This document is a user manual for the YDZ-40A DC Resistance Fast Tester, which describes the features and performance of the product.
The ZDZ-40A is a compact, lightweight DC resistance quick test instrument designed for fast, accurate measurement of transformer windings and large inductive loads. It uses a four‑wire method with a constant‑current source, A/D conversion, and a built‑in microcontroller to display resistance values on a 128×64 dot‑matrix LCD.
The manual provides safety guidelines, detailed panel descriptions, step‑by‑step operation, data storage and printing functions, as well as fault analysis and maintenance procedures to ensure reliable use in the field. This manual is written in Chinese.
| Maximum test current | 40A |
|---|---|
| Available test currents | 2.5A, 5A, 10A, 20A, 40A |
| Maximum power consumption | 900W |
| Measurement accuracy | 0.2% |
| Display type | 128×64 dot matrix LCD |
| Data storage capacity | 255 records |
| Maximum resolution | 0.1Uie |
| Power supply | AC 220V 50Hz |
| Dimensions | 390×430×220 mm |
| Weight | 13 kg |
The instrument can store up to 255 test data records.
The maximum test current is 40 A.
Press the reset button located at the lower left of the display; stored data will not be lost.