Innovations in Insulating Oil Air Content Testing: The ZXHQ Tester

For technicians and engineers responsible for the maintenance and diagnostics of high-voltage electrical equipment, accurate measurement of air content in insulation oil is critical. Dissolved gases can compromise dielectric strength, accelerate oil aging, and potentially lead to equipment failure. Traditional glass tube methods, while standardized, are often prone to fragility, sealing issues, and operator-dependent results. The ZXHQ Insulation Oil Air Content Tester represents a significant technological leap forward, addressing these challenges with a robust, automated, and highly precise solution based on the differential pressure method.

Technical Principle and Standard Compliance
At its core, the ZXHQ tester employs the vacuum pressure difference method, adhering to the DL423-91 standard. It replaces the traditional, delicate glass apparatus with a fully sealed metal structure. The process involves creating a vacuum in a test chamber containing a degassed oil sample. The key innovation is the use of a high-precision, high-stability differential pressure sensor. This sensor meticulously measures the minute pressure change caused by the release of dissolved gases from the oil sample. This measured pressure differential is then accurately converted into air content percentage, achieving a remarkable sensitivity of <0.2%.

Key Features and Operational Advantages
The device is designed for efficiency, reliability, and user-friendliness in a technical setting:

1.Automation & Data Integrity: The process is fully automated—from quantitative sampling and measurement to data display, storage (up to 20 results), and oil discharge. This minimizes human error and ensures consistent, repeatable operations. The stated repeatability is <10% for multiple tests on the same sample.

2.Environmental Compensation: A built-in sensor automatically measures real-time ambient temperature and atmospheric pressure. The system then automatically calculates and displays the air content normalized to standard conditions (101.3 kPa, 0°C), ensuring comparable results regardless of testing location or weather.

3.Robust Construction & Calibration: The all-metal design eliminates the breakage and sealing woes of glassware. A unique, integrated software program facilitates straightforward gas injection for on-site calibration and recalibration, maintaining long-term measurement accuracy.

4.Simplified Operation: Technician workflow is streamlined. After connecting just a single gas supply line and the vacuum pump, starting the test is a one-button operation. Results are displayed in approximately 7 minutes. The entire process, including vacuum pump control, is managed automatically with low operational noise.

Technical Specifications at a Glance

5.Measuring Range: 0.1% to 10% (Air Content by Volume)

6.Sensitivity: <0.2%

7.Repeatability: <10%

8.Power Supply: AC 220V ±10%, 50 Hz

9.Dimensions (WxDxH): 400 x 324 x 345 mm

10.Weight: Approximately 20 kg

Conclusion
     For the technical professional, the ZXHQ Insulation Oil Air Content Tester is more than just an instrument; it is a reliable partner in condition monitoring. It transforms a previously meticulous and fragile laboratory procedure into a robust, field-deployable, and highly reliable automated test. By leveraging advanced differential pressure sensing and comprehensive automation, it delivers precise, repeatable data crucial for assessing insulation oil health and, by extension, the reliability of critical electrical assets. Its design prioritizes practical use, saving time, reducing error, and enhancing the overall confidence in diagnostic outcomes.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/