Overview：
Transformer on-line monitoring and fault diagnosis technology is very important for improving the safety and stability of power system.Among them, on-line monitoring technology based on dissolved gas analysis in oil is the most common and the most important technology in on-line monitoring of transformers. DGA is a powerful diagnostic tool to help you understand the health and condition of power transformers and other oil-filled equipment. Analyzing the composition and content of dissolved gas in oil is one of the most effective measures to monitor the safe operation of oil-filled electrical equipment.DK-200P Portable Dissolved Gas Analyzer using photoacoustic spectroscopy to analyze dissolved gas in oil to monitor the safe operation of oil-filled electrical equipment has the characteristics of accuracy,repeatability,maintenance-free, quick response and high precision.
It has pulsed IR source and 8 distinct spectral bands in the mid-IR region defined by narrow band-pass optical filters.High sensitivity is obtained by utilizing the unique microphone technology from Gasera Ltd., Finland. High selectivity is achieved by choosing up to 8 optical filters with narrow spectral bands for target gases as well as interfering gases. Several spectral regions can be used with each gas for minimal cross-sensitivity. Analysis is based on a modified classical least squares fit of sample response to calibration data.Photoacoustic technology allows high sensitivity from short optical path length which has been further improved with novel model-based non-linear compensation. This provides linear dynamic range of over five orders of magnitude.
Features：
- No consumables
- Built in self-test
- Long calibration period
- Sub-ppm detection limits
- Up to 7gases simultaneously
- Analysis from very low gas volume
- Versatile programming of measurement tasks
- High-resolution graphical display with userfriendly menus
- Built in trend view for monitoring tasks, no external computer required
- Presentation of the measurement results of all gases both numerically and in graphical form
Technical Date：
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Measurable gases
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Gas
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Limited detection
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Range
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Hydrogen H2
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5ppm
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5,000ppm
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Methane CH4
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1ppm
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50,000ppm
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Ethane C2H6
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1ppm
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50,000ppm
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Ethylene C2H4
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1ppm
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50,000ppm
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Acetylene C2H2
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0.5ppm
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50,000ppm
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Carbon Monoxide CO
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5ppm
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50,000ppm
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Carbon Dioxide CO2
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5ppm
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50,000ppm
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Moisture H2O
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0%
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100%
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Oxytran O2
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0%
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25%
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Nitrogen N2
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0%
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80%
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Physical&Mechanical
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Ambient operating temperature
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0 - +40°C
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Operating sample temperature
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0 - +45°C
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Storage temperature
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-20°C - +70°C
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Humidity 90%
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(non-condensing @30°C)
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Power Supply
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110-240VAC@50-60Hz
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Power Consumption
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50W
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Weight
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< 10kg
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Size
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400 x 330 x 220mm
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Gas cell volume
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< 30ml
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Oil volume in extraction unit
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<=50ml
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Vibration endurance
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IEC 60068-2-6, Test Fc
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Drop/Shock
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IEC 60068-2-31 and ISTA 1A
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Measurement data
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Dynamic range
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500-50,000
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Zero drift
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± detection limit per 1 month
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Measurement repeatability
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5% of measured value in reference conditions
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Range drift
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5% of measured value per 12 month
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Accuracy
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± 5% or ± 2 ppm (whichever is greater)
±1% RH at 0-90% RH for H2O According to the specifications of the Figaro sensor for H2
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User interface
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Built in touch screen, virtual key pad
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Communication
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USB，AK
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Standards
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Low Voltage Measurement Directive 2006/95/EC and electro magnetic EMC Directive2004/108/EC EN 50270: 2006, EN 61000-3-2: 2006, EN 61000-3-3: 1995 + A1: 2001 + A2: 2005, EN 61010-1: 2001
Safety standards：
EN61010-1 (2001), IEC 61010-1 (2001), CAN/CSA-C22.2 No. 61010-1 (2004)and UL 61010-1 (2004 incl. rev. 2005)
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