Calibrations are performed in Mesa’s world class gas flow laboratory. Our ISO 17025 ANSI Z-540 Handbook 150 Accreditation and documented NIST-traceability ensure our accuracy claims are met. An annual NIST-traceable calibration by Mesa’s ISO accredited facility provides a defensible audit trail as well as the periodic care and maintenance your DryCal instrument requires as a precision measuring tool. Mesa’s full product refurbishment includes:
- Disassembly and Inspection for wear, defect, contaminants and damage, and then cleaning, repairing or replacing as necessary. As needed, we thoroughly clean the cell and piston test and adjust the valve mechanism, replace the inlet filter and recertify the crystal timing device.
- Battery Test and Replacement – We use a custom load resistor to fully discharge your battery in order to determine if it meets our energy storage requirements. Then, we either reinstall and charge your battery, or replace it.
- Upgrade Firmware and Hardware that has improved since you last purchased or serviced your instrument.
- Temperature and Pressure Sensor Calibration, if necessary.
- 3-Point Flow Calibration with Adjustment.
- NIST-traceable Certificate with Pre and Post Data – As-Found (pre) and As-Left (post) data is printed on certificates as well as stored in our calibration database for future reference. As-Found data will inform the user if the Definer was out of specification when it arrived at Mesa as previous calibrations performed with the unit could be called into question.
- 90 Day Warranty.
Mesa Labs is the only laboratory in the U.S. that can perform a DryCal calibration. It should be noted that third party calibration laboratories cannot adjust your DryCal instrument. This means they cannot reset calibration points, perform repairs and maintenance with authorized parts, provide hardware/firmware updates or check and change batteries. They may be able to issue a NIST-traceable certificate that identifies the instruments falls within claimed accuracy specifications; however, we recommend caution when working with NIST-traceability claims.
Unless the claims are backed up with a complete documentation chain that has been audited by a third party, such as an ISO-accredited authority, the NIST-traceability is not a guarantee. Traceability by itself does not offer any assurances of the quality of calibration, accuracy of the lab or usefulness as a measurement of precision. ISO accreditation means the lab has been audited and has proven its testing procedures, traceability and accuracy claims. You should look for a lab that has received ISO 17025 accreditation, the standard which applies to testing and calibration laboratories.
We suggest requesting the paper trail from the laboratory in order to determine whether the traceability claims are reliable. Labs that can readily produce their ISO certificate have been audited and proven. A summary of the ISO/IEC 17025:2005 standard can be found on the ISO website. Mesa’s ISO 17025 documentation can be found on http://www.mesalabs.com/certifications.
For more information on Mesa’s factory calibration, or to request service, please contact us at drycal.mesalabs.com.