Digital Transformer Turns Radiometer Model 8511

Specifications

• VT / PT Ratio Range Auto-Ranging 0.8000:1 to 8000.0:1

• VT / PT Accuracies

  • Ratio 0.8000 to 9.9999: ± 0.2 % of Reading

  • Ratio 10.000 to 999.99: ± 0.1 % of Reading

  • Ratio 1000.0 to 4999.9: ± 0.2 % of Reading

  • Ratio 5000.0 to 8000.0: ± 0.25 % of Reading

• Excitation Current Up to 2 A

• CT Ratio Range Auto-Ranging 0.8000 to 1000.0

• CT Accuracy ± 0.5 % of Reading

• Output Voltage (VT / PT) 30 V @ 64 Hz

• Output Voltage (CT) 5 V @ 64 Hz

• Display LCD 20 characters x 4 line display

• Wide Ratio Range – Accurately measures transformer ratios up to 8000:1 for VT/PT mode and 1000:1 for CT mode

• 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

• PC Connectivity – Transfer data, set nameplate values and control the instrument remotely with included DataView® software

• 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 Vdc external supply. Batteries can be recharged through USB-C connector or 12 Vdc external supply.

• User-Friendly Interface – Bright backlit 4-line display, intuitive navigation keys, and audible test alerts

Precision, Accuracy, and Confidence in Every Test

The DTR® 8511 is the next-generation digital transformer ratiometer, engineered to make transformer testing faster, safer, and more reliable than ever. Building on the proven performance of the DTR® 8510, this enhanced model introduces modern upgrades for the field—combining rugged portability with advanced measurement technology

How the DTR® 8511 Improves on the DTR® 8510

• Improved Test Performance

• Matches the same ratio and accuracy ranges as the 8510, but with improved test power. It delivers fixed test voltages (30 Vac for VT/PT, 5 V for CT), and uses a 64 Hz test frequency for a more accurate field simulation. Additional enhancements include advanced continuity checks and improved diagnostics.

• Smarter Data Storage and Memory

• Both models can store up to 99 objects with 99 tests each. With the older DTR® 8510, nameplate values can only be edited through DataView®. The DTR® 8511 improves flexibility by offering 10 fixed nameplate ratios plus one customizable ratio, editable directly from the instrument or via software. It also supports manual, automatic, or no-save testing modes for greater control and efficiency.

• Larger, Brighter Display and Easier Navigation

• Upgraded 4-line LCD with a 6-button keypad and audible alerts for clearer visibility and more intuitive use.

• More Convenient Power Options

• AA NiMH batteries or 12Vdc and charges via USB-C or 12 Vdc.

Designed for Field Technicians

No hand cranking. No calibration. No wasted time.

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.

In The Box

• Includes (6) internal rechargeable AA NiMH batteries

• Extra large carrying bag

• Set of (2) 15 ft test leads (primary and secondary) with (4) alligator clips (red/black)

• 6 ft USB Type-C to Type-C cable

• USB Type-C wall power adapter

• 10 ft USB

• Type-A to Type-C cable

• AC power adapter w/cord and USB drive with DataView® software and user manual