YNMD-H automatic sf6 density relay tester is an intelligent SF6 density relay calibration instrument. The calibrator uses a high-precision pressure sensor and a high-speed A/D converter, combined with a 32-bit high-performance microprocessor, can perform performance verification on various SF6 density relays, and can accurately measure the pressure value at the current temperature when the signal is activated. , Automatically complete the conversion of any ambient temperature to the standard pressure at 20 ℃, and can print and store test data immediately for reference, and automatically identify faults in the test process. This product is convenient to carry, simple to operate, high test accuracy, strong stability, and good reliability, which embodies the "intelligent" characteristics of the instrument.

SF6 switch is a high-voltage electrical appliance widely used in power systems. The reliable operation of SF6 switch has become one of the concerns of power supply departments. The SF6 gas density relay is an important component used to monitor the change of the SF6 gas density in the SF6 switch body during operation. Its performance directly affects the operational safety of the SF6 switch. SF6 gas density relays operating on-site do not operate frequently. After a period of time, they often exhibit inflexible actions and poor contact contact. Some of the density relays have poor temperature compensation performance. When the ambient temperature changes suddenly, it often leads to SF6 density. The relay malfunctions. Therefore, DL/T596-1996 "Power Equipment Preventive Test Regulations" stipulates that each SF6 switch user unit should periodically check the SF6 gas density relay. From the actual operating situation, it is also very necessary to periodically verify the SF6 density relay and pressure gauge in the field operation.

1) This product uses a 32-bit microprocessor and TI's high-speed signal processing chip for detection and control, with a high degree of integration. Mechatronics design, high precision, good repeatability and high reliability.

2) Equipped with a large-screen Chinese LCD screen and a rotating mouse (one-button shuttle) man-machine interface, the operation is simple, the interface is beautiful, and all parameters and status are clear at a glance.

3) Automatically complete pressure measurement and 20°C value conversion, thereby completing dynamic automatic compensation between pressure and temperature. It also displays the pressure at the measured ambient temperature, the pressure at the ambient temperature at 20°C, and the ambient temperature. Thoroughly solve the problem of difficult on-site calibration of SF6 gas density relay.

4) All testing processes are automatically completed by the instrument without manual intervention, which avoids tedious manual airway adjustment operations.

5) The test results are printed as a report of Chinese characters, and the test results are intelligently analyzed.

6) It can store 50 sets of test results at the same time, and has the power-down data protection function, and the previous test results can be inquired and printed at any time.

7) There is no need for a constant temperature room during the calibration process, and the SF6 gas density relay and pressure gauge can be calibrated within any effective temperature range.

8) Equipped with various types of transition joints, the density relays of most types of switches can be verified on site without disassembly.

9) In the calibration process, the gas consumption is very small, SF6 gas is not wasted, the test cost is low, and it does not pollute the environment.

10) It has the function of online modification of the system clock.

11) It has the function of online modification of system pressure, which can be modified on site.

12) The core components are imported components with reliable performance.

13) It can test one group of alarm signals and two groups of blocking signals at the same time.

14) This product is a portable tool, easy to use and reliable, and it is the choice for SF6 density relay calibration.

1. Working voltage: AC220V, 50Hz

2. Instrument power: 50W

3. Instrument accuracy: 0.2 level

4. Pressure display resolution: 0.001MPa

5. Pressure calibration range: 0～1MPa

6. Ambient temperature display resolution: 0.1°C

7. Measuring range of ambient temperature: -20℃～80℃

8. Working humidity: £90%RH

9. Check object: single alarm, single lockout, single alarm and single lockout, single alarm and double lockout

10. Display mode: 320×240 graphic dot matrix monochrome LCD screen

11. Operation mode: Rotate the mouse (a shuttle) to input

12. Printer type: high-speed micro printer

13. Printing method: Chinese character report type printing

14. Storage capacity: 50 sets of test results can be stored at the same time

15. Overall dimensions: host 365×300×220(mm3)

Attachment box 400×370×200(mm3)

16. SF6 gas density display mode: the pressure under the measured environment, the equivalent pressure at 20°C.

17. Instrument weight: 8kg