Clamp-On ATEX, IECEx and EAC-Ex Ultrasonic Flowmeter
RUGGED, RESISTANT, RELIABLE
For applications where harsh environmental conditions demand a more rugged instrument, the KATflow 170 provides a corrosion-resistant option as part of a fully ex-certified package. The flowmeter is intended for permanent operation in Zone 1 and 2 hazardous areas and is an economical choice for a variety of metering applications. The KATflow 170 demonstrates that even the most complex technical requirements can be met with straightforward solutions.
The KATflow 170 flowmeter is designed around a choice of explosion-proof housings available in either offshore industry compliant epoxy-coated copper-free aluminium, or stainless steel. The instrument is extremely easy to use and is programmed with a magnetic pen and a glass-fronted keypad for increased safety. The robustness and reliability of the KATflow 170 is further enhanced by its encapsulated IP 68 transducers which are manufactured from stainless steel and have a sturdy cable conduit.
THE TECHNOLOGY BEHIND THE MEASUREMENT
The KATflow non-invasive flowmeters work on the transit time ultrasonic principle. This involves sending and receiving ultrasonic pulses from a pair of sensors and examining the time difference in the signal. Katronic uses clamp-on transducers that are mounted externally on the surface of the pipe and which generate pulses that pass through the pipe wall. The flowing liquid within causes time differences in the ultrasonic signals, which are then evaluated by the flowmeter to produce an accurate flow measurement.
The key principle of the method applied is that sound waves travelling with the flow will move faster than those travelling against it. The difference in the transit time of these signals is proportional to the flow velocity of the liquid and consequently the flow rate.
Since elements such as flow profile, type of liquid and pipe material will have an effect on the measurement, the flowmeter compensates for and adapts to changes in the medium in order to provide reliable results. The instruments can be used in a variety of locations, from measurements on submarines to installations on systems destined for use in space, and on process flu ids as different as purified water in the pharmaceutical sector and toxic chemical effluent. The flowmeters will operate on various pipe materials and diameters over a range of 10 mm to 6,500 mm.
HIGHLIGHTS
SPECIFICATION
- Pipe diameter range 10 mm to 3,000 mm
- Temperature range for sensors -50 °C to +115 °C (-58 °F to +239 °F), higher temperatures available on request
- Robust IP 66 unit with LCD display and glass-fronted keypad
- Epoxy-coated aluminium or stainless steel enclosure
- Magnetic pen for safe and easy programming
- Measurement of two flows simultaneously
FEATURES
- Suitable for installation in hazardous areas
- Dual flow monitoring with sum, average, difference and maximum calculations
- IP 68 stainless steel sensors as standard
- Process output options including current, open-collector, relay
- Communication options RS 485, Modbus RTU, Profibus PA and HART* compatible output
- ATEX-certified PT100 probe for temperature compensation
ACCESSORIES
- Optional sound velocity output function
- Stainless steel bracket for either pipe or wall mounting
- KATdata+ software for data evaluation
APPLICATIONS
- Produced water measurements
- Methanol and water injection systems
- Product and interface detection systems
- Measurement of refined products
- Tanker unloading systems
- Oil blending skids
PERFORMANCE
| Measurement principle | Ultrasonic transit-time difference |
| Flow velocity range | 0.01 … 25 m/s |
| Resolution | 0.25 mm/s |
| Repeatability | 0.15 % of measured value, ±0.015 m/s |
| Accuracy | Volume flow : |
| ±1 … 3 % of measured value depending on application | |
| ±0.5 % of measured value with process calibration Flow velocity (mean): | |
| ±0.5 % of measured value | |
| Turn down ratio | 1/100 (equivalent to 0.25 … 25 m/s) |
| Measurement rate | 100 Hz (standard) |
| Response time | 1 s (standard), 90 ms (optional) |
| Damping of displayed value | 0 … 99 s (selectable by user) |
| Gaseous and solid content of liquid media | < 10 % of volume |
GENERAL
| Enclosure type | Explosion-proof field housing, pipe mounted |
| Degree of protection | IP 66 according to EN 60529 |
| Operating temperature | -20 … +60 °C (-4 … +140 °F) |
| Housing material | Copper-free aluminium, polyurethane and epoxy-coated, stainless steel (optional) |
| Protection concept | Flame-proof (d), increased safety (e) |
| Ex-certification code | I I 2G Ex de I IB T6 |
| Ex-certification number | EPS 11 ATEX 1355 X |
| Measurement channels | 1 or 2 |
| Calculation functions | Average, difference, sum, maximum (dual-channel use only) |
| Power supply | 100 … 240 V, AC 50/60 Hz |
| 9 … 36 V DC | |
| Special solutions on request | |
| Display | LCD graphic display, 128 x 64 dots, backlit |
| Dimensions | 270 (h) x 140 (w) x 280 (d) mm |
| (without cable glands and mounting support) | |
| Cable glands | Power supply: M 20 x 1.5 |
| Process inputs/outputs: 2 x M 20 x 1.5 Communication: M 20 x 1.5 | |
| Sensors: 2 x M 20 x 1.5 | |
| Weight | Approx. 4.0 kg |
| Power consumption | < 10 W |
| Operating languages | English, French, German, Dutch, Spanish, I talian, Russian, Czech, Turkish, Romanian (others on request) |
| Communication | |
| Type | RS 485 (optional), Modbus RTU (optional), HART* compatible output, Profibus PA (optional) |
| Transmitted data | Measured and totalised value, parameter set and configuration, logged data |
| Internal data logger | |
| Storage capacity | Approx. 30,000 measurements (each comprising up to 10 selectable measurement units), logger size 5 MB |
| Approx. 100,000 measurements (each comprising up to 10 selectable measurement units), logger size 16 MB | |
| Logged data | All measured and totalised values, parameter sets |
| KATdata+ software | |
| Functionality | Download of measured values/parameter sets, graphical presentation, list format, export to third party software, online transfer of measured data |
| Operating systems | Windows 8, 7, Vista, XP, NT, 2000 Linux |
| Quantity and units of measurement | |
| Volumetric flow rate | m3/h, m3/min, m3/s, l/h, l/min, l/s |
| USgal/h (US gallons per hour), USgal/min, USgal/s bbl/d (barrels per day), bbl/h, bbl/min | |
| Flow velocity | m/s, ft/s, inch/s |
| Mass flow rate | g/s, t/h, kg/h, kg/min |
| Volume | m3, l, gal (US gallons), bbl |
| Mass | g, kg, t |
| Heat flow | W, kW, MW (with heat quantity measurement option) |
| Heat quantity | J, kJ, kW/h (with heat quantity measurement option) |
| Temperature | °C (with heat quantity measurement option) |
| Process inputs (galvanically isolated) | |
| Temperature | PT100 (clamp-on sensors), three- or four-wire circuit, measurement range: -50 … +250 °C (-58 … +482 °F), resolution: 0.1 K, accuracy: ±0.2 K |
| Current | 0/4 … 20 mA active or 0/4 … 20 mA passive, U = 30 V, Ri = 50 ?, accuracy: 0.1 % of measured value |
| Process outputs (galvanically isolated) | |
| Current | 0/4 … 20 mA active/passive (RLoad < 500 ?), 16 bit resolution, U = 30 V, accuracy: 0.1 % |
| Digital open-collector | Value: 0.01 … 1000/unit, width: 1 … 990 ms, U = 24 V, I max = 4 mA |
| Digital relay | 2 x Form A SPST (NO and NC), U = 48 V, I max = 250 mA |
| Voltage | 0 … 10 V, RLoad = 1000 ? |
| Frequency | 2 Hz … 10 kHz, 24 V/4 mA |
| HART* compatible | 0/4 … 20 mA, 24 V DC, RGND = 220 ? |
FLOWMETER AND ACCESSORIES
TRANSDUCERS AND ACCESSORIES
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