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DigitalFlow CTF878 - Clamp-On Ultrasonic Gas Flow Meter

DigitalFlow CTF878 - Ultrasonic Clamp-on Gas Flow Meter

 

The GE Panametrics DigitalFlow™ CTF878 brings clamp-on ultrasonic gas flow metering capability to atmospheric pressure applications at velocities up to 150 ft/s (46m/s). The new CTF878 uses the correlation tag ultrasonic flow measurement technique to measure accurately and reliably the flow of natural gas, compressed air, inert gas or any other gases.

 

The CTF878 flow meter is especially useful for metering of erosive, corrosive, toxic, high-purity or sterile gases, or in any application where penetrating the pipe wall is undesirable. Since no tapping or cutting of the pipe wall is required, permanent installation costs are significantly reduced.

 

The flow meter has no wetted or moving parts, requires no maintenance, causes no pressure drop and has very wide rangeability.

DigitalFlow CTF878 Downloads

  • Noninvasive clamp-on transducers
  • No pressure drop
  • Temperatures up to 130 degrees C
  • Velocity, volumetric, totalized actual and standard flow
  • 6- to 30-inch pipe size capability
  • Simple installation

The DigitalFlow CTF878 clamp-on gas flowmeter is a complete ultrasonic flow metering system for measurement of most gases, including:

  • Natural gas
  • Compressed air
  • Fuel gases
  • Corrosive gases
  • Toxic gases
  • High-purity gases
  • Air separation gases
  • Specialty gases

 

Fluid Types All acoustically conductive gases. Minimum gas density: 0.074 lb/ft3 (1.2 kg/m3). Gas should not be wet or saturated with moisture.
Pipe Sizes 6 in to 30 in NB ANSI (152 mm to 762 mmDN)
Pipe-Wall Thickness Up to Sch 80
Pipe Materials Most metals and plastics. No lined pipes.
Flow Accuracy (Velocity) ±2% of reading at 3.5 to 150 ft/s (1.1 to 46 m/s) typical
Repeatability ±0.2% to 0.6% at 3.5 to 150 ft/s (1.1 to 46 m/s)
Range (Bidirectional) ±150 to ±3.5 ft/s (±46 to ±1.1 m/s)
Rangeability (Overall) 43:1
Specifications assume a fully developed flow profile (typically 20 diameters upstream and 10 diameters downstream of straight pipe run).
Gas Type and Minimum Pressure Dry air, oxygen, nitrogen or argon 14.5 psia (1 bara) sweet natural gas 25 psia (1.7 bara)
Measurement Parameters Velocity, actual and standard volumetric flow, and totalized flow

Electronics

Flow Measurement Correlation tag technique
Enclosures
  • Standard: Epoxy-coated aluminum
  • Weatherproof: Type 4X/IP66
  • Optional: Stainless steel
  • C-US Class I, Division 2, Groups A,B,C&D (pending)
Dimensions Standard: Weight 11 lb (5 kg), size (h x w x d) 14.24 in x 11.4 in x 5.12 in (362 mm x 290 mm x 130 mm)
Channel Single channel
Display 240 x 200 pixel backlit LCD graphic display
Keypad 24 key rubberized tactile membrane
Power Supply Standard: 85 to 264 VAC, 50/60 Hz
Operating Temperature –14°F to 131°F (–10°C to 55°C)
Storage Temperature –40°F to 158°F (–40°C to 70°C)
Standard Inputs/Outputs Two 0/4 to 20 mA isolated outputs, 550 S maximum load
Optional Inputs/Outputs There are six additional slots available for any combination of the following I/O boards:
  • Analog outputs: Select additional output boards, with four isolated 0/4 to 20 mA outputs, 1 kS maximum load
  • Analog inputs: Select one of the following types: –Analog input board with two isolated 4 to 20 mA inputs and 24 V loop power –RTD input board with two isolated, three-wire RTD inputs; span –148°F to 662°F (–100°C to 350°C); 100 S Pt
  • Totalizer/frequency outputs: Select output boards, with four outputs, software-selectable functioning in two modes: –Totalizer mode: Pulse per defined unit of parameter (e.g., 1 pulse/ft3) –Frequency mode: Pulse frequency proportional to magnitude of parameter (e.g., 10 Hz = 1 ft3/h) 10 kHz maximum • Alarm relays: Select one of the following types: –General purpose: Relay board with three Form C relays –Hermetically sealed: Relay board with three hermetically sealed Form C relays
Digital Interfaces • Standard: RS232 • Optional: RS485 (multiuser)
Data Logging Memory capacity (linear and/or circular type) to log over 6,900 flow data points
Display Functions • Graphic display shows flow in numerical or graphic format • Displays logged data and diagnostics
European Compliance Complies with EMC Directive 89/336/EEC, 73/23/EEC LVD (Installation Category II, Pollution Degree 2)

Clamp-On Transducers

Temperature Range –40°F to 266°F (–40°C to 130°C)
Area Classifications II 2 GD EEx md IIC T6 -40°F to 167°F (–40°C to 75°C), Kema 02ATEX2337X; C-US Class I, Division 1, Groups B,C,&D
Receiver Transducer Preamplifier Operating and storage temperature: -40°F to 167°F (–40°C to 75°C)
Clamping Fixture Materials Anodized aluminum or stainless steel clamping fixture with rigid rail and strap
Clamping Fixture Size and Type
  • 6 in to 8 in (150 mm to 200 mm) pipe: CFT-V8
  • 8 in to 12 in (200 mm to 300 mm) pipe: CFT-V12
  • 12 in to 30 in (300 mm to 762 mm) pipe: CFT-PI
PanaView™ PC-Interface Software The DigitalFlow CTF878 communicates with a PC through the infrared interface and Windows® operating systems. Consult the manual for details on sites, logs and other operations with a PC.
Transducer Cable
  • Standard: Two pair of coaxial cables, type RG62 AU
  • Optional: Lengths up to 500 ft (150 m) maximum
Pressure and Temperature Transmitters Available on request

Descriptions English Italiano Português Russian
CTF878 Outline & Installation Drawing CTF878 Outline & Installation Drawing
CTF878 Tag Flowmeter CTF878 Tag Flowmeter
CTF878 Tag Flowmeter Programming CTF878 Tag Flowmeter Programming
CTF878 Tag Flowmeter Service Operating Manual CTF878 Tag Flowmeter Service Operating Manual
CTF878 Wiring Diagram CTF878 Wiring Diagram
DigitalFlow CTF878 Panametrics Correlation Tag Clamp-On Gas Ultrasonic Flowmeter DigitalFlow CTF878 Panametrics Correlation Tag Clamp-On Gas Ultrasonic Flowmeter DigitalFlow CTF878 Panametrics Correlation Tag Clamp-On Gas Ultrasonic Flowmeter DigitalFlow CTF878 Panametrics Correlation Tag Clamp-On Gas Ultrasonic Flowmeter
DigitalFlow™ CTF878 Medidor ultrassônico de vazão de gás pelo princípio de correlação cruzada da Panametrics DigitalFlow™ CTF878 Medidor ultrassônico de vazão de gás pelo princípio de correlação cruzada da Panametrics

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