This document is the user manual for HTZZ-1A DC Resistance Fast Tester produced by Wuhan Huatian Power Automation Co., Ltd. It provides instructions and precautions for using the instrument.
The HTZZ-1A DC resistance quick tester, developed by Huati An, is designed for fast, high‑accuracy measurement of DC resistance in power transformers, large motors, inductive loads and contact resistance of low‑voltage switches. It replaces traditional bridge meters, offering a measurement range of 1 µΩ to 2 kΩ and a testing speed over a hundred times faster.
Key features include a constant‑current source up to 1 A, four‑wire measurement, LCD display, automatic arc‑suppression, and a built‑in rechargeable 12 V battery for portable AC/DC operation. The manual covers safety requirements, panel layout, working principle, step‑by‑step usage, fault diagnosis and maintenance advice. This manual is written in Chinese.