NIST-Traceable Calibration Services for Electrical, Mechanical, Electromechanical, and Electronic Measuring Instruments in Spartanburg, SC

Electrical Test Instruments, LLC DBA ETI Precision (ETI) is a leader in the calibration and repair of test and measurement equipment, specializing in high-current and high-voltage instruments.

We provide onsite services in the Spartanburg region, minimizing the downtime of your critical instruments by offering calibration services at your facility. Our NIST-traceable calibration services encompass a wide variety of electrical, mechanical, radio frequency (RF), pressure, physical-dimensional, and environmental instrumentation. For more information

We are an ISO 9001:2015-certified, ISO/IEC 17025:2017-accredited, and ANSI/NCSL Z540-1-1994-accredited calibration laboratory. We offer MIL-STD-45562A-compliant calibrations and calibrations in accordance with 10 CFR Part 21 and 10 CR Part 50 Appendix B upon request.

Contact us today
Phone: 410-857-1880

Just some of the products and services we offer our Spartanburg customers:

  • Calibration of Test & Measurement Equipment
  • Frequency Counter Calibration
  • DLRO Calibration
  • Oscilloscope Calibration
  • Sound Level Meter Calibration
  • Stopwatches & Timers
  • Temperature Probe Calibration
  • Thermocouple Calibrator Calibration
  • Torque Wrench Calibration
  • Digital Multimeter Calibration
  • IR Thermometer Calibration
  • Process Calibrator Calibration
  • Ammeter & Shunt Calibration
  • Calibration of High Current – High Voltage Equipment:
  • Single & Three Phase TTR Calibration
  • Primary Injection Test Set Calibration
  • Relay Test Set Calibration
  • AC and DC voltages above 100kV
  • Power Supply Calibration
  • Secondary Test Set Calibration
  • High Voltage Detector Calibration
  • Megohmmeter Calibration
  • Current & Potential Transformers
  • Power Quality Analyzer Calibration
  • Earth Ground Tester Calibration
  • Hipot Tester Calibration


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ETI is a Premier Vendor of NIST-Traceable Calibration Services for Electrical Test Equipment in Spartanburg, South Carolina

Testing companies rely upon ETI to run the yearly calibration programs for their electrical test equipment. Our NIST-traceable calibrations cover recloser test sets, power factor test sets, power supplies, power analyzers, multimeters, oscilloscopes, meghommeters, DLRO’s, circuit breaker testers, electrical clamps, and a wide range of other instruments. Our company can calibrate your instruments onsite at your facility or off-site at ETI’s calibration laboratory. Companies in Spartanburg, SC select to have ETI work onsite for same-day turnaround of their equipment with very little downtime. When you send your instruments in for service at our laboratory, we endeavor to deliver your equipment in a matter of 5 – 8 business days. In addition, we offer a fast track service for Spartanburg clients who need to have quick recovery of their equipment. ETI is an ISO 9001:2015-accredited calibration laboratory that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Universities, nuclear energy facilities, Fortune 500 companies, data centers, electrical testing businesses, municipalities, electrical contractors, and utilities of many shapes and sizes in Spartanburg, South Carolina utilize ETI as a crucial calibration partner.

NIST-Traceable Mechanical Instrument Calibration Services Available in the Spartanburg Area

ETI’s NIST-traceable calibrations of mechanical measuring and test equipment are used by testing businesses throughout the U.S. The instruments we support include micrometers, oil pressure meters, infrared inspection equipment, IR cameras, pressure controllers, air pressure meters, calipers, tachometers, stop watches, torque wrenches, temperature meters, and virtually anything in between. We specialize in the onsite calibration of mechanical equipment at our clients’ facilities in Spartanburg, South Carolina. ETI also offers a mail-in option to service your critical mechanical test equipment here at our calibration lab. Calibration services in Spartanburg is an economical and convenient option for nearby customers who wish to curtail their downtime. Our mail-in alternative provides prompt turnaround times of 5 to 8 business days, ensuring our customers in Spartanburg have their critical equipment serviced quickly. ETI is an ISO 9001:2015-accredited calibration laboratory that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Nuclear energy facilities, electrical contractors, acceptance testing businesses, universities, data centers, Fortune 500 companies, municipalities, and utilities of various shapes and sizes in Spartanburg, SC depend on ETI to manage their mechanical test and measuring instrument calibration programs.

We Repair Electrical and Mechanical Test Equipment for Spartanburg Businesses

ETI repairs all of the major brands and models of electrical testing instruments. Regardless of whether your Spartanburg facility’s instruments have been in operation for many years or are brand new, our vast repair capabilities can lengthen the life of your critical testing equipment. ETI’s maintenance and repair support services include clamp-on meters, power quality meters, oscilloscopes, lab instruments, power analyzers, digital instruments, frequency counters, switchboard meters, analog instruments, multimeters, panel meters, and a wide range of other electrical and mechanical test equipment. All of our repair services include NIST-traceable calibration of your equipment, detailed documentation, competitive rates, and a speedy turnaround. Spartanburg facilities turn to ETI to lessen their down time and repair their critical test instruments.

Building Industry-Leading Circuit Breaker Testing Equipment for the Electrical Testing Industry Across The Country

ETI produces and retails trusted electrical test equipment. Our experts specialize in circuit breaker testing instruments, including circuit breaker test sets and power supplies. We are also the United States reseller and service center for the entire line of Metrel electrical test instruments and products.

Our line of top quality low voltage high current circuit breaker test sets provide for the whole spectrum of electrical testing companies’ necessities. Our primary injection circuit breaker testers range from 250A to 6,000 A continuous output, with immediate testing capabilities up to 60,000 A. Our PI-250B, PI-800, and PI-1600 test sets are portable, modular, durable, and lightweight while at the same time outperforming competing products’ capabilities at their price points. Our stationary PI-2500, PI-4000B, PI-5000, and PI-6000 circuit breaker test sets also best the market in reliability and capabilities for high current circuit breaker testing. All Electrical Test Instrument circuit breaker testers include our state-of-the-art MAC-21 controller, which is a self-contained microprocessor-based metering and control package for primary injection testing. In addition, we retrofit other manufacturers’ circuit breaker test sets with our MAC-21 controller:

  • revamping the circuit breaker testing capabilities,
  • expanding their capabilities,
  • and extending their useful lives of our highly valued customers.

ETI’s high quality power supplies are light in weight, sturdy, and reliable. Our instruments are capable of outputting 7.2 A to 20A continuous at 140 VAC. ETI’s power supplies are ideal for circuit breaker charging motor testing.

As the United States reseller and authorized service center for Metrel , ETI is undeniably a one-stop shop for electrical testing companies’ instrument requirements. We sell and support the full line of Metrel offerings, such as DLRO’s, meghommeters, and power analyzers. Our yearly repair services and calibration programs on all products we manufacture and sell make ETI the trusted partner of hundreds of electrical testing companies, universities, data centers, Fortune 500 companies, utilities, and municipalities across the country.

Calibration and Repair Services in Spartanburg


About Spartanburg, SC

A Spartanburg County city Spartanburg has a population of 37,013. The city is named after Spartan Regiment, a local militia. The city played an active role in the American Revolutionary War. It was nicknamed Hub City. A major textile manufacturing center then, now the city is home to several huge companies like Denny’s, Smith Drug Company, RJ Rockers Brewing Company and many more. A BMW manufacturing unit is located in the county also contributes to the economy of the city. Milliken & Company, a textile and chemical manufacturer has the global headquarters of its research facility in the city. Advance America, Walmart, American Credit Acceptance, and more are the other economy providers of Spartanburg. Walnut Grove Plantation, Lawsons Fork Creek, The Morgan Square, Cottonwood Trail, and so on are the points of interest here. Blues musician, Pink Anderson, activist Emma L Bowen and more are the notable people from here.

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ETI Precision – Electrical Test Instruments supports customers in Spartanburg, South Carolina, including the following zip codes: 29301, 29302, 29303, 29304, 29305, 29306, 29307, 29319. Click here to return to our SC service area page.