GE Measurement & Control ™ DigitalFlow XMT868i Panametrics Liquid Flow Ultrasonic Transmitter The DigitalFlow XMT868i liquid flow transmitter is a complete ultrasonic flow metering system for measurement of: Applications • Hydrocarbon liquids • Liquefied natural gas (LNG) • Crude oil • Lubricating oils Features • Diesel fuel oils • Economical non-intrusive flow measurement • Solvents • Hazardous (classified) location certifications • Water and wastewater • Simple set-up and installation • Hot/chilled water • Suitable for wide range of pipe sizes and materials • Chemicals • Two-channel/two-path version available • Beverages • Other liquids Panametrics Liquid Flow Ultrasonic Wetted or Clamp-On Transducers Transmitter Ultrasonic flow transducers are classified as either wetted or non-wetted (clamp-on). Clamp-on transducers are The DigitalFlow XMT868i ultrasonic flow transmitter clamped onto the outside of the pipe and never come combines state-of-the-art flow measurement capability into contact with the process fluid. Wetted transducers with a low-cost transmitter package that can be installed are mounted into the pipe or flowcell in direct contact right at the process measurement point. The XMT868i with the process fluid. carries appropriate certification for for installation in hazardous (classified) locations commonly found in Clamp-on transducers offer maximum convenience, petrochemical and chemical processing environments. flexibility and a low installation cost compared to traditional flow metering technologies. With proper The all-digital XMT868i has no moving parts, requires installation, wetted transducers provide maximum minimal maintenance and provides long-term, drift-free accuracy (better than 0.5 percent of reading) in most operation. An onboard microprocessor provides exclusive applications. digital signal coding and correlation detection routines, automatic adjustment to changing fluid properties, and The DigitalFlow XMT868i can be used with a variety of dynamically-configured operating software to simplify wetted solutions including the PanaFlow™ system. The programming. PanaFlow meter system relies on the XMT868i as an integral component to simplify installation. A DigitalFlow Improved Programming Capability XMT868i is easily mounted to the top of a PanaFlow system and is shipped ready to install. The DigitalFlow XMT868i introduces an infrared six-button keypad to allow safe programming and diagnostics verification in your hazardous (classified) location. There is no need to open the case to use a PC to program and no need for an additional handheld programmer. Just touch the glass of the XMT868i and the IR buttons will sense your touch. If you prefer your PC interface, the DigitalFlow XMT868i maintains its RS232 capability, providing full access to the meter’s diagnostics and programming using PanaView™ software. PanaView also provides continuous logging capability. Dual-Channel Version Reduces Costs and Improves Performance The optional dual-channel/dual-path model can be user- configured for a variety of applications. It can be set up to measure flow in two separate pipes with one meter to reduce the cost-per-measurement point. To minimize the effects of flow profile distortions, flow swirl and cross flow, and for maximum accuracy, you can install the two sets of transducers on the same pipe. DigitalFlow XMT868i shown with clamp-on transducers DigitalFlow XMT868i Flow Transmitter Automatically Adjusts to Changing Uses Transit-Time Flow Measurement Fluid Properties Technique Standard in all DigitalFlow XMT868i transmitters, our unique Automatic Tracking Window™ (ATW™) feature Flowmeter transducers ensures accurate flow measurements even when fluid properties are unknown or changing. Like the seek mode on your car stereo, ATW dynamically sweeps the receiver window whenever the sound speed of the fluid changes. This powerful feature lets you measure flow when the Fluid flow fluid sound speed is unknown, is changing due to large temperature shifts, or when a new liquid starts to flow in a multiproduct pipeline. Ultrasonic signal path ATW works for both clamp-on and wetted transducer Transit-time flow measurement technique applications by searching for a reliable ultrasonic receive signal. It does this by varying the time between the transmit signal and the receive signal window until In this method, two transducers serve as both ultrasonic the receive signal is found. The tracking window auto- signal generators and receivers. When mounted on a matically sweeps through a range of time intervals based pipe, they are in acoustic communication with each other, on the minimum and maximum expected sound speeds meaning the second transducer can receive ultrasonic programmed by the user. signals transmitted by the first transducer and vice versa. The window moves (tracks) in response to changes in the In operation, each transducer functions as a transmitter, fluid sound speed. Once the optimal signal is found, ATW generating a certain number of acoustic pulses, and locks onto it until another large change in sound speed then as a receiver for an identical number of pulses. occurs. When this happens, ATW returns to the seek The time interval between transmission and reception mode until the optimal signal is found again. of the ultrasonic signals is measured in both directions. When the liquid in the pipe is not flowing, the transit-time downstream equals the transit-time upstream. When the Variable time interval liquid is flowing, the transit-time downstream is less than Transmit signal Receive signal the transit-time upstream. Time The difference between the downstream and upstream Tracking window transit times is proportional to the velocity of the flowing locked onto liquid, and its sign indicates the direction of flow. receive signal Range of tracking window ATW ensures accuracy when fluid conditions change Electronics XMT868i Specifications Flow Measurement Operation and Performance Patented Correlation Transit-Time™ mode Fluid Types Enclosures Acoustically conductive fluids, including most clean • Standard: Epoxy-coated aluminum weatherproof liquids, and many liquids with entrained solids or gas Type 4X/IP66 Class I, Divison 1, Groups B, C & D; Class bubbles. Maximum void fraction depends on transducer, II, Groups E, F & G; Class III Flameproof II 2 GD EEx d IIC interrogation carrier frequency, path length and pipe T5/T6 configuration. • Optional: Stainless steel Pipe Sizes Dimensions • Clamp-on transducers: 0.5 in to 300 in (12.7 mm to 7.6 Standard: Weight 10 lb (4.5 kg), size (h x d) 8.2 in x 6.6 in m) and larger (208 mm x 168 mm) • Wetted transducers: 1 in to 200 in (25.4 mm to 5 m) and larger Channels • Standard: One channel Pipe Wall Thickness • Optional: Two channels (for two pipes or two-path Up to 3 in (76.2 mm) averaging) Pipe Materials Display All metals and most plastics. Consult GE for concrete, Optional: two-line x 16-character backlit LCD display, composite materials, and highly corroded or lined pipes. configurable to display up to four measurement parameters in sequence Flow Accuracy (Velocity) ±0.5% of reading (achievable with process calibration) Keypad Built-in infrared, six-button keypad, for full functionality operation Typical Clamp-On Flow Accuracy (Velocity) • Pipe ID>6 in (150 mm): ±1% to 2% of reading • Pipe ID<6 in (150 mm): ±2% to 5% of reading Power Supplies • Standard: 90-260 VAC • Optional: 12 to 28 VDC, ± 5% Typical Wetted Flow Accuracy (Velocity) ±1% of reading Power Consumption Accuracy depends on pipe size, installation and whether 20W maximum measurement is one-path or two-path. Operating Temperature Repeatability -40°F to 140°F (-40°C to +60°C) ±0.1% to 0.3% of reading Storage Temperature Range (Bidirectional) –67°F to 167°F (–55°C to 75°C) –40 to 40 ft/s (–12.2 to 12.2 m/s) Standard Inputs/Outputs Rangeability (Overall) Two 0/4 to 20 mA isolated outputs, 600 S maximum load 400:1 Namur NE043 compliant Specifications assume a fully developed flow profile (typically 10 diameters upstream and 5 diameters downstream of straight pipe run) and flow velocity greater than 1 ft/s (0.3 m/s). Measurement Parameters Volumetric flow, totalized flow and flow velocity Optional Inputs/Outputs Wetted Ultrasonic Flow Transducers All analog and digital I/O are available in specific combinations. Consult GE for available option cards. Temperature Ranges • Two additional 0/4 to 20 mA isolated outputs, 1000 W • Standard: –40°F to 212°F (–40°C to 100°C) maximum load • Optional (overall range): –310°F to 1112°F (–190°C to • Two 4 to 20 mA isolated inputs, 24-VDC loop power 600°C) • Two or four isolated, three-wire RTD (temperature) inputs, –148°F to 662°F (–100°C to 350°C), 100 S Pressure Ranges platinum • Standard: 0 to 3000 psig (1 to 207 bar) • Two or four pulse or frequency outputs, optically • Optional: Higher pressures on request isolated, 3A maximum, 100 VDC maximum, 1W maximum, from DC to 10 kHz maximum • Alarm relays Materials • Standard: Stainless steel ® • Optional (for Pan-Adapta Plugs): Digital Interfaces ® ® Titanium, Hastelloy alloy, Monel alloy, duplex, CPVC, • Standard: RS232 PVDF and others • Optional: RS485 (multiuser) ® • Optional: HART protocol ® • Optional: Modbus protocol Pan-Adapta plugs allow installation and removal of ® • Optional: Foundation Fieldbus wetted transducers without interrupting the process or • Optional: OPC server emptying the pipe. • Optional: Ethernet Temperature Ranges Data Logging • Standard: –40°F to 212°F (–40°C to 100°C) • Standard: None • Optional (overall range): –310°F to 1112°F (-190°C to • Optional: Memory capacity (linear and/or circular type) 600°C) to log up to 150,000 flow data points Pressure Ranges European Compliance • Standard: 0 psig to 3000 psig (1 bar to 207 bar) System complies with EMC Directive 89/336/EEC, 73/23/ • Optional: Higher pressures on request EEC LVD (Installation Category II, Pollution Degree 2) and transducers comply with PED 97/23/EC for DN<25 Materials • Standard: Stainless steel ® • Optional (for Pan-Adapta Plugs): Clamp-On Ultrasonic Flow Transducers ® ® Titanium, Hastelloy alloy, Monel alloy, duplex, CPVC, PVDF and others Temperature Ranges • Standard: -40°F to 302°F (-40°C to 150°C) Pan-Adapta plugs allow installation and removal of • Optional: -328°F to 752°F (-200°C to 400°C) wetted transducers without interrupting the process or See specific transducer for exact temperature range. emptying the pipe. Mountings Process Connections Stainless steel chain or strap, welded or magnetic • Standard: 1 in or 3/8 in NPTM clamping fixtures • Optional: RF flanged, socket weld, fuse bond and others Area Classifications Mountings • Standard: General purpose Flanged flowcell, hot tap or cold tap • Optional: Weatherproof Type 4X/IP66 • Optional: Explosion Proof, Class I, Division 1, Groups B, Area Classifications C & D; Class II, Groups E, F & G; Class III • Standard: General purpose • Optional: Flameproof II 2 G EEx md IIC T6–T3 • Optional: Weatherproof Type 4/IP65 • Optional: Submersible • Optional: Class I, Division 1, Groups B, C & D; Class II, Groups E, F & G; Class III • Optional: Flameproof II 2 G EEx d IIC T6 • Optional: Submersible Transducer Cables • Standard: One pair of coaxial cables, type RG62 AU, or as specified for transducer type • Optional: Lengths up to 1000 ft (330 m) maximum High-Temperature and High-Pressure Ultrasonic Flow Transducers Bundle Waveguide Technology™ System transducer and holder (see BWT™ System specifications) Clamp-on extended temperature (C-ET) range transducer system Energy Measurement Calculates energy flow rate and totalized energy. Requires optional RTD or analog I/O board. Temperature Transducers Loop-powered, three-wire, platinum RTDs; clamp-on and wetted (thermo-well) types are available Accuracy ±0.15°C with wetted RTDs (matched pairs) Range -4°F to 500°F (-20C° to 260°C) The accuracy of the energy measurement is a combination of the accuracy of the associated flow and temperature measurements. 1% to 2% of reading is typical for calibrated systems. Not all extremes of parameters can be achieved simultaneously. Additional Options PanaView™ PC Interface Software The DigitalFlow XMT868i communicates with a PC ® through a serial interface and Windows operating systems. Consult the manual for details on sites, logs and other operations with a PC. Additional Options XMT868i Application Notes PanaView™ PC Interface Software in Brief The DigitalFlow XMT868i communicates with a PC Ultrasonic Flowmeter Saves Money Over Mag ® through a serial interface and Windows operating Meter systems. Consult the manual for details on sites, logs and A sewerage/wastewater facility found that installing a other operations with a PC. GE clamp-on ultrasonic flowmeter offered excellent performance and accuracy and was far less expensive than installing a new mag meter. When comparing cost 710°F (376°C) Resid Line? No Problem. of a new 30 in (750 mm) mag meter to be installed on With the DigitalFlow XMT868i combined with the Bundle their cast iron line to that of a two-path GE meter, the Wafeguide Technology System from GE, you can water treatment plant decided that the ultrasonic meter measure cryogenic fluids like LNG or the demanding was a bargain. The 30 in (750 mm) mag required the line temperatures of coker resid lines that can run hotter to be shut down for installation and major piping work than 700°F (371°C). Ultrasonic flowmeters will not cause needed to be done. It was estimated that it would take pressure drop and have no impulse lines to plug, making several days to get the meter running. The GE meter was them a great solution for difficult fluids. easily installed to existing piping without ever shutting Even though most ultrasonic manufacturers’ flowmeters down the pipe and installation was complete within a can only handle up to 500°F (260°C), GE’s BWT systems day. have been able to reach up to 1000°F (537°C). The unique design removes the piezoelectric element from the extreme temperatures by using wave guide technology. The transducer can even be swapped out under operating conditions. One customer has installed 16 units, replacing their wedge meters, and has had them operating maintenance free for more than five years. Accuracy ±0.15°C with wetted RTDs (matched pairs) Range –4°F to 500°F (–20C° to 260°C) The accuracy of the energy measurement is a combination of the accuracy of the associated flow Bundle Waveguide Technology System and temperature measurements. 1% to 2% of reading is typical for calibrated systems. Not all extremes of parameters can be achieved simultaneously. www.ge-mcs.com 920-170C © 2011 General Electric Company. All Rights Reserved. Specifications are subject to change without notice. GE is a registered trademark of General Electric Company. Other company or product names mentioned in this document may be trademarks or registered trademarks of their respective companies, which are not affiliated with GE.