ZGY-40A DC Resistance Tester adopts advanced microcontroller control technology, with screen display, Chinese operation interface, easy operation, and software preset gear shifting, providing fast measurement effects. It is suitable for measuring the DC resistance of inductive test objects such as transformer windings, mutual inductors, and motor windings in the power industry. It can also be used for measuring switch contact resistance, cable resistance, and general resistance.



2. Main Functions and Features

1. Uses high-precision A/D converter, with stable measurement data and good repeatability.

2. Test gear setting is convenient and fast.

3. Can print test results.

4. Uses backlit Chinese LCD display, with high clarity and friendly human-machine interface.



3. Main Technical Specifications

1. Resistance measurement range: 2mΩ~200Ω, minimum display resolution: 1μΩ

2. Resistance measurement accuracy: 0.2%±2 digits

3. Current source: 5A (2mΩ~200mΩ)

4. Working current: AC220V±10%

5. Dimensions: 400×300×190mm

6. Weight: 7Kg



4. Operating Methods:

1. Resistance measurement:

After the instrument is powered on or the "Reset" key is pressed, it enters the initial state. Press the "Measure" key to enter automatic testing, and after the test is completed, the measured resistance value is displayed.

2. Press the "Settings" key to change to the appropriate gear for measurement, and press the "Reset" key to save the
data and exit.

3. Press the "Standby" key to print data (if the instrument is equipped with a printer)



5. Wiring Methods:

For the current loop, use test leads with large clamps, and for the voltage loop, use test leads with small clips. The test leads should correspond in pairs. If connected incorrectly, the measurement will display "0".

For measurement convenience, the small clips can be attached to the other terminal of the large clamps, however, this is suitable for occasions where requirements are not very high.
6. Precautions

1. Choose the appropriate measurement gear to ensure test accuracy

2. The object under test must not be energized

3. If any abnormal situation occurs during measurement, press the "Reset" key or turn off the power. If normal operation cannot be restored, please contact our company and do not disassemble the instrument yourself.

7. Included Items

1. One power cord

2. One pair of test clamps

3. One certificate of conformity