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DigitalFlow XGM868i - Gas Flow Ultrasonic Transmitter

DigitalFlow XGM868i - Gas Flow Ultrasonic Transmitter

 

The XGM868i gas flow transmitter is a low-cost, transmitter-based version of the GM868 general-purpose gas flow meter. Like the GM868 flow meter, the XGM868i transmitter uses the ultrasonic transit-time technique for measuring gas flow. It measures flow in virtually every gas in any pipe or duct size from 1 to 120 in (2.5 cm to 3 m) and larger.

 

The transmitter is weatherproof and approved for use in hazardous areas. The wetted transducer designs offer low pressure drop, low maintenance, and accurate measurement over a wide range of flows and compositions.

DigitalFlow XGM868i Specification

  • General-purpose gas flowmeter
  • Velocity range: 0.1 to 150 ft/s (0.03 to 46 m/s)
  • Obstructionless; no pressure drop
  • No moving parts; maintenance-free
  • Tolerates dirty flow streams

The DigitalFlow XGM868i gas fl ow transmitter is a complete ultrasonic fl ow metering system for measurement of most gases including:
  • Hydrocarbon gases
  • Vent gases
  • Biogases
  • Digester gases
  • Fuel gases
  • Waste gases
  • Incinerator air fl ow
  • Vapor recovery
  • Stack gases
  • Other gases
Fluid Types Acoustically conductive gases
Pipe Sizes 2 to 120 in. NB (50 to 3,000 mm) and larger
Pipe Materials All metals. Consult GE for other materials.
Flow Accuracy (Velocity) ±1% to 2% of reading typical
Accuracy depends on pipe size and whether measurement is one-path or two-path. Accuracy to ±0.5% of reading may be achievable with process calibration.
Repeatability ±0.2% to 0.5% of reading
Range (Bidirectional) –150 ft/s to 150 ft/s (–46 m/s to 46 m/s)
Rangeability (Overall) 150:1
Specifications assume a fully developed flow profile (typically 20 diameters upstream and 10 diameters downstream of straight pipe run) and flow velocity greater than 3 ft/s (1 m/s).
Measurement Parameters Mass flow, standard and actual flow, totalized flow, and flow velocity

Electronics

Flow Measurement Transit time
Enclosures
  • Standard: Epoxy-coated aluminum Type 4X/IP66 Class I, Division 1, Groups B,C&D Flameproof ISSeP
    02ATEX008 II 2 GD EEx d IIC T5 IP66 T95°C
  • Optional: Stainless steel
Dimensions (h x d) Standard: Size 8.2 in x 6.6 in (208 mm x 168 mm), weight 10 lb (4.5 kg)
Channels
  • Standard: One channel
  • Optional: Two channels (for two pipes or two-path averaging)
Display Optional: 2 line x 16 character backlit LCD display, confi gurable to display up to four measurement parameters in sequence
Keypad Built-in infrared, six-button keypad for full functionality operation
Power Supplies
  • Standard: 90-260 VAC
  • Optional: 12 to 28 VDC, ±5%
Power Consumption 20 W maximum
Operating Temperature –40°F to 140°F (–40°C to 60°C)
Storage Temperature –67F° to 167°F (–55°C to 75°C)
Standard Inputs/Outputs Two 0/4 to 20 mA isolated outputs, 600 Ω maximum load
Optional Inputs/Outputs All analog and digital I/O are available in specifi c combinations. Consult GE for available option cards.
  • Two additional 0/4 to 20 mA isolated outputs, 1000 Ω maximum load
  • Two 4 to 20 mA isolated inputs, 24 VDC loop power
  • Two or four isolated, three-wire RTD (temperature) inputs, –148°F to 662°F (–100°C to 350°C), 100 Ω platinum
  • Two or four pulse or frequency outputs, optically isolated, 3 A maximum, 100 VDC maximum, 1 W maximum, from DC to 10 KHz maximum
  • Alarm relays: – Two or four Form C relays; 120 VAC, 28 VDC maximum, 5 A maximum; DC 30 W maximum, AC 60 VA maximum
Digital Interfaces
  • Standard: RS232
  • Optional: RS485 (multiuser)
  • Optional: Modbus® RS485 or TCP protocol
  • Optional: Ethernet
  • Optional: OPC server
  • Optional: Foundation Fieldbus®
Data Logging
  • Standard: None
  • Optional: Memory capacity (linear and/or circular type) to log over 150,000 fl ow data points
European Compliance System complies with EMC Directive 89/336/EEC, 73/23/ EEC LVD (Installation Category II, Pollution Degree 2) and transducers comply with PED 97/23/EC for DN<25
Temperature Range Standard: –58°F to 302°F (–50C° to 150°C) • Optional (overall): –310°F to 842°F (–190°C to 450°C)
Pressure Range
  • Standard: 0 psig to 2700 psig (1 bar to 187 bar)
  • Optional: 3480 psig (240 bar) maximum
Materials
  • Standard: Titanium
  • Optional: Monel® or Hastelloy® alloys
Process Connections Flanged and compression fi ttings
Mountings Flowcell or cold tap
Area Classif cations
  • Standard: General purpose
  • Optional: Weatherproof Type 4X/IP66
  • Optional: Explosion-proof Class I, Division 1, Groups B,C,&D
  • Optional: Flameproof II 2 GD EEx d IIC T6
Transducers and fl owcells for specifi c applications are available. Consult GE for details.
Transducer Cables
  • Standard: One pair of coaxial cables, type RG62 AU, or as specifi ed for transducer type
  • Optional: Lengths up to 1000 ft (330 m) maximum
High-Temperature and High-Pressure
Ultrasonic Flow Transducers
Bundle Waveguide Technology™ (BWT) System transducer and holder (see BWT System specifi cations) are available.

Descriptions English Français Deutsch Italiano Português Español
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DigitalFlow™ XGM868 Trasmettitore ultrasonico di flusso di gas Panametrics DigitalFlow™ XGM868 Trasmettitore ultrasonico di flusso di gas Panametrics DigitalFlow™ XGM868 Trasmettitore ultrasonico di flusso di gas Panametrics
Flare Gas Measurement Flow Meters Brochure (Middle East Version) Flare Gas Measurement Flow Meters Brochure (Middle East Version)
Flare Gas Measurement Flow Meters Brochure(EU Version) Flare Gas Measurement Flow Meters Brochure(EU Version) Flare Gas Measurement Flow Meters Brochure(EU Version)
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User's Guide User\'s Guide
XGM868i Brochure XGM868i Brochure XGM868i Brochure XGM868i Brochure
XGM868i Dual Channel AC Power Wiring Diagram XGM868i Dual Channel AC Power Wiring Diagram
XGM868i Dual Channel DC Power Wiring Diagram XGM868i Dual Channel DC Power Wiring Diagram
XGM868i Operating Manual XGM868i Operating Manual
XGM868i Outline and Installation XGM868i Outline and Installation
XGM868i Right Angle Bracket Outline and Installation XGM868i Right Angle Bracket Outline and Installation
XGM868i Service Operating Manual XGM868i Service Operating Manual
XGM868i Single Channel AC Power Wiring Diagram XGM868i Single Channel AC Power Wiring Diagram
XGM868i Single Channel DC Power Wiring Diagram XGM868i Single Channel DC Power Wiring Diagram
XGM868i Startup Guide XGM868i Startup Guide

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