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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

resistance

Relative length of a straight run, N, minimum

Summary of Contents for BUF

Page 1: ...BATTERY POWERED ULTRASONIC FLOW METER AFLOWT BUF VERSION BUF 311 OPERATION MANUAL ISO 9001 2008 ...

Page 2: ...2 Manufacturer quality management system is certified to ISO 9001 2008 URL http www aflowt com ...

Page 3: ...ter 17 2 3 1 Mounting preparation 17 2 3 2 Mounting requirements 17 2 3 3 Length requirements for straight pipe runs 18 2 3 4 Mounting the flow meter flanged type on the pipeline 18 2 3 5 Mounting the flowmeter with threaded coupling 19 2 3 6 Wiring the flow meter 19 2 3 7 Dismounting 20 2 4 Putting into operation 20 3 MAINTENANCE 21 4 CONTROLLING THE FLOW METER 22 4 1 Configuring before work 22 4...

Page 4: ...anual However this will not affect the metrological characteristics and functionality LIST OF ABBREVIATIONS CP CS DN ER LCD PC PS PEA SPS USS Primary converter Secondary measuring converter Nominal diameter Error Liquid crystal display Personal computer Pipeline section Electro acoustic converter transducer Secondary power source Ultrasonic signal NOTE Words in the text marked in bold for example ...

Page 5: ...nd reverse flows independently or calcu lating their algebraic sum with regard to flow direction Determining the current value of flow velocity and flow direction Outputting measurement results to the frequency pulse or logical output Logging of measurement data and configuration settings in the internal nonvolatile memory Displaying measurement configuration and history logged data on the built i...

Page 6: ...r operational for at least 10 years without changing the battery Normal operating conditions are as follows Ambient temperature from 15 to 35 C For frequency pulse logical outputs maximal operating frequency of no more than 8 Hz Logs are read via interface not more frequently than once a month LCD works no more than 3 min per day 1 2 3 The flow meter measures average volumetric flow rate at flow v...

Page 7: ...ithium battery 3 6V nominal voltage 1 2 8 The flow meter complies with the following standards Environmental resistance ambient air temperature range is 5 65 C relative humidity is no more than 80 at a temperature 35 C without moisture condensation Atmospheric pressure from 66 0 to 106 7 kPa Protection provided by the enclosure is IP65 IP67 on request 1 2 9 View overall dimensions and weight are g...

Page 8: ...erters PEAs and an acoustic path PEA fluid PEA 1 4 1 2 PEAs are diametrically see Fig 2 installed into the measuring section Pipeline Section PS making up together the Primary Converter CP Fig 2 Diagram showing Pipeline Section PS with PEAs installed 1 4 1 3 The CS generates electric sounding pulses which simultaneously come to PEA1 and PEA2 USS generated by one PEA is projected through the liquid...

Page 9: ...cannot be ensured The flow meter measures and displays flow rate values de pending on temperature liquid density etc however volume totalizing and logging as well as pulse transmission to the Universal Output are cancelled 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 Converte...

Page 10: ... modes is controlled via RS 485 interface 1 4 3 2 Flow meter s operating modes are set by placing removing jumpers on J1 and J2 terminals which are located on the board of Secondary Cal culation module Combinations of jumpers with regard to operating modes are specified in Table 3 means that the terminal contacts are closed by a jumper and means that the terminal contacts are opened Table 3 Mode T...

Page 11: ...e clock settings c Adjust LCD contrast and data update period d Initiate calculation of output scale factor or pulse weight for Universal output e Clear logs 1 4 3 5 ADJUSTMENT mode allows viewing and modifying all of the settings In ADJUSTMENT mode in addition to the above available in OPERATION and SERVICE mode the operator can do the following Calibrate the flow meter Enter Device s serial numb...

Page 12: ...ther communication parameters are set from a PC 1 4 5 2 M Bus interface Interface M Bus interface complies with the standard EN 60870 5 The interface allows reading of the measured and archived data Interface connections are made via two wires the polarity is not important The rate of exchange via interface M Bus is set from a PC 1 4 5 3 Universal output The flow meter is equipped with 1 galvanica...

Page 13: ...s of user specified values set for the Lower limit by flowrate and Upper limit by flowrate parameters and Maximum output frequency parameter The pulse weight is calculated from the values set for the Up limit by flowrate and Pulse width parameters The pulse width can be set in the range 1 to 500 ms In the logic mode one signal level corresponds to event or its state and the other level corresponds...

Page 14: ...1 5 2 1 PEAs alternately operate in two modes transmitter mode in which the electrical pulse signal coming from the CS is transduced into ultrasonic waves and receiver mode in which ultrasonic waves in liquid are transduced into the corresponding electrical signal 1 5 2 2 The flow meter works with built in PEAs The built in PEAs come in cylindrical case with the transmitting plane in the form of a...

Page 15: ...oduction year 1 6 2 The cap covering J1 terminal used to enable modification of calibration settings is sealed after performing calibration see Fig A 2 Appendix A 1 6 3 J2 terminal used to enable modification of flow meter s operation set tings is sealed on completing start up procedures and putting the De vice into operation 1 6 4 To protect the device from unauthorized access during transportati...

Page 16: ...ents specified in this operating documentation are based on the most typical factors af fecting flow meter performance The external factors that cannot be foreseen evaluated or tested by the manufacturer during designing may exist or appear on site In this case it is necessary to eliminate these factors or place the flow meter in other location 2 2 Safety instructions 2 2 1 The flow meter should o...

Page 17: ...The CP should not be placed at the upper point of the pipeline The recommended location if applicable is at the lower or uprising pipeline section Fig 4 Recommended locations of the CP NOTE In case of impossibility of installation of a flow meter in rec ommended places device installation in the top point of the pipeline is allowed Installation of the air valve in the point which is above is thus ...

Page 18: ...lve 2 3 3 3 In case of mounting the straightening vane into the pipeline before the measuring Pipe Section Appendix E reduction of straight pipe run length is possible at the inlet of the CP up to two times In this case the required length of the straight pipe run is defined on the base of site survey and the individual measurement technique shall be designed for this structure 2 3 4 Mounting the ...

Page 19: ...ructure to the pipeline Weld conical nozzles to the pipeline butt to butt in the same way as to weld the adaptor pipes for the wafer type flowmeters so that the nozzle axis is perpendicular to the grooved nut plane Welding works shall be conducted in accordance with the requirements given in section 2 3 4 CAUTION When replacing the simulator by the flowmeter after welding it is recommended to use ...

Page 20: ... leading to the CS Dismount the flow meter When the device is dispatched for calibration or repair the PS and emitting surfaces of built in PEAs should be cleaned off sediments residue scale etc 2 4 Putting into operation 2 4 1 Start up works shall be performed by the manufacturer or by an entity certified for performing works of this type 2 4 2 The pipeline is filled with liquid to be controlled ...

Page 21: ...the flow meter power cables or signal cables contact the Service Center or re gional dealer for the information about the device s operability 3 3 Presence of display indication means that power is applied to the flow meter the indicated information gives an idea of the flow meter s per formance The list of possible faults indicated by the flow meter is given in section 4 3 of this manual Alarm ER...

Page 22: ...der Windows 98 Me 2000 XP Vista 7 operating system To install Viewer BUF 311 program create a directory with the same name and copy BUF 311 vpr file to this directory The program does not require another installation procedure 4 1 2 Getting started Connect the serial port of a PC and RS port of the flow meter RS232 485 or USB RS232 485 adapter by a cable Activate SERVICE mode place a jumper on J2 ...

Page 23: ... and PC and check set the winter summer clock mode see Table C 1 Appendix C 4 1 3 Click on the Service tab Fig 8 displays the window that will appear Fig 8 Service window The window allows you to set USS parameters and specify operation settings for the LCD and universal outputs To activate the parameter enter the required numeric value or symbol in the corresponding field and press button ...

Page 24: ...ame 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 Fig 10 Status window 4 1 6 To read the logs go to the Data Log tab Fig 11 select log type Hourly Daily or Monthly set the required interval in Date and Time fields and press the Read button ...

Page 25: ...h connection between the networked flow meters via RS 485 interface 4 1 8 Set the flow meter to OPERATION mode remove the jumper from J2 terminal Terminal J2 should be sealed If necessary seals may be hung through the lugs located on the front and rear panels of the CS case NOTE In SERVICE and OPERATION modes the user is not al lowed to modify the parameters displayed in the USS Settings tab ...

Page 26: ...iewer 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 If X symbol is displayed in position 2 battery replacement is required 4 2 4 If X is displayed in other positions and or in case of no pulses at Uni versal output check the following Liquid is present and running through the pipeline Air is not colle...

Page 27: ...ce 5 3 The flow meters can be transported by road rail sea or air except for unsealed cargo compartments provided that the following requirements are met Flow meter is transported packed in the manufacturer s box Protection against moisture is provided Temperature is within the range of 25 to 55 C Humidity does not exceed 98 at 35 C Vibration is within the range of 10 500 Hz with maximum 0 35 mm a...

Page 28: ...ged flow meter AFLOWT BUF Table A1 Flow meter s dimensions and weight DN mm L mm Weight kg PN16 PN25 32 260 4 2 4 5 40 260 7 7 4 50 320 9 9 5 65 320 10 6 11 8 80 320 12 3 14 1 100 320 13 8 18 8 125 320 17 7 24 7 150 320 20 3 30 6 200 450 38 8 46 4 250 450 57 4 62 2 300 450 66 8 76 8 ...

Page 29: ...29 Flowmeter s dimensions and weight DN mm L mm H mm G Weight kg 32 260 68 G1 1 2B 3 8 40 260 76 G1 3 4B 6 5 50 320 87 G2 1 2B 8 2 Fig A 2 View of flow meter AFLOWT BUF with threaded coupling ...

Page 30: ... 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 SK1 the switch of operation modes Fig A 3 Measurement and Calculation board ...

Page 31: ...31 APPENDIX B Wiring diagrams Fig B 1 BUF Flow meter wiring diagram ...

Page 32: ...ctive level parameter is set to High output voltage in the logic mode and pulse amplitude in the pulse mode is within 1 7 to 3 6 V In case of no pulse or at logic Low the output voltage is no more than 0 4 V External load resistance shall be 100 kOhm as a minimum In the passive mode power from an external power source with output DC voltage to15 V can be applied Permissible value of external load ...

Page 33: ...g clear Clearing logs start Total flow reset Zero setting for volume totalizer start Menu Service Median mean Number of measurements to de termine the median value 1 21 7 Arithmetic mean Number of measurements to de termine the arithmetic mean val ue 1 50 25 Inertion time s Minimal duration of the event recorded to logs 0 255 10 Cutoff flowrate m3 h Minimal flowrate cutoff 0 000 999 000 see table1...

Page 34: ...010 200000 000 depending on flow meter s DN Conversion factor calcula tion Calculation of output conversion factor start Current fre quency value Hz Current frequency value 0 120 Corresponds to flowrate value Active level Logic high level on the output Low High Low Pulse Volume Function of the output See table C 2 any direction Parameters Pulse weight m3 pulse Pulse weight 0 000005 100 0000 depend...

Page 35: ...y to set the function for the output Frequency Pulse Logic Mode Disconnected Frequency Any direction Direct flow Reverse flow Pulse Any direction Direct flow Reverse flow Logic Reversing flow direction No ultrasonic signal Flowrate exceeds the high set point Any Error Battery low level ...

Page 36: ...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 resistance Relative length of a straight run N minimum 1 2 10 3 10 3 10 3 10 10 ...

Page 37: ...arious 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 ...

Page 38: ...re rare ly at the periphery d Holes have chamfers from the flow inlet site D internal diameter of the pipeline where the straightening vane is inserted Fig E 1 Design of type A flow straightening vane 2 To lower weight and material quantity a type B straightening vane Fig E 2 can be used it is manufactured according to the following rules a Tubes are inserted in the plate holes b Tube length is eq...

Page 39: ...5 0 129 D 0 078 D 6 0 134 D 0 225 D 7 0 156 D 0 381 D 8 0 252 D 0 9 0 255 D 0 146 D 10 0 288 D 0 288 D 11 0 396 D 0 12 0 400 D 0 151 D 4 The straightening vane is installed in the pipeline at a distance of 1 2 pipeline s DN from the last source of hydraulic resistance with respect to the flow direction When installing the straightening vane the length of a straight run before PEA is determined as ...

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