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AC Ratio Transformer Calibrators


Precisely Calibrate AC Ratio Transformers

Our 1372 series AC ratio transformer calibrators are designed to modernize the equipment and processes used for the calibration of AC ratio transformers. These systems are engineered for accuracy to ensure reliable performance of AC ratio transformers. Featuring a user-friendly computer interface, they offer of refreshing approach to ratio transformer calibration. The 1372A includes the DT72B AC Ratio Transformer as the reference standard wherethe 1372B is provided without the necessary DT72B, so users can install their own reference standard.



  • Resolution 0.1 ppm
  • Terminal linearity 0.9 ppm
  • Bandwidth 50 Hz to 20 kHz
  • Ratio testing is performed at defined points between 0.0000000 and +1.0000000
  • 1 year warranty
  • Assembled in USA


  • Modernized calibration of AC ratio transformers.


Basic Accuracy/Linearity: 0.00009%
Frequency Range: 50 Hz to 20 kHz
Ratio Range: 0.0 to +1.0
Resolution (°C): 1 x 10⁻⁷

Stock Check

Model Number
Frequency Range Ratio Range Resolution Buy
1372A Active, Contact Us
AC Ratio Transformer Calibrator, Automated, Turnkey
50 Hz to 20 kHz 0.0 to +1.0 1 x 10⁻⁷ Buy
1372B Active, Contact Us
AC Ratio Transformer Calibrator, Automated, (1372A w/o DT-72)
50 Hz to 20 kHz 0.0 to +1.0 1 x 10⁻⁷ Buy


Calibration and Alignment

Advanced Energy has the tools and processes to ensure your equipment continues to meet its original specifications.  Our products are calibrated at global AE service sites with proprietary technology designed to exceed industry standards​.

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Our worldwide service centers provide fast cycle times, use only AE-qualified parts, and follow the original product's specifications and test procedures for the highest quality repair or calibration.

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24/5 Support Available

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We are committed to providing excellent customer service and technical support to our customers. With live chat and phone support, you can reach out to a qualified engineer for help at any time.
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