RISONIC Ultrasonic Transit Time Flow Measurement For Filled/Partially Filled Pipes For Open Channels. Supply Disposal Hydraulic Power Station

Transcription

1 RISONIC 2000 Ultrasonic Transit Time Flow Measurement For Filled/Partially Filled Pipes For Open Channels Supply Disposal Hydraulic Power Station

2 F1 F2 F3 F4 F5 Conditions for Accurate Flow Measurement Accurate and Reliable Flowmeter The basic prerequisite for achieving the desired measuring accuracy is the accuracy of the flowmeter itself. Air bubbles as well as suspended solids in the water can cause problems with the flow measurement. Intelligent signal detection and processing are necessary in order that reliable measurements can be made under such conditions. Knowledge of the Hydraulic Flow Conditions Not every location along the pipe is suitable for flow measurement. The hydraulic flow conditions considerably influence the measurement result. Therefore great consideration has to be given to the selection of the measuring site. Precise Determination of Pipe Geometry and Transducer Locations Measuring accuracy is also largely influenced by the geometry of the measuring site. For accurate flow measurement, the cross-sectional area of the pipe as well as the locations of the flow transducers have to be determined precisely.

3 From Simple to Highly Demanding Flow Measurement: Rittmeyer, your experienced partner for complete solutions RISONIC 2000 The RISONIC 2000 has a highly accurate transit time measurement for determining the flow amount. Depending on the desired measurement accuracy and the hydraulic conditions, single as well as multi-path measurements can be carried out. The hydraulic disturbances caused by the protrusion of the transducers are compensated in the flow calculation. With the application of advanced methods of signal analysis (cross-correlation), a perfect signal detection is guaranteed even with a considerable amount of suspended solids in the water. Preparation for Installation Rittmeyer provides services for supporting customers in determining the best location for the measuring site selecting the optimum orientation and arrangement of the measuring paths The services range from simple recommendations up to comprehensive engineering. Installation Services Rittmeyer offers a multitude of helpful tools for self-installation of the transducers. For the highest demand in accuracy, we recommend that installation be carried out by our experienced engineers. RISONIC 2000 α

4 F1 F2 F3 F4 F5 RISONIC 2000 The Latest Generation in Ultrasonic Transit Time Flow Measurement Pipe diameter From 300 to mm (12" to 433") Transducers for various applications Channel width From 0.75 to 70 m (2.5 ft to 230 ft) Transducers for various applications Applications Hydraulic power stations Water supplies Irrigation systems Drainage systems Cooling water circuits Advantages of the multi-path ultrasonic transit time technology: High measuring accuracy Applicable for difficult hydraulic conditions No pressure loss at the measuring site Flow measurement in both directions Volume calculation No «recalibration» necessary Independent of the conductivity and temperature of the water No moving parts no maintenance necessary

5 Simple Operation User-friendly parameterisation and operation: Integrated user interface Large illuminated LC display Pull-down menu Alphanumeric keyboard Cursor keys RS-232 interface with parameterisation software for PC or Laptop F1 F2 F3 F4 F5 max. 300 m Single and Multi-path Flow Measurement From simple single path to demanding 8-path flow measurements Various path arrangements including 4- and 8-path measurement in accordance with IEC41 (ASME PTC 18)

6 Engineering In order to achieve the best measuring accuracy, the hydraulic flow conditions have to be taken into consideration. The optimum selection of measuring site and the arrangement of the measuring paths are prerequisites for successful and accurate flow measurement. Determining the Location of the Measuring Site Based on the construction plans for your plant, we support you in determining the location of the best measuring site. With critical applications, we can produce computer simulations for selecting the right location. Selecting Measuring Path Orientation and Arrangement Our engineering team determines the optimum orientation and arrangement of the measuring paths depending on the hydraulic flow conditions and the desired measuring accuracy. Simple Flow Conditions If the water flows in a long, straight pipe section without disturbance or turbulence, then a single path measuring arrangement is ideal. Single Path Measuring Arrangement Difficult Hydraulic Flow Conditions If pipe manifolds, reducers, bends, valves, pumps, etc, are located close to the flow-measuring site, then considerable turbulence can be expected. Optimum orientation and arrangement of the measuring paths is necessary in order to achieve accurate measurements under these conditions. Multi-path Measuring Arrangement Multi-path Measuring Arrangement with Crossed Paths

7 Installation Further important prerequisites for a first-class flow measurement are the accurate installation of the transducers at the theoretically defined locations, an accurate definition of the cross-sectional area of the pipe at the measuring site as well as measurement of the exact positions of the installed transducers. Self-installation of the Transducers For self-installation of the transducers, Rittmeyer has numerous helpful marking and installation tools available. Please follow the recommendations on the last, foldout page. Levelling Device Precision Installation Compensation of the Pipe Geometry Rittmeyer uses OWICS (Optimal Weighted Integration for Circular Sections), a process developed by the Swiss Federal Institute of Technology for correction of the flow calculation for non-circular pipes. For the highest demands in accuracy, Rittmeyer recommends a precision installation by our experienced engineers. To determine the geometrical variables at the measuring site, Rittmeyer uses a theodolite with integrated interferometer for distance measurement and a laser pointer accessory. Services Determining the pipe cross-sectional area Installation of the transducers Determining the installation positions of the transducers (taken into consideration for flow calculation) Parameterisation of the measuring equipment

8 Path Arrangements Filled Pipes Round Filled Pipes Rectangular 1E1P 1E2P 1E4P* 2E2P 2E4P* 2E8P* Partially Filled Pipes Round Partially Filled Pipes Rectangular 1E2P 1E4P* 2E4P* 2E8P* Open Channels Trapezoidal Open Channels Rectangular Open Channels Round Open Channels Any 1E1P 1E2P 1E3P 1E4P* 1E5P* 1E6P* 1E7P* 1E8P* * Installation by experienced Rittmeyer engineers recommended 2E2P 2E4P* 2E6P* 2E8P*

9 Ultrasonic Transducers For Filled/Partially Filled Pipes: Type MFATAxx Assembled from inside Exchangeable under pressure Minimum protrusion Oscillating frequency: 1 MHz Pipe Diameter: 0.75 up to 11.0 m Type MFATB2 Assembled in pipe Hydrodynamic profile Oscillating frequency: 1 MHz 0.75 up to 11.0 m Type MFATCxx As type MFATAxx, but assembled from outside Exchangeable under pressure Minimum protrusion Oscillating frequency: 1 MHz 0.3 up to 11.0 m Type MFATD2 As type MFATB2, but with redundant US ceramic Hydrodynamic profile Oscillating frequency: 1 MHz 0.75 up to 11.0 m For Open Channels: Type MFATKx For channel applications Particularly robust Path angle freely adjustable Hydrodynamic profile Oscillating frequency: 1 MHz Channel width: MFATK1: 0.75 up to 2 m MFATK2: >2 up to 14 m Type MFATK02 For channel applications Particularly robust Path angle freely adjustable Oscillating frequency: 200 khz 7 up to 70 m

10 Certified Technical Data Measuring accuracy Number of ultrasonic measuring paths Number of measuring sites Pipe diameter Channel width Flow velocity Distance processing unit transducers Interfaces Optional interfaces Power supply Power consumption Overvoltage protection Protection class Operating temperature range Unit dimensions (H, W, D) Weight Up to 0.5% of measured value display (dependent on the hydraulic conditions as well as the accuracy of the geometrical variables at the measuring site) 1 to 8 measuring paths in a number of different path arrangements incl. IEC 41 (ASME PTC 18) for 4- and 8-path measurements bis 11.0 m (1 to 36 ft) [for max. distance: Impurities 0.2 g/l] 0.75 bis 70 m (2.5 to 230 ft) [for max. distance: Impurities 0.2 g/l] ±20 m/s (±65 ft/s) max. 300 m (980 ft) for 1 MHz transducers max m (3'275 ft) for 200 khz transducers - 1 analogue output: 4-20 ma - 4 relays: OK, forward/reverse flow, 2 relays for impulse or limit value - RS232: Interface for parameterisation by means of PC or Laptop max. 4 slots for the following modules: - Analogue input module:2 interfaces 0-20 ma / 4-20 ma - Analogue output module:2 interfaces 4-20 ma - Digital output module:3 relays (change-over contact, 60V AC/DC, 0.5A) 115 / 230 VAC / Hz 24 / 48 VDC AC 50 VA / DC 30 W Integrated IP 65 (NEMA 4) -20 to +50 C (-4 to +122 F) 400 x 300 x 210 mm (15.7 x 11.8 x 8.3 ) 12 kg (26.5 lb) Quality System ISO 9001 Reg. No