Vaisala MGP261, Руководство пользователя

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2. Product Overview
2.1 Introduction to MGP261
Vaisala CARBOCAP
â
MGP261 Multigas Probe for Methane, Carbon Dioxide, and Humidity
Measurement is a compact and durable in situ probe for methane (CH
4
), carbon dioxide (CO
2
),
and moisture (H
2
O vapor) measurements in demanding biogas processing conditions. MGP261
probes are Ex certified for use in Ex Zone 0 (parts inserted into process) and Ex Zone 1 (parts
outside the process).
MGP261 can be installed directly into raw process gas, removing the need for sample
treatment. Application areas include anaerobic digestion of industrial and municipal waste and
sludge from waste water treatment, landfill gas monitoring, activated carbon filter monitoring
in biogas treatment process, and CHP engine feed gas monitoring.
The proprietary infrared technology of MGP261 provides superior stability and repeatability.
Thanks to condensation elimination through probe heating and corrosion-resistant steel and
plastic materials, the IP66-rated instrument is highly robust and durable.
MGP261 measurement output options include 3 analog current output channels (4 … 20 mA)
and Modbus RTU over RS-485. The probe also provides a 4 … 20 mA Ex ia input for connecting
an optional external pressure or temperature sensor.
For easy-to-use access to configuration, diagnostics, and calibration and adjustment
functionalities, MGP261 can be connected to Vaisala Insight PC software with a USB cable
accessory.
2.2 Basic Features and Options
• Available measurement parameters: methane (CH
4
), carbon dioxide (CO
2
), and moisture
(H
2
O vapor)
• Ex classification: Ex II 1/2 (1) G Ex eb mb [ia] IIB T3 Ga/Gb -40 °C
≤
Tamb
≤
+60 °C
• Operating pressure: -500 ... +500 mbar
• 3 analog outputs (4 … 20 mA, scalable, isolated)
• Digital output: Modbus RTU over RS-485
• Optional external temperature or pressure sensor input (4 … 20 mA, Ex ia)
• Power supply input: 18 … 30 VDC
• Direct installation into process: for pipeline ports with 1.5" female NPT thread
• Compatible with Vaisala Insight PC software
2.2.1 Hazardous Area Safety
Do not install or use MGP261 in a hazardous area before reviewing
the safety information in Using MGP261 in Hazardous Locations (page 17) .
CAUTION!
Chapter 2 – Product Overview
9