This user manual explains safe operation, charging, specifications, connections, and usage procedures for the Wuhan Nanruo Electric test instrument.
The manual provides an introduction to the test instrument, lists the packaging contents, and describes its main features such as a 5.6‑inch high‑brightness LCD screen, dual power options (lithium‑battery or 220 V AC), and built‑in thermal printer. It also details technical specifications, battery charging procedures, and protective functions.
Operational instructions cover wiring for single‑phase and three‑phase transformer testing, blind‑test mode, data storage on internal memory or USB flash drive, and printer paper replacement. Safety precautions and maintenance tips, including regular charge‑discharge cycles for the battery, are also included. This manual is written in Chinese.
| Display | 5.6‑inch high‑brightness color LCD screen |
|---|---|
| Power Supply | Lithium‑battery or 220 V AC adaptive power |
| Ratio Measurement Range | Up to 10 000 |
| Accuracy | 0.3 % at full scale (10 000) |
| Charging Indicator | Red light while charging, green when fully charged |
| Protection Functions | Reverse polarity and output short‑circuit protection |
| Printer | Built‑in thermal printer for data printing |
| Data Storage | Internal storage and USB flash‑drive storage |
Close the power, and perform a charge‑discharge cycle at least once a month; avoid deep discharge as it shortens battery life.
The charger’s light glows red while the battery is charging and turns green when charging is complete.
Connect the high‑voltage red test line’s yellow/green clamps to the transformer’s high‑voltage side, and the low‑voltage black test line’s yellow/green clamps to the low‑voltage side.