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HF-TC-621 Portable Dissolved Gas Analyzer
This Portable Dissolved Gas Analyzer applies advanced photoacoustic spectroscopy to detect eight gases and trace moisture in transformer oil in just 20 minutes. Lightweight under 10kg, it supports on-site sampling, mass data storage and built-in algorithms to diagnose potential transformer faults efficiently for substation daily maintenance.
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Accurate monitoring of the operating condition of power transformers is essential for all power utilities. Collected measurement data facilitates scheduled transformer maintenance and effectively prevents unexpected equipment failures.
Dissolved Gas Analysis (DGA) is universally recognized as the most effective predictive maintenance technology to detect incipient faults in oil-filled electrical apparatus. It is widely adopted for routine condition assessment of oil-immersed power transformers, reactors, instrument transformers, on-load tap changers, circuit breakers, oil-filled bushings and other power assets. Monitoring the composition and concentration of dissolved gases in insulating oil is the prime solution to guarantee the safe operation of oil-filled electrical equipment.
The HF-TC-621 Dissolved Gas Analyzer performs multi-component dissolved gas testing based on Photoacoustic Spectroscopy (PAS). The PAS technology delivers ultra-precise detection with a short optical path. Its superior sensitivity originates from the patented enhanced cantilever optical microphone technology, enabling a linear dynamic range ratio up to 5 orders of magnitude.
Seven narrow-band optical filters realize sub-ppm detection limits, eliminating interference from background gases and minimizing cross-sensitivity across different spectral bands. Built around infrared photoacoustic spectroscopy, the instrument is equipped with pulsed infrared light sources that generate seven mid-infrared spectral bands via narrowband filters for comprehensive multi-gas analysis.
Core Advantages & Key Features
- Sub-ppm level detection limit for trace gas measurement
- Extra-long calibration interval: ranging from more than 10 months to several years
- Consumable-free design; purely physical detection method without chemical reagents
- Independent, constant built-in gas exchange system
- Intuitive single-point user calibration, wide dynamic range, compact short optical path
- High-resolution graphical display interface
- Abundant programmable measurement tasks
- Configurable response time: adjustable from several seconds to several minutes
- Stable performance under wide dynamic range & continuous operation
- Hydrogen sensor service life exceeds 4 years
- Customizable monitoring tasks by operators
- Graph & table display for all gas measurement readings
- Built-in trend viewing function for monitoring tasks; no external PC required
- Zero consumables throughout service life
Technical Specifications
Gas Measuring Range
| Gas Component | Lower Detection Limit | Upper Measuring Limit |
|---|---|---|
| Hydrogen (H₂) | 5 ppm | 5,000 ppm |
| Methane (CH₄) | 0.5 ppm | 50,000 ppm |
| Ethane (C₂H₆) | 0.5 ppm | 50,000 ppm |
| Ethylene (C₂H₄) | 0.5 ppm | 50,000 ppm |
| Acetylene (C₂H₂) | 0.5 ppm | 50,000 ppm |
| Carbon Monoxide (CO) | 5 ppm | 50,000 ppm |
| Carbon Dioxide (CO₂) | 5 ppm | 50,000 ppm |
| Nitrogen (N₂) | 0.5% | 80% |
| Oxygen (O₂) | 0.1% | 50% |
| Humidity (Trace Water Content) | 0% RH | 90% RH |
Physical & Mechanical Parameters
| Item | Technical Data |
|---|---|
| Operating Ambient Temperature | +5 °C ~ +50 °C |
| Sample Oil Temperature Range | 0 °C ~ +45 °C |
| Storage Temperature | -30 °C ~ +80 °C |
| Ambient Humidity | ≤90% RH (non-condensing @ 30°C) |
| Vibration Resistance | Complies with IEC 60068-2-6 (Fc test standard) |
| Shock & Drop Resistance | Complies with IEC 60068-2-31 & ISTA 1A |
| Input Power Frequency | 47 ~ 63 Hz |
| Universal Power Input | 90 ~ 250 VAC |
| Net Weight | ＜ 15 kg |
| Overall Dimensions | 484 mm (W) × 139 mm (H) × 440 mm (D)
19.1 in (W) × 5.5 in (H) × 17.3 in (D) |
| Gas Cell Volume | ＜ 30 ml |
| Max Oil Volume in Extraction Unit | ≤ 50 ml |
| Dynamic Range | 500 ~ 50,000 |
| Zero Drift | ± Detection Limit / per month |
| Measurement Repeatability | ±5% of measured value (under reference conditions) |
| Span Drift | ±5% of measured value / 12 months |
| Overall Accuracy | ±5% of reading OR ±2 ppm (whichever is larger)
±1% RH for water humidity (0~90% RH) |
Compliance Standards
EMC & Electromagnetic Compatibility
- EN61326-1:2006 Radiated Emission (Class A)
- EN61326-1:2006 Conducted Emission (Class A)
- EN61000-3-2:2000 Harmonic Current Emission
- EN61000-3-3:2001 Voltage Fluctuation & Flicker Test
- IEC61000-4-2:2001 ESD Immunity
- IEC61000-4-3:2002 Radiated RF Immunity
- IEC61000-4-4:2001 Electrical Fast Transient Burst Immunity
- IEC61000-4-5:2001 Surge Immunity
- IEC61000-4-6:2001 Conducted RF Immunity
- IEC61000-4-8:2001 Power Frequency Magnetic Field Immunity
- IEC61000-4-11:2001 Voltage Dips, Short Interruptions & Voltage Variations
Safety Certification Standards
- EN 61010-1:2001
- IEC 61010-1
- UL 61010-1
- CAN/CSA-C22.2 No.61010-1
- EN 50270:2006
Packing List: Portable Dissolved Gas Analyzer
| Serial No. | Item Description | Quantity | Unit | Supplementary Notes |
|---|---|---|---|---|
| 1 | Portable Dissolved Gas Analyzer Main Unit (DK-200P) | 1 | Set | Core testing host |
| 2 | Oil Sampling Probe, Sampling Tube & Sealed Connection Fittings | 1 | Set | For transformer insulating oil extraction |
| 3 | Universal AC Power Cord & Power Adapter | 1 | Piece | 90-250V wide voltage compatible |
| 4 | USB Data Transmission Cable | 1 | Piece | For test data export to PC |
| 5 | Full English Operation & Maintenance Manual | 1 | Copy | Detailed operation, calibration & troubleshooting guide |
| 6 | Factory Calibration Certificate & Inspection Report | 1 | Copy | Official metrology calibration document |
| 7 | Shockproof Hard Rolling Transport Case | 1 | Piece | Dustproof, waterproof, anti-collision for field transportation |
| 8 | Spare Sealing Rings, Filter Accessories | 1 | Set | Consumable spare parts for daily replacement |
| 9 | Quick Start Guide | 1 | Copy | Simplified operation handbook for on-site technicians |
FAQ for Portable Dissolved Gas Analyzer
Q1: What working principle does this portable dissolved gas analyzer adopt?
A: It applies advanced infrared photoacoustic spectroscopy (PAS) technology with patented enhanced cantilever optical microphone. It realizes sub-ppm trace gas detection without chemical reagents, used to analyze dissolved gas compositions in transformer insulating oil.
Q2: How many types of gases and moisture can this instrument detect?
A: It measures 7 key fault characteristic gases (H₂, CH₄, C₂H₆, C₂H₄, C₂H₂, CO, CO₂), plus N₂, O₂ and trace water humidity, totally 9 components to comprehensively evaluate transformer internal operation status.
Q3: Does this DGA analyzer need regular consumables replacement?
A: No consumables required at all. It is a purely physical optical detection method without carrier gas, liquid chemicals or chromatography columns, greatly cutting long-term operation and maintenance costs for power stations.
Q4: How long is the calibration cycle of the equipment?
A: Ultra-long calibration interval ranges from more than 10 months up to several years. It only supports simple single-point user calibration, which is easy to operate without professional technicians.
Q5: What is the service life of the built-in hydrogen sensor?
A: The dedicated hydrogen sensor has a service life of more than 4 years, stable performance and low later replacement frequency.
Q6: Can I check test trends without connecting an external computer?
A: Yes. The high-resolution built-in display supports graphical & tabular data display, as well as real-time trend curve viewing for monitoring tasks. You can also export all historical data to PC via USB cable if needed.
Q7: What is the weight and size of the portable unit for field work?
A: Net weight is less than 15kg; compact overall dimensions: 484×139×440mm. It is lightweight and portable enough for on-site substation transformer inspection and mobile maintenance.
Q8: What are the advantages compared with traditional gas chromatography DGA devices?
A: This PAS model features shorter testing time, no consumables, longer calibration period, configurable response time and stable anti-interference performance. It is more suitable for frequent on-site field detection scenarios.
Q9: What environmental conditions can the instrument adapt to?
A: Operating ambient temperature: 5 ~ 50°C; storage temperature: -30 ~ 80°C; tolerates 90% non-condensing humidity. It passes strict IEC vibration and drop resistance tests, adaptable to harsh outdoor substation environments.
Q10: What power supply does the equipment support?
A: Wide universal AC input: 90-250VAC, frequency 47-63Hz, compatible with power grids worldwide.
Q11: What accuracy and repeatability can be guaranteed?
A: Measurement accuracy: ±5% reading or ±2 ppm (whichever is larger); humidity precision: ±1%RH. Repeatability is within 5% under standard reference conditions, with tiny zero and span drift.
Q12: Does the machine comply with international safety and EMC standards?
A: It fully complies with IEC, EN, UL, CSA electromagnetic compatibility and electrical safety standards, applicable to global power project bidding and export certification requirements.
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