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Durometer Calibration & Certification to ISO/IEC 17025 ANSI/NCSL Z540-1


Durometer Calibration for the Oil, Gas and Coatings Industry
PTC® Instruments recommends all durometers be calibrated by an accredited lab to ISO 17025

All Calibration Standards are traceable to the National Institute of Standards and Technology (NIST). Durometer calibration services and reports are provided by PTC Metrology™ and will meet your ISO, ANSI, MIL, DoD, EuroNorm and other international standards including DIN 53505, ISO 868 and ISO 7619.

A written calibration report for any durometer covered by current ASTM D2440 or ASTM F1957 specifications is available from PTC Metrology™ Certification provides "as received" and "as left" data. Calibration points for force curve and gage linearity are every 10 points over the scale (0-100) of the durometer.

PTC® durometers type A, B, C, D, DO, E, M, O, OO, OOO and OOO-S are calibrated in accordance with ASTM D2240 section 7 which includes the following measurements:
  1. Indenter Geometry
  2. Indenter Extension
  3. Gage Linearity
  4. Force Curve Measurement
A2LA has MRAs (mutual recognition agreements) with NVLAP, NIST, EA, ILAC, IAAC and NACLA (see http://www.a2la.org/recognition/cooplabs.cfm ) for details.


Please fill out the form below if you have a durometer for calibration or repair.

Return Materials Authorization Form


A2LA Accredited ISO17025

Accreditation is the unbiased assessment by a third party of the laboratory's quality program and technical capabilities. The third party assesses the laboratory against a recognized standard. In December 1999, the new standard, ISO/IEC 17025, "General Requirements for the Competence of Testing and Calibration Laboratory's was adopted and has now replaced ISO Guide 25 as the accepted standard for accredited test and measurement laboratories.

Accreditation indicates that a laboratory has demonstrated that it functions within the parameters of the standard. While accreditation is not a guarantee of a laboratory's performance, it does provide a means for determining the laboratory's competence to perform particular types of tests or calibrations. The technical evaluation during an accreditation includes a review (by experts in the relevant discipline) of calibration procedures, calibration standards, traceability, uncertainty analysis, actual results, and statistical process control.

Laboratory accreditation has been a requirement in many countries for years. Nationally recognized accreditation bodies have provided customers with confidence in calibration certificates and reports by employing generally established standards set by the European (CEN) or international (ISO) standardization bodies. Accreditation in the United States is voluntary. Nevertheless, as more companies become ISO 9000 certified, accreditation is becoming a more common practice in the United States.
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