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Table of Contents
Summary of Contents for Tork AFLOWT BUF-311
- Page 1 BATTERY POWERED ULTRASONIC FLOW METER AFLOWT BUF VERSION BUF-311 OPERATION MANUAL...
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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 ..............8 1.4. Design and operation ..................9 1.4.1. Operation principle .................. 9 1.4.2. -
Page 4: Introduction
INTRODUCTION This document covers battery powered ultrasonic flowmeter "AFLOWT BUF" of BUF-311 version (the flowmeter below) and contains the information about its operation and design. Due to continuous improvement of product policy actual flowmeter’s specifications may differ from the data specified in this manual. How- ever, this will not affect the metrological characteristics and functional- ity. -
Page 5: Description And Operation
1. DESCRIPTION AND OPERATION 1.1. Application 1.1.1. "AFLOWT BUF" battery powered ultrasonic flowmeter of BUF-311 ver- sion is designed to measure average volumetric flow rate and volume of bidirectional flows of cold and hot water. The flowmeters 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 volumetric 0,28 0,72 1,13 flow rate Q 3. Measured transient average volumetric 1,40 3,62 5,66 12,74 flow rate Q trans 4. - Page 7 1.2.5. The flowmeter provides that the results of measurements can be output- ted to: - Universal output N1 in the form of frequency, pulse or logical signal - Universal output N2 in the form of logical signal - RS-485 interface. 1.2.6.
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Page 8: Contents Of The Delivery Package
1.3. Contents of the delivery package 1.3.1. Items of the delivery package are specified in Table 2. Table 2 Item Notes 1. Battery powered ultrasonic flowmeter BUF-311 Note 1 2. Secondary Power Source Note 2 3. USB-RS232/485 adapter Optional 4. Installation kit 5. -
Page 9: Design And Operation
1.4. Design and operation 1.4.1. Operation principle 1.4.1.1. The flowmeter is designed on the base of a pulse-phase method of ul- trasonic flow measurement. Its operation principle is based on measur- ing 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 Regarding the sounding principle, the flowmeter utilizes the method of one-time simultaneous sounding. -
Page 10: Design
1.4.1.4. The flow rate value is calculated only if the following condition is fulfilled: ≤ Q, Where Q – minimal value of the flow rate, m Q – current value of the flow rate, m The recommended value of low flow cutoff corresponds to the flowmeter's sensitivity threshold, m If Q <... -
Page 11: Operating Modes
BUF-311 flowmeter 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. Secondary Measuring Converter (CS) includes Measurement and Calculation board, which is responsible for electroacoustic sounding control, primary and secondary processing of measurement results as well as for their storing in the memory. - Page 12 1.4.3.3. OPERATION mode – flowmeter's on-site operation. In OPERATION mode, the user can view the following parameters: a) Measurement values of: volumetric flow rate, flow volume totalized for forward and reverse flow and their algebraic sum, velocity of liquid, cur- rent value of USS velocity b) Measurement data and "Mode"...
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Page 13: Displaying Measurement Results
1.4.4. Displaying measurement results 1.4.4.1. List of displayed parameters is given in Table 4. Table 4 Number of displayed Units symbols Displayed Parameter (format) Integer Fract. part part Time Current date XX.XX.XX Data Current date XX:XX:XX Current value of volumetric flow rate with regard to flow l/min direction... - Page 14 1.4.5.2. Universal outputs The flowmeter is equipped with 2 galvanically connected outputs. Universal output N1 can operate in the frequency, pulse and logical modes. Universal output N2 works in the logical mode only. Diagrams of output stages and description of their operation are given in Fig.
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Page 15: Logging
Programmatically this means: " Active level ", i.e. " Low " or " High " signal level is set when the event is present. Electrical parameters of corresponding signal levels are specified in Appendix B. Universal output N2 has identical parameters and works in the same way as Universal output N1 in the logical mode. -
Page 16: Marking And Sealing
The built-in PEAs come in cylindrical case with the transmitting plane in the form of a disk in the flat end. The built-in PEAs are mounted onto the Measuring pipe section so that the transmitting (radi- ating) plane contacts the medium. Pipeline-PEA contact surface is sealed. -
Page 17: Operation
2. OPERATION 2.1. Operating restrictions 2.1.1. Environmental restrictions with regard to the factors affecting the per- formance 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 loca- tion, 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 18: Mounting The Flowmeter
- Remove the flowmeter's components from the pipeline until pressure in the pipeline section worked on is fully released - Use defective electronic devices and electric tools or use them without proper grounding (neutral earthing). 2.3. Mounting the flowmeter 2.3.1. Mounting preparation 2.3.1.1. -
Page 19: Length Requirements For Straight Pipe Runs
Fig. 4. Recommended locations of PEA pair 2.3.3. Length requirements for straight pipe runs 2.3.3.1. For proper operation of the flowmeter, 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 20: Mounting The Flowmeter On The Pipeline
survey, and the individual measurement technique shall be designed for this structure. 2.3.4. Mounting the flowmeter on the pipeline 2.3.4.1. Before working on the pipeline at the CP mounting location, fix the pipe sections that may tip out of their axes after cutting the pipeline. CAUTION! Before mounting the flowmeter, it is necessary to cut off liquid flow in the pipeline section where the flowmeter will be installed, make sure that pressure is released and drain the liq-... -
Page 21: Dismounting
2.3.6.2. SPS mounting location is determined with regard to the following con- siderations: - Length of input and output cables - SPS must be protected from condensate or liquid fallen from the pipes running nearby - SPS must not be placed in rooms where temperature may fall outside the range +5 to +50 °C and relative humidity may exceed 80 % at a temperature below +35 °... -
Page 22: Maintenance
3. MAINTENANCE 3.1. It is recommended to check on regular basis that: - Performance of the flowmeter complies with the specifications - Operating conditions are met - Power supply characteristics are within the required ranges - No external defects are detected - Electrical and mechanical parts are reliably connected. -
Page 23: Controlling The Flowmeter
4. CONTROLLING THE FLOWMETER The flowmeter is controlled from a PC running "Viewer BUF-311" program. The program is available free of charge. The interface includes several tabs classified by their function. Con- tents of the tabs is determined by the flowmeter's operation mode. After the flowmeter is powered up, the operation mode is detected automati- cally. - Page 24 Fig. 6. Main window after the connection with the flowmeter is established This tab allows you to set new values for current date and time, es- tablish 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 25 Fig. 8. "Flow Data" window 4.1.5. In the " Status " tab, on pressing the " Start " button, the current status of the flowmeter is indicated (Fig.9). Fig. 9. "Status" window 4.1.6. To read the logs, go to the " Data Log " tab (Fig.10), select log type ( Hourly , Daily or Monthly ), set the required interval in "...
- Page 26 Fig. 10. "Data Log" window 4.1.7. If the flowmeters are connected in a network, open the " Program Set " tab (Fig.11). Fig. 11. "Program Set" window The window options make it possible to establish connection between the networked flowmeters via RS-485 interface. 4.1.8.
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Page 27: Operation Procedure
4.2. Operation procedure 4.2.1. After putting into operation, the flowmeter works in the automatic mode. Current values of measured parameters are read either via the flow- meter's LCD or via RS-485 interface. 4.2.2. If the Charger/Power Supply unit is connected, the flowmeter remains operational in case of external power failure, since it switches to the in- ternal power supply (from the accumulator). -
Page 28: Troubleshooting
value, the accumulator switches off, thereby preventing a full discharge and further failure of the accumulator. 4.2.7. The LCD of the externally powered flowmeter has a backlight. In case of external power failure and switching to the internal power supply mode, the display backlight goes off. -
Page 29: Packing, Storage And Transportation
5. PACKING, STORAGE AND TRANSPORTATION 5.1. The flowmeter is transported packed according to Table 2 (operating documentation included) in the package of CU-2 packaging category (per National Standard (GOST) 23170-78). 5.2. The flowmeter should be kept in the manufacturer's box in accordance with the requirements of GOST 15150-69, Group 1. -
Page 30: Appendix A. General View
APPENDIX A. General view 1 – indicator; 2 – button; 3 – cable gland Fig. A.1. Flowmeter BUF-311 Table A1. Flowmeter's net weight Nominal diameter, mm Weight, kg... - Page 31 XT1, XT2 – connectors for PEA connection cables, XT3 – RS-485 connector; XP2 – connector for DC 24V Charger / Power Supply unit (if applicable); XP6, XP7 – connec- tors for Universal outputs N1 and N2 respectively; J1, J2 – terminals used to set operation modes;...
- Page 32 1 – power source; 2 – bracket for 35/7.5 DIN rack mounting; 3 – terminal block for connection to mains ( 220 V, 50 Hz); 4 – Secondary Power Source indicator; 5 – terminal block for DC 24 V output voltage. * - reference dimension Fig.
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Page 33: Appendix B. Wiring Diagrams
APPENDIX B. Wiring diagrams Fig. B.1. BUF-311 Flowmeter wiring diagram... - Page 34 Fig. B.2. Universal outputs, circuit diagram of output stages To match output stages to inputs of different types, the output stag- es of universal outputs (Fig.B.2) are designed to work with either the in- ternal power source (active mode) or an external power source (passive mode).
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Page 35: Appendix C. Parameters To Be Set During On-Site Configuration
APPENDIX C. Parameters to be set during on-site con- figuration Table C.1 Representation Value of the parame- Parameter Name, Possible after initializa- Notes measurement units values tion on PC screen Menu "System" Flowmeter address in the RS- Address 1-247 interface network Response lag in the RS-interface Delay, ms 0-125... - Page 36 Cont. of Table C.1 Menu "Service" / Universal outputs Universal output 1 Disconnected Logic Type Operation mode of the output Disconnected Pulse Frequency Frequency Flowrate Function of the output See table C.2 any direction "Output function" Maximum out- Maximum frequency of output put frequency, 0-120 signal...
- Page 37 Table C.2. Possible settings for Universal output N1 Possibility to set the function Name for the output of the parameter Pulse Logic Frequency × × × Disconnected × Any direction × Direct flow × Reverse flow × Any direction × Direct flow ×...
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Page 38: 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 hy- draulic resistance. Table D.1 Type of local hydraulic Relative length of a straight run, N, minimum resistance... - Page 39 Cont. of Table D.1 Control valve Control valve 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 40: Appendix E. Straightening Vane Design
APPENDIX E. Straightening vane design 1. Fig.E.1 shows the design of type A straightening vane that is manufac- tured 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 41 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 0.142⋅D...