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- Page 1 BATTERY POWERED ULTRASONIC FLOW METER AFLOWT BUF VERSION BUF-311 OPERATION MANUAL ISO 9001:2008...
- Page 2 * * * Manufacturer quality management system is certified to ISO 9001:2008 * * * URL: http://www.aflowt.com...
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Page 3: Table Of Contents
TABLE OF CONTENTS Page INTRODUCTION ..................... 4 1. DESCRIPTION AND OPERATION ..............5 1.1. Application ..................... 5 1.2 Specifications ..................6 1.3. Contents of the delivery package ............7 1.4. Design and operation ................8 1.4.1. Operation principle ............... 8 1.4.2. -
Page 4: Introduction
INTRODUCTION This document covers battery powered ultrasonic flow meter "AFLOWT BUF" of BUF-311 version (the flow meter below) and con- tains the information about its operation and design. Due to continuous improvement of product policy actual flow me- ter’s specifications may differ from the data specified in this manual. -
Page 5: Description And Operation
1. DESCRIPTION AND OPERATION 1.1. Application 1.1.1. "AFLOWT BUF" battery powered ultrasonic flow meter of BUF-311 ver- sion is designed to measure average volumetric flow rate and volume of bidirectional flows of cold and hot water. The flow meters may be used as part of metering systems and au- tomatic process control systems in power industry and municipal engi- neering applications. -
Page 6: Specifications
1.2 Specifications 1.2.1. Specifications are listed in Table 1. Table 1 Parameter Value 1. Nominal diameter of the pipeline, DN 2. Minimal measured average 0.11 0.18 0.28 0.48 0.73 1.13 1.77 2.50 4.53 7.10 10.15 volumetric flow rate Q 3. Measured transient aver- age volumetric flow rate Q 0.55 1.40 2.40 3.60 5.70 8.80 12.7 22.6 35.4 50.9... -
Page 7: Contents Of The Delivery Package
3. Operating documentation: - Passport - Operation manual and dedicated software NOTE. The required items of the delivery package are specified in the order sheet. Operating documentation and order sheets for this product and other products are available on www.aflowt.com. -
Page 8: Design And Operation
1.4. Design and operation 1.4.1. Operation principle 1.4.1.1. The flow meter is designed on the base of a pulse-phase method of ul- trasonic flow measurement. Its operation principle is based on measuring the time difference between the time it takes for an ultrasonic signal (USS) to travel through the liquid with the direction of flow and against it. -
Page 9: Design
1.4.2. Design The flow meter's block diagram is shown in Fig.3. Fig.3. Flow meter's block diagram BUF-311 flow meter includes the Primary Converter and Secondary Measuring Converter. The Primary Converter (CP) is a specially designed measuring pipe section with one factory-supplied pair of PEAs installed on it. -
Page 10: Operating Modes
To provide data exchange with external devices, Measurement and Calculation board is equipped with Universal output, M-BUS output and RS-485 output (optional). graphic Liquid Crystal Display (LCD) makes visible measurement data. The LCD displays alpha-numeric data in two lines (16 characters per line). Displayed data is updated with use of the button located near the LCD on the front panel. -
Page 11: Displaying Measurement Results
d) Operation settings: - Type of signal processing (median averaging, arithmetical averaging etc) - RS-485 settings - Types of error situations. 1.4.3.4. SERVICE mode – start-up procedures. In SERVICE mode, in addition to the above, available in OPERA- TION mode, the operator can do the following (via RS-485 interface): a) View: - Configuration of measuring pipe section (device base, axis base, nomi- nal diameter) -
Page 12: External Connections
With each pressing of the button, the next parameter is indicated. When no button is pressed during the period specified in the "Service" window of Viewer BUF-311 program, the LCD goes off. 1.4.5. External connections 1.4.5.1. RS-485 interface... -
Page 13: Logging
quency value is 1000 Hz for ADJUSTMENT mode and 100 Hz for OPERATION and SERVICE modes. CAUTION! Please note that the higher the value of maximum frequency, the faster the battery is discharged. The recommended Fmax value is 8 Hz. ... -
Page 14: Design
- Time of errors – duration of error situation - Operating time – time of totalizer operation. 1.4.6.2. Modifications made on the operation mode are logged in the Operation mode log with a capacity of 100 records. Mode log format is as follows: - Order number of the record - Name of the active operation mode - Date and time of activation. -
Page 15: Marking And Sealing
1.6. Marking and sealing 1.6.1. The marking on the front panel of the CS contains: - Flow meter's name and designation - Nominal diameter - Pulse weight on the universal output - Maximal pressure - Case protection - Minimal, nominal and maximal measured average volumetric flow rate - Production year 1.6.2. -
Page 16: Operation
2. OPERATION 2.1. Operating restrictions 2.1.1. Environmental restrictions with regard to the factors affecting the performance and characteristics of the controlled medium shall comply with the requirements specified in the operating documentation. 2.1.2. For precision and reliable operation, when choosing CP mounting location, the following conditions must be met: - Liquid pressure in the pipeline and pipeline's operational characteristics must not be of values that may facilitate gas release and/or gas (air) -
Page 17: Mounting The Flow Meter
2.3. Mounting the flow meter 2.3.1. Mounting preparation 2.3.1.1. When mounting the flow meter on site, a free pipeline section should be provided. 2.3.1.2. The flow meter should be transported packed in the manufacturer’s box. After the flow meter has been moved to the mounting location from a cold environment into a warm one (with ambient temperature above zero), it shall be left to stand in the manufacturer’s box for at least 3 hours to make sure that no condensation remains inside. -
Page 18: Length Requirements For Straight Pipe Runs
Fig.5. Recommended locations of PEA pair 2.3.3. Length requirements for straight pipe runs 2.3.3.1. For proper operation of the flow meter, before the first and the last PEA with respect to the flow direction, there should be straight pipe runs of corresponding length with the DN equal to the DN of the CP. -
Page 19: Mounting The Flowmeter With Threaded Coupling
Alignment of the whole unit and flatness/parallel alignment of the flang- es for the CP to be mounted between them must be provided. 2.3.4.3. Mount the flow meter on the pipeline provided that the arrow on the CP points to the flow direction. Put rubberized asbestos fabric gaskets between the mating flanges and bolt the flanges. -
Page 20: Dismounting
a minimum from other cables. To avoid mechanical damages, it is recommended to place all cables in metal tubes or sleeves. With presence of high-level electromagnetic interference (for instance, from a thyristor controller) IT IS FORBIDDEN to lay the cables without putting them into properly grounded (neutrally earthed) metal tubes or sleeves. -
Page 21: Maintenance
3. MAINTENANCE 3.1. It is recommended to check on regular basis that: - Performance of the flow meter complies with the specifications - Operating conditions are met - No external defects are detected - Electrical and mechanical parts are reliably connected. Check periods depend on operating conditions but should not exceed 1 month. -
Page 22: Controlling The Flow Meter
(place a jumper on J2 terminal). The list of parameters to be configured on-site in SERVICE mode is given in Appendix C. Run the BUF-311.vpr file. Wait for the main window shown in Fig.6 to open. Fig.6. Main window Click on the leftmost icon in the command line of the main window. - Page 23 Fig.7. Main window after the connection with the flow meter is established This tab allows you to set new values for current date and time, establish interface connection between the device and PC, and check/set the winter/summer clock mode (see Table C.1, Appendix C). 4.1.3.
- Page 24 4.1.4. Click on the "Flow Data" tab. Fig.9 displays the corresponding window. Pressing "Start reading" button allows you to view measured parame- ters. Fig.9. "Flow Data" window 4.1.5. In the "Status" tab, on pressing the "Start reading" button, the current status of the flow meter is indicated (Fig.10).
- Page 25 Fig.11. "Data Log" window 4.1.7. If the flow meters are connected in a network, open the "Program Settinds" tab (Fig.12). Fig.12. "Program Settings" window The window options make it possible to establish connection between the networked flow meters via RS-485 interface. 4.1.8.
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Page 26: Troubleshooting
The current flow rate is above the lower threshold 4.2.2. The same information can be read via the communication interface from the Status tab of the "Viewer BUF-311" program (see section 4.1.5). 4.2.3. If "X" symbol is displayed in position 1, the flow meter shall be forwarded to the manufacturer for repair. -
Page 27: Packing, Storage And Transportation
5. PACKING, STORAGE AND TRANSPORTATION 5.1. AFLOWT BUF flow meter is packed in a separate container (corrugated carton or wooden box) 5.2. The flow meter should be kept in the manufacturer's box in. a dry heated storeroom. The storeroom should be free from current-conductive dust, acid or alkali fumes and aggressive gases. -
Page 28: Appendix A. General View
APPENDIX A. General view 1 – indicator; 2 – button; 3 – cable gland Fig.A.1. View of flanged flow meter AFLOWT BUF Table A1. Flow meter's dimensions and weight Weight, kg DN, mm L, mm PN16 PN25 10.6 11.8 12.3 14.1... - Page 29 Flowmeter's dimensions and weight G, “ DN, mm L, mm H, mm Weight, kg G1 1/2B G1 3/4B G2 1/2B Fig.A.2. View of flow meter AFLOWT BUF with threaded coupling...
- Page 30 А/Data- В/Data+ M- BUS XT4 XT3 1 – Battery; 2 – Module RS-485, XT1 – connector for RS-485 interface; XT1, XT2 – connectors for PEA connection cables, XP3 – connector for battery; XТ3 – connector for Universal output; XT4 – connector for M-BUS interface; J1, J2 – ter- minals used to set operation modes;...
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Page 31: Appendix B. Wiring Diagrams
APPENDIX B. Wiring diagrams Fig.B.1. BUF Flow meter wiring diagram... - Page 32 Fig.B.2. Universal output, circuit diagram of output stage To match output stage to inputs of different types, the output stage of universal output (Fig.B.2) is designed to work with either the internal power source (active mode) or an external power source (passive mode).
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Page 33: Appendix C. Parameters To Be Set During On-Site Configuration
APPENDIX C. Parameters to be set during on-site configuration Table C.1 Representation Value of the parame- Parameter Name, Possible after initializa- Notes measurement units values tion on PC screen Menu "System" Flow meter address in the RS- Address 1-247 interface network The speed of communication via Boudrate 1200, 2400, 4800... - Page 34 Cont. of Table C.1 Menu "Service" / Universal output Disconnected Logic Type Operation mode of the output Disconnected Pulse Frequency Frequency Flowrate Function of the output See table C.2 any direction "Parameters" Maximum out- Maximum frequency of output put frequency, 0-120 signal Error frequen-...
- Page 35 Table C.2. Possible settings for Universal output Possibility to set the function for the output Name of the parameter Pulse Frequency Logic Mode Disconnected Frequency Any direction Direct flow Reverse flow Pulse Any direction ...
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Page 36: Appendix D. Relative Length Of Straight Runs
APPENDIX D. Relative length of straight runs Table D.1 shows minimum values of relative length of pipeline straight runs for type installation depending on the types of local hydraulic resistance. Table D.1 Type of local hydraulic Relative length of a straight run, N, minimum resistance... - Page 37 Cont. of Table D.1 Control valve Control valve Not fully-open globe valve Pump Pump DN1 / DN DN1 / DN In case of various types of hydraulic resistance in the pipeline, the length of a pipeline straight run related to the resistance nearest to the PEAs should be no less than the value specified in the table, and the distance from PEAs to other hydraulic resistances should be no less than the value specified in the table for hydraulic resistance of this type.
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Page 38: Appendix E. Straightening Vane Design
APPENDIX E. Straightening vane design 1. Fig.E.1 shows the design of type A straightening vane that is manufactured according to the following rules: a) Straightening vane plate thickness is equal to the diameter of the holes; depending on material, the plate can be made of one or several sheets b) All the diameters of the holes in the plate are equal c) Holes are spread more thickly in the center of the plate, and more rare-... - Page 39 Fig.E.2. Design of type B flow straightening vane. 3. Hole marking in straightening vanes is shown in Table E.1. Table E.1. Coordinates of the holes in straightening vanes of A and B type (D – pipeline internal diameter) Item X axis Y axis 0.142D 0.283D...
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