Field inspection manual—volumetric measuring devices–Part 2, Section 4

Part 2, section 4, type 55.10, 55.11— Truck mounted meters, gravity supplied

Application

Meters used for the measurement of liquids which are installed without upstream pumping equipment. They may be used for the measurement of petroleum products, and other liquids such as chemicals, herbicides and pesticides which are liquid at ambient temperature and pressure.

Equipment

Appropriate volumetric proving standards, Mouvex proving system and a certified thermometer (0.1°C).

Note: Proving standards must each be verified and designated as a local standard by Measurement Canada. Mobile prover standards require re-certification once every four years. When selecting the appropriate capacity of proving standard a minimum test volume should equal or exceed a one minute run at maximum operating rate. Consult bulletin V-24 for additional information.

Use

  • Device is approved for trade use: NoA, W&M Act Section 8
  • Device and components are suitable for the actual use: NoA, R-271, R.272
  • Device has been initially inspected (if applicable) and bears the initial inspection marks: R-29, bulletin V-8, bulletin V-9
  • Flow rates are within approved range: NoA, R.290
  • ATC (seasonal and partial conversion): bulletin V-19
  • Register with ATC uses a volume correction factor authorized for the actual liquid: R.235 / SVM.2-4, bulletins V-10, V-12, V-13 and V-18
  • Register with ATC - Measurement of two liquids is prohibited if their VCF differ by more than 0.25%: SVM 2-26

Visual exam (marking and labelling)

  • Device is marked with the required information (manufacturer's name, model and serial number, approval number(s), maximal and minimal flow rate, volume corrected to 15°C, etc.): NoA, R.21
  • Information is located as required and marking is permanent (if applicable): R.18
  • Marking plate is permanently affixed to the device: R.18
  • Initial inspection marks (dye or approved label): R.29
  • Marking manufacturer's name or trade mark and model number on test well: SVM.2-15
  • Units of measurement and, if applicable, the ¢ per litre or $ per litre face plate markings are appropriate (location, size, appropriate decimal and number of places): R.135, R.136, R.137
  • Labelling / marking of multiple outlet systems: R.282
  • Marking device usage restriction: NoA, R.70

Note: The requirement of SVM.2-15 for marking test thermal well is no longer applied.

Visual examination (printers, tickets, consoles)

  • Mandatory interlocked printer on vehicle mounted meter: R.294
  • Tickets are appropriate to the printing device: R.149
  • Information are printed as required: R.129, R.295, SVM.1-27, SVM.2-27, bulletin V-20
  • Quantity printed with adequate number of digits, decimals: R.126, bulletin V-7

Note: A clear message must be printed on the ticket if a delivery is done when the meter is in the testing / calibration mode.

Visual examination (seals)

  • Measuring element/calibration adjustment is sealed: R.235
  • Register - Means of adjustment used for processing pulses is sealed: SVM.1-8, SVM.1-9
  • Means of adjusting ATC - Accessible and sealable: SVM.2-7
  • Sealing ATC sensor / well assembly: SVM.2-10
  • Sealing flow control valve (if applicable): R.280

Note: Calibration and settings of metrological functions must not be accessible through external devices without breaking seals or without being logged (event logger) as prescribed. Device must not operate normally if left in calibration mode.

Note: NoA must be consulted as well for special sealing provisions.

Visual examination (installation—general)

  • Device is installed in accordance with restrictions and conditions listed in the notice of approval and in accordance with manufacturer's instructions: NoA, R.68, R.69, R.70
  • Device is adequately secured; is protected against abnormal environmental factors; is connected to an adequate and compatible electrical supply as prescribed by the manufacturer; and attached components do not adversely affect its performance: R.124, R.141, R.142
  • Device's primary register is positioned for customer view (if applicable): R.143, R.144
  • Minimum graduation is in compliance with requirements: R.68(2), R.126, SVM.1-20
  • Increments of registration (displayed / printed electro-mechanical): bulletin V-7
  • Means of registration of total price - sufficient number of digits: SVM.1-21
  • Device / system has convenient means to allow for testing and inspection: R.284
  • Blending metering systems - if one meter is equipped with ATC, all meters must be so equipped: SVM.1-27

Visual examination (settings)

  • Multi products / Multi meters - Selection of unit price and adjustment are interlocked: SVM.1-16
  • Register used with more than one meter or liquid prevents the delivery of more than one liquid at a time: SVM.1-18
  • Multi products - ATC - Selection of coefficient of expansion is interlocked: SVM.2-12
  • Adjacent linearization factors must not deviate by more than 0.25%: SVM.1-10
  • Means of adjustments set both gros and net registration: SVM.2-28

Note: If the lowest and the highest linearization factor set values exceed 0.25%, additional tests at mid-flow range may be warranted.

Note: The piping of a multi-product / multiple meter systems must be equipped with the necessary automatic solenoid valves or other means interfaced with the electronic register to make the interlocking system operational as prescribed by the requirements.

Visual examination (upstream and downstream piping and hoses)

  • Short and unencumbered suction piping: R.273
  • Piping and accessories are installed so as to minimize the passage of air and gaz: R.274
  • Adequate air prevention and elimination system is in place; air eliminator has not been obstructed (if applicable): R.276, R.279
  • Filter, strainer, or other approved means located immediately upstream from the meter: R.277
  • Sealed flow control valve (if necessary): R.280
  • All product is delivered downstream from the transfer point; all product is retained upstream the transfer point; and piping / hose downstream the meter can be readily inspected: R.282
  • Multiple outlet systems comply with installation and marking requirements: R.282
  • Quick-acting valve installed near outlet for inspection purpose: R.283
  • A vacuum breaker is installed at the outlet of the meter to ensure a positive pressure at the inlet of the meter: R.275
  • Automatic means to stop liquid flow when missing pulses are detected: SVM.1- 37
  • Multi-product systems - Interlocked valves to prevent the delivery of more than one liquidSVM.1- 37
  • Automatic valve having throttling effect is located downstream from the meter: R.285
  • Quality short dry hose is used: R.287
  • ATC temperature sensor and test well are installed within one metre of the meter (if applicable); no components are installed between the ATC sensor and the meter: SVM.2-23, SVM.2-25
  • Test thermal well is installed adjacent to the sensor and so that it will retain thermal conducting fluid during a test (if applicable): SVM.2-24
  • ATC requirements for blending metering systems composed of more than one meter - all meters must be equipped with ATC: SVM.2-27

Note: Piping, valves and other components must be examined for leakage. For safety and accuracy, any leakage should be fixed before inspection.

Performance

Note: Certified volumetric provers and measures are required to be wet and dripped in accordance to their verification certificate: STP- 22

Volume correction for the expansion or contraction of the prover shell need to be calculated into the observed volume reading: STP-23

In-service limits of error apply to tests performed in the field: bulletins V-3 and V-23

The top opening of the open prover must be at a level lower than the outlet of the meter. As an alternative, a Mouvex Pump can be used. Consult: STP-37

  • Return-to-zero test (mechanical register): STP-1
  • Interlock test: STP-2
  • Segment Test (if electronic): STP-3
  • Slow Flow Test: STP-4
  • Fast Flow Test: STP-5
  • Intermediate Flow Test (if necessary): STP-6
  • Repeatability Test (if necessary): STP-7
  • Split Compartment / Out of Product Test: STP-8
  • Agreement Between Registrations Test: STP-9
  • Computed Value Test (if applicable): STP-10
  • Delivery Cross-over Test (if applicable): STP-15
  • Product Blend Test (if applicable): STP-16
  • ATC Test (if applicable): STP-18
  • ATC Temperature Sensor Failure Test (if applicable): STP-19
  • EM / RF Interference Test (if applicable): STP-20

Note: Annotate Inspection Certificate with products measured during the test and which may be measured for trade use. Association of programmed calibration factors verified according to each product is also of value.

Meters used to measure more than one liquid must be tested on the highest and lowest grades in term of viscosity. Meters with a single setting (K factor) that are used to measure several grades of a product must be capable of performing within tolerances on all grades. Meter(s) equipped with a register having multiple settings for multiple liquids must be interlocked so that the adjustment selection corresponds to the liquid or meter selected. See SVM.1-16, SVM.1-18, SVM.1-38 and SVM.2-12.

Combination pump/gravity meter installation

Verify that system complies with IPO's for both pump and gravity meters. Confirm that components from one system cannot interfere with the operation of the other system.

Particular products and metering systems

Herbicides, fertilizers and chemical metering systems

Some of these products may require the use of stainless steel provers or pipe provers. Consult the owner of the equipment for safe handling and disposal of the product and cleaning of test equipment before and after the tests. Ensure hoses and seals are compatible with products. Consult the Material Safety Data Sheet (MSDS) for safety measures.

  • See particularities described in: STP-38

Metering systems for engine oils and other lubricants

As for blending systems, certain meters can be used to measure several grades of lubricants. In this case, they must be tested for accuracy on the two grades that represent the extremes in terms of viscosities and densities. They must perform within applicable tolerances. Meter(s) equipped with a register having multiple settings for multiple liquids must be interlocked so that the adjustment selection corresponds to the liquid or meter selected. See SVM.1-16, SVM.1-18, SVM.1-38 and SVM.2-12.

  • See particularities described in: STP-25

Volumetric testing of lubricating oil meters

Volumetric testing requires to fully drain, flush / clean with solvent, wet and drip the provers (standard) between each test. Be careful of possible contamination. The device owner must be made aware of the flushing solvent in use and if not acceptable must provide an alternate agent. Arrangement must be made with the device owner for safe disposal of the solvent. Field tests are performed using the product currently measured by the meter.

Meters for lubricants can be tested using the gravimetric procedure described in STP-27.

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