The NRC is discontinuing the Calibration Laboratory Assessment Service (NRC CLAS) and is assisting clients that are accredited by the Standards Council of Canada (SCC) to move their assessments fully to the SCC.
Effective April 30, 2026, SCC will take full responsibility for the assessment and the accreditation for these laboratories to ISO/IEC 17025.
If you want to learn more about accreditation to ISO/IEC 17025 for calibration and testing laboratories in Canada, contact:
- Abdel Kassou, Director, Accreditation Services, SCC abdel.kassou@scc-ccn.ca
- Andrew Lewis, Accreditation Manager, Canadian Association for Laboratory Accreditation, alewis@cala.ca
For information about the NRC Metrology Research Centre, contact: Kevin Thomson, Director of Research and Development, kevin.thomson@nrc-cnrc.gc.ca.
Table of contents
- Application package
- CLAS requirements documents
- Assessment records
- Appendix A: Application form - new applicants
- Appendix B: Application form - scope extensions
- Appendix C: Application form - group accreditation
- Appendix D: Requested scope of accreditation and CLAS Certificate
- Appendix E: SAMPLE Requested Scope of Accreditation and CLAS Certificate
- Appendix F : Measurement Capability Categories
CLAS requirements for applications - Calibration laboratory accreditation by CALA or SCC through CLAS
CLAS Requirements Document 1, August 2025
Application package
If the applicant laboratory is part of a company or is a separate unit within an organization, the term "laboratory", refers only to the calibration laboratory for which accreditation is sought and not to the parent organization or other affiliations.
A new application for accreditation through CLAS shall include:
- the signed Application form – new applicants (Appendix A) (PDF, 172 KB)
- the completed Requested scope of accreditation and CLAS Certificate (Appendix D) (PDF, 141 KB). Please ensure sufficient technical information is provided in the requested scope to identify the types of instruments and/or standards being calibrated and the types of standards used; see example in Appendix E: Sample - Requested scope of accreditation and CLAS Certificate
- the completed CLAS 1510E Assessment Guide. To obtain a copy of CLAS 1510E Assessment Guide, please contact CLAS with proof of purchase of ISO/IEC 17025
- the laboratory management system documentation
Scope extension requests shall include:
- the signed Application form – scope extensions (Appendix B) (PDF, 156 KB)
- the completed Requested scope of accreditation and CLAS Certificate (Appendix D) (PDF, 141 KB). Add the new parameters desired. Please ensure sufficient technical information is provided in the requested scope to identify the types of instruments and/or standards being calibrated and the types of standards used; see example in Appendix E: Sample - Requested scope of accreditation and CLAS Certificate
Group accreditation applications shall include:
- the signed Application form – new applicants (Appendix A) (PDF, 172 KB)
- the signed Application form – group accreditation (Appendix C) (PDF, 181 KB)
- the completed Requested scope of accreditation and CLAS Certificate (Appendix D) (PDF, 141 KB) per location. Please ensure sufficient technical information is provided in the requested scope to identify the types of instruments and/or standards being calibrated and the types of standards used; see example in Appendix E: Sample - Requested scope of accreditation and CLAS Certificate
- the completed CLAS 1510E Assessment Guide. To obtain a copy of CLAS 1510E Assessment Guide, please contact CLAS with proof of purchase of ISO/IEC 17025
- the laboratory management system documentation
CLAS requirements
For the assessment, a laboratory must be prepared to provide the following supporting information:
- quality management system;
- calibration procedures;
- examples of completed calibration certificates (CLAS Requirements Document 6);
- evidence of metrological traceability (CLAS Requirements Document 9);
- evidence that measurement uncertainties are evaluated and reported in a manner consistent with the GUM: Guide to the Expression of Uncertainty in Measurement and ILAC P14, ILAC Policy for Uncertainty in Calibration;
- records of proficiency testing (CLAS Requirements Document 7); and
- evidence of conformance with the specific requirements for calibration laboratories operating at multiple locations, if applicable, (CLAS Requirements Document 10).
Assessment information
All information provided to CLAS and the accreditation body is confidential.
The information provided in this application has several purposes:
- to ensure that an applicant has examined each of the requirements and is reasonably confident of conformance with each one
- to enable CLAS staff to detect and advise the applicant of any potential nonconformities, and thus provide better assurance of a successful on-site assessment
- to provide the on-site assessment team with the information needed to carry out an effective assessment
- to provide the basis for confirming consistency between the documented and assessed capability of a laboratory
CLAS will inform the laboratory of the names of the members of the assessment team and the organization they belong to, sufficiently in advance to allow the laboratory to object to the appointment of any particular assessor or expert. Any such objection by the laboratory will be addressed by the Leader, Assessment Services.
Appendix A: Application form – new applicants
Appendix A: Application form – new applicants (PDF, 172 KB)
The following content is not a fillable form. It is copied from the Appendix A PDF form and is included below as reference only.
Text content of the Appendix A PDF form as reference only
To obtain accreditation and a CLAS Certificate, organizations have two accreditation bodies to choose from. Please make your selection below.
- Canadian Association for Laboratory Accreditation (CALA)
- Standards Council of Canada (SCC)
Laboratory legal name: Legal status: Corporation / Sole proprietorship / Partnership / Cooperation / Government Postal / street address: City and province or state: Postal / zip code and country: Hereby applies for accreditation and CLAS Certificate as a calibration laboratory for the scope of measurement capabilities outlined in the attached Requested scope of accreditation and CLAS Certificate.
With this application, the applicant agrees to the following items by initialing the boxes:
I agree to the use of fax technology if required for assessment communication Client fax number: I agree to the use of email if required for assessment communication. Client email address: This laboratory provides calibration services to all interested parties.
This laboratory requires metrological traceability of its primary reference standard of mass to reference standard MR‑1 or MR‑2 and/or of temperature to reference standards VS767_203 or VS767_1808, and evaluation against Measurement Canada RC-01- Conditions and administrative requirements for the recognition program of calibration results from CLAS laboratories.
Note: When this item is selected, a copy of this application must be submitted by the applicant to Measurement Canada, Approval and Calibration Services Laboratory (ACSL).
Laboratory contact person Name: Title: Email: Telephone: Once accreditation and CLAS Certificate is granted, the applicant agrees to the following obligations:
- To conform with the requirements and conditions contained in the latest edition of ISO/IEC 17025, the CLAS Requirements Documents, and in the latest editions of the accreditation body requirements
- To comply with, if applied for, the requirements and conditions contained in the latest edition of the Measurement Canada RC-01 – Condition recognition program of calibration results from CLAS laboratories, to certify and designate as a local standard any standard as per the scope of the program, that has been calibrated in relation to a reference standard as accurate within the prescribed tolerances
- To pay the required fees to CLAS
- To cooperate with CLAS and the accreditation body in the scheduling of assessment visits and the witnessing of services when requested by CLAS. This applies to all premises where calibrations take place.
- To provide access to information, documents and records as necessary for the assessment and maintenance of the accreditation
- To cooperate with CLAS and the accreditation body in maintaining the integrity of the accreditation program
- To claim accreditation only with respect to the scope for which it has been granted
- To notify CLAS, without delay, of any significant changes relevant to its accreditation, in any aspect of its status or operation relating to:
- its legal, commercial, ownership or organizational status
- the organization, top management and key personnel
- main policies
- resources and premises
- scope of accreditation
- matters that may affect the ability of the laboratory to fulfil requirements for accreditation
- That accreditation may be withdrawn, on failure of a laboratory to conform with the foregoing, subject only to the rights of appeal set out in the accreditation body requirements
Authorized representative of applicant laboratory Name: Title: Date: Email: Telephone: Signature:
Appendix B: Application form – scope extensions
Appendix B: Application form - scope extensions (PDF, 156 KB)
The following content is not a fillable form. It is copied from the Appendix B PDF form and is included below as reference only.
Text content of the Appendix B PDF form as reference only
Laboratory legal name: CLAS file number: CLAS Certificate number: Hereby applies for an extension of the scope of measurement capabilities outlined in the attached Requested scope of accreditation and CLAS Certificate.
This laboratory requires metrological traceability of its primary reference standard of mass to reference standard MR‑1 or MR‑2 and/or of temperature to reference standards VS767_203 or VS767_1808, and evaluation against Measurement Canada RC-01- Conditions and administrative requirements for the recognition program of calibration results from CLAS laboratories.
Note: When this item is selected, a copy of this application must be submitted by the applicant to Measurement Canada, Approval and Calibration Services Laboratory (ACSL).
Authorized representative of applicant laboratory Name: Title: Date: Telephone: Email: Signature: Laboratory contact person (if different than above) Name: Title: Telephone: Email:
Appendix C: Application form – group accreditation
Appendix C: Application form - group accreditation (PDF, 181 KB)
The following content is not a fillable form. It is copied from the Appendix C PDF form and is included below as reference only.
Text content of the Appendix C PDF form as reference only
To obtain accreditation and a CLAS Certificate, organizations have two accreditation bodies to choose from. Please make your selection below.
- Canadian Association for Laboratory Accreditation (CALA)
- Standards Council of Canada (SCC)
For details, please refer to CLAS Requirements Document 10.
Laboratory legal name: Headquarters Postal/street address: City and province or state: Postal/zip code and country: Hereby applies for accreditation and CLAS Certificate as a calibration laboratory for the scope of measurement capabilities outlined in the attached Requested scope of accreditation and CLAS Certificate.
Contact person - technical operations Name: Title: Telephone: Email: Contact person – management system Name: Title: Telephone: Email: Contact person - billing Name: Title: Telephone: Email: Authorized representative of group – top management Name: Title: Telephone: Email: Signature: This document must be accompanied by the completed Requested scope of accreditation and CLAS Certificate (Appendix D) and the laboratory management system documentation.
Locations Identification Postal / street address City and province or state Postal / zip code and country Contact / Title Telephone Email
Appendix D: Requested scope of accreditation and CLAS Certificate
Appendix D: Requested scope of accreditation and CLAS Certificate (PDF, 141 KB)
The following content is not a fillable form. It is copied from the Appendix D PDF form and is included below as reference only.
Text content of the Appendix D PDF form as reference only
Enter the requested Calibration Measurement Capabilities (CMCs). For more information on CMCs see International Laboratory Accreditation Cooperation (ILAC) document P14, ILAC Policy for Uncertainty in Calibration, available at ILAC.
Laboratory identification: Type of standard / equipment calibrated Quantity Measured / values / range of values Expanded Measurement Uncertainty Location of Service (laboratory, customer-site or mobile) Method and/or Measurement Technique Standard(s) and/or Equipment Providing Traceability
Appendix E: SAMPLE Requested Scope of Accreditation and CLAS Certificate
| Type of standard / equipment calibrated | Quantity Measured / values / range of values | Expanded Measurement Uncertainty | Location of Service (laboratory, customer-site or mobile) | Method and/or Measurement Technique | Standard(s) and/or Equipment Providing Traceability |
|---|---|---|---|---|---|
| Spectrophotometers | 0.1% to 100% spectral transmittance at decade wavelengths from 200 nm to 1100 nm | ± 4% of reading | Customer-site | United States Pharmacopoeia (USP) Chapter <857> ultraviolet-visible spectroscopy | AAA spectral transmittance filter kit calibrated every 3 years by NIST and compared in-house against check standards at least monthly. |
| Luminance meters | 0.01 cd/m2 to 299,000 cd/m2 | ± 5% of reading for CIE Source A | Laboratory | CIE Source A 200 W luminous intensity standard and Ba2SO4 reflectance standard on custom optical bench. Lamp current is measured using a AAA digital voltmeter across a BBB current shunt | CIE source and reflectance standard calibrated by NRC, either directly or through suitable transfer standards. Digital voltmeter and current shunt are calibrated every 2 years by LLL (CLAS cert. No. nnn). |
| Voltage, DC sources | 10 V | 2.0 ppm for calibration of solid state reference standards | Laboratory | Calibration of voltage sources using a zener reference standard and Binary Voltage Divider (BVD) | Bank of CCC voltage standards, one of which is calibrated annually by AAA (CLAS cert. No. nnn). The 4 voltage standards are inter-compared at least monthly using a DDD digital multimeter calibrated annually by AAA (NVLAP Lab Code BBB) |
| AC Current measuring devices |
| 0.09% to 0.12% | Laboratory | Source. For the calibration of current measuring devices by comparison to current sourced from a multifunction calibrator using manufacturer calibration procedure. | AAA multifunction calibrator monitored with a BBB digital multimeter that is calibrated annually by XXX (A2LA accreditation no. nn). |
| AC Current sources |
| 0.04% to 0.08% | Laboratory | Measure. For the calibration of current sources by comparison to a digital multimeter using manufacturer calibration procedure. | AAA digital multimeter that is calibrated annually by XXX (NVLAP Lab Code nnn) and BBB current shunts calibrated annually by NIST. |
| Time interval | 5 s to 24 h | ± 0.2 s | Customer-site and laboratory | NIST special publication 960‑12 Stopwatch and timer calibrations. | XXX manually-operated digital timer calibrated remotely by measurement of time signal distributed by NRC by telephone. |
| Rotational speed, centrifuges | 1 rpm to 75,000 rpm | ± 1 rpm | Customer-site | Calibrated by comparison to an optical tachometer. | AAA optical tachometer calibrated annually by NRC. |
| Liquid in glass thermometer | -20 °C to +70 °C | ± 0.5 °C | Laboratory | ASTM E1‑14. Standard Specification for ASTM Liquid-in-Glass Thermometers | Stirred, characterised, water and oil baths and XXX digital thermometer calibrated annually by YYY (CLAS cert. No. nnn). thermometer |
| Temperature indicators for Type K thermocouples | 0 °C to 1000 °C | ± 0.3 °C to 1.1 °C | Customer-site and mobile | By electrical simulation using a multi-function calibrator. | AAA multifunction calibrator calibrated annually by BBB (JAB accreditation no. nnn). |
Appendix F: Measurement capability categories
| Major fields of calibration | Categories of calibration capabilities |
|---|---|
| 1 Acoustic and vibration | 1-1 Microphones |
| 1-2 Sound level meters | |
| 1-3 Sound calibrators | |
| 1-4 Accelerometers | |
| 1-5 Others | |
| 2 Chemical | 2-1 Reference materials |
| 2-2 Instrumentation | |
| 2-3 Others | |
| 3 Dimensional | 3-1 1D dimensional measuring equipment |
| 3-2 2D dimensional measuring equipment | |
| 3-3 3D dimensional measuring equipment | |
| 3-4 Gauge blocks | |
| 3-5 Dimensional standards and gauges (other than gauge blocks) | |
| 3-6 Thread gauges | |
| 3-7 Thread measuring equipment | |
| 3-8 Speed measuring equipment | |
| 3-9 Others | |
| 4 ElectricalTable note* | 4-1 Voltage |
| 4-2 Resistance | |
| 4-3 Current | |
| 4-4 Electrical power | |
| 4-5 Inductance | |
| 4-6 Capacitance | |
| 4-7 Magnetic properties | |
| 4-8 RF | |
| 4-9 Phase | |
| 4-10 Others | |
| 5 Force | 5-1 Standard (eg. load cell) |
| 5-2 Force measuring equipment | |
| 5-3 Torque standards | |
| 5-4 Torque measuring equipment | |
| 5-5 Others | |
| 6 Flow | 6-1 Fluid |
| 6-2 Gas | |
| 6-3 Viscosity | |
| 6-4 Others | |
| 7 Hardness | 7-1 Standards (hardness blocks) |
| 7-2 Hardness testers indirect verification | |
| 7-3 Hardness testers full verification | |
| 7-4 Others | |
| 8 Humidity | 8-1 Humidity generator |
| 8-2 Humidity measuring equipment | |
| 8-3 Others | |
| 9 Mass | 9-1 Mass standards (nominal weights) |
| 9-2 Mass standards (non-nominal weights) | |
| 9-3 Balances and scales | |
| 9-4 Density | |
| 9-5 Gravity | |
| 9-6 Others | |
| 10 Photometry and radiometry | 10-1 Photometry |
| 10-2 Spectrophotometry | |
| 10-3 Colorimetry | |
| 10-4 Radiometry | |
| 10-5 Others | |
| 11 Pressure | 11-1 Deadweight tester (hydraulic and pneumatic) |
| 11-2 Pressure measuring equipment | |
| 11-3 Vacuum measuring equipment | |
| 11-4 Others | |
| 12 Radiological (including ionizing radiation) | 12-1 Dosimetry |
| 12-2 Neutron measurement | |
| 12-3 Radioactivity | |
| 12-4 Others | |
| 13 Thermometry | 13-1 Fixed point cells |
| 13-2 SPRTs | |
| 13-3 Temperature measuring equipment (other than SPRT) | |
| 13-4 Thermal radiation measuring equipment | |
| 13-5 Temperature controlled enclosures | |
| 13-6 Others | |
| 14 Time and frequency | 14-1 Frequency / Period |
| 14-2 Time dissemination | |
| 14-3 Rise time and pulse characteristics | |
| 14-4 Time interval | |
| 14-5 Rotational speed | |
| 14-6 Others | |
| 15 Volume | 15-1 Volume delivering equipment (e.g., Pipette) |
| 15-2 Volume containing equipment | |
| 15-3 Others |