Dimensions Types Application - Automated Control
Dimensions Types Application - Automated Control
Dimensions Types Application - Automated Control
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RISONIC 2000 Transducer for Channel Type: MFATKx<br />
Ultrasonic-Flowmeasurement for Channels Order-No.: refer to table<br />
<strong>Dimensions</strong><br />
<strong>Types</strong><br />
The amount of transducers under the order number are delivered as one path set.<br />
Type Order-No. Sound path length Oscillator ∅ A Way of mounting Frequency<br />
MFATK1 00 66<br />
800.001<br />
MFATK2 00 66<br />
805.001<br />
0.75...2 m [2.4...6.6 ft] 10 mm [0.39“] Surface / Flush<br />
mounting<br />
>2...14 m [>6.6...46 ft] 16 mm [0.62“] Surface / Flush<br />
mounting<br />
1 MHz<br />
1 MHz<br />
<strong>Application</strong><br />
The RISONIC ultrasonic measurement method uses the travel time difference of ultrasonic sound pulses to<br />
determine the flow velocity of liquids in open channels. The ultrasonic pulses are sent out upstream and<br />
downstream across the flow with an the angle α between the direction of flow and the sonic path. The<br />
measurement is carried out with very little restriction of the width of the open channel and therefore causes<br />
hardly any head losses.<br />
The sensors of the type MFATKx can be used in open channels (rectangular, trapezoidal, circular) and in<br />
pressure tunnels. For installation and doing service the open channels have to be dewatered.<br />
200805 WAL/Ges Subject to changes Page 1/4<br />
Data sheet hardware<br />
DG DKap Stamm-Bez. Var Ind F Sp<br />
22.210.006680x.001.03.4.4<br />
© 2008 by Rittmeyer AG, CH-6341 Baar
RISONIC 2000 Transducer for channel<br />
MFATKx<br />
The liquid has to be transparent for ultrasonic sound, i.e. the liquid should not contain a high concentration of<br />
particles or entrained air bubbles and sediments. In addition, no stratified flows should occur. Further,<br />
temperature and/or salinity gradient, if present, should be within acceptable limits (bending of sonic path).<br />
High accuracy is guaranteed by independence of parameters such as temperature, pressure, electrical<br />
conductivity etc.<br />
Installation of the sensors: The angle α between the sonic path and direction of flow should preferably be<br />
45 °. In case of rectangular open channels an angle α between 35°...70° is admitted. Other angles are<br />
admitted depending on channel shape (and processing unit).<br />
Short description<br />
The RISONIC sensors MFATKx serve alternately as transmitter and receiver. A voltage surge excites the<br />
piezoelectric oscillator. The ultrasonic sound pulses propagate through the liquid to be measured. On the<br />
opposite side of the open channel, the sound pulses are received, converted into an electrical signal and<br />
further processed by the processing unit MFPxxx.<br />
MFATKx consists of a sphere, the transducer-housing and two covers.The necessary accessories and<br />
instructions are available for installation.<br />
The RISONIC-transducers can be installed at a maximum distance of 300 m (984 ft) from the processing unit<br />
(triaxial cable). To prevent cables from damage, protection tubing and fexible conduits are available at<br />
Rittmeyer AG.<br />
Technical Data<br />
• Protection Class<br />
IP 68 (NEMA 6) submersible<br />
• Minimum Path Length:<br />
750 mm (2.46 ft) flush mounting required<br />
• Maximum Path Length:<br />
14 m (46 ft)<br />
• Material of Sphere:<br />
PVC grey<br />
• Material of Sensor Housing: Stainless steel 1.4305 (AISI 303)<br />
• Material of Cover Stainless steel 1.4305 (AISI 303)<br />
• Max. Pressure allowed:<br />
10 bar (145 psi)<br />
• Operating Temperature:<br />
-30°C ..... +70°C (-22°F...+158°F)<br />
• Humidity:<br />
100% r.F.<br />
• Weight Transducer MFATKx<br />
4.52 kg (10 lb.) per couple of 2 units<br />
Quality Tests<br />
1. Tests of ElectromagneticCompatibility (EMC)<br />
Test IEC - Standards Severity Level<br />
Pulse withstandability test 0.01 IEC 255-5 3<br />
Dielectric strength 0.02 IEC 255-5 4<br />
Insulation resistance 0.03 IEC 255-5 3<br />
Surge, High energy pulses 2.01 4<br />
2. Climatic test<br />
Test IEC - Standard Severity Level<br />
Climatic test IEC 68-2-38<br />
200805 WAL/Ges Subject to changes Page 2/4<br />
Data sheet hardware<br />
DG DKap Stamm-Bez. Var Ind F Sp<br />
22.210.006680x.001.03.4.4<br />
© 2008 by Rittmeyer AG, CH-6341 Baar
RISONIC 2000 Transducer for channel<br />
MFATKx<br />
Notes on the correct use of ultrasonic flow measurement in open<br />
channels<br />
• The layout of the RISONIC-Measurement system has to be done according to the specifications of<br />
Rittmeyer AG.<br />
• A sensor alignment of ±1° or better under operating conditions is necessary. The survey should<br />
preferably be done with a theodolite system.<br />
• No stratified flows should occur. Temperature and/or salinity gradient, if present, should be within<br />
acceptable limits (bending of sonic path) and no considerable gas content should be in the water.<br />
• The guidelines in the assembly and setup instructions of the Transducers MFATKx are to be followed.<br />
Technical Data Triaxial cable<br />
• Electrical Impedance:<br />
75 Ω±3 Ω<br />
• Insulation Resistance:<br />
> 10 8 MΩ/m<br />
• Weight of Cable:<br />
7.7 kg/100 m (17 lb / 328 ft)<br />
• Cu-Conductor Copper, ∅ = 0.47 mm (0.0185“)<br />
• Cable: Polyethylene, black, ∅ = 7.35 mm (0.289“)<br />
• Min. Bending Radius: Single bending 40mm (1.57“)<br />
Multiple bending 75mm (2.9“)<br />
Flexible applications 150mm (5.9“)<br />
Accessories (optional)<br />
Type<br />
Order No.<br />
Triaxial cable (max. length 300 m, 984 ft) MFUZTK 04 64 980<br />
Laser for Channel Measurement MFUZKL 00 65 830.001<br />
200805 WAL/Ges Subject to changes Page 3/4<br />
Data sheet hardware<br />
DG DKap Stamm-Bez. Var Ind F Sp<br />
22.210.006680x.001.03.4.4<br />
© 2008 by Rittmeyer AG, CH-6341 Baar
RISONIC 2000 Transducer for channel<br />
MFATKx<br />
Empty page<br />
200805 WAL/Ges Subject to changes Page 4/4<br />
Data sheet hardware<br />
DG DKap Stamm-Bez. Var Ind F Sp<br />
22.210.006680x.001.03.4.4<br />
© 2008 by Rittmeyer AG, CH-6341 Baar