TESCO ISO 17025 Testing and Calibration Laboratory

At TESCO, we are dedicated to offering quality, accurate, accredited calibrations through our legendary customer service, that is flexible, consistent, and unparalleled.  TESCO has the widest scope of accreditation in the industry that allows us to perform a variety of calibrations for your needs from simple hand held instruments to complex field and shop equipment of any manufacturer.  Ask about our calibration plans today!

The TESCO Calibration & Testing Laboratory is:
ISO/IEC 17025:2017 Accredited
• ANSI/NCSL Z540-1-1994 Accredited (MIL-STD-45662A plus software control)
• Traceable reference standards maintained through national laboratories (e.g. NRC, NIST) in a diverse extended scope of accreditation


In-Lab Calibration

  • We calibrate, upgrade or repair all TESCO or Knopp equipment or standards
  • We can handle a wide spectrum of ANSI and UL testing
  • Knopp transformers are the industry standard and we maintain a primary reference transformer standards at an economical price below nationals institutes
  • Our Next Gen meter test equipment is fast becoming the choice of the industry
  • This service offers you the best value

On-Site Calibration

  • This premium service offers you the flexibility of the same quality calibration, repair and upgrades you expect from our in-lab services
  • Fully traceable and accurate
  • We bring our lab to you for a cost competitive solution that matches your needs

Remote “Loaner” Calibration

  • This accommodating solution offers increased flexibility  where we send you at loaner reference standard fully traceable and all the hardware and/ or software required to perform your own calibration
  • Includes clear easy to read and use work instructions
  • This is a very cost effective alternate solution to our On-Site services
  • We bring our lab to you for a cost competitive solution that matches your needs

Non-TESCO Energy Standards

Yes, we can re-certify most non-TESCO Energy Standards or field test equipment

Other Test Instruments

TESCO can test and certify other industry test equipment such as:


  • Ammeters
  • Clamp On Meters
  • Digital Hand Held Multimeter
  • Hi-Pots
  • Mega-ohmmeters
  • Watt-meters
  • Decade Boxes

High Voltage

  • AC up to 36,000 V AC
  • DC measure up to 40 K V

High Current

  • AC up to 8,000 amps

ISO 17025:2017 Accreditation

This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025. This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (refer to joint ISOILAC-IAF Communiqué dated April 2017).

Equipment Documentation

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Inquire about TESCO services

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