HNB-Ⅱ Automatic variable ratio group tester with variable ratio transformer turns ratio measuring bridge, the procedure cumbersome, the measurement range is narrow, no longer meet the fast-paced, high-efficiency requirements of modern measurement. To this end, I am using the modern electronic technology, developed a new generation of automatic variable ratio group tester. It is small, light weight, high accuracy, good stability. It uses a large-screen character display, menu, friendly interface. Variable than the group can complete a survey. The instrument is ideal for the power industry sector testing equipment. Main functions and features 1. Automatic measurement wiring group. 2. Automatically group transformation. 3. Automatic switching phase sequence. 4. Automatic switching range. 5. Automatic calibration. 6. Enter the standard variable ratio, can automatically calculate the relative error. 7. The first measurement is completed, automatically cut off the test voltage. 8. Set the data, the measurement results are automatically saved, you can view the previous data. 9. Measure load transformer turns ratio is only entered once. The main technical indicators. Ratio measuring range: 1-100002. Group: 1-12 point 3. Accuracy: 1000-10000 1-1000 0.2 0.5 4. Power: AC220V ± 10%, 50HZ 5. Ambient temperature: -5 ℃ ─ 40 ℃ 6. Operating Humidity: <85% 7. volume: 430 × 320 × 215mm3 8. Weight: 8Kg Products Address: http: //www.whwghn.com/59/