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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：
l No consumables
l Built in self-test
l Long calibration period
l Sub-ppm detection limits
l Up to 7gases simultaneously
l Analysis from very low gas volume
l Versatile programming of measurement tasks
l High-resolution graphical display with userfriendly menus
l Built in trend view for monitoring tasks, no external computer required
l 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 |
Limited detection |
Range |
|
Hydrogen H2 |
5ppm |
5,000ppm |
|
Methane CH4 |
1ppm |
50,000ppm |
|
Ethane C2H6 |
1ppm |
50,000ppm |
|
Ethylene C2H4 |
1ppm |
50,000ppm |
|
Acetylene C2H2 |
0.5ppm |
50,000ppm |
|
Carbon Monoxide CO |
5ppm |
50,000ppm |
|
Carbon Dioxide CO2 |
5ppm |
50,000ppm |
|
Moisture H2O |
0% |
100% |
|
Oxytran O2 |
0% |
25% |
|
Nitrogen N2 |
0% |
80% |
|
|
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