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13

PREPARING FOR MEASUREMENT

The following section elaborates on essential aspects that must be taken into account for successful 

flowrate measurements.

STRAIGHT RUN REQUIREMENTS

The selection of the mounting location has a significant impact on measurement quality. The 

charge and discharge areas listed in the following table should be taken into account.

FIGURE 22: 

Straight run requirements

Содержание QME05

Страница 1: ...3 Measuring Principle 3 QStar Fixed UFM and Components 4 QStar Portable UFM and Components 8 Operating 10 Getting Started 10 Preparing for Measurement 13 Measuring with UFM 15 Setup Parameters 15 Mea...

Страница 2: ...ive with Owner s Manual Ultrasonic coupling grease Other ultrasonic transducers for smaller or larger pipe dimensions as well as clamp on temperature sen sors are available on separate order Contact G...

Страница 3: ...ve the measuring data to the internal SD card read the data via USB port and export this data using Microsoft office software such as Excel Portable UFM only The device is equipped with an electricall...

Страница 4: ...usesasophisticatedcross correlation to detect signals This ensures a reliable detection of signals even in case of harsh circumstances like gas and or particle load FIGURE 2 UFM with Mounted Ultrasoni...

Страница 5: ...pply the ultrasonic coupling gel between the ultra sonic transducer and the piping in order to optimize signal input QMF PT100 Temperature sensors The clamp on temperature sensors collect tem perature...

Страница 6: ...d to submit measurement data like flow thermal output and velocity to the Programmable Logic Controller PLC Theseoutputsareinactivemode supply voltage provided internally by flow transmitter 5 USB Int...

Страница 7: ...N2 Connection of downstream transducer path2 Red wire to be connected to Black wire to be connected to RS485 Optional Interface board QMF PT100 Connect temperature sensors measuring colder temperature...

Страница 8: ...inches Operating temperatures 40 F to 300 F Ultrasonic transducer QMP F10 1 MHz BLUE housing Pipe diam eters 1 5 to 16 inches Operating temperatures 40 F to 300 F Ultrasonic transducer QMP F05 0 5 MH...

Страница 9: ...ess to the integrated SD memory card from a PC This card is used to store data logginginformationandmeasurementdata LOG files Windows XP or later versions detect the internal SD Card as mass storage m...

Страница 10: ...ical stresssuchasimpactandvibration Alwayssafeguard the transducers against strong vibration or impact to avoid damage or destruction The plug in power supply is suitable for in door use only The plug...

Страница 11: ...on the power The Flow 1 measuring window provides an overview of all data that is necessary for flow and optional heat measurements 1 Select Setup 2 Select COMPL Setup when window appears You are now...

Страница 12: ...ter while the battery is charged The empty battery needs a charging time of approximately five hours Full The battery is in a charged state The device may be operated for approximately five hours when...

Страница 13: ...taken into account for successful flowrate measurements STRAIGHT RUN REQUIREMENTS The selection of the mounting location has a significant impact on measurement quality The charge and discharge areas...

Страница 14: ...culated from the inner diameter setup user setting If there is sedimentation in the pipe which decreases the real inner diameter a small amount of uncertainty may result The same hap pens when the inn...

Страница 15: ...urement QUICKSETUP TheQuickSetupguideoffersstep by step instructions on the essential tasks required to setup parameters COMPL SETUP The complete setup function enables access to all options and exper...

Страница 16: ...ndow Flow 1 Select Setup Quick Setup Enter the kinematic viscosity of the fluid Specify whether to enter the pipe circumference or outer diameter Enter the outer diameter Enter the pipe s wall thickne...

Страница 17: ...OR 5 Choose pipe material Does the pipe have a lining YES NO YES Enter the thickness of the lining NO Select the database or user input if a material is not listed in the database USING QUICK SETUP C...

Страница 18: ...18 5 Select the fluid Choose lining material from the database Enter speed of sound of user defined coating OR OR Enter the kinematic viscosity of the medium USING QUICK SETUP CONTINUED...

Страница 19: ...efer to section QStar UFM and Components i For information on suitable transducers for specific pipe dimensions refer to section QStar UFM and Components Output of the distance between the ultrasonic...

Страница 20: ...mode positionthetransducersconvenientlyusingthespacerbar V mode and W mode FIGURE 28 Mounting of ultrasonic transducers V mode V t1 t2 Ultrasonic Transducer Mounting Distance FIGURE 29 V Mode or W Mod...

Страница 21: ...on the spacer bar using the knurled screws FIGURE 36 Using spacer bar bar index holes numbering Example number of holes 4 FIGURE 33 Z mode installation with fabric reinforced tensioning tapes for lar...

Страница 22: ...lt is suited for max 16 If using the same transducer for smaller pipes shorten the belts The belts are fastened by a tightener Figure 37 which can be tightened by using a screwdriver Figure 38 FIGURE...

Страница 23: ...metal sheath The transducer is secured by means of a knurled screw that is passed through the transducer support This support can be shifted in axial direction arrow with the help of the knurled scre...

Страница 24: ...the transducers while keepingthemunderslighttension Attachtheultrasonic transducers to the pipe by adjusting the knurled screw A untilthetransducerispressedslightlyontothepipe Transducers The mounting...

Страница 25: ...second line is to be drawn mounting position for face of the second transducer FIGURE 51 Measure Required Distance Given by Flow Transmitter FIGURE 52 Set Up the Template to Mark the Mounting Positio...

Страница 26: ...ting of Transducers in Z mode EDIT PARAMETERS Edit system parameters using the complete setup menu However this method is less convenient as it does not offer a step by step guide to setting up the pa...

Страница 27: ...outer diameter Enter outer circumference Pipe material from database Enter thickness of coating Does pipe have internal coating Material of coating Choose from database Enter customized coating Enter...

Страница 28: ...ference Enter kinematic viscosity Enter heat capacity Enter density Enter speed of sound of user defined fluid Select from database 1 Water 20 Degrees 2 OR TRANSDUCER SETUP Choose transducer Choose mo...

Страница 29: ...dows to determine whether or not the flowrate is going down Do not perform a zero calibrationuntilasettledvalueisoutputtotheflowdisplay A stop valve is not available at all positions of the piping The...

Страница 30: ...differential temperatureofbothsensors T_hot T_cold Theproduct defines thermal output Q in W units Calculating heat quantity The heat quantity is derived as a function of thermal output over time INSTA...

Страница 31: ...Enter the absolute setpoint for T1 Caution The setpoint is an absolute value and not an offset in terms of the tem perature displayed You can select RESET to delete the setpoint for the PT100 T1 In th...

Страница 32: ...ow 2 provides concise information that is important for flow measurements without heat measurement The window also provides additional flow velocity data ADDITIONAL CONTENT OF MENU FLOW 2 FUNCTION DES...

Страница 33: ...ing window Flow 1 Select SETUP CMPLSETUP Navigate to Units Setup in the main menu and then select Total Flow Select the physical unit SELECTING THE PHYSICAL UNIT FOR THERMAL OUTPUT To access the physi...

Страница 34: ...UTION The outputs of QStar UFM are working in active mode in factory state That means that the flow transmitter provides the required voltage to run the outputs Theinputsoftheexternaldeviceareconnecte...

Страница 35: ...h This means that a value of 20 mAwill also be output for flowrates higher than 100 m3 h SETUP RELAY PARAMETERS QStar UFM is equipped with a relay output This output can be assigned a function or a r...

Страница 36: ...nimum activation point must have the parameters setup Setup the Digital Output transistor QStar UFM provides one digital output DO The DO is a transistor output open collector and is typically used as...

Страница 37: ...SETUP THE SERIAL INTERFACE RS232 Using a separate RS232 interface board is an option QStarUFMupgradesbysimplypluggingintheseparate RS232 board The RS232 sendsASCI strings including measurement data U...

Страница 38: ...that a data package is sent each five seconds i If you do not set a start time and date the communicationstartsimmediatelyaftersetting duration and interval CONFIGURE RECEIVER for example PC TO RECEI...

Страница 39: ...rm your entry with NEXT Assign a file name min 4 characters Use the arrow keys to select the letters or delete a letter by means of DEL Accept the letter with ENTER Select DONE and press ENTER to conc...

Страница 40: ...elect DONE andpress ENTER to exit data input Select SAVE to save the parameter data Select LOAD to load a parameter set from memory Select RENAME to rename the stored file Select Delete to delete the...

Страница 41: ...to access the I O setup menu In the primary measuring window Flow 1 Select SETUP CMPL SETUP In the complete setup menu select I O Setup SETUP THE 4 mA TO 20 mA CURRENT OUTPUTS QStarUFMprovidestwo4mAt...

Страница 42: ...of 20 mA However the flowrate may reach 130 m This means that a value of 20mA will also be output for flowrates higher than 100 m3 s i When do you have an error situation If limits of the values prev...

Страница 43: ...ch as flow QStar UFM applies the corresponding unit that is selected in the Units Setup setting and appended to the respective variable that is displayed in a measuring window Example If you selected...

Страница 44: ...it is overwritten with a new value word CALIBRATING THE TEMPERATURE SENSOR For more information on temperature sensor calibration refer to the section Measuring with QStar UFM Heat measurement SYSTEM...

Страница 45: ...Select SETUP CMPLSETUP In the main menu navigate to Damping CutOff Zero Damping Flow Specify an attenuation of signal output in this dialog Enter a damping time It is a T63 damping That means after d...

Страница 46: ...Power QMP 001 Software Reset Use software reset in all other cases like getting an implausible measurement or reading on the display Data stored on SD card will not be deleted Data stored internally...

Страница 47: ...ct Standard is the V mode If you selected the W mode you should first try the V mode 9 Verify the proper transducer distance Take the measurements at the transducer faces When using a spacer bar check...

Страница 48: ...ucer is mounted in V mode as standard but Z mode and W modes are possible This transducer receives the signals and returns another signal to UP transducer The time the signals needs from one transduce...

Страница 49: ...red Signals Use ZOOM ZOOM buttons to scale up scale down the measuring window decrease increase the time the window is open Use arrow buttons to move window left or right opens earlier later QStar UFM...

Страница 50: ...hase shifts within a signal package Figure 70 shows a sharp signal You can see approxi mately5wavesfollowedbyaphaseshiftandotherwaves FIGURE 70 Sharpness of signals Figure 71 shows diffused signals Th...

Страница 51: ...ignals When using F21 2MHz instead of F10 1MHz the signals become half as wide half of time which makes it easier to separate signals FIGURE 73 Separated Signals tp t1v t1w time Amplitude S e n d S ig...

Страница 52: ...nsates the influence when measuring laminar flow Re 8000 When measuring in that area a small additional uncertainty might occur Reynolds The number of Reynolds automatically affects the chosen compens...

Страница 53: ...oating delay Delay in signal run time generated by coating if applicable Lambda Corr Delay can be manually edited not recommended only for maintenance by multiples of wave length of signal Delay Corr...

Страница 54: ...56161 42 8 56335 44 6 56506 46 4 56672 48 2 56834 50 56992 51 8 57146 53 6 57297 55 4 57444 57 2 57587 59 57726 60 8 57862 62 6 57995 64 4 58124 66 2 58250 68 58372 F V in s 69 8 58492 71 6 58607 73...

Страница 55: ...F V in s C pg cm V m s V x10 6m2 s Acetone 68 00 46850 20 0 7905 1190 0 407 Aniline 68 00 65315 20 1 0216 1659 1762 Ether 68 00 39606 20 0 7135 1006 0 336 Ethylene glycol 68 00 65591 20 1 1131 1666 21...

Страница 56: ...Meas Range 98 ft s Signal Damping 0 100 sec adjustable Diagnostic Functions Acoustic velocity signal strength SNR signal quality amplitude energy Oscilloscope function allows graphical display and an...

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Страница 60: ...the product has been altered or modified outside the warrantor s duly appointed representative B the product has been subjected to neglect misuse abuse or damage or has been installed or operated othe...

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