Standards calibration — Mass
Only standards used by Measurement Canada inspectors and authorized service providers are calibrated by Measurement Canada's laboratories. Standards and apparatus must be authorized by and registered with Measurement Canada to qualify for this service.
For standards used to inspect class III, IIIHD and IIII scales:
- A direct comparison method is used to determine whether the tolerances in Part III or IV (as applicable) of Schedule IV of the Weights and Measures Regulations have been met.
For high precision standards used to inspect class II scales (typically used to weigh precious metals):
- A series of intercomparisons are used to determine whether the tolerances in Part I or II (as applicable) of Schedule IV of the Weights and Measures Regulations have been met.
ISO/IEC 17025 accreditation
Many of the calibration services offered by Measurement Canada's Approval and Calibration Services Laboratory (ACSL) are accredited to international standard ISO/IEC 17025—General Requirements for the Competence of Testing and Calibration Laboratories. This accreditation is granted by the Standards Council of Canada, Canada's accreditation body for calibration and testing laboratories via the Calibration Laboratory Assessment Service (CLAS) program of the National Research Council of Canada. Measurement Canada's ACSL is accredited to perform calibrations listed on its CLAS certificate, number 2009-03. All accredited calibrations are traceable to the International System of Units or to standards acceptable to the CLAS program. The certificate of calibration and designation created by Measurement Canada for each calibration of a standard that falls under this scope bears the CLAS logo.
The ISO/IEC 17025 standard requires that certain information be reported on the certificates issued for calibrations by accredited laboratories or be made available to clients if they request it. In its role as a regulator, Measurement Canada chooses what information is relevant to report on the certificates that it issues for calibrations. The ACSL keeps any information not presented on the certificate, but required under ISO/IEC 17025, and makes it available to its clients upon request. In accordance with Government of Canada privacy policies, this information is only provided to the requestor of the calibration service for the certificate in question. To request this information, add a comment on the Calibration Services Request form or contact the ACSL.
Request calibration services
You can notify the mass laboratory of when it can expect to receive your standard(s) in order to help expedite the calibration process.
Weight kit requirements
Ensure the weight kit meets the following requirements:
- The case and any boxes inside the case all have a permanent label which includes a visible serial number. All other numbers that may be confused with the serial number must be removed.
- All standards used to inspect class III, IIIHD and IIII scales are marked with a distinct serial number if they are greater than or equal to 1 g.
- Only standards listed on the previous certificate of calibration are included in the set of standards. If you need to add standards to a set, contact the ACSL.
Applicants are responsible for shipping arrangements and charges.
A completed copy of the Calibration Services Request form must accompany each set of standards. Ensure that an active/valid shipping account number for return shipping is identified on the form.
Cast iron standards 5 kg and larger used to inspect class III, IIIHD and IIII scales are to be sent to a local Measurement Canada office.
All other standards meeting the following criteria are to be sent to Measurement Canada's ACSL in Ottawa:
- Stainless steel standards 5 kg and smaller that are part of a weight kit used to inspect class III, IIIHD and IIII scales
- All standards used to inspect class II scales
Address of the ACSL:
Measurement Canada, Approval and Calibration Services Laboratory
151 Tunney's Pasture Driveway
Packages not meeting the requirements listed below may not be accepted.
- All standards are stored within a single primary case and packaged in a reusable container suitable for shipping to ensure they are protected.
- Containers must not be sealed with nails. Containers with a hinged door or cover fastened with screws are acceptable.
- Provisions for repackaging and the return of standards must be made before delivery. See the Return of standards section for more details.
Return of standards
Arrangements for the return of your standards are your responsibility. You can make them with Measurement Canada as long as you provide an account number and waybill in advance.
Any cost associated with the repackaging of standards is your responsibility.
- Authorized service provider calibration checklist
- Service standards
- Customer feedback on laboratory services
- A-2 — Calibrations of Standards and Measuring Apparatus Owned and Used by Authorized Service Providers to Conduct Inspections
- Laboratory Manual for the Evaluation of Weight Kits
- Measurement Canada's CLAS certificate
- Date modified: