Intelligent SF6 Gas Density Relay Calibrator

This product is an intelligent SF6 gas density relay calibration instrument . It has a built-in gas tank and filling pump, eliminating the need for external gas cylinders or other gas source equipment during calibration. If the gas tank pressure is insufficient during startup or calibration, it can automatically perform a filling operation and continue the calibration process after the filling pressure reaches the upper limit of the set value .

This calibrator employs a high-precision pressure sensor and a high-speed A/D converter, combined with a 32 -bit high-performance microprocessor, to perform performance calibration on various SF6 gas density relays . It accurately measures the pressure value at the current temperature when the signal is activated, automatically converts any ambient temperature to the standard pressure at 20 °C , and features printing, storage, and USB flash drive transfer functions . It also automatically identifies faults during the testing process. This product is portable, easy to operate, highly accurate, stable, and reliable , embodying the instrument's "intelligent" characteristics.

The instrument features high precision, high stability, and high reliability.

The density relay calibrator uses a 32-bit ARM microcontroller and a high-speed signal processing chip from TI for detection and control, resulting in a high degree of integration. Its mechatronics design ensures high accuracy, good repeatability, and high reliability.
Equipped with a 7-inch touchscreen color display and an English LCD screen human-machine interface, it is easy to operate, has a beautiful interface, and all parameters and statuses are clearly displayed.
It is equipped with functions for verifying electrical contact impedance, setpoint error, switching error, indication error, rated pressure indication error, and hysteresis error, and all values can be acquired in a single measurement.
It automatically completes pressure measurement and 20 °C value conversion, thus achieving dynamic automatic compensation between pressure and temperature. It displays the pressure at the measured ambient temperature, the pressure at the ambient temperature and 20 °C , and the ambient temperature. This completely solves the problem of difficult on-site calibration of SF6 gas density relays.
All testing processes are completed automatically by the instrument without human intervention. Once set up, the process is automatically tested, and the test results are intelligently judged.
It can store a large number of test results and has a power-off data protection function, allowing users to query and print previous test results at any time.
be performed on SF6 gas density relays and pressure gauges within any effective temperature range .
Equipped with various types of transition connectors, density relays for most switch models can be tested on-site without disassembly.
The calibration process does not require SF6 gas , resulting in low testing costs and no environmental pollution.
It features online pressure calibration , allowing for on-site correction.
The core components are imported, ensuring reliable performance.
It can simultaneously test 2 sets of alarm signals, 2 sets of interlock signals , and 1 set of overpressure signals .

• Online verification of SF6 high-voltage switches in power systems can be performed directly at the field without disassembling density relays, enabling alarm, interlocking, and overvoltage point verification.
• In the laboratory/maintenance workshop calibration room, we perform accuracy calibration on SF6 density relays, pressure gauges, and 20℃ density gauges, including full range, indication, and hysteresis error.
• The electrical contact performance test detects the on/off state and contact impedance of the density relay's electrical contacts to determine whether the contact is good.
• Preventive testing and periodic calibration shall be carried out in accordance with the DL/T standard to avoid malfunctions and failures of density relays and ensure safe operation of switches.
• Data management and report output include on-site storage, printing and verification reports, and data export via USB flash drive, meeting the needs of power operation and maintenance ledgers and acceptance.