AEMC DTR8511 (2136.55) Digital Transformer Ratiometer

The DTR® 8511 was built for fast, accurate, and hassle-free testing of transformers (power, VT/PTs, and CTs). With its brighter display, ergonomic design, and built-in safety checks, you’ll have confidence in every result. While maintaining the fully automatic VT/PT and CT testing functions that technicians trust for accurate ratio and excitation current measurements, the DTR® 8511 delivers a lighter, more ergonomic design with advanced safety features built in. A brighter, larger display improves visibility in any environment, while an oversized test button allows for easy operation, even with gloves on.

This ratiometer makes transformer ratio testing fast, accurate, and hassle-free. Designed for the field, it’s fully automatic. No calibration, range selection, hand cranking or tedious balancing required—no wasted time! Built-in checks catch lead reversals and opens, giving you confidence in every measurement. Results display quickly, including turns ratio, excitation current, and nameplate deviation, so you know exactly what you’re working with.

You can also save nameplate voltages and compare results in real time as data is gathered. Test data can then be downloaded to a PC and analyzed with the included DataView® software, which also provides full instrument control. When connected via the isolated USB interface, results can be managed and reviewed through the DTR® Control Panel for streamlined reporting and analysis.

Features
Wide ratio range: Accurately measures transformer ratios up to 8000:1 for VT/PT mode and 1000:1 for CT mode
Higher excitation current capability up to 2 A and optimized 64 Hz test frequency for more accurate field simulations
Advanced low-voltage step-down measurement: Applies test current to the primary side windings, enhancing operator safety and enabling testing across a wider range of transformer types and sizes
Automatic test cycles: Quickly checks for lead reversal and open circuits with no manual balancing required
Built-in continuity testing: Detects open transformer windings quickly
Deviation calculations: Compare measured values to stored nameplate data for instant pass/fail results
Large storage capacity: Save up to 9801 test results for easy recall and reporting
Seamless data management and connectivity: Connect directly to your PC via the isolated USB interface to manage results, configure nameplate values, and generate professional reports with the included DataView® software and DTR® Control Panel
Rugged and portable: Lightweight, field-ready design with an IP53-rated protective case (with lid closed)
Flexible power options: Operates on NiMH batteries or 12 V DC external supply and the batteries can be recharged through USB-C connector or 12 V DC external supply
User-friendly interface: Bright backlit 4-line display, intuitive navigation keys, and audible test alerts
Fully automatic: No calibration, range selection, hand cranking, or tedious balancing required
Displays turns ratio, excitation current, winding polarity, and % deviation from the nameplate values
Confidence in every result: Built-in safety checks catch wiring errors and connection issues, while deviation calculations compare against stored nameplate data for clear pass/fail confirmation
Flexible Reporting: Generate professional reports instantly with built-in templates or customize your own
USB type C connection
Measurement output (H) 5-pin connector
LCD display
Measurement input (X) 3-pin connector
Navigation buttons
12 V DC input connector
Power button
DataView® Software

Our DataView® software makes it easier to troubleshoot, optimize performance, and document results. By connecting your DTR® 8511 directly to your computer, DataView® saves time, improves accuracy, and streamlines your workflow. With DataView®, you can:

Connect easily: Link your instrument to a computer via USB
See data live: Display and analyze real‑time measurements in a clear, frame‑style interface
Retrieve past results: Download and review previously recorded data
Fine‑tune settings: Configure a wide variety of instrument parameters
Maintain your device: Erase stored content and perform instrument upkeep
Generate reports effortlessly: Use standard templates or customize your own for professional reporting
DTR® Control Panel

All DTR® models will interact with a PC through the DTR® Control Panel. This Control Panel is designed to support the new DTR® 8511 and the older DTR® 8510. In general, DataView® core features are for creating, viewing, editing, and storing DataView® reports; while the DTR® Control Panel is for connecting to, configuring, viewing measurements on, and downloading data from the instrument.

With DataView®, you’re always in control. Access powerful features directly through the DataView® icon for quick navigation across all your AEMC® instruments, or streamline your workflow with the DTR® Control Panel for fast, focused interaction with your DTR® instruments. Need to review and compare multiple archived reports? Our DataView® software makes it effortless, giving you maximum flexibility and efficiency in how you manage your data

Applications
Testing transformers (power, VT/PT, and CT)
Pole mount transformer continuity and ratio tests
Padmount single and three phase transformers continuity and ratio tests
Switchgear CPT (control power transformers) and CT
Nameplate verification, commissioning and maintenance testing of frequently used transformers in industrial power distribution
Quality control in transformer manufacturing and rewinding

What's included with the AEMC Instruments 2136.55
Digital Transformer Ratiometer
Set of 2 x 15' (4.5 m) Test Leads (primary and secondary)
4 x Alligator Clips (Red/Black)
6' (1.8 m) USB Type-C to Type-C Cable
10' (3 m) USB Type-A to Type-C Cable
6 x Internal Rechargeable AA NiMH Batteries (installed)
Extra Large Carrying Bag
AC Power Adapter with Cord
USB Type-C Wall Power Adapter
USB Drive with DataView® Software
Software and User Manual