This document provides instructions for using the YDZ-40A DC resistance rapid tester, including the features and operating instructions of the product.
The YDZ-40A is a compact, lightweight direct‑current resistance tester designed for fast measurement of transformer windings and high‑power inductive loads. It uses a four‑wire measurement method with programmable constant‑current source, pre‑amplifier and A/D conversion to achieve high accuracy and rapid results.
The manual provides safety guidelines, panel description, quick‑start procedures, technical specifications, data storage and printing functions, as well as fault analysis and after‑sales service information. This manual is written in Chinese.
| Maximum Test Current | 40 A |
|---|---|
| Test Current Settings | 2.5 A, 5 A, 10 A, 20 A, 40 A |
| Maximum Power Consumption | 900 W |
| Measurement Accuracy | ±0.2 % |
| Display | 128 × 64 dot‑matrix LCD |
| Data Storage Capacity | 255 test records |
| Power Supply Voltage | AC 220 V ±10 % 50/60 Hz |
| Dimensions (W × H × D) | 390 mm × 330 mm × 220 mm |
| Weight | 13 kg |
The instrument can store up to 255 test data records.
The product has a one‑year warranty with free repair during the first year and paid lifetime repair thereafter.