GE Measurement & Control DigitalFlow™ DF868 Panametrics Liquid Ultrasonic Flowmeter Applications The DF868 liquid flowmeter is a complete ultrasonic flow metering system for measurement of: Features • Water and wastewater • Economical, nonintrusive flow measurement • Hot/chilled water • Hazardous (classified) location certification • Water/glycol solutions • Simple setup and installation • Refined hydrocarbons • Suitable for a wide range of pipe sizes and materials • Petroleum products • Two-channel/two-path version available • Crude oil • Energy measurement option • Lubricating oils • Large backlit LCD display • Diesel and fuel oils • Velocity, volumetric and energy flow rates • Solvents • Totalized flow and trend data • Chemicals • Other liquids Panametrics Ultrasonic Liquid Dual-LCD Display, Datalogger and a Flowmeter Wide Variety of I/O Options The DigitalFlow DF868 is a full-featured, fixed-installation Whether single-channel or dual-channel, all DF868 liquid flowmeter designed to meet all your flow metering meters feature two independent, user-programmable, and energy measurement needs. Its patented Correlation graphic LCDs, giving you simultaneous access to Transit-Time™ digital signal processing provides drift-free more data. There is complete flexibility to display any measurements in ultraclean and most "dirty" liquids. This parameter on either LCD in a variety of numerical and includes fluids with gas bubbles and entrained solids that graphic formats. Examples include numerical display have previously required Doppler-type meters. of real time flow measurements, real time flow graphs and diagnostic waveforms, and numerical/graphic display of data from the meter’s built-in 43,000 point Dual-Channel Version Reduces Costs datalogger. Up to 12 isolated 4 to 20 mA outputs, up to six hermetically sealed or standard alarm relays, and up and Improves Performance to 12 frequency/totalizer outputs can be added. The optional dual-channel/dual-path model can be user- configured for a variety of applications. It can be set up Built-In Energy Measurement to measure flow in two separate pipes with one meter Capability to reduce the cost-per-measurement point. To minimize the effects of flow profile distortions, flow swirl and cross flow, and to provide maximum accuracy, two sets of Another feature that makes the DigitalFlow DF868 meter transducers can be installed on the same pipe. such a powerful and versatile flowmeter, is the energy measurement software included in every meter. The DigitalFlow DF868, with optional RTDs and input boards, Measure Flow from Outside the Pipe extends the benefits of ultrasonic flow measurement to energy measurement. Benefits include measurement Using clamp-on flow transducers, the DigitalFlow DF868 of flow and temperature without pipe penetration, and measures flow rate through metal, plastic or even compatibility with pipes from 1 to 200 in (25.4 mm to 5 concrete-lined pipes without penetrating the pipe wall. To m) in diameter. The DigitalFlow DF868 meter measures hold clamp-on transducers in place, a variety of clamping energy flow in water and water/glycol heating and fixtures are available to accommodate different pipe cooling systems with temperatures from -4°F to 410°F sizes, transducer types and attachment methods (e.g., (-20°C to 210°C). Consult GE for use with other liquid chain, wire rope, Velcro® strap or a magnetic, bolt-on, systems. or weldable steel yoke with metal band). Our universal clamping fixture includes ruled slide tracks to simplify To ensure compatibility with existing or preferred transducer spacing for accurate flow measurements. temperature instrumentation, the DigitalFlow DF868 There’s even a special small-pipe clamping fixture with meter is available with three analog input boards. miniaturized transducers to simplify flow measurement on The analog input board provides 24 VDC loop power 0.5 to 2 inch (15 to 50 mm) lines. and two isolated 4 to 20 mA inputs for transmitters. For applications requiring direct RTDs, the RTD input board provides two isolated, three-wire RTD inputs for Wetted Transducers for Maximum temperatures from -148°F to 662°F (-100°C to 350°C). Accuracy Obstructionless wetted transducers are readily available for maximum performance. After proper installation, transit-time accuracies of better than 1 percent are achievable in most applications, matching the performance of expensive factory-calibrated meters. Measurement range is 0.1 to 40 ft/s (0.03 to 12.2 m/s) for a turndown ratio of 400 to 1 in pipes from 1 to over 200 inches in diameter. Measurement is noncontaminating, obstructionless and causes no pressure drop. The DigitalFlow DF868 is all digital so measurements don’t drift, and it doesn’t need regular maintenance since there are no moving parts to wear out or orifices to clog. Variable time The DF868 Flowmeter Uses the Transit- interval Receive Transmit Time Flow Measurement Technique signal signal The transit-time technique uses a pair of transducers, with each transducer sending and receiving coded Tracking window ultrasonic signals through the fluid. When the fluid is locked onto flowing, signal transit time in the downstream direction receive signal is shorter than in the upstream direction. The difference between these transit times is proportional to the velocity Range of tracking window of the flow. The DigitalFlow DF868 measures this time ATW ensures accuracy when fluid conditions change. difference and uses programmed pipe parameters to determine flow rate and direction. Is Built to Be Economical and Flowmeter Transducers Stay Economical To be of real value, a flowmeter must be as economical to own and operate as it is capable in the field. Using the Fluid Flow latest microcircuit and manufacturing technologies, the DigitalFlow DF868 flowmeter is built to stay in service for many years. Completely solid state, the DigitalFlow DF868 rarely wears out or needs servicing, resulting in little downtime and low maintenance costs. Ultrasonic Signal Path Transit-time flow measurement technique The DigitalFlow DF868 will continue to save money by streamlining the measurement process and trimming Automatically Adjusts to Changing labor costs. Fluid Properties Our unique Automatic Tracking Window™ (ATW™) feature, standard in all DigitalFlow DF868 meters, ensures accurate flow measurements even when fluid properties are unknown or changing. Like the seek mode on a car stereo, ATW dynamically sweeps the receiver window whenever the sound speed of the fluid changes. This powerful feature enables flow measurement when the fluid sound speed is unknown, when it is changing due to large temperature shifts, or when a new liquid starts to flow in a multiproduct pipeline. ATW works for both clamp-on and wetted transducer 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 the receive signal is found. The tracking window automatically sweeps through a range of time intervals based on the minimum and maximum expected sound speeds programmed by the user. The window moves (tracks) in response to changes in the fluid sound speed. Once the optimal signal is found, ATW locks onto it until another large change in sound speed occurs. When this happens, ATW returns to the seek mode until the optimal signal is found again. Electronics DF868 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, Division 2, Groups A,B,C&D bubbles. (Maximum void fraction depends on transducer, • Optional: Stainless steel, fiberglass, explosion-proof, interrogation carrier frequency, path length and pipe flameproof configuration.) Dimensions (Standard) Pipe Sizes Weight 11 lb (5 kg), • Using clamp-on transducers: 0.5 to 300 in Size (h x w x d) 14.24 in x 11.4 in x 5.1 in (12.7 mm to 7.6 m) and larger (362 mm x 290 mm x 130 mm) • Using wetted transducers: 1 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, Two independent software-configurable 64- x 128-pixel composite materials, and highly corroded or lined pipes. backlit LCD graphic displays Flow Accuracy (Velocity) Keypad ±0.5% of reading (achievable with process calibration) 39-key tactile feedback membrane keypad Typical Clamp-On Flow Accuracy (Velocity) Power Supplies • Pipe ID>6 in (150 mm): ±1% to 2% of reading • Standard: 100 to 130 VAC, 50/60 Hz or 200 to 265 VAC, • Pipe ID<6 in (150 mm): ±2% to 5% of reading 50/60 Hz • Optional: 12 to 28 VDC, ±5% Typical Wetted Flow Accuracy (Velocity) ±1% of reading Power Consumption 20 W maximum Accuracy depends on pipe size, installation and whether measurement is one-path or two-path. Operating Temperature -4°F to 131°F (-20°C to 55°C) Repeatability ±0.1% to 0.3% of reading Storage Temperature -67°F to 167°F (-55°C to 75°C) Range (Bidirectional) -40 to 40 ft/s (-12.2 to 12.2 m/s) Standard Inputs/Outputs Two 0/4 to 20 mA isolated outputs, 550 W maximum load Rangeability (Overall) Namur NE043 compliant 400:1 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 Clamp-On Ultrasonic Flow Transducers There are six additional slots available for any combination of the following I/O boards: Temperature Ranges • Analog outputs: Select up to three additional output • Standard: -40°F to 302°F (-40°C to 150°C) boards, each with four isolated 0/4 to 20 mA outputs, • Optional: -328°F to 752°F (-200°C to 400°C) 1000 W maximum load See specific transducer for exact temperature range. • Analog inputs: Select up to three boards of one of the following types: Mountings - Analog input board with two isolated 4 to 20 mA Stainless steel chain or strap, welded or magnetic inputs and 24 V loop power clamping fixtures - RTD input board with two isolated, three-wire, RTD inputs; span -148°F to 662°F (-100°C to 350°C); 100 W • Totalizer/frequency outputs: Select up to three totalizer/ Area Classifications frequency output boards, each with four outputs per • Standard: General purpose board, 10 kHz maximum. All boards allow software- • Optional: Weatherproof Type 4X/IP66 selectable functioning in two modes: • Optional: Explosion-proof Class I, Division 1, - Totalizer mode: Pulse per defined unit of parameter Groups B,C&D; Class II, Groups E,F&G; Class III (e.g., 1 pulse/gal) • Optional: Flameproof - Frequency mode: Pulse frequency proportional to II 2 G EEx md IIC T6-T3 magnitude of parameter (e.g., 10 Hz = 1 gpm) • Optional: Submersible • Alarm relays: Select up to two boards of one of the following types: Wetted Ultrasonic Flow Transducers - General purpose: Relay board with three Form C relays; 120 VAC, 28 VDC maximum, 5 A maximum; DC 30 W maximum, AC 60 VA Temperature Ranges - Hermetically sealed: Relay board with three • Standard: -40°F to 212°F (-40°C to 100°C) hermetically sealed Form C relays; 120 VAC, 28 VDC • Optional (overall range): -310°F to 1112°F maximum, 2 A maximum; DC 56 W maximum, AC 60 VA (-190°C to 600°C) Digital Interfaces Pressure Ranges • Standard: RS232 • Standard: 0 to 3,000 psig (1 to 207 bar) • Optional: RS485 (multiuser) • Optional: Higher pressures on request • Optional: Modbus® RTU • Optional: Modbus TCP Materials • Optional: OPC server • Standard: Stainless steel • Optional: Ethernet • Optional (for Pan-Adapta® plugs): Titanium, Hastelloy® alloy, Monel® alloy, duplex, Site Parameter Programming • Menu-driven operator interface using keypad and "soft" Pan-Adapta plugs allow installation and removal of wetted function keys transducers without interrupting the process or emptying • Storage for 10 sites the pipe. Data Logging Process Connections Memory capacity (linear and/or circular type) to log over • Standard: 1 in or 3/8 in NPTM 43,000 flow data points • Optional: RF flanged, socket weld, fuse bond and others Display Functions Mountings • Graphic display shows flow in numerical or graphic Flanged flowcell, hot tap or cold tap format • Displays logged data and diagnostics Area Classifications • Standard: General purpose European Compliance • Optional: Weatherproof Type 4/IP65 System complies with EMC Directive 89/336/EEC, 73/23/ • Optional: Explosion-proof Class I, Division 1, EEC LVD (Installation Category II, Pollution Degree 2) Groups C&D; Class II, Groups E,F&G; Class III • Optional: Flameproof ( II 2 G EEx d IIC T6) • Optional: Submersible MCerts Product Conformity Certificate Thermowell RTDs Sira MC 050061/00 for continuous water monitoring Pt 100, 1/10 DIN, 3 wire, matched pair (EU IPPC) Range • Direct RTD Input Transducer Cables - Configurable in DF868. Maximum range -100° to • Standard: One pair of coaxial cables, type RG62 AU, or 350°C (-148° to 662°F) as specified for transducer type • Integrated 4-20 mA transmitter • Optional: Lengths up to 1,000 ft (330 m) maximum - 0° to 50°C (32°F to 122°F) - 0° to 100°C (32°F to 212°F) High-Temperature and High-Pressure - -50° to 200°C (-58° to 392°F) Ultrasonic Flow Transducers Bundle Waveguide Technology™ System transducer and Accuracy holder (see BWT™ System specifications) ±0.15°C Energy Measurement Additional Options Calculates energy flow rate and totalized energy usage. Requires optional RTD or analog inputs to the DF868 with PanaView™ PC-Interface Software two temperature inputs: one for supply and one for return The DigitalFlow DF868 communicates with a PC through temperature. Typical installations use surface mount a serial interface and Windows® operating systems. RTDs with integrated 4-20 mA transmitters, but wetted Consult the manual for details on sites, logs and other RTDs with thermowells are available if more accuracy is operations with a PC. required and if the line can be shut down for installation. Surface Mount RTDs Pt 1000, 4-wire, matched pair with integrated 4-20 mA transmitters Range • 0° to 50°C (32° to 122°F) • 0° to 150°C (32° to 302°F) • Field configurable to special ranges Accuracy ±0.12°C of temperature @ 0°C Clamp-On Avoids Plugged Impulse Notes in Brief Lines GE offers clamp-on transducers for a wide variety of installations. One customer purchased the C-RS transducer with a DigitalFlow DF868 to measure flow 0.125 in on a 12 in (300 mm) crude resid stream. Previously, an Ø 0.25 in (3.175 mm) orifice plate was used for the measurement. The impulse (6.3 mm) lines for the DP transmitter were consistently getting 1/4-20 nuts for adjusting the plugged, resulting in the need for service and unreliable transducers’ flow measurements. The clamp-on system offered by GE 0.125 in alignment during (3.175 mm) installation was a preferred measurement setup because installation could be done while the unit was operating, and no additional restrictions that could cause pressure drop Clamp-In Capability were introduced. The customer saved approximately US GE offers a wide variety of ways to install transducers to $50,000 in the first year, due to reduced maintenance adapt to each piping and application situation. For large costs. buried pipes, where access to the outside of the pipe prevents using clamp-on or standard wetted transducers, GE offers clamp-in transducers. These transducers offer the unique ability to be attached to the inner wall of large pipes. With a precision laser alignment tool, the transducers, can be set up properly facing each other, so when the water fills the pipe, the transducers will work flawlessly. The clamp-on transducer is designed with a dual element head for 100% redundancy. GE is an industry leader in transducer design with extremely low failure rates. Making these transducers with two elements ensures years of operation without their ever having to be serviced. Pair of CRS transducers www.ge-mcs.com 920-001E © 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.