NIST-Traceable Calibration Services for Electrical, Mechanical, Electromechanical, and Electronic Measuring Instruments in Chattanooga, TN

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 Chattanooga 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 Chattanooga customers:

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


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ETI is the Top Provider of NIST-Traceable Calibration Services for Electrical Test Equipment in and around Chattanooga, Tennessee

Testing companies depend on ETI to manage the yearly calibration programs for their electrical test equipment. Our NIST-traceable calibrations cover megohmmeters, power analyzers, power supplies, power factor test sets, multimeters, electrical clamps, recloser test sets, DLRO’s, circuit breaker testers, oscilloscopes, and a variety of other instruments. Our team can calibrate your instruments at your facility. Customers in Chattanooga, TN have ETI come onsite for the same-day turnaround of their test equipment with very little time out of commission. We also offer an expedite service for Chattanooga customers who require immediate recovery of their instruments. 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 sizes and shapes in Chattanooga, TN rely on ETI as a crucial calibration partner.

ETI is a Top Provider of NIST-Traceable Calibration Services for Mechanical Instruments in Chattanooga, Tennessee

Electrical Test Instrument’s NIST-traceable calibrations of mechanical measuring and test equipment are trusted by testing businesses across the country. The mechanical instruments we service include micrometers, oil pressure meters, infrared inspection equipment, IR cameras, pressure controllers, air pressure meters, calipers, tachometers, stopwatches, torque wrenches, temperature meters, and virtually anything in between. Our experts are skilled in the onsite calibration of mechanical equipment at our customers’ locations in Chattanooga, Tennessee. Our team also offers a mail-in choice to service your critical mechanical test equipment here at our calibration laboratory. Calibration services in Chattanooga is a cost-effective and convenient option for local customers who wish to minimize their downtime. Our mail-in option also provides prompt turnaround times of five to eight business days, ensuring our customers in Chattanooga have their critical equipment serviced promptly. ETI is an ISO 9001:2015-accredited calibration laboratory that is ANSI/NCSL Z540 and 10 CFR Part 50 Appendix B compliant. Data centers, municipalities, universities, utilities, Fortune 500 companies, acceptance testing businesses, nuclear energy facilities, and electrical contractors of various sizes in Chattanooga, Tennessee count on ETI to oversee their mechanical test and measuring instrument calibration programs.

Test Equipment Repair Services for Chattanooga Companies

ETI services all major brand names and models of electrical testing instruments. Regardless of whether your Chattanooga facility’s instruments have been in service for decades or are recent to your company, our broad repair capabilities are able to prolong the life of your most important testing equipment. ETI’s repair services include lab instruments, panel meters, multimeters, power quality meters, switchboard meters, analog instruments, clamp-on meters, oscilloscopes, power analyzers, frequency counters, digital instruments, and a variety of additional mechanical and electrical test equipment. All of our repair services feature NIST-traceable calibration of your equipment, comprehensive documentation, competitive pricing, and a fast turnaround. Chattanooga, TN facilities rely on ETI to decrease their downtime and mend their critical test instruments.

Manufacturing Top Quality Circuit Breaker Testers and Power Supplies for Companies All Over the USA

ETI produces and retails trusted electrical test equipment. Our Professionals provide services for circuit breaker testing instruments, such as circuit breaker test sets and power supplies. In addition, we are the U.S. service center and reseller for the complete line of Metrel electrical test instruments and products.

Our line of top quality low voltage high current circuit breaker test sets serve the whole spectrum of electrical testing companies’ necessities. Our primary injection circuit breaker testers range from 250A to 6,000 A continuous output, with instantaneous testing capabilities up to 60,000 A. Our PI-250B, PI-800, and PI-1600 test sets are portable, lightweight, durable, and modular whilst outperforming competing products’ capabilities at their price points. Our stationary PI-2500, PI-4000B, PI-5000, and PI-6000 circuit breaker test sets also lead the industry in capabilities and reliability for high current circuit breaker testing. All ETI circuit breaker testers incorporate our state-of-the-art MAC-21 controller, which is a self-contained microprocessor-based metering and control package for primary injection testing. We also 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 highly valued clients.

ETI’s premium power supplies are light in weight, durable, and reliable. Our product lines are capable of outputting 7.2 A to 20A continuous at 140 VAC. ETI’s power supplies are perfect for circuit breaker charging motor testing.

As the U.S. authorized service center and reseller for Metrel products, ETI is truly a one-stop answer for electrical testing companies’ instrument needs. We sell and support the full line of Metrel products, which include megohmmeters, DLRO’s, and power analyzers. Our yearly calibration programs and repair services on every product we produce and sell make ETI the trusted partner of hundreds of electrical testing companies, data centers, universities, Fortune 500 companies, utilities, and municipalities across the country.

Calibration and Repair Services in Chattanooga


About Chattanooga, TN

A Hamilton county city Chattanooga has a population of 182,799. The city is a transit hub. Healthcare, tourism, food and beverage production, automotive and other industries have headquartered here. These sectors are the major economic contributors of Chattanooga. It is rightly named the Scenic City. Other nicknames include Nooga, Chatt, River City, Chattown And Gig City. The city is famous internationally for the song Chattanooga Choo Choo. Chickamauga Creek is the oldest remaining visible art here. The city derived its name from Muskogen word Chato for rock and a local suffix nuga. It means a dwelling place. Previously what was referred to as the Ross’s Landing became Chattanooga. It was referred to as the city where cotton meets corn. It was the center of battle during the civil war. It has the honor of hosting one of the three defining moments during the Civil War which went in the union’s favor.

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ETI Precision – Electrical Test Instruments supports customers in Chattanooga, Tennessee, including the following zip codes: 37341, 37343, 37350, 37351, 37363, 37401, 37402, 37403, 37404, 37405, 37406, 37407, 37408, 37409, 37410, 37411, 37412, 37414, 37415, 37416, 37419, 37421, 37422, 37424, 37450. Click here to return to our TN service area page.