NIST-Traceable Calibration Services for Electrical, Mechanical, Electromechanical, and Electronic Measuring Instruments in Greenville, 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 Greenville 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 Greenville customers:

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


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ETI is the Premier Supplier of NIST-Traceable Calibration Services for Electrical Test Equipment in Greenville, SC

Testing companies rely on ETI to run the yearly calibration programs of their electrical test equipment. Our NIST-traceable calibrations cover recloser test sets, power factor test sets, power supplies, power analyzers, multimeters, oscilloscopes, megohmmeters, DLRO’s, circuit breaker testers, electrical clamps, and a wide range of other instruments. We can calibrate your instruments at your facility. Customers in Greenville, SC select to have ETI come onsite for one-day turnaround of their test equipment with minimal time out of commission. ETI is an ISO 9001:2015-accredited calibration laboratory that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Universities, electrical contractors, Fortune 500 companies, utilities, data centers, nuclear energy facilities, electrical testing businesses, and municipalities of many sizes and shapes in Greenville, SC count on ETI as an essential calibration partner.

ETI is a Top Supplier of NIST-Traceable Calibration Services for Mechanical Instruments in Greenville, SC

ETI offers NIST-traceable calibration services for a wide range of test equipment and mechanical measuring, including calipers, IR cameras, oil pressure meters, infrared inspection equipment, stopwatches, air pressure meters, pressure controllers, micrometers, tachometers, temperature meters, torque wrenches, plus everything in between. We provide services in our customers’ facilities in Greenville, South Carolina. Our onsite calibration customers in Greenville experience same-day turnaround of their equipment over at their own facilities with very little downtime. 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, universities, Fortune 500 companies, acceptance testing businesses, electrical contractors, utilities, data centers, and municipalities of all shapes and sizes in Greenville, South Carolina turn to ETI to manage their measuring instrument and mechanical test calibration programs.

Repairing Electrical and Mechanical Test Equipment for Greenville Facilities

ETI services all of the major brand names and models of electrical testing instruments. Whether your Greenville facility’s instruments have been in operation for many years or are brand new, our vast repair capabilities can prolong the life of your most important testing equipment. ETI’s customer services include clamp-on meters, analog instruments, panel meters, digital instruments, multimeters, power analyzers, oscilloscopes, lab instruments, frequency counters, switchboard meters, power quality meters, and a variety of additional electrical and mechanical test equipment. Every one of our repair services include NIST-traceable calibration of your equipment, comprehensive documentation, competitive pricing, and a speedy turnaround. Greenville facilities count on ETI to decrease their down time and mend their critical test instruments.

Electrical Test Intrument’s Circuit Breaker Testing Equipment is Used by Testing Companies and Industrial Facilities Across The Country

ETI manufactures and retails industry-leading electrical test equipment. We specialize in circuit breaker testing instruments, which include circuit breaker test sets and power supplies. We are also the U.S. service center and reseller for the entire line of Metrel electrical test instruments and products.

Our product line of top quality low voltage high current circuit breaker test sets cater to the full spectrum of electrical testing companies’ requirements. 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, lightweight, durable, and modular 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 capabilities and reliability for high current circuit breaker testing. All Electrical Test Instrument circuit breaker testers feature our cutting edge 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:

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

ETI’s premium 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 excellent for circuit breaker charging motor testing.

As the U.S. reseller and authorized service center for Metrel products, ETI is genuinely a one-stop shop for electrical testing companies’ instrument requirements. We sell and support the full line of Metrel offerings, including meghommeters, DLRO’s, and power analyzers. Our yearly calibration programs and repair services on every product 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 Greenville


About Greenville, SC

A Greenville county city Greenville has a population of 70,635. The city was known as Pleasantburg initially. It is one of the fastest-growing cities of the USA. Initially, it was the hunting ground of the Cherokee. The city and the county derive their names in honor of General Nathanael Greene who played a great role in the American revolutionary war. It developed as a summer resort and attracted people from other cities during this season and it aided its growth. The city developed as a cotton mill center and was known as the Textile Center of the South. It was the training campsite for the army recruits during the WWI. The Greenville army air base was developed here during WWII. It is the largest city in the upstate. It is home to event venues like Bon Secours wellness arena, coffee underground theatre, peace center and many more.

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ETI Precision – Electrical Test Instruments supports customers in Greenville, South Carolina, including the following zip codes: 29601, 29602, 29603, 29604, 29605, 29606, 29607, 29609, 29611, 29612, 29614, 29615, 29616. Click here to return to our SC service area page.