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G-18 Reverification Periods for Gas Volume Conversion Devices
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Reverification Periods for Gas Volume Conversion Devices, in PDF version, 71 KB
Table of Contents
1.0 Purpose
2.0 Authority
3.0 References
4.0 Definitions
5.0 Policy
6.0 Additional Information
Date: 2004-06-18
Bulletin: G-18
Category: Gas
Supercedes: See Clause 6.1
1.0 Purpose
The purpose of this bulletin is to communicate a new reverification period for mechanical-type and electronic-type gas volume conversion devices, excluding flow computers, and to provide some associated policies.
2.0 Authority
2.1 The reverification periods set out in this bulletin have been established pursuant to section 12 of the Electricity and Gas Inspection Act.
2.2 No requirement in this bulletin shall be construed as limiting the powers of the President in his capacity as director under the Electricity and Gas Inspection Act and Regulations.
3.0 References
3.1 Electricity and Gas Inspection Act (R.S. 1985, c. E-4), s. 12.
3.2 Electricity and Gas Inspection Regulations (SOR/86-131), ss. 3(1), s. 19.
4.0 Definitions
4.1 Verification: All the operations carried out by an inspector or accredited meter verifier having the
object of ascertaining and confirming that a meter (or ancillary device) entirely satisfies specified requirements, whether by 100% inspection or through the use of statistical sampling methods authorized by Measurement Canada. It also includes the application of a verification mark.
4.2 Reverification: Any subsequent verification of a meter (or ancillary device) that follows its initial verification.
4.3 Reverification Period: The period within which a meter (or ancillary device) shall be submitted to reverification or alternatively removed from service.
4.4 Volume Conversion Device: A device designed primarily for the purpose of converting a volume of gas measured at one set of conditions to a volume of gas at another set of conditions. The device incorporates integral (internal or external) temperature and/or pressure measurement sensors and may perform additional conversion functions relative to establishing volume at standard conditions, such as supercompressibility correction. The device is attached directly to or remotely associated with a single volumetric meter, and may contain an internal telemetering function (AMR or pulse initiator) or an externally attached telemetering device.
5.0 Policy
5.1 General
5.1.1 The President of Measurement Canada, in his capacity as director under the Electricity and Gas Inspection Act, may make determinations of meter reverification periods and extensions thereto.
5.1.2 The meters to which this bulletin applies shall remain subject to all relevant requirements of the Electricity and Gas Inspection Act and Regulations, including the provisions for measurement dispute investigation testing and device performance limits of error. Measurement Canada may inspect these devices for compliance with the requirements through performance monitoring in accordance with current work instruments and at times arranged by Measurement Canada regional/district management and contractors.
5.1.3 Devices may be inspected at their operational location, or at a test facility accredited by Measurement Canada. These inspections shall be performed using the 100% inspection method, or alternatively, performed using statistical sampling procedures that have been authorized by Measurement Canada for such purpose. (under review)
5.2 Reverification Period
5.2.1 All gas volume conversion device types, including rotary meter modules, shall be submitted to reverification, together with resealing or marking, or to cancellation of the seal or mark, as the case may require, within a period of seven (7) years.
5.3 Reverification Date Calculation
5.3.1 A volume conversion device shall be considered due for reverification on or before December 31 of the calendar year calculated as the sum of the device’s initial verification or most recent reverification year, as the case may be, and the applicable reverification period of seven years.
5.4 Effective Date of Implementation
5.4.1 The effective date of this bulletin is January 1, 2005. However, the provisions of this bulletin are not retroactive to previously verified (or reverified) devices currently assigned no fixed reverification period. Such devices will not be considered due for reverification until December 31, 2012, seven years after the date this bulletin comes into effect.
5.4.2 Modular-type rotary meter volume conversion devices previously assigned a six-year reverification period shall continue to retain this existing reverification period until expiry.
6.0 Additional Information
6.1 This bulletin supersedes the reverification periods for base pressure and base temperature correctors (i.e., gas volume conversion devices) as listed in the Consumer and Corporate Affairs Canada - Legal Metrology Branch document titled “Notice - Gas Meter Verification Periods”, dated 1986-01-25.
6.2 For additional information regarding this bulletin, please contact the Senior Program Officer responsible for gas measurement.
Alan Johnston
President
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Measurement Canada
