EN
GDOH-II Fully Automatic Insulating Oil Gas Content Tester
GDOH-II Digital Intelligent Fully Automatic Insulating Oil Gas Content Tester with Vacuum Differential Pressure Technology, All-Metal Degassing Chamber, Imported Differential Pressure Sensor, Automatic Standard Value Conversion, for Power Transformer Insulating Oil Gas Content Detection.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDOH-II is a professional-grade, fully automatic insulating oil gas content testerexclusively designed for quality assessment of insulating oil used in power transformers, instrument transformers, capacitors and other oil-filled electrical equipment. It fully complies with DL/T 423-2009, GB/T 7595-2017 and IEC 60567-2011 standards, adopting the internationally recognized vacuum differential pressure method (DL/T 423 Method A) that provides accurate and reliable measurement results.
The instrument features an innovative all-metal sealed degassing chamber that eliminates the fragility and poor sealing problems of traditional glassware testers. Its built-in high-precision imported electronic differential pressure sensor ensures stable and accurate pressure measurement, with a minimum detection limit of ≤0.2%. With one-click fully automatic operation, it completes the entire test process including sample injection, pipeline flushing, vacuum degassing, pressure measurement, standard value conversion and result printing without manual intervention.
Specifications
| Parameter | Specification |
|---|---|
| System Parameters | |
| Compliance Standard | DL/T 423-2009, GB/T 7595-2017, IEC 60567-2011, ASTM D3612 |
| Test Principle | Vacuum differential pressure method (DL/T 423 Method A) |
| Operation Mode | Fully automatic one-click test |
| Display | 7-inch 800×480 color touch screen |
| Data Storage | 1000 groups test results |
| Data Export | USB 2.0 (Excel format) |
| Printer | High-speed thermal printer, 58mm paper width |
| Test Parameters | |
| Test Range | 0.1% ~ 10% (volume fraction) |
| Minimum Detection Limit | ≤0.2% |
| Accuracy | Meets DL/T 423-2009 precision requirements |
| Test Time | ≤7 minutes per sample |
| Sample Consumption | ~40mL per test (including flushing) |
| Temperature Control | |
| Temperature Range | Room temperature +5℃ ~ 70℃ |
| Temperature Accuracy | ±0.5℃ |
| Temperature Resolution | 0.1℃ |
| Degassing Chamber | |
| Material | Stainless steel |
| Volume | ~300mL |
| Ultimate Vacuum | ≤5Pa |
| Vacuum System | |
| Pump Type | Built-in rotary vane vacuum pump |
| Pumping Speed | 2L/s |
| Power Supply | |
| Input Power | AC 220V±10%, 50Hz |
| Power Consumption | ≤350W |
| Physical Parameters | |
| Dimensions | 450×325×350mm (L×W×H) |
| Weight | ~20kg (including all components) |
| Housing | Cold-rolled steel with electrostatic spraying |
| Protection Grade | IP40 |
| Operating Temperature | 5℃ ~ +40℃ |
| Storage Temperature | -20℃ ~ +60℃ |
| Humidity | ≤85% RH (non-condensing) |
Applications
Core Test Objects
- Power industry oils: Transformer oil, switch oil, capacitor oil, cable oil
- Oil-filled equipment: Power transformers, instrument transformers, capacitors, circuit breakers, reactors
Typical Usage Scenarios
- Power companies: Transformer preventive maintenance, insulating oil regular testing, fault diagnosis
- Transformer manufacturers: Factory quality control, type tests, after-sales service
- Oil treatment companies: Insulating oil regeneration quality inspection, vacuum oil filtration process control
- Third-party testing institutions: Oil quality testing, performance assessment, quality arbitration
- Industrial enterprises: Internal power equipment oil testing and maintenance
Advantages
Compliance with Latest International Standards
Fully meets DL/T 423-2009 Chinese power industry standard, GB/T 7595 national standard and IEC 60567 international standard → test results are recognized worldwide
Industry-Leading Vacuum Differential Pressure Technology
All-metal sealed degassing chamber and imported high-precision sensor → ensures accurate and reliable measurement results, no leakage, long service life
7-Minute Ultra-Fast Test
Complete test in less than 7 minutes, 3 times faster than traditional methods → greatly improves test efficiency
One-Click Fully Automatic Operation
Automatically completes all test steps including flushing, degassing, measurement and conversion → reduces operator skill requirements and eliminates human errors
Automatic Standard Value Conversion
Built-in atmospheric pressure and temperature sensors, automatically converts results to standard state → ensures test results are comparable in different altitude regions
Comprehensive Data Management Function
1000 groups data storage, USB export and automatic printing → simplifies data management and report generation
FAQ
Q: What is the principle of vacuum differential pressure method for gas content detection?
A: The principle is based on Henry's law: when a certain volume of oil sample is placed in a sealed vacuum chamber, the dissolved gas in the oil will be released due to the reduced pressure. By measuring the pressure difference generated by the released gas, combined with the oil sample volume, temperature and atmospheric pressure, the gas content of the oil sample in the standard state (0℃, 101.3kPa) can be accurately calculated. This method is the international standard method for insulating oil gas content detection.
Q: How long does a typical test take?
A: A complete test including pipeline flushing, heating to test temperature, vacuum degassing, pressure measurement and result calculation takes approximately 6~7 minutes. This is much faster than traditional gas chromatography methods which usually take 30~60 minutes.
Q: Does it require external gas sources or reagents?
A: No. GDOH-II adopts a fully integrated design with built-in vacuum pump and all necessary components. It does not require any external gas sources, carrier gases or chemical reagents, making it very convenient to use and low in operating cost.
Q: How to calibrate the instrument?
A: The instrument has a built-in standard gas injection calibration program. Users can inject a known volume of standard air into the degassing chamber, and the instrument will automatically calculate the calibration coefficient and adjust the measurement results. This calibration method is simple, fast and accurate.
Q: Can it be used for on-site testing?
A: Yes. GDOH-II has a compact and portable design with a total weight of only 20kg. It does not require any external auxiliary equipment and can be easily transported to the site for testing. It is suitable for both laboratory and on-site applications.
