Intelligent High-Precision Automatic SF6 Density Relay Calibrator | Portable

Product Specification

Intelligent High-Precision Automatic SF6 Density Relay Calibrator | Portable Aluminum Alloy Tester for Gas Engineering Applications

Product Description

This automatic SF6 density relay calibrator is a professional testing instrument designed for performance verification and calibration of SF6 gas density relays and matching pressure gauges. As a core safety protection component of SF6 insulated high-voltage equipment, the density relay is directly related to the insulation strength and arc extinguishing capability of electrical systems. This calibrator provides a highly accurate, efficient and reliable testing solution for power maintenance teams, electrical equipment manufacturers and gas engineering contractors.Adopting intelligent automatic control technology and high-precision sensing components, this device realizes full-process automated calibration, which solves the problems of low efficiency and large manual error in traditional calibration methods. Its portable integrated design supports flexible on-site testing without disassembly of the relay, helping users quickly evaluate the working condition of SF6 density relays, eliminate potential equipment hazards, and ensure the safe and stable operation of high-voltage power systems.Widely used in substations, thermal and hydropower plants, new energy power stations and electrical equipment production lines, this calibrator is an essential tool for SF6 equipment installation, commissioning, daily maintenance and fault diagnosis.
Product Alias

SF6 Density Relay Calibrator

Automatic SF6 Gas Density Relay Tester

Portable SF6 Relay Calibration Equipment

High Precision SF6 Density Switch Tester

On-site SF6 Relay Test Device

SF6 Gas Relay Calibration Instrument

Features

• High-Precision Measurement Performance Built with a premium pressure sensor and intelligent temperature compensation algorithm, it delivers highly accurate readings of alarm pressure, locking pressure, action value and return value, fully meeting industry calibration standards for power systems.
• Fully Automatic Calibration Workflow It automatically completes pressure rise & fall control, data collection, error calculation and result analysis without manual repeated adjustment, greatly improving on-site calibration efficiency and minimizing human operation errors.
• Portable & Rugged Integrated Design Housed in a heavy-duty shockproof and dustproof protective case, the device is compact, lightweight and easy to carry. It is suitable for outdoor field work and can adapt to complex working environments in substations and power plants.
• Intelligent Data Output & Management A high-definition LCD screen displays real-time test data and pressure curves intuitively. The built-in thermal printer supports instant on-site report printing, and the data interface allows test records to be exported and archived for traceability.
• Wide Equipment Compatibility It is compatible with SF6 density relays and pressure gauges of various brands, specifications and ranges, and is applicable to GIS, SF6 circuit breakers, current transformers and other SF6-insulated high-voltage electrical equipment.
• Simple & User-Friendly Operation The clear panel layout and fine-tuning pressure knob enable straightforward operation. A single technician can complete the full calibration process independently, effectively reducing on-site workload and labor costs.

Product Parameters

Application Scenarios

(Scenarios covered in the images: Widely used in substations, power plants, GIS workshops and electrical testing labs for on-site calibration, routine maintenance and quality inspection of SF6 density relays.)
Frequently Asked Questions from Customers

Question 1: No Pressure Build-Up During Calibration

Customer: We have connected the calibrator to the on-site SF6 density relay and started the calibration program, but the panel pressure gauge stays at zero and no pressure builds up, making it impossible to complete the test. What may cause this issue?
Manufacturer: This is a common on-site issue mostly related to gas circuit connections. We recommend troubleshooting step by step: first, check the standard SF6 gas supply, confirm the cylinder valve is fully open and the residual gas pressure is sufficient for the test; second, inspect all gas connectors on the inlet, measurement and outlet ports, make sure each fitting is tightly screwed and the built-in sealing ring is not damaged or dislodged; third, check if the pressure adjustment knob is fully closed, slowly turn it to increase pressure and observe the gauge reading; additionally, briefly open the vent valve to check for gas outflow, which can rule out internal gas path blockage. If none of the above steps resolve the issue, please contact us promptly and do not disassemble the device on your own.
Question 2: No Relay Action Signal Detected

Customer: During automatic calibration, the gas pressure has reached the nominal alarm value of the relay, but the device fails to capture any action signal and the calibration process runs continuously without stopping. How do we troubleshoot this?
Manufacturer: This issue usually stems from signal circuit connection errors or parameter mismatches. Please follow the steps below to inspect: first, verify the signal wiring between the calibrator and the relay auxiliary contacts, and confirm you have selected the correct normally open / normally closed contact type matching the relay; second, use a multimeter in continuity mode to test the relay auxiliary contacts, check if the contact switches normally with pressure changes, and clean oxidized contact surfaces if necessary; third, enter the device settings to confirm the signal acquisition mode matches the on-site wiring scheme. If the fault persists after inspection, please contact our technical support for further guidance.
Question 3: Poor Repeatability of Calibration Results

Customer: When we calibrate the same density relay twice in succession, the measured alarm and locking pressure values show obvious deviation, and the data repeatability is poor. What leads to this instability?
Manufacturer: Inconsistent calibration results are usually affected by environmental conditions, air tightness or operation habits. Please check the following aspects: first, ensure the ambient temperature is stable during the test, as temperature fluctuations directly affect SF6 gas density conversion; it is recommended to let the relay and calibrator acclimatize at the test site for 30 minutes before formal testing; second, perform a pressure-holding test to check for micro-leaks in the gas circuit: if the pressure drops significantly within 5 minutes, re-tighten all connectors and replace worn sealing rings; third, slow down the pressure adjustment speed, as excessively fast pressurization or depressurization will cause data acquisition lag and reading deviation. For long-term use, we also recommend periodic verification of the device with a standard pressure gauge to maintain its accuracy.
Question 4: Built-in Printer Does Not Print Test Reports

Customer: After the calibration is completed, we press the print button but the built-in thermal printer does not respond, and no test report is output. How can we solve this problem?
Manufacturer: Printing failures are mostly caused by paper loading issues or temporary program glitches. Please check in this order: first, open the printer compartment to confirm the thermal paper roll is loaded correctly with the heat-sensitive side facing up, and there is no paper jam inside; second, check if the paper roll is exhausted, and replace it with a new standard thermal paper roll if needed; third, restart the device to rule out temporary program freezing, and try printing again after re-entering the result page. Do not pull the paper forcibly during printing, as this may damage the print head. If the printer still fails to work, please contact us for replacement parts or maintenance service.
Shipping scenario

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