EN
GDSZ-402G Fully Automatic Insulation Oil Acid Tester (6-Cup, Colorimetric Titration, 0.0001mgKOH/g Resolution)
GDSZ-402G Digital Intelligent Fully Automatic Insulating Oil Acid Value Tester with 6 Independent Test Stations, Peristaltic Pump Metering, Photoelectric Colorimetric Endpoint Detection, Automatic Cleaning System, for Power Transformer Insulating Oil Quality Assessment.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDSZ-402G is a professional-grade, high-throughput fully automatic insulating oil acid value testerexclusively designed for aging degree assessment of insulating oil used in power transformers, instrument transformers, capacitors and other oil-filled electrical equipment. It fully complies with GB/T 264-1983, GB/T 7599-2008, ASTM D974-2020 and IEC 62021-1:2020 standards, adopting the internationally recognized extraction neutralization titration method combined with high-precision photoelectric colorimetric endpoint detection technology.
The instrument features six independent test stations that allow simultaneous testing of 1 to 6 different samples or parallel samples, greatly improving test efficiency. Its innovative ARM microprocessor control system ensures stable and reliable operation, while the imported peristaltic pump provides accurate and consistent reagent metering. The unique photoelectric colorimetric endpoint detection system uses white LED illumination and high-sensitivity photodiodes to accurately capture the color change of the indicator, eliminating the interference of dark oil color on test results.
Specifications
| Parameter | Specification |
|---|---|
| System Parameters | |
| Compliance Standard | GB/T 264-1983, GB/T 7599-2008, ASTM D974-2020, IEC 62021-1:2020 |
| Test Principle | Extraction neutralization titration + photoelectric colorimetric endpoint detection |
| Test Stations | 6 independent test stations |
| 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 | 0.0001 ~ 2.0000mgKOH/g |
| Resolution | 0.0001mgKOH/g |
| Measurement Accuracy | ≤±0.002mgKOH/g (0.001~0.1000mgKOH/g); ≤±5% of reading (0.1000~2.0000mgKOH/g) |
| Repeatability | ≤0.002mgKOH/g |
| Test Time | ~7 minutes per sample, ~25 minutes per batch (6 samples) |
| Sample Consumption | ~8~10g per test |
| Temperature Control | |
| Temperature Setting | 60℃ (standard) |
| Temperature Control Accuracy | ±1℃ |
| Temperature Resolution | 0.1℃ |
| Oscillation Frequency | 120 times/min |
| Oscillation Time | 5 minutes (adjustable) |
| Reagent Metering | |
| Pump Type | Imported peristaltic pump |
| Flow Accuracy | ±0.5% |
| Power Supply | |
| Input Power | AC 220V±10%, 50Hz |
| Power Consumption | ≤200W |
| Physical Parameters | |
| Dimensions | 420×350×280mm (L×W×H) |
| Weight | ~15kg (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, turbine oil
- Petrochemical industry oils: Lubricating oil, hydraulic oil, gear oil, fuel oil
- Oil-filled equipment: Power transformers, instrument transformers, capacitors, circuit breakers, reactors
Typical Usage Scenarios
- Power companies: Transformer preventive maintenance, insulating oil regular testing, aging degree assessment
- Transformer manufacturers: Factory quality control, type tests, after-sales service
- Oil treatment companies: Insulating oil regeneration quality inspection, oil treatment effect evaluation
- 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 GB/T 7599-2008 Chinese national standard, ASTM D974 American standard and IEC 62021-1 international standard → test results are recognized worldwide
Industry-Leading 6-Cup Simultaneous Test
Can test up to 6 samples simultaneously, improving test efficiency by 500% → saves time and labor costs for high-volume testing
High-Precision Photoelectric Endpoint Detection
Unaffected by the color of dark oil products, with an ultra-high resolution of 0.0001mgKOH/g, and precision in the low acid value range reaching ±0.002mgKOH/g → accurately detecting early signs of insulating oil aging
One-Click Fully Automatic Operation
Automatically completes all test steps including heating, oscillation, extraction, titration and cleaning → reduces operator skill requirements and eliminates human errors
Built-In Automatic Cleaning System
Cleans pipelines and test cups automatically after each test → eliminates cross-contamination between samples, ensures result reliability
FAQ
Q: What is the principle of the extraction neutralization titration method for acid value testing?
A: The principle is based on the acid-base neutralization reaction. A certain mass of oil sample is mixed with a specific volume of extraction solvent (boiling ethanol), heated to 60℃ and oscillated to extract the acidic components from the oil into the ethanol phase. After oil-water separation, BTB indicator is added to the ethanol phase. The solution is then titrated with standard KOH-ethanol solution until the color changes from yellow to blue-green. The acid value is calculated based on the volume of KOH solution consumed, expressed in mg KOH per gram of oil sample.
Q: How does the photoelectric endpoint detection work?
A: The instrument uses white LED light to illuminate the test solution, and a high-sensitivity photodiode to detect the transmitted light intensity. When the solution color changes from yellow to blue-green at the titration endpoint, the transmitted light intensity changes significantly. The instrument automatically captures this change and determines the endpoint accurately, eliminating the subjective error of manual visual judgment and the interference of dark oil color.
Q: How long does a typical test take?
A: A single sample test including heating to 60℃, oscillation, static layering, titration and result calculation takes approximately 7 minutes. For 6 samples tested simultaneously, the total test time is approximately 25 minutes. This is much faster than manual testing which usually takes 30~60 minutes per sample.
Q: Can it test dark or heavily aged oil samples?
A: Yes. The photoelectric colorimetric endpoint detection system is specifically designed to eliminate the interference of dark oil color. It can accurately determine the titration endpoint even for heavily aged dark brown or black transformer oil samples, which is a significant advantage over manual visual titration.
