G-21 — Revision to the Policy for the Approval of Type of Gas Meters and Auxiliary Devices Equipped with Correction (Linearization) Functions
Category: Gaz
Bulletin: G-21
Document(s): See references in 4.0
Issue Date: 2012-10-22
Effective Date: 2012-10-22
Supersedes:
Table of Contents
- 1.0 Purpose
- 2.0 Scope
- 3.0 Authority
- 4.0 References
- 5.0 Background
- 6.0 Policy
- 7.0 Additional Information
1.0 Purpose
The purpose of this bulletin is to announce a revision to Measurement Canada's policy for type approval of gas meters and auxiliary devices (including flow computers and conversion devices) equipped with correction (linearization) functions.
2.0 Scope
This bulletin applies to all gas meters and auxiliary devices designed to correct measurement errors to as close to zero as possible. This correction function, also known as linearization, is currently subject to the requirements established in document PS-G-13 — Provisional Specifications and Procedures for the Approval of Correction Devices and Linearization Functions Incorporated in Meters and Flow Computers.
3.0 Authority
This bulletin is issued under the authority of section 12 of the Electricity and Gas Inspection Regulations.
4.0 References
5.0 Background
Until now, gas meters and auxiliary devices equipped with correction (linearization) functions were only eligible to receive conditional approval status due to the novelty of the technology employed (as required by the policies stipulated in bulletin GEN-06 — Application of New Specifications and Approval of Trade Measurement Devices that Incorporate Technologies not Covered by the Existing Specifications). On the basis of the positive results of the application of PS-G-13 by gas utilities, Measurement Canada has decided to remove the provisional status of these specifications. As such, the devices found in compliance with the requirements of PS-G-13 will receive full type approval.
6.0 Policy
6.1 The requirements of PS-G-13 are being integrated into updated type-approval specifications for gas meters that will also address the current undocumented practices followed by Measurement Canada and requirements that must be satisfied during type approval evaluation. The updated type-approval requirements will be published in the coming months. Until then, Measurement Canada is implementing the following policies for new type approval applications and existing conditional approvals, effective immediately.
6.2 Gas meters and auxiliary devices equipped with correction (linearization) functions that comply with the requirements set out in PS-G-13 and are not subject to the requirements of any other provisional specifications listed in bulletin GEN-06 shall be granted a full type approval. This policy applies to all devices that are about to be submitted or are currently being evaluated by Measurement Canada for the purpose of type approval.
6.3 Subject to clause 6.4, gas meters and auxiliary devices equipped with correction (linearization) functions that currently hold a conditional approval and are not subject to the requirements of any other provisional specifications listed in bulletin GEN-06 shall be granted a full approval. The Notice of Approval of these meters and devices shall be revised to reflect this change.
6.4 Where an existing conditional approval granted to a gas meter or auxiliary device is also subject to other provisional specifications listed in bulletin GEN-06, the Notice of Approval of the meter or the auxiliary device shall be reviewed and revised by Measurement Canada as necessary to indicate that the correction (linearization) function is fully approved, and is not the reason for which the approval is conditional.
7.0 Additional Information
For additional information regarding this bulletin, please contact the Senior Program Officer responsible for Gas Measurement.
Alan E. Johnston
President
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