1	3/8	¾
  4	2	5/8	1¼
  	Gallons
  5	1	1	2
  6	2	1¼	2½
  7	5	2	4
  8	10	3½	7
  9	20	6½	13
  10	50 or more	3/16% of known test quantity	3/8% of known test quantity

• (4) The acceptance limits of error set out in Column II of the tables to subsections (2) and (3) apply only to tests made under controlled conditions such as bench tests, and for tests for acceptance limits of error under other conditions, the limits of error set out in Column III of those tables shall apply.