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User Manual（Ver.7.50）

1. 150 300 285 240 211 3 22x8 24 200 350 340 295 266 3 22x12 24 250 450 405 355 319 3 26x12 26 300 500 460 410 370 4 26x12 28 350 550 520 470 429 4 26x12 30 400 600 580 525 480 4 26x16 32 450 700 640 585 548 4 30x20 34 500 800 670 620 585 4 25x20 32 600 1000 780 725 685 5 30x20 36 700 1100 860 810 775 5 24x25 32 800 oe 1200 975 920 880 5 24x30 32 900 1300 1075 1020 980 5 24x30 34 1000 1400 1175 1120 1080 5 28x30 36 2 9 Power on When switched on the ultrasonic flowmeter will run self diagnostic procedures and corresponding failure information will be shown in box of any fault Keyboard operation does not affect the measurement process because TDS 100 series have adopted time sharing technology for parallel processing Operations like measurement computation type display print serial port operation input and output etc are known as incidents and they are independent For example modification of time and date will not affect other tasks unrelated to time and date When the transducer is switched on if the flowmeter have been installed the adjustment of amplifier gain by the flowmeter can be seen in MO1 After showing the four steps of S1 S2 S3 and S4 at the upper left corner of the display the flowmeter will automatically enter the normal measuring state with R displayed
2. 00 99 for simplicity Although the instrument works well when the signal strength ranges from 60 to 99 stronger signal strength should be pursued because a stronger signal means a better result The following methods are recommended to obtain strong signals 1 If the current location is not good enough for a stable and reliable flow reading or if the signal strength is lower than 60 relocate to a more favorable location 2 Try to polish the outer surface of the pipe and apply more couplant to increase the signal strength 3 Tenderly adjust the position of the two transducers both vertically and horizontally while checking the signal strength Stop at the position where the signal strength reaches to maximum Then check the transducer spacing to make sure it is the same as or very close to what window M25 shows 4 If the installation method is V method and the pipe is big you may need to try Z method in order to get stronger signals 2 10 2 Signal Quality Signal quality is indicated as the Q value in the instrument A higher Q value would mean a higher Signal to Noise Ratio SNR and accordingly a higher degree of accuracy able to be achieved Under normal pipe condition the Q value is in the range of 60 99 the higher the better Causes for a lower Q value could be 1 Interference from other instruments and devices nearby such as a power frequency transverter which could cause strong interference Try to relocat
3. 1 in M77 Example C assume we need the OCT output to activate when flow rate exceeds 100 500m3 h and the relay output to activate when flow rate exceeds 600 1000m3 h The following setup steps would be recommended 1 Enter flow rate lower limit 100 in M73 2 Enter flow rate upper limit 500 in M74 3 Enter flow rate lower limit 600 in M75 4 Enter flow rate lower limit 1000 in M76 5 Select item 6 Alarm 1 in M78 6 Select item 6 Alarm 1 in M79 3 21 How to use the built in Buzzer The built in buzzer is user configurable It can be used as an alarm Use M77 for setups 3 22 How to use the OCT output The OCT output is an ON OFF type electrically isolated collector open circuit output It is user configurable You can program it to be an ON OFF type alarm signal or a totaliser pulse signal Notice that the Frequency Output shares the same OCT hardware When used as Frequency Output the OCT cannot be used for other purpose neither alarm signal nor totaliser pulse signal The OCT has two wiring terminals terminals 61 and 62 Terminal 61 is collector and terminal 62 is emitter Be careful of the polarity An external DC power supply Vx and an external pull up resistor Rx are needed for using the OCT Vx can be from 8VDC to 24VDC Rx can be from 1KOhm to 10KOhm The OCT can drive an alarm pulse counter frequency counter etc It can also be used to drive a relay which operates a valve system for in
4. Cubic feet USA liquid barrel Imperial liquid barrel Oil barrel 0 1 2 3 4 5 6 7 8 The flow unit in terms of time can be per day per hour per minute or per second So there are 36 different flow rate units in total for selection M32 Window for selecting the totalisers unit Available unit options are the same as those in M31 as Window for setting the totaliser multiplying factor The multiplying factor ranges from 0 001 to 10000 Factory default is 1 Turn on or turn off the NET totaliser Turn on or turn off the POS totaliser Turn on or turn off the NEG totaliser 1 Totaliser reset 2 Restore the factory default settings Press the dot key followed by the backspace key Attention it is recommended to make notes on the parameters before doing the restoration Manual totaliser used for calibration Press any key to start and press the key again to stop the totaliser Flow rate damper setup The damping parameter ranges from 0 to 999 seconds 0 means there is no damping Factory default is 10 seconds Low flow rate or zero flow rate cutoff to avoid invalid accumulation Zero calibration Zero point setup Make sure the liquid in the pipe is not running while doing this setup 36 CTS 100 Ultrasonic Flowmeter Ver 7 80 O O OZO O Z OOOO 100 Ultrasonic Flowmeter Ver 7 50 Clear the zero point value and restore the factory default zero point Set up a flow bias Gen
5. Welding the base of the ball valves For weldable pipes such as steel and stainless steel etc just weld the ball valves on the outer wall of the pipeline at the base Stainless steel should be welded to stainless base please indicate in your order Before welding the rust and paint on the section where the sensors are to be installed shall be cleaned up by using an angle grinder and the oil dirt and dust should be cleaned by using acetone or alcohol Make sure that the center of the ball valves overlap A and B respectively and that no air bubbles are made to prevent water leakage or even rupture For pipes whose material cannot be welded directly such as cast iron and cement etc special hoops with airproof rubber pads should be used The bases of the ball valves have been welded on the hoops These hoops are directly fixed on the pipe and make sure that the centers of the ball valves overlap A and B respectively Finally the ball valves should be closely fixed on the bases welded on the hoops to prevent water leakage Tailor made ball valves Weld the ball valves on the The bases of the ball valves Pipe material which outer wall of the pipeline welded on the hoops cannot be welded directly Special hoops Hole drilling Connect the seal sheath of the hole drilling machine and the outside thread of the tailor made ball valves then the drill pipe shall be locked to the handle rotary drill before the drill is switched on D
6. Your installation is bad if S lt 60 Q lt 60 and R lt 97 or R gt 103 Your installation is operational if S260 Q260 and 97 SRs103 Your installation is optimal if S280 Q280 and 99 lt Rs101 Note for high velocity flow the optimal range for R may be relaxed Display the transit time ratio R It is one of the installation triplet Refer to the above menu M90 for more details Display the fluid sound speed estimated by using the measured transit time If this value has an obvious difference with the actual fluid sound speed the user is recommended to check if the pipe parameters are correct and if the transducer installation is good upstream and downstream traveling Normally the delta time should not fluctuate over 20 If it does the system is not in stable condition You need to check your transducer installation and the entered installation parameters For small pipe the transit time value may not be stable In such case try to adjust transducer position until the transit time becomes stable Display the Reynolds number and the pipe factor used by the flow rate measurement program Pipe factor is calculated from the line averaged velocity and cross section averaged velocity information Upon entering into this window the circular display function is started automatically The following windows will be displayed one by one each window will stay for about 4 seconds M95 MOO gt M01 gt M02 gt MO3 gt M04
7. day month year accumulator M90 M94 windows for displaying diagnostic data including the installation triplet Those data are very useful when doing a more accurate measurement M95 Upon entering into this window the circular display function is started automatically The following windows will be displayed one by one each window will stay for about 4 seconds M95 MOO gt M01 gt M02 gt M03 gt M04 gt M05 gt M06 gt M07 gt M08 gt M09 gt M90 gt M95 M 0 M 9 windows for some additional functions including a single precision calculator display of the total working time and display of the time and the flow rate when the device is turned on and turned off 12 TDS 100 Ultrasonic Flowmeter Ver 7 50 Other menu windows are used for factory debugging For detailed explanation of the above windows please refer to chapter 3 How to and chapter 4 Menu Window Details 2 7 Steps to Configure the Parameters In order to make the flowmeter work properly the user must follow the following steps to configure the system parameters 1 Pipe size and pipe wall thickness For standard pipe please refer to Appendix 9 2 for outer diameter and wall thickness data For non standard pipe the user has to measure these two parameters 2 Pipe materials For non standard pipe material the sound speed of the material must be entered Please refer to Appendix 9 1 for sound speed data For standard p
8. 8 4 Important Notice for Product Return Before returning the instrument for warranty repair or service please read the following carefully 1 If the return item has been exposed to nuclear or other radioactive environment or has been in contact with hazardous material which could pose any danger to our personnel the unit cannot be serviced 2 If the return item has been exposed to or in contact with dangerous materials but has been certified as hazard free device by a recognized organization you are required to supply the certification for the service 3 If the return item does not have a RMA associated it will be sent back without any service conducted 58 TDS 100 Ultrasonic Flowmeter Ver 7 50 9 Appendix 9 1 Table 1 Sound Speed and Viscosity Data of Liquids Sound Speed Kinematic Viscosity Liquids mis we EE racer waer0 EE EET Carbon tetrachloride 938 EE aeea a N oes Oe 59 TDS 100 Ultrasonic Flowmeter Ver 7 50 9 2 Table 2 Sound Speed Data of Solids Sound Speed Material Table 3 Sound speed data of lining material Material Sound Speed Teflon Asphalt 2540 60 TDS 100 Ultrasonic Flowmeter Ver 7 50 9 3 Table 4 Sound Speed in Water at atmosphere pressure Unit t C v m s MEE EEN EEN WEE EE EEN Era ros as wns o veers EE NEE N wars as wo or ses re isso Twa ar woe s ous 7 soo er o see s isra eo soca as o isna WEN EE
9. F2 7kg FN 2 5kg FS 1 5kg l l F1 FN 251 X 192 x 80mm F2 290 X 270 X 110mm FS 80 Xx 250 x Dimension 160mm S1 type for pipe size 1 2 4 DN15 DN100mm M1 type for pipe size 2 28 DN50 DN700mm Clamp on L1 type for pipe size 11 240 DN300 DN6 000mm S1H type high temperature for pipe size 1 2 4 M1H type high temperature for pipe size 2 28 a Ds hoe for more than DN8Omm wetted Flow cell PI type for DN10 DN40 accuracy 0 5 Standard pipe for DN50 DN1000 accuracy 0 5 Temperature lt 160 C eae IP68 can work in water water depth less than 10 3m Class Virtually all commonly used clean liquids Liquids with small quantity of tiny particles may also be applicable Particle size n should be less than 75um particle concentration less than 20 000ppm Types Liquids should contain no or very minor air bubbles 4 Examples are chilled hot water sea water waste water chemical liquids oil crude oil alcohol beer etc Temperature 40 C 160 C Pipe Material All metals most plastics fiber glass etc 9 Pipe Size DN15mm 6000mm Q Pipe Straight More than 10D for upstream more than 5D for downstream 30D if a pump is near upstream where D is pipe diameter TDS 100 Ultrasonic Flowmeter Ver 7 50 2 Installation and messurement 2 1 Unpacking Please unpack the shipping box and check the parts and documents against the packing slip If there is something missing the device is damaged or so
10. TDS 100 Ultrasonic Flowmeter Ver 7 50 Acknowledgement from a MODEM Handshaking Request from a Flow meter AT CR LF GA CR 9 Please contact the A Command for GSM messaging manufacturer for detail GB CR 9 B Command for GSM messaging GC CR C Command for GSM messaging 10 Return the print buffer content In ASCII string format DUMP DUMPO Clear the whole print buffer In ASCII string format DUMP1 CR Return the whole print buffer content In ASCII string Format 24KB long Notes 0 CR stands for Carriage Return Its ASCII code is ODH LF strands for Line Feed Its ASCII code is OAH d stands for a digit number of 0 9 0 is expressed as 0 000000E 00 d stands for a digit number of 0 9 The number before E is integer Working status code 1 6 letters Refer to Table 5 2 for error code s is ON OFF or UD For instance TR ON RL UD means that the OCT is in closed state and RELAY is not used 5 stands for key value For instance value 30H means key 0 command M4 is equivalent to press key 4 6 a stands for current value a digit number of 0 20 For instance A02 34 A00 2 7 ddddddat stands for 8 digit electronic serial number t stands for flow meter type 8 If there are more than one flow meters in a network all the basic commands must be prefixed with N or W Otherwise multiple flow meters may reply to the same request 9 Adding
11. You can always use a and keys to find the right window There are three different types of menu windows 1 Menu windows for number entering e g M11 for setting up pipe outer diameter 2 Menu windows for option selection e g M14 for the selection of pipe materials 3 Results display windows e g window MOO for displaying flow rate etc For number entering windows the user can directly press the digit keys if the user wants to modify the value For example if the current window is on M11 and the user wants to enter 219 2345 as the pipe 11 TDS 100 Ultrasonic Flowmeter Ver 7 50 outer diameter then the flowing keys should be pressed DMAA ENT f For option selection windows the user should first press the key to get into option selection mode Then use l US or digit key to select the right option Consequently press the to make the selection For example assume your pipe material is stainless steel and you are currently on menu window M14 which is for the selection of pipe materials if you are on a different window you need to press MMENU o0 first in order to enter into the M14 window You need to press the key to get into the option selection mode Then either press the and keys to make the cursor on the line that displays 1 Stainless Steel or press the key directly At the end press again to make the selection Generally the key must be pressed to get into the option selection mode for option mod
12. in B A 310mm Pipe wall ers O ls wWiring After wiring pot head tail should be locked before the closure is fixed to prevent water leakage Transducers Wiring Since the flowmeter utilizes balanced topology for high performance ultrasonic transmitting and receiving it is recommended to use high frequency twisted cable with shielding as the transducer cable in order to guarantee the signal quality Negative black Positive red ed 8 Shielding GND Wiring terminals The hole to wire cable a HE Warning 1 Make sure that no problem of dregs blowholes and water leakage is made during welding the base of the ball valves Transducer cable 19 TDS 100 Ultrasonic Flowmeter Ver 7 50 2 The bases of the two ball valves should be welded on the same axis surface to prevent poor receiving of ultrasonic waves 3 The holes having been cut the impurities such as iron filings in the ball valve should be cleaned up so that the transducer probe may not get stuck or its thread get adhered 4 Make that the ultrasonic emitting surfaces at the front of the two transducers are face to face that is the pot head tails are in the same position and either upward or downward 5 After the transducer is installed the locking nut should be fixed to avoid transducer s being loose 6 The seal sheath should be fixed to prevent water after wiring 2 8 3 3 Flow cell transducer Flow cel
13. press key 6 Press key Wi to enter into M23 window Press key to get into the option selection mode Use keys and Vi to scroll up and down to the proper transducer type and then press key 7 Press key to enter into M24 window Press key to get into the option selection mode Use keys A and Y to scroll up and down to the proper transducer mounting method and then press key 13 TDS 100 Ultrasonic Flowmeter Ver 7 50 8 Press kevir to enter into M25 window The transducer installation distance will be displayed on the window Based on this distance and the transducer installation method selected above install the transducers on the pipe 9 After installation is completed check if the triplet signal strength S signal quality Q and transit time ratio R are in the right range Press keys MEW S O to enter into M90 window for visiting S and Q and press MENU 9 1 to visit R 10 Press LUSI to enter into window M01 to visit the measurement result 2 8 Transducer Mounting Allocation 2 8 1 Requirements for choosing measuring point The first step in the installation process is to select an optimal location for installing the transducers in order to make the measurement reliable and accurate A basic knowledge about the piping and its plumbing system would be advisable An optimal location would be defined as a long straight pipe line full of liquid that is to be measured The piping can be in vertical or hori
14. problem if the master device requires fast response 3 6 How to turn on off the totalisers Use M34 M35 or M36 to turn on or turn off the POS NEG or NET totaliser respectively 3 7 How to reset the totalisers Use M37 to reset the flow rate totalisers 3 8 How to restore the factory default setups Go to window NEUS 7 Press mel lt Keys This operation will erase all the parameters entered by the user and setup the instrument with factory default values 3 9 How to use the damper to stabilize the flow rate The damper acts as a filter for a stable reading Its damping constant is entered in window M40 Its unit is in second If 0 is entered that means there is no damping A bigger constant number brings a more stable effect But bigger numbers will prevent the instrument from acting quickly A constant from 15 to 30 is commonly used for the damper value 3 10 How to use the low flow cut off function The value displayed in window M41 is the low flow cut off When the absolute value of the measured flow velocity is below this value the measured velocity as well as flow rate will be replaced with 0 This is to avoid any invalid accumulation when the actual flow is below the low flow cut off value Application example when a pump is shut down the liquid will not stop immediately It will keep moving may be backward for a little while During this period the totaliser should be prevented from ac
15. 1001 Hz Note that the frequency signal can only be transmitted through the OCT output Therefore you need to set the OCT to be in frequency output mode Window to set up the minimum flow rate which corresponds to the lower frequency limit of the frequency output Window to set up the maximum flow rate which corresponds to the upper frequency limit of the frequency output LCD backlight control Available options Always OFF Always ON and Lighting For When Lighting For option is selected you need to enter a value which indicates how many seconds the backlight will be on with every key pressing LCD contrast control The LCD will become darker when a small value is entered Working timer It can be reset by pressing ENT key and then select YES Alarm 1 lower threshold setup When flow rate is below this threshold the Alarm 1 OCT circuit or relay will be activated There are two alarming methods OCT and relay User must select the alarming output method in window M78 or M79 Alarm 1 upper threshold setup When flow rate is above this threshold the Alarm 1 OCT circuit or relay will be activated There are two alarming methods OCT and relay User must select the alarming output method in window M78 or M79 Alarm 2 lower threshold setup When flow rate is below this threshold the Alarm 2 OCT circuit or relay will be activated There are two alarming methods OCT and relay User must select the alarming output method
16. Fixed Type Ultrasonic Flowmeter User Manual oz TDS 100 Ultrasonic Flowmeter Ver 7 50 CONTENTS 1 IMtrOGUCUION RE EE EE aruia usis SAP raas anuaus 4 YEH Ee RE RE EE EE EE ER caer ae 4 B 122 EE EE EE OE N N 4 1 3 Flow Measurement Principle sss eee eee 4 1 4 Typical Applications ee ee Re Re GR RA Re Re GR ee Re Re AA ee Re Re Ge ee ee Re Re ee ee Re ee ee Re Re ee ee Re 5 1 4 1 Applications sorted by industry process sese 6 1 5 Packaging List example as wall mount flowmeter eee eee 6 amp 1 6 Optional Parts esse cesses eas reeds ego bede deeg vee de Ge Ed Re EG Dee Ge ee ese dek bee Ee Wee Ve N od eek Edge 6 1 7 Technology Data EA EE ting esievnentvaiecousbanseecteveeades EE E E N E iene E 2 Installation and messurement sees KEER SES ESE ENE E EERS EE GE EER E KEER GR ERG GR EA R EE RE NEE GEREGEER BE EE WEERGEE OE WEKE EE Ee 9 BZA Bere die EE EE EE EE EE N ters 9 amp 2 2 Power SUPPLY sees sesse ees ek eds ee ees ge oge ee EN ed De n GE se E GN N Ge ee is laced Ge See 9 2 3 Wiring Diagram and Outline Drawings ee Re RA Ge Re Re AA ee Re GR ee ee Re Re ee ee Re GR ee ee ee 9 824 Keypad is SERE EE EE Ee N Ge E ee n ee Gee ee es ee De 11 2 0 Menu WIMGAOWS oss EE SG ER REG ee GER ee AE Ee Ee EKS Sk ONGEAG Eo ek GERS E Ve ed BEER ede es ee gee ee NEG 11 82 6 Menu Window EE NE RE atts iden cases EE a a 12 2 7 Steps to Configure the Parameters se ee ee Re GR Re Re Re RA ee Re RA ee ee Re GR ee ee Re Re ee ee e
17. Mortar 4 Polypropylene 5 Polystryol 6 Polystyrene 7 Polyester 8 Polyethylene 9 Ebonite 10 Teflon 11 Other need to enter sound speed in M17 Window for entering the sound speed of non standard liner materials Window for entering the liner thickness if there is a liner Window for selecting fluid type For standard liquids no need to enter liquid sound speed include 0 Water 1 Sea Water 2 Kerosene 3 Gasoline 4 Fuel oil 5 Crude Oil 6 Propane at 45C 7 Butane at OC 8 Other need to enter sound speed in M21 and viscosity in M22 9 Diesel Oil 10 Caster Oil 11 Peanut Oil 12 90 Gasoline 13 93 Gasoline 14 Alcohol 15 Hot water at 125C Window for entering the sound speed of non standard liquids Used only when item 8 Other is selected in menu M20 Window for entering the viscosity of non standard liquids Used only when item 8 Other is selected in menu M20 34 TDS 100 Ultrasonic Flowmeter Ver 7 50 Window for selecting transducer type There are 13 types 0 Standard M 7 Not Used Plug in Type C 8 Standard HS Standard S 9 Standard HM User Type 10 Standard M1 Standard B 11 Standard S1 Plug in Type B45 12 Standard L1 Stand L Window for selecting the transducer mounting methods Four methods can be selected 0 V method commonly used 1 Z method most commonly used 2 N method for small pipe rarely used 3 W method for small pipe Display t
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19. RA ee ee Re GR ee ee Re Re ee ee ee 29 3 24 How to modify the built in calendar sees se se se Re ee Ge Re RA Ge Re GR ee ee Re Re GR ee ee Re Re ee ee ee 30 3 25 How to adjust the LCD iis ees ees Ese EES EE a beavis be ee ee tara E 30 3 26 How to use the RS232 RS485 serial Interface eee eee eee 30 3 27 How to view the totalized HOW ee ee se se Re ee Re GR Re Ge Re Re Ge Re GR ee ee ee Re GR ee ee Re Re ee ee ee 30 3 28 How to connect analogue input signala sese eee eee eee 31 3 29 How to compensate the flow not measured during offline 0 iese ee Re ee Re Re Re ee Re 31 3 30 How to use the Working TIME cc cccsicccscsscies covesesscsacsteseosesssvavanesbacsacestesevactiscssntetesnstesas eek ske eek skede 31 3 31 How to use the manual totaliser sese 31 3 32 How to use the batch process controller eee 31 3 33 How to calibrate the analogue output oo ee se ee RA ee Re RA Ge Re Re Re Re Re GR ee ee Re Re ee ee ee 32 3 34 How to ch ck the ESN ii eks Se n SeSe e pied dienes See E E Rek GAS gek Ge Ge Gee Ge beg se ees aes 32 A Menu window details sers kE KERE sen SERE KERE ESE R ESE BE GE SOEKE ERGE ESE BEER O RA BEER E REGEER SR GR BEKER KERE EER RR E RS AREAS nee EE GE ENE E RS 33 5 Troubleshooting ees ER EER EE KEER EER RE ER EE ERGE GE EE ERG GER KERE BEER KERE REGEER EE ERGE GEKEER Ge TESTER 45 Hardware self diagnosis errors and solutions sese 45 Working Status Errors iis EE EE EE EE N EE N aS 46 Ot
20. TDS 100 Version 7 xx series ultrasonic flowmeter also has other three analog inputs known as AI3 Al4 and Al5 which can be used to input such signals as pressure temperature and residual chlorine etc All results about the above mentioned measurements can be transferred to the main unit through the communication protocols of TDS 100 series ultrasonic flowmeter In this way TDS 100 series ultrasonic flowmeter play a role of data monitoring network of RTU which can greatly reduce hardware complexity save costs and improve reliability Please note that the precision of analog input Al1 Al2 Al3 Al4 and AI5 is 12 bits and no electrical isolation is made for the inside lines If the meter is used in occasions of high demands or serious interference outside isolation measures should be taken 7 2 Wiring Analogue Inputs For caloric measurement the supply side temperature transmitter should be connected to channel Al1 terminal blocks 64 and 63 and the return side transmitter should be connected to channel Al2 terminal blocks 65 and 63 with twisted pair wiring Figure 1 An internal 24VDC power is proved to the terminals thus no external power supply is needed This means that the temperature or pressure transmitter must be two wire type transmitter Figure1 Analogue input wiring GND Al1 Al2 Al3 73 palel e A A 24V K gt UU __ Press transmitter Temp transmitter
21. a GSM module to the flow meter allows the user to check flow meter flow rate and other parameters from a cell phone 10 Used for visiting the printer buffer content KR OND 6 3 2 Protocol Prefix Usage 1 Prefix P The prefix P can be added before any command in the above table to have the returning data followed with two bytes of CRC check sum which is the adding sum of the original character string Take command DI CR Return POS Totaliser Value as an example The binary data for DI CR is 44H 49H 2BH and ODH Assume the return value of this command is 1234567E 0m3 CR LF the string in hexadecimal is 2BH 31H 32H 33H 34H 35H 36H 37H 45H 2BH 30H 6DH 33H 20H 52 TDS 100 Ultrasonic Flowmeter Ver 7 50 ODH OAH Then the P prefixed command PDI CR would return 1234567E 0m3 F7 CR LF The acts as the starter of the check sum F7 which is obtained by adding up the string 2BH 31H 32H 33H 34H 35H 36H 37H 45H 2BH 30H 6DH 33H 20H 2 F7H Please note that it is allowed to not have data entry or to have SPACES 20H character before the character 2 Prefix N N single byte address string basic command The prefix N is a single byte IDN network address not recommended in a new design Recommending W command 3 Prefix W The prefix W is used for networking commands The format of a networking command is W IDN address string basic command The IDN address shou
22. aking position paper take a 4D D refers to the pipe diameter long and 200mm or D wide 16 TDS 100 Ultrasonic Flowmeter Ver 7 50 rectangular paper tape according to actual situation on site the paper tape can also be replaced by moisture and corrosion resistant materials and draw a line about 100mm from the edge 100mm 200mm D Draw a line 4D i lt gt B Wrap the position paper on the cleaned surface of the pipeline making sure that the two paper sides are overlapping and aligned and thus the line drawn may be parallel with the pipe axis Pipe axis C Extend the line on the position paper to the pipeline and the cross point between the side of the position paper and the extended line is A measured and the cross point is C then draw a line at C to be parallel to the axis that is to be parallel with the line on the position paper Paralleling with the pipe axis E Removing the position paper and starting from C the installation spacing L should be measured along the lien draw on the pipe and the other end of L is B Thus A and B are the points where the transducers are to be installed For example L 280mm Then two ball valves should be welded respectively to A and B at the base making sure the centers of the ball valves overlap A and B respectively 280mm _ A w gt e O gt e 17 TDS 100 Ultrasonic Flowmeter Ver 7 50
23. alogue Values from a Network Computer ese see ee Re GR ee Re Re Re ee ee 57 8 Warranty and service sees see ER RR RR RR RR R enna EER RARR E EER REKE ERG RR RR REGEER RR KERE GER RR RE RE RARR EER Ee ERK ER EG e RR RR Ee SE RR EE 58 8 1 Warranty IE RE ER OE aa 58 AA EE OR EE EE EE doves N 58 8 3 Software Upgrade Service Re Ge Re RA ee Re Re AA ee Re GR ee ee Re Re AA ee Re GR ee ee Re RA ee ee ee 58 8 4 Important Notice for Product RetuF iese sesse eee 58 9Appendi iss ees NR ae se Ed eed ei Ee ee Ge AR Ke De Ad wed ODE dee be Oe ee ad ae aadA An SR ee 59 9 1 Table 1 Sound Speed and Viscosity Data of Liquids sss 59 9 2 Table 2 Sound Speed Data of Solde 60 TDS 100 Ultrasonic Flowmeter Ver 7 50 1 Introduction 1 1 Preface Welcome to the TDS 100 Version 7 xx series ultrasonic flowmeter which has been manufactured with patent technologies and is equipped with more powerful functions and advanced performance than our pervious versions The Version 7 xx series ultrasonic flow meter has been upgraded based on the Version 5 xx series ultrasonic flow meter the Version 7 xx series ultrasonic flowmeter is a brand new universal time difference method ultrasonic flowmeter in which the patent technology of balanced lower voltage multi pulse igniting is adopted to satisfy the continuous industrial flow and heat quantity measurement of most clean and uniform liquids without high density of suspension particles and gas T
24. and ease of operation 2 Calculate the transducer spacing Just enter the pipe fluid and transducer information through menu M11 to M24 the flow meter will calculate the transducer spacing automatically The value will 15 TDS 100 Ultrasonic Flowmeter Ver 7 50 be shown in M25 Marking the transducer installation spots on the pipe according to this spacing value 3 Clean any dust and rust on the spot where the transducers are to be installed For a better result polishing the pipe outer surface with a sander is strongly recommended 4 Apply adequate ultrasonic couplant grease gel or Vaseline onto the transducer surface as well as to the installation area on the pipe surface 5 Strap on the transducers using clamp fixture If the pipe is metal no need to use clamp fixture since the transducer has magnetic built in Make sure there is no gap between the transducer surface and the pipe surface 6 Fine tune transducer position until the triplet signal strength S signal quality Q and transit time ratio R have the best readings and those reading are in their operational ranges S260 Q260 and 97 s R 103 It is even better if you can tune those readings into their optimal ranges S280 Q280 and 99 R s101 Note for large velocity flow the R values may exceed this range to some degree 2 8 3 2 Insertion transducer installation Three types of isertion transducers are optional Transducers can be installed directly
25. at the upper left corner The pipeline parameters should be input when the transducer is used for the first time or is located at a new position All parameters entered by users will be permanently recorded in its NVRAM by TDS 100 series ultrasonic flowmeter until users revised them When users revises the parameters or moves the transducers the main unit will automatically re calculate and adjust operating according to the new parameters entered by users TDS 100 series ultrasonic flowmeter is able to complete all the tasks at the same time and at whatever display window tasks like measuring and output carried out without suspended 2 10 Installation Check up After the completion of transducer installation the user should check the following items the receiving signal strength S the signal quality Q value the delta time traveling time difference between the upstream and the downstream signals the estimated liquid sound speed the transit time ratio R and 21 TDS 100 Ultrasonic Flowmeter Ver 7 50 etc As such one can be sure that the flow meter is working properly and the results are reliable and accurate 2 10 1 Signal Strength Signal strength S indicates the amplitude of receiving ultrasonic signals by a 3 digit number 000 means there is no signal detected and 999 refers to the maximum signal strength that can be received Note that sometimes when no confusion will be introduced S value is expressed by two digits
26. ays Off means that the backlight will TE remain off always Times means that the backlight will keep on for x seconds which should be keyed in after selecting Times Use M71 to adjust the LCD contrast This is necessary when the letters on the screen are not clear and the viewing angle is offset Press WENU 7 1 ENT You should see gt on the screen Use or Yi to increase or decrease the contrast 3 26 How to use the RS232 RS485 serial interface The flowmeter family flow meters are equipped with a RS232C standard serial interface The RS232 interface is wired to a DB9 connector The data rate can be set to 75 115200 Baud Use M62 to configure this interface Refer to Chapter 6 for more details You may use an external RS232 to RS485 converter to connect the flow meter to a 485 bus 3 27 How to view the totalized flow Use M82 to view the daily monthly and yearly totalized flow To view the last 64 days flow history press MENU 8 2 then select item 0 for Day You should see the serial number and the date on the first line and the net totalized flow for this specific day Note that on the upper right corner you may see which indicates that the system was normal during that day If you see other characters error occurred in that day Please refer to chapter 5 for error code explanation and resolution To view the flow for a month or a year press MENU 8 2 and sel
27. ct the manufacturer CPU or IRQ Error 2 Permanent problems with ROM Parity Error hardware Adjusting Gain gt s1 Instrument is in the progress No need for action Adjusting Gain gt s2 of adjusting the gain for the signal and the number indicates the progressive steps Adjusting Gain gt s3 Adjusting Gain gt s4 shown in MOO MO3 1 No liquid inside the 1 If the pipe is not full pipe relocate the meter to where the Empty pipe 2 Incorrect setup in pipe is full of liquid M29 2 If the pipe is full enter 0 in M29 Other Problems and Solutions 1 Q Why the instrument displays 0 0000 flow rate while the liquid in the pipe is actually flowing The signal strength is checked to be good the working status is R and the signal quality Q has a satisfactory value A The problem is likely to be caused by the incorrect Zero Point setting The user may have conducted the Zero Point setup while the flow was not standstill To solve this problem use the Reset Zero function in menu window M43 to clear the zero point 2 Q The displayed flow rate is much lower or much higher than the actual flow rate in the pipe under normal working conditions Why A The entered offset value might be wrong Enter 0 offset in window M44 a Incorrect transducer installation Re install the transducers carefully b The Zero Point is wrong Go to window M42 and redo the Zero Point setup Make sure tha
28. cts in materials and workmanship for a period of one year from the date of shipment to the original purchaser Abest Technology s obligation should be limited to restoring the meter to normal operation or replacing the meter at Abest Technology s choice and shall be conditioned upon receiving written notice of any alleged defect within 10 days after its discovery Abest Technology will determine if the return of the meter is necessary If it is the user should be responsible for the one way shipping fee from the customer to the manufacturer 8 2 Service For operational problems please contact the technical support department by telephone fax email or internet In most cases problems could be solved immediately For any hardware failure of the instrument we recommend our customers to send back the instrument for service Please contact the technical support department with the model number and serial number of the unit before sending the unit back to us Both numbers can be found on the product label For each service or calibration request we will issue a Return Materials Authorisation RMA number Take notice that the cost for repairing can only be determined after receipt and inspection of the instrument A quotation will be sent to the customer before proceeding with the service 8 3 Software Upgrade Service We provide free of charge software upgrade services Please contact the factory for any lately developed software
29. cumulating This can easily be done by setting the low flow cut off velocity to a certain value such as 0 1ft s 0 03m s The low flow cut off operation does not affect the flow measurement when the actual flow is greater than the low flow cut off value 3 11 How to conduct zero calibration When the flow in a pipe is absolutely stopped the flow meter could still give a small non zero flow rate reading In order to make the measurement accurate it is necessary to remove this zero point reading Window M42 allows us to take care of this issue At first the user should make sure that the liquid in the 25 TDS 100 Ultrasonic Flowmeter Ver 7 50 pipe is totally stopped no velocity Then go to window M42 and press the key to start the zero point setup function Wait until the counter reading goes down to 00 3 12 How to change the scale factor A scale factor is the ratio between the actual flow rate and the flow rate measured by the flow meter It can be determined by calibration with standard flow calibration equipment You may change the scale factor in menu window M45 The scale factor is transducer dependent Prior to shipment from the factory the scale factor of a transducer pair is calibrated on a pipe with water flowing inside If you ordered multiple pairs of transducers be sure you entered the scale factor of the transducer pair you are using The scale factor is also affected by other factors such a
30. dward problem Turn off the power then turn on the power again If the problem remains refer to Chapter 5 for diagnosis details If an H flashes instead the received signal is poor 3 2 How to check the liquid flowing direction Assume that transducer A is connected to the upstream terminals and transducer B is connected to the downstream terminals First make sure that the instrument works properly Then check the flow rate reading If the value is positive the direction of the flow will be from transducer A to B Otherwise the flow is from B to A 3 3 How to change units systems Use menu window M30 for the selection of units systems either English option 0 or in Metric option 1 3 4 How to select a flow rate unit Use menu window M31 to select the flow rate unit use menu window M32 to select the flow totaliser unit 3 5 How to use the totaliser multiplier Use window M33 to select a proper multiplying factor for the totalisers POS NEG and NET Make sure that the rate of the totaliser pulse is not too fast neither too slow A speed of several pulses per minute is preferable 24 TDS 100 Ultrasonic Flowmeter Ver 7 50 If the totaliser multiplying factor is too small the output pulse will be very fast and there could be a loss of pulses The designed minimum pulse period is 500 milliseconds If the totaliser multiplying factor is too large the output pulse will be very slow which might be a
31. e gt Pump 6 Make sure that the temperature on the location does not exceed the range for the transducers Generally speaking the closer to the room temperature the better 7 Select a relatively new straight pipe line if it is possible Old pipe tends to have corrosions and depositions which could affect the results If you have to work on an old pipe we recommend you to treat the corrosions and depositions as if they are part of the pipe wall or as part of the liner For example you can add an extra value to the pipe wall thickness parameter or the liner thickness parameter to take into account the deposition 8 Some pipes may have a kind of plastic liner which creates a certain amount of gaps between liner and the inner pipe wall These gaps could prevent ultrasonic waves from direct travelling Such conditions will make the measurement very difficult Whenever possible try to avoid this kind of pipe If you have to work on this kind of pipe try our plug in transducers that are installed permanently on the pipe by drilling holes on the pipe while liquid is running inside 9 When select the measurement site you may need to consider where to mount the flow meter main unit Normally electronics are housed in a weather resistant enclosure It can be mounted in a meter shed or a location that allows easy access to the flow meter for programming and servicing 10 When select the measurement site you may also need to consider how t
32. e 13 2 8 Transducer Mounting AllocatiON ee ee ee ee GR RA ee Re RA Ee Re GR Re Re Re GR ee ee Re Re ee ee ee 14 2 8 1 Requirements for choosing measuring DONE ee Re RA Re Re RA ee Re Re ee ee Re 14 2 8 2 Meter well construction requirements sees 15 2 8 3 Transducers Installation ee ee ee RA Re RA ee Re RA a Re Re a Re ee ee Re 15 VAR POWEM ON EE OE EE ER EE EO ER EE OE EE aes 21 2 10 Installation CheeksUPi ie Es ENS ERGER Ie ee ER GESELS Ek INGANGE e ERG dee Ee oe EEN eg ee ee Gee NR Ge bees 21 2 10 1 Signal Streng ESE ee se eens Ge Ed se Ge Se Se ee des eller eg Gee doe Ee sege ge dd Des 22 amp 2 10 2 Signal Ouality ie ES bek ES bek oe Se GEE EG GR EKG Vee VEN ee eek Dek Geek eN ee Ge Geeneen Ede ts 22 2 10 3 Total Transit Time and Delta Time sesse se ee GR Re Ge Re GR Re Re Re AA ee Re Re ee ee Re 22 amp 2 10 4 Transit Time Ratio EES oe Ee SG Ge Geek ee Ke oe eN EN Gee ke Ge ee bee Es 23 BOW EO ceed A E E 24 3 1 How to check if the instrument works Properly sees eee eee eee eee 24 3 2 How to check the liquid flowing directiON ee se eee eee 24 3 3 How to change units SYStOMs cc ecceeseessesessesseseeseseseeseeseseesecsesseesenecsecseneeeesecseeseneeeeeeseeaeneeaes 24 3 4 How to select a flow rate unit oo ee eee 24 3 5 How to use the totaliser MUItiplier ee ce see ee Re Re Re Re Re Re ee Re GR Re ee Re GR ee ee Re Re ee ee ee 24 3 6 How to turn on off the totaliser
33. e and calibration instructions occur If 2 is shown it indicates connecting problems if gt it indicates good connections In box of calibration error press ENT when ready is shown to demand re calibration After calibration the result is shown and the number should be between 255 to 255 Open M 3 to calibrate 20MA input signal of Al1 The calibration method is to make Al1 input terminals be connected with standard 20mA and then follow the same steps as the 4mA input calibration of Al1 Open M 4 and M 5 to calibrate the current input signal of Al2 Follow the same steps as the current input signal calibration of Al1 Open M 6 and M 7 to calibrate the current input signal of Al3 Follow the same steps as the current input signal calibration of Al1 Open M 8 and M 9 to calibrate the current input signal of Al4 Follow the same steps as the current input signal calibration of Al1 7 6 Read Input Analogue Values from a Network Computer When the flow meter is networked all the analogue data can easily be visited from a remote computer For visiting the present analogue input current use command BA1 BA2 BA3 or BA4 For visiting the temperature pressure value represented by the analogue input current use command Al1 Al2 Al3 or Ald 57 TDS 100 Ultrasonic Flowmeter Ver 7 50 8 Warranty and service 8 1 Warranty The products manufactured by Abest Technology and Instruments Co Ltd are warranted to be free from defe
34. e the flow meter to a new place where the interference can be reduced 2 Bad sonic coupling between the transducers and the pipe Try to polish the pipe surface again clean the surface and apply more couplant etc 3 The selected pipe section is difficult to conduct the measurement Relocate to a more favorable pipe line 2 10 3 Total Transit Time and Delta Time The total transit time or traveling time and the delta time are displayed on menu window M93 They are the primary data for the instrument to calculate the flow rate Therefore the measured flow rate will vary as the total transit time and delta time vary The total transit time should remain stable or vary in a very small range The delta time normally varies less than 20 If the variation exceeds 20 in either positive or negative direction there could be certain kinds of problems with the transducer installation The user should check the installation for sure 22 TDS 100 Ultrasonic Flowmeter Ver 7 50 2 10 4 Transit Time Ratio Transit time ratio R is usually used to check whether the transducer installation is good and whether the entered pipe parameters are in consistency with their actual values If the pipe parameters are correct and the transducers are installed properly the transit time ratio should be in the range of 100 3 Particularly when the flow is stand still the ratio should be very close to 100 If this range is exceeded the user should c
35. ect item 1 for Month or 2 for Year 30 TDS 100 Ultrasonic Flowmeter Ver 7 50 3 28 How to connect analogue input signals There are five analogue input channels which can be used to connect to five channels of 4 20mA signals They are digitized and then acquired by the flow meter The data can then be sent to a remote computer or controller through RS232 upon request Refer to chapter 6 for communication details The input analogue signal can be of pressure temperature or other physic quantities When analogue inputs Al1 and Al2 are connected to the hot and cold temperature sensors of a liquid thermal energy supply system the flow meter can measurement the thermal energy consumption of the system Menu window MOG displays the present current and its corresponding pressure temperature value The terminals assigned to these analogue inputs are Al1 64 and 63 Al2 65 and 63 AI3 73 and 63 Ald 74 and 63 AIS 75 and 63 Al3 Al4 and AI5 are not connected to terminals Please contact the manufacturer if needed 3 29 How to compensate the flow not measured during offline When the power is down the flow meter will not be able to conduct flow measurement In order to compensate the flow uncounted during the offline period you need to enable Automatic Amending function before the flow meter is offline To enable the Automatic Amending function switch to M83 press key then select YES and press ENT agai
36. eline leakage detection HVAC hydronic balancing Energy supply and production systems Flow measurement networking VEE RR Me ee ROEP OP 1 5 Packaging List example as wall mount flowmeter Main unit AC220V DC24V 8 36V 1 Unit M1 type clamp on transducer for 27 28 pipe 1 Pair Dedicated shielded transducer cable Metre Clamp Fixture 1 Set Allen Wrench 1 Piece Spare Connectors 1 Set Silicon Couplant 2 Piece User s Manual 1 Piece Packing List 1 Page 1 6 Optional Parts S1 type clamp on transducer for small pipe 1 2 4 L1 type clamp on transducer for large pipe 11 240 S1H type Clamp on high temperature tranducer for small pipe 1 2 4 M1H type Clamp on high temperature tranducer for middle pipe 2 28 Insertion wetted transducer Flow cell transducer Shielded transducer cable UPS 72 type Shielded wall mount ultrasonic flowmeter non incessant power 72 hours Ultrasonic thickness measure the pipe s thickness improve accuracy GSM GPRS wireless data transmission module TDS 100 Ultrasonic Flowmeter Ver 7 50 1 7 Technology Data Sheet Humidity ltem Performance Parameters Accuracy Better than 1 0 Repeatability 0 2 Velocity 32m s Measurement 0 5S Period Measurement us ae ad Transit time measurement principle Principle Display LCD with backlight 2x20 letter
37. ell transducer All of them do not block the flow thus do not generate pressure drop The transducers can be mounted in V method where the sound transverses the pipe fluid twice or in W method where the sound transverses the pipe fluid four times or in Z method where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe fluid once The selection of the mounting methods depends on pipe and liquid characteristics 1 4 Typical Applications The flow meter can be applied to a wide range of pipe flow measurements Applicable liquids include pure liquids as well as liquid with small quantity of tiny particles Examples are yx Water hot water chilled water city water sea water waste water etc yx Sewage with small particle content yx Oil crude oil lubricating oil diesel oil fuel oil etc yx Chemicals alcohol acids etc Xx Plant effluent yx Beverage liquid food yx Ultra pure liquids yx Solvents and other liquids TDS 100 Ultrasonic Flowmeter Ver 7 50 1 4 1 Applications sorted by industry process yx Water and waste water management yx Water and waste water treatment plants Power plants such as nuclear power plants and hydraulic power plants Mining and metallurgy plants Petroleum process monitoring and control Chemical process monitoring and control Pulp and paper process monitoring and control Food and beverage processing Marine maintenance and operation Pip
38. erally this value should be 0 Flow rate scale factor Keep this value as 1 when no calibration has been made Network address identification number IDN Any integer can be entered except 13 0DH carriage return 10 OAH line feeding 42 2AH 38 26H amp 65535 Every set of the instrument in a network environment should have a unique IDN Please refer to chapter 6 for communications System locker to avoid modification of the system parameters Contact the manufacturer if the password is forgotten Keypad locker to avoid any operation errors by unauthorized personnel Contact the manufacturer if the password is forgotten lt Communication tester Window to configure the scheduled output function To turn on the function select YES The system will ask for selecting the output data items There are 15 data items available Turn on all the items you want to output Window to setup the time of the scheduled output function This includes start time time interval and lasting period Minimum time unit is second Maximum time interval is 24 hours Used for analogue input Al5 Display the current loop value and corresponding temperature pressure liquid level of analogue input channel Al5 Used for analogue input Al5 Set the minimum and maximum values of temperature pressure liquid level which correspond to input current of 4mA and 20mA SAT TDS 100 Ultrasonic Flowmeter Ver 7 50 Select the current
39. error code DA CR OCT or RELAY alarm signal 4 TR s RL s CR T CR Return the current date and time yy mm dd hh mm ss CR iN MEd LCD CR Return the current display contents 50 TDS 100 Ultrasonic Flowmeter Ver 7 50 em ESE NN H R FOdddd CR Force the FO output to output a frequency of dddd Hz Fdddd CR LF Aoa CR Output current a at the current loop output terminal 6 AQa CR LF BA1 CR Return current value of Al1 0 20mA d ddddddE dd CR LF BA2 CR Return current value of Al2 0 20mA d ddddddE dd CR LF BA3 CR Return current value of Al3 0 20mA d ddddddE dd CR LF BA4 CR Return current value of Al4 0 20mA d ddddddE dd CR LF Al1 CR Return temperature pressure value of Al1 d ddddddE dd CR LF Al2 CR Return temperature pressure value of Al2 d ddddddE dd CR LF AI3 CR Return temperature pressure value of Al3 d ddddddE dd CR LF AI4 CR Return temperature pressure value of Al4 d ddddddE dd CR LF ESN CR Return the electronic serial number ESN of the flow meter dddddddt CR LF Prefix of an IDN addressing based networking command The IDN address is a word ranging 0 65534 Prefix of an IDN addressing based networking command The IDN address here is a single byte value ranging 00 255 re Prefix of any command with checksum Command binder to make a longer command by combining up to 6 commands RING CR LF Handshaking Request from a MODEM ATA CR LF 51
40. gt Temp transmitter gt Menu window NOG displays the current analogue input data and its corresponding pressure or temperature value The flowmeter can accommodate five analogue signals with its five analogue input modules Al1 and Al2 are available in standard options The other three modules are available only upon request 55 TDS 100 Ultrasonic Flowmeter Ver 7 50 7 3 Thermal Energy Measurement There are two methods for thermal energy calculation 1 Qt Qx T2 T1 x Ct 2 Qt Q x TC2 TC1 Where Qt is the thermal energy or caloric consumed Q is the flow rate T1 and T2 are the temperature at supply and return points respectively Ct is the specific heat or the thermal capacity coefficient of the fluid which can be entered in menu M86 For water it is normally about 0 0041868GJ m3 C TC1 and TC2 are the thermal capacities corresponding to temperature T1 and T2 which are calculated by the flow meter according to international standards and displayed in MOS The following menu windows might be used when performing thermal energy measurement Menu window MOS display energy and totalized energy Menu window MOS display the current values of input Al1 and Al2 and their corresponding temperature values Menu window M63 set the minimum and maximum temperature values which correspond to the minimum current 4mA and maximum current 20mA of channel Al1 Menu window M64 set the mini
41. gt MOS gt MO6 gt M07 gt M08 gt MO9 gt M90 gt M95 This function allows the user to visit all the important information without any manual action To disable the function simply switch to anther window 43 E Display the average transit time and the delta time transit time difference between SCT S 100 Ultrasonic Flowmeter Ver 7 80 000 O O O OZO O Z OOOO 100 Ultrasonic Flowmeter Ver 7 50 View the last 64 records of power on and off events The recorded information include the date and time as well as the corresponding flow rate when the power on or off occurs Display the total working time of the instrument since the flow meter left the factory Display the date and time of the last power off event Display the flow rate of the last power off event Display the total number of times the flow meter has been powered on and off since the flow meter left the factory Set fluid sound speed threshold When the estimated sound speed M92 exceeds this threshold an alarm signal will be generated and transmitted to OCT or relay This function can be used to generate an alarm when fluid material changes Display the received signal In normal condition this signal should be stable and signal amplitude does not vary much Display the present temperature values integer portion of analogue input Al1 and Al2 Display water heat capacity at this temperature Entry to hardware adjusting w
42. he 20 4 20mA and 20 0 20mA modes the polarity of the actual flow reading is ignored In 0 4 20mA mode the minimum must be negative and the maximum must be positive The last one in the following figures is for velocity output The output current represents flow velocity 4 A TE Output current TE Output current ma Output current 20mA 20mA 20mA 4mA flow gt F4mA F20mA flow flow 4 Output current Output current 24mA 7 24mA 24mA N C9 20mA j 7 Output current C X gt gt F20mA F4mA F4mA F20mA F20mA F4mA F4mA F20mA flow flow flow flow flow flow flow flow 38 TDS 100 Ultrasonic Flowmeter Ver 7 50 4mA or OmA output value Set the flow rate value which corresponds to 4mA or OmA output current 4mA or OmA is determined by the settings in M55 The flow unit options are the same as those in M31 If velocity 4 20mA is selected in M55 the unit should be set to m s 20mA output value Set the flow rate value which corresponds to 20mA output current Refer to M31 for flow unit options Current loop verification Check if the current loop has been calibrated before leaving the factory PresslENT and use or to display OmA 4mA 24mA one after another For each one check with an ammeter to verify that current loop output terminals agree with the displayed values It is necessary to re calibrate the current loop if over the permitted tolerance Display p
43. he system error codes Display today s total NET flow Window for entering the peripheral of the pipe If pipe outer diameter is known skip this menu and go to menu M11 to enter the outer diameter Display the current date time and flow rate The time setting method is found in M60 33 SCT DS 100 Ultrasonic Flowmeter Ver 7 80 O O O OZO O O O O OOOO 100 Ultrasonic Flowmeter Ver 7 50 Window for entering the outer diameter of the pipe Valid range 10 to 6000mm Note you just need to enter either outer diameter in M11 or pipe peripheral in M10 Window for entering pipe wall thickness You may skip this menu and enter inner diameter in M13 instead Window for entering the inner diameter of the pipe If pipe outer diameter and wall thickness are entered correctly the inner diameter will be calculated automatically thus no need to change anything in this window Window for selecting pipe material Standard pipe materials no need to enter the material sound speed include 0 carbon steel 1 stainless steel 2 cast iron 3 ductile iron 4 copper 5 PVC 6 aluminum 7 asbestos 8 fiberglass epoxy 9 Other need to enter sound speed in M15 Window for entering the sound speed of non standard pipe materials Window for selecting the liner material Select none for pipes without any liner Standard liner materials no need to enter liner sound speed include 1 Tar Epoxy 2 Rubber 3
44. he transducer mounting spacing or distance Entry to store load the system setup parameters pipe parameters fluid parameters transducer parameters etc Three operation methods available 1 Entry to Save 2 Entry to Load 3 To Browse To save the current setup parameters select Entry to Save and press ENT An address number and original parameters will be displayed Use or TH key to change address number Press again will save the current setup parameters into the selected address space Display the cross sectional area inside the pipe Entry to determine whether or not to keep the last good value when poor signal condition occurs This function allows continued flow totalizing YES is the factory default Entry to set empty pipe signal threshold When the signal strength is less than this threshold the pipe is classified as empty pipe and the flow meter will not totalize the flow This is based on the fact that when the pipe is empty the transducer can still receive signal just smaller than normal As a result the flow meter will show normal operation which is not correct 35 TDS 100 Ultrasonic Flowmeter Ver 7 50 Window for selecting unit system The conversion from English to Metric or vice versa will not affect the unit for totalisers Window for selecting flow rate unit system Flow rate can be in Cubic meter short for m3 Liter USA gallon Imperial Gallon Million USA gallon
45. heck a If the entered pipe parameters are correct b If the actual spacing of the transducers is the same as or close to what shown on window M25 c If the transducer are installed properly in the right direction d If the mounting location is good if the pipe has changed shape or if the pipe is too old i e too much corrosion or deposition inside the pipe e If there is any interference source inside of the pipe f If there are other aspects which do not meet the measurement requirements as recommended earlier 23 TDS 100 Ultrasonic Flowmeter Ver 7 50 3 How to 3 1 How to check if the instrument works properly Switch to menu M08 by entering MEMOS keys If R is displayed on the screen the instrument is working properly If E is displayed the current loop output is over ranged Increasing the range setting in M57 will make the E letter disappear If you do not use current loop output you may ignore this error If Q is displayed the frequency output is over ranged Increasing the range setting in M69 will make the Q letter disappear If you do not use frequency output you may ignore this error If G is displayed the flow meter is adjusting system gain This is normal as far as it does not last long If T is displayed there is no signal received Check if the transducer cables are connected properly and transducers are clamped firmly If J is displayed there is har
46. her Problems and Rees ss SR SEGE SN SGE SE ERG ERNA EN Sek Gk ENGEN GEK ENG SN GR EKS DS EE KEN ade ERNS bee Nnnna EN As de ee Eg AT 6 Communication Protocol issie ss EER EERS EER EER RE cx anne GEGEE REKE E RE RAN RE ERK adanan araia anida aaaea ANES 49 amp 6 1 R 232 Connector Pin OUt ie ks EES SR ER NE de Ede SN EEN GER Re Ge eN e Ned Se enge ekke dogs 49 662 RS292 WIM EE EE EE EE N a GE OR De Re ie 49 amp 6 3 COMMUNICATION Protocol Ee SEE ee ER Geek Se dk NE EE ees ee Ge Re ees ee EE Rek en Vee gee ek ese Ds 50 TDS 100 Ultrasonic Flowmeter Ver 7 50 6 3 1 Basic COMMAmNdS EE EE EO OE 50 amp 6 3 2 Protocol Prefix Usages ceii Ee ed Se Ge ge ee Ge se ees se se ge Re Ee ee ee gl ee 52 6 3 3 Codes for the keypad iii re se Ee RSG Ee akin aoa aeolian ta Sek Edge 53 6 3 4 Programming Examples isi Essie ese Ee ese tea See ed eats Hussain ion aati Ge Ge Henin leash eens 54 7 Measurements of thermal and Other physical parameterS ure esse ee RR REKE ERGE ER RE REGEER RR sse essere essere 55 AA Tass Me RE EE EE RE EE eaeeteite 55 amp 7 2 Wiring Analogue INDUSEER ene ge ee EERS REEN Ee eek EN ee Ve ke Sk De ed eke GN Ee iie 55 7 3 Thermal Energy Measurement ees esse ese se ee ae ee Re RA ee Re Re ee Re GR GR ee ee Re GR ee ee Re Re ee ee ee 56 7 4 Configure Analogue Measurement Range eee eee eee eee 56 7 5 Analog Input Calibration cscs sesse ss Ed Es see ER dbe Ee Ge Edge De n A E ee Reg ei Else 57 7 6 Read Input An
47. his manual is made for the introduction of the TDS 100 Version 7 xx series ultrasonic flowmeter giving respectively detailed information of the wall mount panel mount and explosion proof types in this series 1 2 Features Better than 0 5 linearity Die cast aluminium weather resistant 0 2 of repeatability enclosure standard version Bilingual interface in Chinese and English Able to measure electrically conductive and 1 of accuracy at velocity above 0 6ft s non conductive liquids 0 2m s RS 232 interface Complete communication Positive negative net flow totaliser protocol for instrument networking Proprietary low voltage transmission and Can be used as a flow RTU self adaptation technologies 5 channel 12 bits analogue 4 20mA input Anti interference design 1 channel programmable 4 20mA output Dual CPU 100 Pico second time 2 channel programmable digital output isolated measurement resolution OCT and Relay Operates with all Hipeak Instruments Frequency output transducers including clam on insertion Internal batch process controller wetted and flow cell wetted types 2x20 letters backlight LCD display 4x4 key tactile feedback membrane keypad 1 3 Flow Measurement Principle The ultrasonic flow meter is designed to measure the velocity of liquid within a closed conduit It uses the well know transit time measurement principle plus our proprietary signal processing and ultrasonic tran
48. ic Flowmeter Ver 7 50 first and second numbers respectively You can view the present current signal value and corresponding temperature data from window MOG Example 2 assume a pressure transmitter outputs current 4mA at 0 98kg pressure and 20mA at 10 5kg pressure The transmitter is connected to channel Al3 Then you need to enter 0 98 and 10 5 in window M65 The present values of input current and corresponding temperature are shown in MOT If you find the current value from the transmitter is different from the one shown in MO6 or M07 you need to calibrate the corresponding analogue channel Please see section 3 16 for calibration detail 7 5 Analog Input Calibration In normal situations unless users found that the current value shown in MOG and MO7 is inconsistent with the actual one added to the analog input do not conduct this operation Before calibration the hardware debug window should be opened and the method is as follows Type WENU W 0 ENT and enter the password 4213068 and then type to open the debug menu The opening of the window is only effectively during this power on period and the window is closed automatically when power is off Open M 2 to calibrate 4MA input signal of Al1 10 seconds after Al1 input terminals 37 and 38 signal terminals are connected with standard 4mA current signal type WENU W 0 ENT see the diagram 0 58 in the bottom line is the last calibration result then typ
49. ication Protocol The ultrasonic flow meter integrates a standard RS 232C communication interface and a complete set of communication protocol Its hardware supports MODEM for phone line based data networking With the aid of a RS232 RS485 converter the flow meter can be connected to a RS485 network bus You may also use our GSM short message module to transmit flow data to a remote computer With the GSM module you are even able to check the flow data and flow meter status from your cell phone When using RS232 for networking you may use the flow meter s IDN as its network address and use W extended command set as the communication protocol The current loop output and OCT output can be used to control analogue based or stepper based valve openness and the relay output can be used to turn on and off other devices The four channel analogue inputs can be used to input pressure temperature and other signals In brief complete flow measurement or thermal energy measurement RTU The maximum transmission distance is 15m for RS232C and 1000m for RS485 If longer distance is needed current loop MODEM GSM can serve the purpose All the flow meter operations can be made on a remote computer except the modification of IDN which can only be done locally through the flow meter s keypad The communication protocol is based on master slave principle Master remote computer sends a command slave the flow meter responses the command You may
50. ifications If the Locked M47 Open message is indicated on the bottom line of the LCD display it means that the modification operation is locked out In such cases the user should go to M48 to have the instrument unlocked before any further modification can be made 2 6 Menu Window List MOO MO9 windows for the display of the instantaneous flow rate net totaliser value positive totaliser value negative totaliser value instantaneous flow velocity date time current analogue input values current working status etc M10 M29 windows for entering system parameters such as pipe outer diameter pipe wall thickness liquid type transducer type transducer installation method etc Transducer installation spacing is then calculated according to those parameters and displayed on one of the windows M30 Ma38 windows for flow rate unit selection and totaliser configuration User can use these windows to select flow rate unit such as cubic meter or liter as well as to turn on off each totaliser or to reset the totalisers M40 M49_ windows for setting response time zeroing calibrating the system locking unlocking keypad changing network address ID password etc M50 M89_ windows for digital and analogue outputs such as scheduled output RS232 output relay output analogue current loop output LCD frequency output alarm output analogue inputs Besides there are also windows for configuring analogue inputs date time and
51. ils on M51 26 TDS 100 Ultrasonic Flowmeter Ver 7 50 3 16 How to use 4 20mA current loop output The accuracy of the current loop output is better than 0 1 It can be configured to different mode such as 4 20mA mode 0 20mA modem etc Mode selection can be made in menu M55 Refer to the next chapter for details on M55 In order to use the 4 20mA output function you need not only select the mode to be 4 20mA in M55 but also set the flow rate values which correspond to the minimum current 4mA and the maximum current 20mA Enter the two values in M56 and M57 Example A flow rate range is 0 500m3 h Just enter 0 in M56 and 500 in M57 Example B flow rate range is 500 0 1000ma h If flow direction is not an issue for you you may select 20 4 20mA mode in M55 Then enter 500 in M56 and 1000 in M57 If flow direction is an issue you may select 0 4 20mA mode in M55 This means that the current loop will output 0 4mA when flow rate is negative and 4 20mA when flow rate is positive Enter 500 in M56 and 1000 in M57 You may need to calibrate and test the current loop output before using it Just go to menu M58 and do the following First connect an ammeter to the current loop output Press Menu 4 8 then ENT to enter into menu M58 Use and to display OmA 4mA 8mA 16mA 20mA orderly record the corresponding reading on the ammeter Calculate the differences between the readings and the
52. imal Decimal ASCII Key code Key code Code FEES MENU 3CH OCH Hexadecimal Key code 6 3 4 Programming Examples Example 1 VB requests the instantaneous in second flow rate VB Code mscom1 input das vbcrif Example 2 VB requests the 4321 flow meter to return the following data with checksum a instantaneous flow rate b instantaneous flow velocity c Positive totaliser value d Heat totaliser value e Al1 input current f Al2 input current VB Code mscom1 input W4321PDQD amp PDV amp PDI amp PDIE amp PBA1 amp PAI2 vbcrif Example 3 VB requests to change the pipe OD to 345mm VB Code mscom1 input M lt VBCRLF M1 VBCRLF M1 VBCRLF M3 VBCRLF M4 VBCRLF MS VBCRLF M VBCRLF Note that M lt represents the MENU key M represents the ENT key M1 represents the 1 key 54 TDS 100 Ultrasonic Flowmeter Ver 7 50 7 Measurements of thermal and Other physical parameters 7 1 Introduction TDS 100 series ultrasonic flowmeter is designed with the function of measuring energy which can automatically compute the enthalpy of the corresponding water temperature based on the international standards and thus calculate energy flow and energy accumulation Temperature signals are entered from the analog input hardware Alland Al2of TDS 100 series ultrasonic flowmeter Al1and Al2 can only accept current signal of 4 20mA or 0 20mA
53. in window M78 or M79 Alarm 2 upper threshold setup When flow rate is below this threshold the Alarm 2 OCT circuit or relay will be activated There are two alarming methods OCT and relay User must select the alarming output method in window M78 or M79 40 TDS 100 Ultrasonic Flowmeter Ver 7 50 Buzzer setup If a proper input source is selected the buzzer will beep when the trigger event occurs The available trigger sources are No Signal 9 POS Int Pulse Poor Signal 10 NEG Int Pulse Not Ready 11 NET Int Pulse Reverse Flow 12 Energy Pulse AO Over 120 13 ON OFF via RS232 FO Over 120 14 Fluid Sound Speed Changed Alarm 1 15 Buzzer on when key down Alarm 2 16 Buzzer off Batch Control OCT Open Collector Transistor output setup By selecting a proper triggering source the OCT circuit will close when the trigger event occurs The OCT wiring diagram is shown in Appendix 9 1 The available triggering sources are 0 No Signal 9 POS Int Pulse Poor Signal 10 NEG Int Pulse Not Ready 11 NET Int Pulse Reverse Flow 12 Energy Pulse AO Over 120 13 FO frequency output Alarm 1 15 ON OFF via RS232 Alarm 2 16 Fluid Sound Speed Changed 1 2 3 4 5 FO Over 120 14 FO via RS232C 6 7 8 Batch Control 17 OCT off Relay output setup By selecting a proper triggering source the relay circuit will close when the trigger event occurs The relay is single pole and c
54. indows Valid for the manufacturer only A scientific calculator for the convenience of field applications All the values are in single accuracy All the mathematic operators are selected from a list The calculator can be used while the flow meter is conducting flow measurement 44 TDS 100 Ultrasonic Flowmeter Ver 7 50 5 Troubleshooting The flowmeter series flow meters utilized high reliability design thus their malfunction probability is quite low However due to improper settings harsh environment or misusage problem could occur Therefore flowmeter is equipped with a complete set of self diagnosis functions The errors are displayed in the upper right corner of the menu window via identification code in a timely order Hardware self diagnosis is conducted every time when power is on Some errors can even be detected during normal operation For those errors undetectable due to incorrect settings or improper testing conditions the flow meter will also display useful information to help the user to quickly debug the error and solve the problem There are two types of errors one is hardware error another is operational error Details are presented in the following sections Power on Errors When powered on the ultrasonic flow meter automatically starts the self diagnosis process to find if there are any hardware and software problems If a problem is identified an error message will be displayed The following table show
55. ions Error ee on il Causes code System Normal Normal No eror o error 1 Unable to receive signal EE Polish the pipe surface and improperly 2 Make sure the couplant is 3 Loosen contact or not enough enough couplant between 3 Make sure the transducer is in transducer and pipe tight contact with pipe surface No Signal surface 4 Check the transducer cables 4 Pipe liners are too thick or 5 Check installation parameter the deposition inside of the settings pipe ts teo uie 6 Find a better measurement properly connected no deposition J Hardware Error Hardware problem Contact the manufacturer Poor signal detected Similar to error code Poor Sig Detected Similar to error code 4 20mA loop output over 1 Ignore it if current loop output 120 is not used Current Loop Over 2 Check current loop settings in Improper settings for current 20mA M56 loop output 3 Confirm if the actual flow rate is too high 1 The frequency output is 1 Ignore it if frequency output is 120 over not used 2 Check the values entered in window M66 M67 M68 and M69 3 Use a larger value in M69 if needed 4 Confirm if the actual flow rate is too high 2 Improper settings for Frequency Output frequency output Over 3 The actual flow rate is too high 46 TDS 100 Ultrasonic Flowmeter Ver 7 50 System RAM Error 1 Temporary problems with 1 Reboot the system Date Time Error RAM RTC 2 Conta
56. ipe materials and standard liquids the sound speed values have already been programmed into the flow meter therefore there is no need to enter them again 3 Liner material its sound speed and liner thickness if there is any liner 4 Liquid type for non standard liquid the sound speed of the liquid should be entered 5 Transducer type 6 Transducer mounting methods the V method and Z method are the common methods 7 Check the transducer distance displayed on window M25 and install the transducers accordingly Example For standard commonly used pipe materials and standard commonly measured liquids the parameter configuration steps are as following 1 Press keys MEV to enter into M11 window Input the pipe outer diameter through the keypad and press key 2 Press key to enter into M12 window Input the pipe thickness through the keypad and press ENT key 3 Press key YL to enter into M14 window Press key to get into the option selection mode Use keys and Y to scroll up and down to the proper pipe material and then press key 4 Press key to enter into M16 window Press key to get into the option selection mode Use keys and to scroll up and down to the proper liner material and then press key Select No Liner if there is no liner 5 Press key to enter into M20 window Press key to get into the option selection mode Use keys and to scroll up and down to the proper liquid and then
57. l transducer is characterized by easy installation and high accuracy measurement When ordering customers need to provide the actual parameters of the pipe The parameters of the transducer have been put into the flowmeter and there is no need to input them when installing There are two types of pipe transducers for selection 1 T type transducer DN15 DN40MM 2 Standard pipe transducer DN50 DN6000MM Parameters T type transducer Standard pipe transducer Material Stainless steel Carbon steel stainless steel is optional Pipe size DN15 DN40MM DN50 DN6000MM Connection Flange type Flange type Application of temperature 40 C 160 C Protection class IP68 can work in water and water depths3 meter Rated pressure please refer to following table dimension please refer to following table Nominal Rated Pl type Standard pipe Flange dimension mm diameter m pressure Flan ge L1 L2 D D1 D2 f N m Mpa thickness 15 320 95 65 46 2 14x4 14 20 360 105 75 56 2 14x4 16 25 2 5 390 115 85 65 3 14x4 16 32 450 140 100 76 3 18x4 18 40 500 150 110 84 3 18x4 18 50 1 6 200 165 125 99 3 18x4 20 65 200 185 145 118 3 18x4 20 80 225 200 160 132 3 18x8 20 100 250 220 180 156 3 18x8 22 125 250 250 210 184 3 18x8 22 20 TDS 100 Ultrasonic Flowmeter Ver 7 50
58. ld have a value between 0 and 65534 except 13 0DH 10 OAH 42 2AH 38 26H amp For example if you want to visit the instantaneous flow velocity of device IDN 12345 the following command should be sent to this device W12345DV CR The corresponding binary code is 57H 31H 32H 33H 34H 35H 44H 56H ODH 4 Command binder amp The amp command binder or connector can connect up to 6 basic commands to form a longer command so that it will make the programming much easier For example assume we want device IDN 4321 to return the flow rate velocity and POS totaliser value simultaneously The combined command would be W4321DQD amp DV amp DI CR and the result would be 1 234567E 12m3 d CR 3 1235926E 00m s CR 1234567E 0m3 CR 6 3 3 Codes for the keypad The protocol provides the capability of virtual key pressing A remote RS 232C terminal can send an M command along with a key code to simulate the scenario that the key is pressed through the keypad of the flow meter This functionality allows the user to operate the flow meter in the office far away from the testing site For example the command M1 is sent to the flow meter through the RS 232C link the flow meter will treat the command as if the user has pressed the 1 key through the keypad The ASCII codes and corresponding key values of the keypad keys are listed in the following table 53 TDS 100 Ultrasonic Flowmeter Ver 7 50 Hexadec
59. loop CL mode Available options 0 4 20mA Output Mode set up the output range from 4 20mA 1 0 20mA Output Mode set up the output range from 0 20mA 2 RS232 controls 0 20mA set up to control by Serial Port 3 Turn off the current loop turn off the current loop to save battery life Default 4 20 4 20mA Mode set up the output range from 20 4 20mA 5 0 4 20mA Mode set up the output range from 0 4 20mA 6 20 0 20mA Mode set up the output range from 20 0 20mA 7 4 20mA Corresponding Velocity set up the current loop output range from 4 20mA 8 4 20mA Corresponding Heat Flow set up the current loop output range from 4 20mA The output current value is controlled by sending a parameterized command to the flow meter through its RS232 serial port The command formats are explained in chapter 6 Example if you want to output a 6mA current through the current loop you need to select mode O 20mA Via R 232 in menu M55 and send command A06 CR to the flow meter This function allows the flow meter to control valve openness Other different current output characteristics are illustrated in the following figures The user can select one of them according to his actual requirements The minimum and maximum values indicated in the figure are those set in menu windows M57 and M58 In the 4 20mA and 0 20mA modes the minimum and maximum can be a positive or negative flow value as long as the two values are not the same In t
60. mething is abnormal please contact us immediately and do not proceed with the installation 2 2 Power Supply TDS 100 main unit has three types of power supply AC220V DC8 36V or AC7 30V Please confirm the power supply of your flowmeter when ordering Generally it is AC220V if you need an AC110V supply please indicate it when booking Warning lf the main unit powered by DC or low voltage AC DC8 36V or AC7 30V but connected to AC220V flowmeter will be burned For DC power supply there is no need to distinguish between positive and negative for the polarity reversal is designed in internal circuit 2 3 Wiring Diagram and Outline Drawings TDS 100F 1 Outline diagram it ot eon 251mm 290mm 105mm 265mm m x p 195mm TDS 100 Ultrasonic Flowmeter Ver 7 50 TDS 100FS Outline diagram Wiring diagram Analog input AC power input Analog input UORNOOUUOS ERNAN worsauU0d s mod aur d o d 5 72 _ N 10 TDS 100 Ultrasonic Flowmeter Ver 7 50 2 4 Keypad The keypad of the flow meter has 16 keys Figure 1 Keys 0 9 and L are keys to enter numbers Key is the going UP key when the user wants to go to the upper menu window It also works as key when entering numbers Figure 1 Keypad Key Y is the going DOWN key whe
61. mum and maximum temperature values which correspond to the minimum current 4mA and maximum current 20mA of channel Al2 Menu window M84 thermal unit selection KCAL s Kilocalories second GJ s Giga Joules second Menu window M85 temperature source selection 0 temperature from input Al1 and Al2 1 fixed difference When selecting fixed difference enter the difference in this menu Menu window M86 specific heat or thermal capacity coefficient input Menu window M87 thermal totaliser on off switch Menu window M88 thermal totaliser multiplier factor Menu window M89 thermal totaliser reset Note that if the fluid temperatures at both supply and return points are stable you may choose not to use temperature transmitters Instead you can directly enter the temperature difference of the two points on menu window M85 7 4 Configure Analogue Measurement Ranges Temperature pressure and other signals are entered into the flow meter through analogue channels Al1 Al4 Their measurement ranges can be set on windows M63 M66 The first number of these windows is the minimum of the measurement range corresponding to an analogue input of 4mA The second number is the maximum corresponding to 20mA input current Example 1 assume a temperature transmitter provides 4mA at 10 C and 20mA at 150 C And this transmitter is connected to channel Al1 Then you need to enter 10 and 50 at menu window M63 for the 56 TDS 100 Ultrason
62. n To disable this function just select OFF in menu M83 Refer to the next chapter for M83 details and how the uncounted flow is estimated 3 30 How to use the Working Timer Use the working timer to check the time that has passed with a certain kind of operation The working timer value is displayed in window M72 To reset the timer press key and select YES 3 31 How to use the manual totaliser Use M38 for the manual totaliser setup Switch to M38 Press key to start and stop the totaliser This function can be used for flow meter calibration 3 32 How to use the batch process controller The flowmeter has a batch process controller built in It can be used for flow quantity control or the batching of specific volumes This batch controller utilizes the keypad or the rising edge or falling edge of an analogue input signal as its control signal input or triggering signal It utilizes the OCT or relay as its output When using analogue as the input signal the input current must be larger than 2mA to indicate a logic 1 and OmA to indicate a logic 0 The user needs to select the type of input control signal in menu M80 The user also needs to select the 31 TDS 100 Ultrasonic Flowmeter Ver 7 50 output type to be item 8 output as batch controller in M78 for OCT output or in M79 for relay output Use M81 to enter batch value After completion the display will be in batch control mode and the batch contr
63. n the user wants to go to the lower menu window It also works as the key when entering numbers Key lt is the backspace key when the user wants to go left or wants to backspace the left character that is located to the left of the cursor Key is the ENTER key for any input or selections Key MENU is the key for the direct menu window jump over Whenever the user wants to proceed to a certain menu window the user can press this key followed by a 2 digit number The MENU key is shortened as the M key hereafter when referring to menu windows Key pressing induced beep sound can be enabled disabled in menu window M77 2 5 Menu Windows The flowmeter user interface comprises about 100 independent menu windows that are numbered by Moo M01 M02 M99 M 0 M 1 etc There are two methods to visit a menu window 1 Direct jump in Simply press the MENU key followed by a 2 digit number For example if you want to visit menu window M11 for pipe outer diameter press the following three keys consecutively MENU 1 Mm 2 Press the or key Each time of the key pressing will lead to the lower numbered menu window For example if the current window is on M12 the display will go to window M11 after the key is pressed once You do not need to remember all the menu windows Just remember the most commonly used window numbers and the approximate window number of some uncommonly used windows would be sufficient
64. o install the transducers Make sure you have enough spatial space for easy operation 2 8 2 Meter well construction requirements Should the transducers be installed in meter wells there shall be enough installing space for an operator to stand In order to do this the distance between the pipe and the wall shall be more than 550mm i e width W gt D 550 2 mm cement pipeline width W gt D 700 2 mm and meter well axial width L gt D 1200mm Avoid to install the transducers at sections with valves welding lines and reducers they should be installed within the range of 45 of axis horizontal position 2 8 3 Transducers Installation 2 8 3 1 Clamp on transducer installation The transducers used by the flowmeter series ultrasonic flow meter are made of piezoelectric crystals both for transmitting and receiving ultrasonic signals through the wall of liquid piping system The measurement is realized by measuring the travelling time difference of the ultrasonic signals Since the difference is very small the spacing and the alignment of the transducers are critical factors to the accuracy of the measurement and the performance of the system Meticulous care should be taken for the installation of the transducers Clamp on transducer installation steps 1 Locate an optimal position where the straight pipe length is sufficient see the previous section and where pipes are in a favourable condition e g newer pipes with no rust
65. o the device which is supposed to use the frequency output signal 3 19 How to use the Totaliser Pulse Output The flow meter is able to produce a pulse output every time when it reaches a unit flow of liquid This pulse could be used by an external pulse counter to accumulate the flow rate The totaliser pulse output can only be transmitted through OCT or relay devices Therefore it is necessary to configure the OCT or relay This can be done in menu M78 and M79 Refer to the next chapter for detail on M78 and M79 For example assume that we need to output the POS totaliser through the relay in pulse form and every pulse represents 0 1cubic meter of liquid flow The following steps must be performed 1 Select the Cubic Meter m3 unit in window M32 2 Select the Multiplier factor as 2 X0 1 in window M33 3 Select the output option 9 POS INT Pulse in window M77 INT stands for integrated or totalized Note that the totaliser pulse must be set properly It should be neither too large nor too small If it is too large e g long period the output pulse will be very slow If it is too small e g short period the relay may activate too frequently and its lifetime may be shortened Besides pulse loss error may occur It is recommend to be within 1 60 pulse minute You can adjust the pulse period by selecting different totaliser multiplier factor in M33 3 20 How to produce an alarm signal There are two types
66. of hardware alarms that are available with this instrument One is the audible alarm and the other is the ON OFF output signal which can drive an alarm The audible alarm is also called Buzzer It is generated internally and can be configured in M77 The ON OFF output signal is generated through the OCT or relay output which is connected to an external alarm circuitry The triggering sources of the alarming events for both the Buzzer and the ON OFF alarm signal could be 1 There is no receiving signal 2 The signal received is too weak 4 The flow direction is changed 1 2 3 The flow meter is not in normal measurement mode 4 5 Overflow occurs at the analogue outputs by 120 or more 6 6 Overflow occurs at the frequency output by 120 or more 28 TDS 100 Ultrasonic Flowmeter Ver 7 50 7 The flow rate is out of the specified range which is configured in windows M73 and M74 for Alarm 1 and in windows M75 and M76 for Alarm 2 Example A assume we need the Buzzer to start beeping when the flow meter is not ready in normal measurement Switch to M77 select item 2 Abnormal Measurement State Example B assume we need the Buzzer to start beeping when the flow rate is less than 300 m3 h and greater than 2000m3 h The following setup steps would be recommended 1 Enter flow rate lower limit 300 in M73 for 1 alarm 2 Enter flow rate upper limit 2000 in M74 for 1 alarm 3 Select item 6 Alarm
67. oller is waiting for triggering signal If you selected 0 Key Input as the triggering source in M80 you may press the key to start the batch process Otherwise just wait the specified triggering event is detected Refer to the next chapter for M80 and M81 details 3 33 How to calibrate the analogue output In general there is no need to calibrate the analogue output since it has been calibrated in factory However when conducting current loop calibration see 3 16 if you find the current value shown in M58 differs from the actual current shown in the ammeter you do need to recalibrate the analogue output Calibration steps First put the flow meter into calibration mode Press WENU 8 2 ENT enter password 4213068 and press again Then connect a precise ammeter to the current output loop Press MET to calibrate the current loop 4mA output Read the ammeter If the reading is not 4mA use a Jor to adjust the output current until the ammeter reads 4 00mA Press again to calibrate 20mA output similar to the above step Press ENU W 6 to save the results in the internal non volatile EEPROM 3 34 How to check the ESN Each product of the flowmeter series has a unique electronic serial umber ESN to identify itself The user can use the ESN for instrumentation management The ESN is displayed in window M61 Use M 1 to view the total working time since the instrument left the factory Use M 4 to
68. on pipes of carbon steel or stainless steel by welding while for those pipes of materials like cast iron glass fiber reinforced plastic PVC and cement which cannot be welded directly special hoops should be used for installation For those users who are in similar situation please inform us of the precise out diameter of the pipe to be installed to prevent leakage Installation tools Special hole drilling positioning tools contact factory 500w handle rotary drill high speed adjustable is preferable spanner and screwdriver are needed for installing insertion wetted transducers Hole drilling tools lnstallation Spacing Insertion wetted transducers spacing is calculated based on the distance between the centers of the two sensors along the pipe axis The spacing will be shown on menu M25 when necessary data are put into the menu and the transducers should be installed according to this spacing lnstallation method There is only one way to installing insertion wetted transducers which is called Z method installation and can be applied for all pipes whose diameter is more than DN80mm lnstalling point positioning Input pipeline parameters on the main unit the installing spacing L L inside diameter 9 113mm will be calculated Then two sensors installing potions can be worked out the two sensors must in the same axis plane the installing spacing should be distance between the centers of the two sensors A M
69. onstant on The available triggering sources are 0 No Signal 9 POS Int Pulse 1 Poor Signal 10 NEG Int Pulse 2 Not Ready 11 NET Int Pulse 3 Reverse Flow 12 Energy Pulse 4 AO Over 120 13 ON OFF via RS232 5 FO Over 120 14 Fluid Sound Speed Changed 6 Alarm 1 15 Relay off 7 Alarm 2 8 Scheduled Output 41 TDS 100 Ultrasonic Flowmeter Ver 7 50 The relay output is a single pole single throw SPST always on type drive Its maximum operating frequency is 1Hz Its load current is 1A at 125VAC or 2A at 30VDC For batch process controller Select the triggering signal of the internal batch process controller 0 Key ENT down 4 Al2 Falling Edge 1 Al1 Rising Edge 5 Al3 Rising Edge 2 Al1 Falling Edge 6 Al3 Falling Edge 3 Al2 Rising Edge 7 Al4 Rising Edge For the input analogue current signal OmA indicates 0 and 20mA indicates 1 For batch process controller Set the flow batch value dose M81 and M80 should be used together to configure the internal batch process controller View the daily monthly and yearly totaliser values The flow total data of the last 64 days last 64 months and last 5 years are saved in memory Use f this should be the UP arrow orit to display them The first line on the screen has a dash line Be aware if there is other letter after the dash line If a G appeared the system gained was adjusted automatically at least once This could ha
70. ppen when the flow meter was offline once on that day If a H appeared poor signal was detected at least once It indicates that there was interference or the installation was not good Refer to the next chapter for diagnosis information Automatic Amending function for automatic offline compensation Select YES to enable this function select NO to disable it When the function is enabled the flow meter will estimate the average flow uncounted or lost during the offline session and add the result to the totaliser The estimation of the uncounted flow is made by computing the product of the offline time period and the average flow rate which is the average of the flow rate before going offline and the one after going online Set the thermal energy unit Select temperature source 0 temperature from input Al1 and Al2 1 fixed difference When selecting 1 fixed difference you need to enter the temperature difference in this window Select the specific heat value 42 CTS 100 Ultrasonic Flowmeter Ver 7 80 O O OZO O 100 Ultrasonic Flowmeter Ver 7 50 Energy totaliser switch Set energy multiplier factor Reset energy totaliser Display the signal strength S one for upstream and one for downstream and signal quality Q S Q and R see M91 are the so called installation triplet They are the key criteria for justifying whether an installation is bad operational or optimal
71. resent output of the current loop circuit Re calibration is needed if the displayed value differs significantly from the actual output value measured with an ammeter Set up system date and time Press for modification Use the dot key to skip the digits that need no modification Display software version information and Electronic Serial Number ESN that are unique for each series flow meter The user can use the ESN for instrumentation management RS 232 configuration All the devices connected with RS232 link should have matched serial configuration The following parameters can be configured Baud rate 75 to 115 200 bps parity data bits and stop bit Al1 value range Used to enter the temperature press values corresponding to 4mA and 20mA input current The displayed values have no unit so that they can represent any physical parameters Al2 value range Used to enter the temperature press values represented by 4mA and 20mA input current Al3 value range Used to enter the temperature press values represented by 4mA and 20mA input current Al4 value range Used to enter the temperature press values represented by 4mA and 20mA input current 39 CTS 100 Ultrasonic Flowmeter Ver 7 80 O O O OZO OZO O 100 Ultrasonic Flowmeter Ver 7 50 Window to set up the frequency range lower limit and upper limit for the frequency output function Valid values 1Hz 9999Hz Factory default is 1
72. s Keypad 4x4 key membrane keypad with tactile feedback Input Five channel 4 20mA current inputs for signals such as temperature pressure liquid level and etc Accuracy 0 1 Two of the five input channels are wired to terminal blocks The remaining three channels are optional Outputs Analogue output 4 20mA or 0 20mA current output Impedance 0 1kQ Isolated OCT output for frequency output 0 9 999Hz alarm driver or totaliser pulse output ON OFF control etc Relay output 1A 125VAC or 2A 30VDC For ON OFF control alarm driver z totaliser output etc S Internal Alarm Buzzer user programmable Z External Alarm Driver alarm signal can be transmitted to Relay or OCT output terminals to drive an external alarm RS 232 serial port Others Capable of offline compensation for flow totaliser automatic manual selectable Self diagnosis Automatically record the following information e The totaliser data of the last 64 days 64 months 5 years e The power on time and corresponding flow rate of the last 64 power on and off events Allow manual or automatic flow loss compensation e The instrument working status of the last 64 days Power AC 220V DC 8 36VDC or AC7 30V Power lt 2W Consumption Work time Continuous Environment 30 C 80 C Temperature Environment 85 RH TDS 100 Ultrasonic Flowmeter Ver 7 50 run OE oa IP65 NAME 4X Class Weight F1 2 5kg
73. s iscenirao E ee Re Re ee ee ee 25 TDS 100 Ultrasonic Flowmeter Ver 7 50 3 7 How to reset the totalisers c s ccdcsssieiscesscoctesscousessasesseeacseanvescanestenccuraivvcccdvvevscsvansascdevtenasdeeencnasectennsieente 25 3 8 How to restore the factory default setupS esse eee eee 25 3 9 How to use the damper to stabilize the flow rate eee 25 3 10 How to use the low flow cut off FUNCTION ee se se ke ee Re RA Re GR AA Re Re GR ee ee Re Re ee ee Re 25 3 11 How to conduct Zero Calibration sss 25 3 12 How to change the scale factor sese eee 26 3 13 How to use the password locker sees 26 3 14 How to use the keypad Hee oo ese ee se Re ee Re RA ee GR Re ee Re a ee Re Re ee ee Re 26 3 15 How to use Scheduled data outDU sese 26 3 16 How to use 4 20mA current loop QuLIpUL sese 27 3 17 How to output analogue voltage signal eee eee 27 3 18 How to use the Frequency Output ees sees see se ee Re ee Re Re Re ee Re Re Re Ge Re GR ee ee Re Re ee ee ee 27 3 19 How to use the Totaliser Pulse OUOUL eee 28 3 20 How to produce an alarm signal ees sesse eee 28 3 21 How to use the built in BUZZED oo ee ese se se ke ee Re GR Re Ge Re Re Ge Re GR ee ee ee Re GR ee ee Re Re ee ee ee 29 3 22 How to use the OCT output is ese SEL see GER ED ee Se Ke GER Ek Gee Gee beg Sk GARS ee Ge Ee ED Gebed ee eek seke de 29 3 23 How to use the relay OUtDU iese see ese ee ee Re AA ee Re Re Re ee Re Re ee Re
74. s pipe size fluid viscosity installation variation etc It is therefore recommended to do on site calibration when accuracy is of crucial importance 3 13 How to use the password locker The password locker provides a means of preventing inadvertent configuration changes or totaliser resets When the system is locked the user can still browse menu windows but cannot make any modifications on the windows The password locking unlocking is done in window M47 The system can be locked without a password or with a password consisted of 1 to 4 digits For no password locking unlocking just press key in window M47 If the password is forgotten please contact the manufacturer 3 14 How to use the keypad locker First switch to the menu window which will be displayed after the keypad is locked Then press WeENU 4 8 to switch to menu M48 Press and enter a 1 8 digit long password Password should be numerical only Press again to set the password The system will return to the previously selected window automatically 3 15 How to use scheduled data output Data can be sent to RS232 serial port by a preset schedule The data items to be output are selected in M50 Switch to menu M50 select ON followed by data items then press If you do not want to output data through RS232 select OFF in M50 and press ENT The output time interval and last period are set in window M51 Refer to the next chapter for deta
75. s the possible error messages the corresponding causes and their solutions Hardware self diagnosis errors and solutions Causes Solutions 1 Reboot the system ROM Parity Error y 2 Contact the manufacturer ROM operation illegal error 1 Reboot the system 2 If problem persists press ENT key to restore the factory default configuration Stored Data Error User entered parameters lost SCPU Fatal Error SCPU hardware fatal error System Clock Slow or Fast Error Problem with the system clock or the crystal oscillator CPU or IRQ Error Problem with CPU or IRQ hardware System RAM Error Problem with RAM chip 1 Reboot the system 2 Contact the manufacturer Time Date Error Problem with date time chip 1 Initialize the calendar in menu window M61 2 Contact the manufacturer No Display Erratic or Abnormal Operation Problem with wiring Double check wiring connections No response to pressing key Keypad is locked Bad plug connection Unlock the keypad Reboot repetitively Hardware problems Contact the manufacturer 45 TDS 100 Ultrasonic Flowmeter Ver 7 50 Working Status Errors The ultrasonic flow meter will show an Error Code a single letter like R etc in the upper right corner on menu windows When any abnormal Error Code shows counter measures should be taken Table 5 2 Working status errors and solut
76. sceiving technologies As shown in Figure 1 the utilizes a pair of ultrasonic transducers which are mounted on the pipe upstream and downstream respectively Each transducer functions as both ultrasonic transmitter and receiver The main unit operates by alternately transmitting and receiving a coded burst of sound energy between the two transducers The transit times in the upstream direction as well as in the downstream 4 TDS 100 Ultrasonic Flowmeter Ver 7 50 direction are measured The difference of the two transit times is directly and exactly related to the velocity of the liquid in the pipe Figure 1 Transit time flow measurement principle Downstream transducer gt MD AT k E Upstream transducer V x EE sin 20 Ty e jen i gt Spacing Where D is the angle between the sound path and the flow direction M is the number of times the sound traverses the flow D is the pipe diameter Tup is the time for the beam travelling from upstream the transducer to the downstream transducer Tdown is the time for the beam travelling from the downstream transducer to the upstream transducer AT Tup Tdown The flow rate is then computed by combining the velocity information with pipe parameters and a scale factor The scale factor is normally determined by calibration in factory Three types of transducers can be used with the main unit the clamp on transducer the insertion wetted transducer and the flow c
77. selected ones For instance when 4mA is selected the actual output current shown on the ammeter is 4 01mA Then the difference is 0 01mA If the differences are not within tolerance calibrate the current loop The present current loop output is displayed in Window M59 It changes along with flow rate change 3 17 How to output analogue voltage signal Connect a 2500hm 0 25W resistor across the two current loop output terminals terminals 21 and 22 This will convert the 4 20mA current signal into 1 5V voltage signal 3 18 How to use the Frequency Output All the flow meters have Frequency Output functionality This frequency output signal which represents the flow rate is intended to connect with other instruments The Frequency Output is totally user configurable Usually four parameters should be configured Enter the lower limit of flow rate in window M68 and the higher limit of flow rate in window M69 Enter the frequency maximum and minimum in window M67 For example assume that the flow rate varies in a range from Oma h to 3000m3 h and the required DI TDS 100 Ultrasonic Flowmeter Ver 7 50 output signal frequency should be in a range from 200Hz to 1000Hz The user should enter 0 in M68 and 3000 in M69 and enter 200 and 1000 in window M67 th Please note that the user needs to select the frequency output option the 13 option FO output in window M78 The user must also make the OCT hardware connection t
78. stance Refer to the next chapter on menu M78 for OCT configuration 3 23 How to use the relay output The relay output is a single pole single throw SPST normally ON output device Its maximum operating frequency is 1Hz Its load current is 1A at 125VAC or 2A at 30VDC 29 TDS 100 Ultrasonic Flowmeter Ver 7 50 The relay output is user configurable and can be configured as an ON OFF type alarm signal or a totaliser pulse signal Its signal is sent to terminals 71 and 72 which can be connected to a remote counter or alarm device Refer to the next chapter on menu M79 for relay configuration 3 24 How to modify the built in calendar The current date and time is displayed in menu M04 in format yy mm dd hh mm ss If this is the first time you run the flow meter please do make sure that the date and time are correct If not please make correction Besides if daylight saving applies in your area you may also need to change the time accordingly To make changes on the date and time press WENU 6 0 to switch to menu M61 and modify the settings Use the dot key to skip over these digits that need no modifications 3 25 How to adjust the LCD Use M70 to adjust the LCD backlight Press MENU 7 O ENT You should see gt on the screen which indicates that the system is ready for modification Use and to select the desired option Always On means that the backlight will remain on always Alw
79. t the flow inside the pipe is standstill No velocity is allowed during this setup process 3 Q Why there is no signal The installation requirements are met pipe is new and pipe material is in good quality A Check the following a Is the installation method suitable for your pipe size b Are the entered installation parameters correct a b c Are the wirings correct d Adequate couplant Transducers are in good contact with pipe e e Is pipe full 47 TDS 100 Ultrasonic Flowmeter Ver 7 50 f Is the transducer distance in consistency with the one shown in M25 g Is transducer head tail in the right direction 4 O How to conduct measurement on an old pipe Heavy scale inside no signal or poor signal detected A a Check if the pipe is full of liquid b Try Z method If the pipe is close to a wall and it is hard to do Z method installation you may work on a vertical or inclined pipe with flow upwards c Carefully select a good pipe section and fully polish clean the installation area of the pipe surface Apply a wide band of couplant on each transducer face Install the transducer properly d Slowly and slightly move each transducer with respect to each other around the installation point until the maximum signal is found Be careful that the new installation location is free of scale inside the pipe and that the pipe is concentric not distorted so that the sound waves do not bounce ou
80. tside of the proposed area e For pipe with thick scale inside or outside try to clean the scale off if it is accessible from the inside Note Sometimes this method might not work and sound wave transmission is not possible because of the layer of scale between the transducers and pipe inside wall 5 Q Why no current in the current loop output A Check if the current output mode is set correct in M55 You need to turn the current loop on in M55 Check the hardware connection open the electronics enclosure check to see if the short circuit terminal near terminal 22 is in place between 1 2 i e Direct Output Mode Note that positions 2 3 are used for Transmitter Mode in which an external power supply is needed for the current loop output 6 Q Why is the current output not correct A a Check if the current output mode is set correct in M55 b Check the upper and lower current settings in M56 and M57 c Re calibrate the current loop Verify the output with M49 7 Q Can the flow meter work normally for a few years without stop under harsh environment where power supply voltage varies widely A Yes The flow meter employed intelligent signal processing algorithms to handle strong interference coming from either power line or radiation It also automatically adjusts itself to the optimal operation status when sound wave strength varies due to changing environment 48 TDS 100 Ultrasonic Flowmeter Ver 7 50 6 Commun
81. uring drilling the drill should work in a low speed to avoid sticking or even drill bit breaking pipeline ball valve base tailor made ball valves positioning drill bit d 19 hole drilling drill seal sheath drill pipe handle rotary drill SaaS Se NS lnserting the transducers Spin the locking nut to a position under the bottom of the transducer and fix the transducer through the screw thread of the tailor made ball valve Open the ball valve when it revolves to the ball valve core and then continue to spin the transducer until the front of it passes the inner wall of the pipe Before the wires are connected the angle of the transducer should be adjusted and the locking nut be fixed 18 TDS 100 Ultrasonic Flowmeter Ver 7 50 1 transducers 2 ball valve base 3 tailor made ball valves 9 4 guiding screw thread 6 7 G o locking nut junction box signal cables Length calculation of the part of transducer into the pipe inner wall Insertion wetted transducer is made through stainless die casting As the transducer s length A and the pipe walls thickness B are known and the length part of transducer left outside the pipe can be measured the length of the inner part of the transducer can be calculated through the formula L A B C 0 Note The values of the length A of different types of transducers are Standard Plug in B A 170mm Standard Plug in C A 220mm and Cement Plug
82. use the Hyper Terminal software in your computer to send commands to and view responses from the flow meter Please refer to your computer s manual on how to configure the Hyper Terminal Note that the COM port settings need to match those in menu window M62 6 1 RS232 Connector Pin out Not used RXD lt TXD gt lt gt DTS N GND DSR l 3 4 5 6 gt 6 1 7 8 9 5V Not used RINGInput for connecting a modem lt Figure 1 RS232 Wiring Diagram 6 2 RS232 Wiring Figure 1 for connecting the flow meter to a remote computer through RS232 Lines 2 and 3 of the connecting cable are crossed over Note that the regular RS232 cable obtained in the stores cannot be 49 TDS 100 Ultrasonic Flowmeter Ver 7 50 used directly You need to make modification according to Figure 6 1 Consult the User s Manual of your computer for RS232 wiring as well 6 3 Communication Protocol The protocol is comprised of a set of basic commands that are strings in ASCII format ending with a carriage CR and line feed LF Commonly used commands are listed in the following table 6 3 1 Basic Commands 0 Return flow rate per day 1 DQD CR d ddddddE dd CR DI CR Return POS totaliser dddddddE d CR 2 L CR Return signal strength and signal quality UP dd d DN dd d Q dd CR Return the percentage of analogue output AO d ddddddE dd CR DC CR Return the present
83. view the total number of times the instrument has been turned on and off since the instrument left the factory 32 TDS 100 Ultrasonic Flowmeter Ver 7 50 4 Menu window details Note 1 It is recommended to practice those menu windows on your flow meter while reading this chapter for the sake of easy understanding Note 2 To quickly switch to a menu window just press MENU followed by the window number a two digit number To move from one window to the next use Al or Y key Menu window Function No Display flow rate and net totaliser value If the net totaliser is turned off in M34 the net totaliser value shown on the screen is the total prior to its turn off Display flow rate and velocity Display flow rate and POS positive totaliser Select the positive totaliser units in menu M31 If the POS totaliser is turned off its value shown on the screen is the total prior to its turn off Display flow rate and NEG negative totaliser Select the negative totaliser units in M31 If the NEG totaliser is turned off its value shown on the screen is the total prior to its turn off Display Instantaneous Caloric and Totalized Caloric Display Analogue Input Al1 Al2 current value and its corresponding temperature pressure or liquid level value Display Analogue Input Al3 Al4 current value and its corresponding temperature pressure or liquid level value System Error Codes Display the working condition and t
84. zontal position The following table shows examples of optimal locations Principles to select an optimal location 1 Pipe must be full of liquids at the measurement site 2 No heavy corrosion of deposition inside of the pipe 3 Must be a safe location 4 The straight pipe should be long enough to eliminate irregular flow induced error Typically the length of the straight pipe should be 15 times of the pipe diameter The longer the better The transducers should be installed at a pipe section where the length of the straight pipe at upstream side is at least 10D and at downstream side is at least 5D where D stands for pipe outer diameter Figure 2 Installation site selection sae Upstream Downstream p Transducer Position L up L dn _ Lup Em L up L up mng e L E Lup l L up Lup oe 14 TDS 100 Ultrasonic Flowmeter Ver 7 50 5 If there are flow disturbing parts such as pumps valves etc on the upstream the straight pipe length should be increased refer to the figure 2 installation site selection The disturbance strength are in the following order low to high Single Bend gt Pipe Reduction Enlargement gt Outflow Tee gt Same Plane Multiple Bends gt Inflow Tee gt Out of Plane Multiple Bends gt Valv

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