The relay protection tester is suitable for the opening and closing time measurement of single-circuit empty contacts or live contacts, the measurement of positive and negative pulse width, the measurement of the time interval of dual-channel signals and the entire group test. This instrument has complete functions, a single machine can complete all the tests in the above scope of application at one time, strong applicability, measurement time, AC and DC voltage and current are all digitally displayed, the relay protection tester has intuitive and accurate readings, button operation, convenient and flexible, and key components are used Imported components, stable performance, safe and reliable, modular design of the whole machine, easy to maintain, small in size, light in weight and easy to carry, it is an advanced new type of relay protection calibrator with higher performance and price ratio.

1. Verify the availability of equipment

Before using the instrument, observe whether the appearance of the instrument is damaged. After power on, check whether the meter head of the instrument has a display and whether the display is complete. For the instrument that has not been used for a long time, check whether the output part of the terminal is rusted or aging, otherwise it should be cleaned up in time before use. Please refer to the "use operation" method when using it.

2. Equipment maintenance

After each test is completed, clean the connection on the terminal of the instrument, turn off the power, disconnect the power plug, close the case cover, and place it in a dry, dust-free, ventilated and non-corrosive room.

3. How to replace the fuse

The fuse of the instrument is connected with the power socket of the instrument as a whole. When replacing, first unplug the power cord and use a small flat-head screwdriver to pull out the fuse box from above.