Operator`s Manual
Contents
1. Manual RNL Insertion Style Flow Meter RWL Wafer Style Flow Meter IL racine 8635 Washington Avenue Racine WI 53406 3738 USA Racine Federated Inc Racine is a trademark of Racine Federated Inc RV 1 004 Tel 262 639 6770 Toll Free 888 572 2463 TABLE OF CONTENTS PAGE INTRODUCTION m 1 4 00 2 2 M 2 Mechanical eee muss UD ED S 2 Installation 1 2 Flow Meter ennas 7 Electrical Iristall amp tlOn 8 Flow Meter iun TRE ee aA TE toto 8 Pulse Output B CRM 9 9 24 20 MA Terminals 2 0 000 40 0 0 0 e neni sr sek nnns annes nea ase a 9 OPERATING THE 06 11 Basic FLOW Program isiin TO OD EOD 11 Entenngi Programming MO CE 12 IO UN 12 Pipe ID 12 Display FUNGON pe 122. 9 5 Exponent Mulllpligre nettles 13 6 Maximum Fluid Velocity VS Insertion nies 22 HEIC Prone Raw 25 0 23 8 Flow Profile Normalized Br c 23 Pipe 25 LIST OF FIGURES FIGURE TITLE PAGE 1 Back Pressure cutn arde d ee d V c ad a 4 2 Outline Dimensions RWL Series Flow 1 4 5 3 Outline Dimensions Series Flow 2 2 2 6 4 Internal Alignment RWL Series Flow meters 111111111 7 5 Flow meter Terminal 8 6 Load Resistance vs Supply Voltage te l 9 7 Basic 2 2 2 10 8 Receiver and Power Supply Combined 10 9 Separate Receivers and Power Supply sse 11 A20 mMmAAd stment Seturan Em 14 11 Programming 17 APPENDIXES APPENDIX TITLE PAGE A ADDITIONAL INSTALLATION REQUIREMENTS comenetmsssnmssnbsntemsnsmsnmssnssmymasm 18 Introduction s e ae E 18 18 SWIIT Den dite iret IRR ER er
3. 92 2280 TEE 58 20 Gl vio 2500 5900 lem vie 0507 lt 80 5 80 9280 0690 9990 90 0 0 0 2700 600 05 70 05 70 0520 ES SES RES edid sseig PAL 9 Jeddo5 29 FIGURE A6 INSERTION FLOW METER INSTALLED IN A REDUCED PIPE Page 30 racine A division of Racine Federated Inc Limited Warranty and Disclaimer Racine division of Racine Federated Inc warrants to the end purchaser for a period of one year from the date of shipment from the factory that all flow meters electronic accessories and other products manufactured by it are free from defects in materials and workmanship This warranty does not cover products that have been damaged due to abnormal use misapplication abuse lack of maintenance or improper instal lation Racine s obligation under this warranty is limited to the repair or replacement of a defective product at no charge to the end purchaser if the product is inspected by Racine and found to be defective Repair or replacement is at Racine s discretion An authorization number must be obtained from Racine before any product may be returned for warranty repair or replacement The product must be thoroughly cleaned and any process chemicals removed before it will be accepted for return The purchaser must determine the applicability of th
4. OI T 12 13 JT talizer E AL oe ee LI 13 ADDITIONAL SCALING 13 E 13 13 ECC ppp 13 SES MA 13 SEU 20 MA E 13 20 MACAMA o TTE 14 IC c E 14 20 MA AGUS 14 DONA TES ee ee UI 14 PASS WOM Oy TEE 14 Advanced Setup 14 Scale Factor 15 TotalizeriPils8 15 15 Totalizer Functions 16 TROUBLESHOOTING ii oett EE cast 20 Preliminary c A 20 INSERTION DEPTH 22 WARRANTY STATEMENT 30 LIST OF TABLES TABLE TITLE PAGE SSPSCIICALONS E Ei a Sota cesses 3 5 FRANCS e temes tos 4 3 Minimum Piping Requirements Line Resistance for AWG Wire 8 4 Line Resistance for AWG Wire 5
5. n 11 12 12 13 14 15 16 34 9 9 10 10 10 10 10 11 11 12 13 14 36 9 9 9 9 9 9 10 10 10 11 11 12 12 Page 23 Flow Profiling If the purchased flow meter is long enough to be inserted to the far side of the pipe the flow through the pipe may be profiled at various flow rates The goal is to find a point in the pipe that remains a consistent percentage of the average flow rate over a wide range of flow A sample flow profile is shown in Table 7 In this example the flow rate of a 48 inch pipe is measured every six inches across the diameter of the pipe beginning and ending 3 inches from the near and far sides of the pipe The distance in inches from the nearside of the pipe is shown Measurements are taken at a low medium and high average flow In Table 8 the flow rate at each measurement point has been converted to a percentage of the average flow It can be seen that point number three 15 inches from the near side of the pipe reads a consistent 102 percent of the average flow The meter should be placed in this position and the output should be divided by 1 02 to obtain the cor rect reading Flow profiling should be done for all insertion meter installations Reducing the Pipe Diameter To decrease the variation of flow profile the piping can be narrowed at the flow meter as shown in Figure A6 This will smooth the flow and increase the effectiveness of flow prof
6. NOMINAL 2 12 54 Al dimensions arein inches mm All dimensions are in inches mm FIGURE 2 OUTLINE DIMENSIONS FOR RVVL SERIES FLOW METERS Page 5 4 Retracted 9 75 Maximum at Maximum Insertion 4 00 Maximum Retracted 1 1 1 1 1 Maximum 1 Insertion Flow A eee B eee eee 12 00 305 13 125 333 18 83 478 24 00 610 25 125 638 30 83 783 36 00 914 37 125 943 42 83 1088 All dimensions are in inches mm FIGURE 3 OUTLINE DIMENSIONS FOR RNL SERIES FLOW METERS Page 6 FLOW METER INSTALLATION RWL Series Flow meters The RWL Series Flow meters are designed to mount between two ANSI flanges using the appro priate bolts The flow meter should be mounted so its inside diameter is centered inside the pipe See Figure 4 The labeling of the flow direction on the flow meter should be aligned with the flow in the pipe Note Gaskets not provided are necessary between the ANSI flanges Insure that these gaskets are properly installed and do not protrude into the flow stream CAUTION Avoid bending the vortex strut or damaging the transducers during installa tion Do not remove cover plates while unit is operating Note See Appendix A for additional installation information CORRECT INCORRECT Meter Centered In Pipe Meter Not Centered In Pipe O57 med FIGURE 4 INTERNAL ALIGNMENT OF RWL SERIES FLOW METERS
7. ERR EE 18 SONIC NOIS Es m 19 Veloci CODI ee 19 Straight Run Piping Considerations 19 Temperature 4 Pressure Tap Locations 20 Sensor Installation x Ra A RR YE RAE A TERR AA D RR RR ns 20 Insertion Style Sensor Installations 2 2 2 24 4 4 24 1 20 Hot Tap Insertion Flow meter Installation 21 Insertion Depth Calculation 22 ez l 23 Reducing the Pipe Diameter 9 E 23 gie 2 MN e senda es 18 en 18 Fig re A co OE I Tc 19 Figure A4 Hot Tap Installation 21 Figure A5 Insertion Depth 22 Pipe x ee Cree ee 24 INTRODUCTION The RxL series flow meters are designed to provide accurate and repeatable liquid flow measure ment in designated engineering units The flow meters employ a patented ultrasonic technique to measure a form of turbulence created in the flow stream This turbulence know as Von Karman Vortex Street is related to the volumetric flow through the pipe T
8. increase stability of the flow rate read ings Damping values are decreased to allow the flow meter to react faster to changing flow rates Flow 4 mA Setting FLOW 4MA If the 4 20 mA analog output is to be used the flow rate that corresponds to 4 mA must be set If the current selection is correct press the ENTER key once to advance to the next parameter If adjustment is required use the arrow keys to input the correct 4 mA setting The arrow key moves the active digit one place to the right for each press of the key The f arrow key increments the active digit one integer for each press of the key When the correct 4 mA flow rate has been entered press ENTER once to store this value and move to the next parameter Flow 20 mA Setting FLOW20MA If the 4 20 mA analog output is to be used the flow rate that corresponds to 20 mA must be set If the current selection is correct press the ENTER key once to advance to the next parameter If adjustment is required use the arrow keys to input the correct Page 14 20 mA setting The arrow key moves the active digit one place to the right for each press of the key The f arrow key increments the active digit one integer for each press of the key When the correct 20 mA flow rate has been entered press ENTER once to store this value and move to the next parameter 4 20 mA Calibration 4 20CAL The 4 20 mA calibration menu al lows the fine adjustment of the 4 20 mA output The 4 mA sett
9. oro ovo ero oro zeo ww 99 ss vs es 25 ts 05 95 ss vs fes ts os seuoul EE 25519 MS sessej5 puepue3s edid Page 28 2181 760 0 000 8 vv8 9 8700 0007 v18 G 5900 0009 7 87 6900 0005 005 0500 000 6 000 0500 0007 INNNIAN TV 006 0500 000 2 86 0072 600 0500 000 01 0052 0008 98 77 04 0 0020 9298 92178 92178 92178 2907 800 Es Sc9 L 0520 220 orto zero 92979 2 9 52 9 sev9 0520 ogro 98 9 lt 2 5 sers E X S06 1S8 vise 860 0 0 0 Yero 900 005 000 SZ9 929 odid 1eddo2 ONI8N L 43ddOO INNNIIAN TV 290 1967 576 462 ai 6 20 2 00 0600 006 0052 serz 8810 9900 0800 s600 __ 8 82 9297 9297 2907 6007 586 esol Gl 190 8500 0400 esoo GLEZ 424 0097 us 509 bert 05170 2200 0900 200 006 29 1 9 89 L 092 9pL 0 Zv0 0 990 0 00 EM 099 z z 2901 5507 520 5660 42 0 900 0500 00
10. this output is 100 feet Cable Installation To install the cable in the flow meter route the cable through the cable gland located on the elec tronics enclosure The wiring of the other end of the cable will vary depending on the specific installation require ments Figures 7 8 and 9 show the wiring diagram for variations of flow meter installation The flow meter s 4 position terminal strip provides all the connections needed to operate the flow meter 4 20 mA Terminals The 4 20 mA terminals are used for the flow meter s power supply This power supply should be 10 to 30 VDC and be capable of supplying 25 mA to the flow meter Because this meter has a built in display no additional wiring is necessary for basic operation See Figure 7 Page 10 10 30 VDC POWER SUPPLY 2 CONDUCTOR SHIELDED CABLE L7 7 7 X7 C C C CURRENT OUTPUT 2 WIRE HOOKUP STAND ALONE POWER SUPPLY FIGURE 7 EXAMPLES OF RNL AND RWL FLOW METER HOOKUPS LOOP POWER BASIC CONFIGURATION 4 20 mA RECEIVER 2 CONDUCTOR SHIELDED CABLE Z 7 Z Z X7 X7 A C C C C CURRENT OUTPUT 2 WIRE HOOKUP RECEIVER AND POWER SUPPLY COMBINED FIGURE 8 EXAMPLES OF RNL AND RWL FLOW METER HOOKUP LOOP POWER RECEIVER COMBINED WITH POWER SUPPLY If the current loop is used to transmit data the receiving device may also be the current source for the instrument See Figure 8 Finally the device us
11. L Series 2 to 16 FPS 0 61 to 4 9 MPS FLOW RATE MEASURED For RWL Series 2 to 20 FPS 0 61 to 6 1 MPS see applicable FLOW RANGE charts For RNL Series Maximum 250 F 121 C PROCESS TEMPERATURE For RWL Series 20 F 300 F 29 C to 148 AMBIENT TEMPERATURE For RNL Series 20 F to 110 F 29 C to 43 LIMITS For RWL Series 20 F to 150 F 29 C to 66 C For RNL Series Up to 250 PSIG 17 BARg PROCESS PRESSURE For RWL Series Maximum 100 F 300 PSIG 20 BARg Maximum 300 F 200 PSIG 14 BARg MINIMUM BACK PRESSURE See Figure A BACK PRESSURE CALCULATIONS MAXIMUM VISCOSITY 10 centistokes For RNL Series 2 0 of reading ACCURACY For RWL Series 1 0 of reading REPEATABILITY 0 5 of reading RESPONSE TIME 4 20 mA Loop Powered INPUT POWER 10 to 30 VDC 25 mA max 8 digit 75 high numeric display DISPLAY 8 character 38 high alphanumeric 4 20 mA Current loop ANALOG OUTPUT Resolution 1 4000 Transient Overvoltage Category 3 in accordance with IEC 664 Outputs one pulse for each increment of the least significant digit of totalizer Pulse Type Opto Isolated open collector transistor Max Voltage 30 VDC PERSE Pulse Width ON State 20 ms Max pulse rate 25 Hz Current ON State 0 9 V drop 5 0 mA or 0 7 V drop 0 1 mA For RNL Series NEMA 4 rated electronics housing Stainless steel w PPS transducer assembly Standard 2 ANSI 150 Ib flange Optional 300 Ib flange or N
12. PT x 2 NPT Bushings For RWL Series NEMA 4 rated electronics housing Flange Compatibility ANSI 150 300 600 Ib flanges DN 25 40 50 80 flanges Operating Temperature 22 F 30 to 158 F 70 C ENVIRONMENTAL Humidity 0 90 Non condensing CONSTRUCTION Page 3 TABLE 2 FLOW RANGES NOMINAL GALLONS PER MINUTE GPM LITERS PER MINUTE LPM SIZE INCH mm RNL Series RWL Series 1 0 25 142 1 5 40 350 2 0 50 568 3 0 80 1 402 BASED ON WATER AT 1 CENTISTOKE AT 73 F SCHEDULE 40 PIPE 1 TO 20 FPS 0 3 TO 6 MPS FOR REFERENCE ONLY CONSULT RACINE FEDERATED SIZING PROGRAM FOR TEMPERATURE AND PRESSURE CONDITIONS OTHER THAN THOSE LISTED HERE BACK PRESSURE CALCULATIONS At high flow rates cavitation may occur causing a flow meter to be inaccurate Cavitation can be prevented by increasing the back pressure The following equation determines the minimum back pressure required to prevent cavitation P 2 P 0 03 VP where P line pressure at the meter PSIA vapor pressure of the liquid PSIA V line velocity FPS EXAMPLE In water at 65 F flowing with a speed of 25 fps the vapor pressure is 0 3 PSIA P1 0 3 0 03 25 19 05 PSIA If atmospheric pressure is 14 69 PSIA Then P1 19 05 PSIA 14 69 PSIA 4 36 PSIG Maintaining a back pressure of 5 PSIG or greater will prevent cavitation FIGURE 1 BACK PRESSURE CALCULATIONS Page 4 Raised Surface C Dia Both Sides
13. R key once The monitor now shows the display mode currently in effect If the current selection is correct press the ENTER key to ad vance to the next parameter To change to an alternate display mode use the arrow keys to scroll to the desired display mode and press ENTER to save the choice A TEST function is also available in the Display Function sub menu With the test function se lected the display acts like a frequency counter and displays the raw input frequency being sup plied to the frequency input terminals The second line of the test screen shows transducer signal strength 2224 40 4 display rate any of the following units VEL FEET If the current selection is correct press the VEL MTRS ENTER key to advance to the next param eter To change to an alternate rate unit use GALLONS the arrow keys to scroll to the desired display LITERS units and press ENTER to save the choice Millions of Gallons MGAL Cubic Feet CUBIC FT ee measurements not available as totalizer Million Cubic Feet M CU FT Cubic Meters CUBIC ME _ Mass units require entry of specific gravity Million Cubic Meters MEGL TRS ACRE FT Oil Barrels 42 GAL OIL BARR Liquid Barrels 31 5 GAL LIQ BARR Page 13 Select The Rate Interval The monitor can display rate Displayed as interval in any of the units listed at the right If the current selection is correct press the ENTER key to advance to the next parameter To change to rate interval HOUR u
14. RNL Series Flow metes The RNL Series flow meters are designed to mount on a standard ANSI 150 Ib 2 pipe flange It is recommended that the customer conduct a flow profile survey and place the probe at the opti mum point The labeling of the flow direction on the sensor should be aligned with the flow in the pipe Maximum insertion depth is a product of pipe size and fluid velocity see Appendix Table 6 for Insertion Depth Chart CAUTION Avoid bending the vortex strut or damaging the transducers during installa tion The torque value for the Conax fitting is 90 100 ft Ibs Note See Appendix A for further information on installation Page 7 TABLE 3 MINIMUM PIPING REQUIREMENTS Minimum Required Upstream Obstruction Straight run Pipe Diam eters Upstream from Meter 90 Elbow Two 90 Elbows Same Plane Two 90 Elbows Different Planes Flow Straightener recommended when ever an axial swirl exists in the flow stream Fully Open Shut off Valve Minimum Required Straight run Pipe Diam eters Downstream from Meter Control Valve Downstream Obstruction Page 8 Electrical Installation TRANSDUCER CONNECTIONS C C CX 2 Label Denoting Receiving XMIT Transducer Cable PULSE OUTPUT LOOP POWER CONNECTIONS FIGURE 5 FLOW METER TERMINAL FUNCTIONS RWL and RNL Series Flow Meters Electrical connections for the flow meter are made using screw type terminals located in
15. TION REQUIREMENTS INTRODUCTION Installing a flow meter is something which requires careful consider ation It cannot just be placed in a line somewhere and be expected to fulfill its purpose adequately The geometry and condition of the pipe runs in the area of the installation must be considered to ensure the best and most accurate operation of the flow meter This appendix provides suggestions for optimum installations Most flow meter manufacturers define installation conditions in terms of upstream and downstream straight pipe lengths from the point of installation Unfortunately this is not the only requirement and one needs to consider other peripheral conditions such as proximity and style of bends and other equipment installed in the line By doing this prob lems of turbulence swirl and sonic noise may be avoided FIGURE A1 TURBULENCE Turbulence is a disturbance of the flow caused by bends and obstructions in the flow stream it is this phenomenon which makes the vortex flow meter work Fortunately turbulence dies out fairly quickly so by positioning the flow meter well away from bends and obstructions this potential problem of measuring flow in turbulent conditions is overcome See Figure A1 SWIRL Unlike turbulence swirl will not die away Once created it will continue until dissipated on the next pipe bend in the system Swirl occurs after two bends in close proximity which are at an angle to
16. e rule of thumb position is 25 of the pipe ID into the pipe but the optimum posi tion can only be obtained by measuring the profile and working out the correct position from that STRAIGHT RUN PIPING CONSIDERATIONS The sensor should be installed with 20 diameters or more of straight unobstructed full area pipe upstream of the flow meter installation and 10 diameters or more downstream This condition provides a fully developed symmetrical flow profile that is necessary to obtain accurate and re peatable results The first obstruction up and downstream should be a full area elbow If the mini mum straight run is not possible the general rule is to have 80 of the straight run upstream and 20 downstream from the flow meter installation High intensity ultrasonic noises should not be located upstream or downstream from the sensor Common ultrasonic noise sources include the following e Slightly cracked valves operating with large pressure drops e Small pipe leaks in high pressure systems e Venturies operating at near sonic flow rates e Sonic nozzles If these ultrasonic noise sources cannot be eliminated the meter should be mounted with at least one elbow between the flow meter and the noise source Page 20 Temperature and Pressure Tap Locations User supplied pressure and temperature sensors should be mounted downstream from the flow meter The pressure sensor should be approximately 3 5 pipe diameters and the temperat
17. e ENTER key once and the first linear point s frequency input will begin to flash FREQ 1 Enter the frequency for the first linear point using the arrow keys When the fre quency value input is completed press ENTER once again to change to the coefficient value for the first linear point At the COEFF 1 prompt enter the coefficient that corresponds to the frequency value previ ously entered Press ENTER once to move to the next scaling point Continue entering pairs of frequency and coefficient points until all data has been entered Page 16 TOTALIZER FUNCTIONS Reset Total To reset the monitor total display in run mode press MENU and ENTER simulta neously until TOTAL RST starts to flash The TOTAL RST will stop flashing and the display will return to run mode at the conclusion of the reset procedure Store Total The current total can be manually stored in the monitors flash memory Press and hold the ENTER key for 2 seconds The display will respond with a flashing TOTALSVD and then start a display test At the end of the test the instrument will return to run mode Automatic Store Total The monitor is equipped with a store total feature that works automati cally saving the current total to flash memory once every ten minutes TROUBLESHOOTING The RxL series flow meters are designed to ensure long term accuracy and reliability The mate rial used for construction and self cleaning strut are specifically designed to withstand the
18. e product for its desired use and assumes all risk in connection therewith Racine assumes no responsibility or liability for any omissions or errors in connection with the use of its products Racine will un der no circumstances be liable for any incidental consequential contingent or special damages or loss to any person or property arising out of the failure of any product component or accessory All expressed or implied warranties including the implied warranty of merchant ability and the implied warranty of fitness for a particular purpose or applica tion are expressly disclaimed and shall not apply to any products sold or services rendered by Racine The above warranty supersedes and is in lieu of all other warranties either expressed or implied and all other obligations or liabilities No agent or representative has any authority to alter the terms of this warranty in any way racine 8635 Washington Avenue Racine WI 53406 3738 USA 262 639 6770 888 572 2463 e mail vortex racinefed com
19. each other When de signing an installation keep the flow meter out of any line which has two adjacent bends upstream See Figure A2 FIGURE A2 Page 19 SONIC NOISE Sonic noise is created by valves either flow control or pressure control valves which are slightly open Like swirl sonic noise will only dissipate on a bend so it is important to install flow meters out of line of sight of valves Sonic noise is caused by liq uid obtaining sonic velocities through a slightly open valve which has a pressure difference across it This noise travels both up and down stream from the valve therefore the flow meter must be installed well away from the valve preferably around a bend See Figure A3 FIGURE A3 VELOCITY PROFILE FOR RNL INSERTION METERS When using an RNL series insertion flow meter it is necessary to consider the effects of the veloc ity profile across the pipe or duct to optimize accuracy In large pipes the flow moves slowly at the pipe walls but is at maximum velocity in the center of the pipe creating a continuously variable velocity across the pipe This velocity variation is called the velocity profile of the pipe and can be measured and plotted by using the insertion flow meter to measure velocities at various noted positions across the pipe As the maximum velocity is in the center of the pipe it follows that if the flow meter is positioned in the center it will not measure av erage flow Th
20. ed to measure the current can be installed in series with the return line as illustrated in Figure 9 This output is a standard 4 to 20 mA output where 4 mA corresponds to no flow and 20 mA indicates 100 full scale flow Page 11 4 20 mA RECEIVER zy 10 30 VDC POWER SUPPLY F 2 CONDUCTOR SHIELDED CABLE RECV XMIT hht ooocooe CURRENT OUTPUT 2 WIRE HOOKUP SEPARATE RECEIVER AND POWER SUPPLY FIGURE 9 EXAMPLE OF RNL OR RWL FLOW METER HOOKUP LOOP POWER RECEIVER AND POWER SUPPLY SEPARATE If the pulse output function is to be used the receiving device must conform to the output param eters as described in the specifications section Attach a cable as describe in to the Pulse output terminal and terminate the other end of the cable at the desired location OPERATING THE MONITOR The monitor has two modes of operation referred to as the RUN mode and the PROGRAM mode Both the run mode and the program mode display screen enunciators confirming the state of the monitor A quick glance at the lower left hand corner of the LCD screen will confirm operating sta tus Normal operation will be in the run mode To access the programming mode press the MENU key once The programming indicator will appear signaling that the display is ready to accept pro gramming inputs After programming the display with the necessary information a lock out feature can be turned on to
21. ength that should be ordered by Siem DANGER Caution should be used when A inserting or retracting at pressures exceed ing 60 PSIG 4 14 BARg FIGURE A4 Page 22 L1 Distance from bottom of flow meter flange to center of vortex strut RNL SERIES m nononnnnon Du IB L2 Distance from bottom of flow meter flange to top inside wall of pipe 1 Find the appropriate L1 distance for your appli cation in the first column 2 Once the L1 distance is identified move across the row until the appropriate L2 distance is lo cated for the application The resulting number is the maximum fluid velocity L1 EXAMPLE L1 length 24 and L2 length 12 The resulting maximum fluid velocity is 13 ft sec Flow FIGURE A5 Table A1 INSERTION DEPTH Maximum Fluid Velocity ft sec L1 L2 INCHES Inches 6 8 10 12 14 16 18 20 22 24 26 28 30 E use un 12 22 241 25 12 21 22 22 16 18 18 19 20 22 18 16 16 17 18 19 22 15 15 15 16 17 18 2 22 13 14 14 15 15 16 17 19 1 24 13 13 13 13 14 15 15 16 1 26 12 12 12 12 13 14 15 16 17 28 11 11 12 12 12 13 13 14 15 17 30 100 10 11 t1
22. factor is 1 00 scale factor is used to correct correlation adjustment or change the flow value displayed on the LCD A correlation adjustment allows the user to force the display to read a flow value different from the factory calibrated value This procedure is only valid for an offset difference In other words the readings must be off by a constant value or percentage for the entire measurement range Totalizer Pulse Output PULS OUT The pulse output parameter can be either enabled or disabled When enabled this output generates a 20 mS duration pulse for every time the least significant digit of the totalizer increments The amplitude of the pulse is dependent on the volt age level of the supply connected to the pulse output and is limited to a maximum 30 VDC Linearization LINEAR Enhanced accuracy can be obtained by linearization of the display The linearization routine will accept a maximum of ten points Linearization requires additional calibration data from the sensor to be used with the monitor Typically calibration information is obtained for three five or ten points Number of Points At the LINEAR prompt press ENTER once The first display number will begin to flash Again the arrow key increments the value and the arrow moves the cursor between digits Enter the number of linear points to be used When the number of points has been input press the ENTER key once to move to the first linear segment Press th
23. he flow meters primary output is a 4 20 milliampere mA current source whose current output is proportional to the flow The secondary output is a pulse train whose frequency is directly propor tional to the flow Each RxL series flow meter is calibrated against flow standards traceable to NIST National Insti tute of Standards and Technology RWL series flow meters are for pipe inside diameters of 1 17 2 and 3 inches The RNL Flow meter is an insertion style retractable flow meter that is installed through a 2 full port isolation valve which permits the unit to be retracted or inserted manually without shutting down the system These flow meters are calibrated in actual volumetric flow rates such as gallons per minute GPM Page 1 INSTALLATION Mechanical Installation The flow meter has been shipped completely assembled tested and ready to install and operate in its permanent location See Figures 2 and 3 for the applicable outline dimensions for the flow meter Installation Location The RxL series flow meters use a combination of ultrasonic and vortex shedding technologies to measure volumetric flow An ultrasonic noise can interfere with this technique therefore high intensity ultrasonic noise sources should not be located upstream or downstream from the sensor Common ultrasonic noise sources include the following 1 Slightly open valves operating with large pressure drops 2 Small pipe leaks in high pres
24. iling Nearly any angle can be used on the down stream side of the meter to restore the original pipe diameter However if the angle of piping is seven degrees or less nearly all the pressure drop caused by the narrow pipe section will be recovered TABLE 7 FLOW PROFILE RAW DATA FLOW FLOW RATE AT MEASUREMENT POINT F S 1 2 4 5 7 8 AVERAGE fts MEDIUM FLOW 5 58 5 91 16 12 16 21 6 24 6 18 16 06 5 70 60 DISTANCE 3 9 15 21 27 33 39 45 INCHES TABLE 8 FLOW PROFILE NORMALIZED DATA 0 FLOW FLOW RATE AT MEASUREMENT POINT 112 3 4 5 7 8 24 Prem a ar a ar ar uoo 31 9215 edid 515512 15 2 Ad 13315 SS3TNIVLS 13315 Page 25 _ a a ar wm a a m a neuen 15 a 9215 edid OvL OZL HDS pO 5135512 GUVGNVLS uddid 13315 5531 15 133165 Page 26 00 02 vc Oc 00702 vc Oc 00702 Oc 00704 92 02 di SECS EC IRE 7 7 ID 55810 9215 sessej5 puepue3s edid 1525 27 0056 9 46 2656 8799 7956 0856 9656 di 9 9L 879 099 999L 229 di 0920 09 1801 250 180 ero svo 250 ww M cisio ns
25. ing is typi cally between 35 and 50 To set the 4 mA value connect an ammeter in series with the loop power supply At the 4 20CAL prompt press EN TER once The display will now show a steady NO indication Press the f arrow key to change to a YES display Press ENTER once to access the 4 mA fine adjustment 4 mA Adjustment 4MA OUT While monitoring the ammeter adjust the 4 mA value to obtain a 4 mA reading The arrow key increments the value and the arrow key dec rements the value When a steady 4 mA read ing is obtained on the ammeter press the Enter key to lock in this value and move to the 20 mA adjustment 20 mA Adjustment 20MA OUT The 20 mA adjustment is preformed using the same proce dure as the 4 mA adjustment 10 30 VDC While monitoring the ammeter adjust the 20 mA POWER SUPPLY value to obtain a 20 mA reading The arrow key increments the value and the arrow key decrements the value When a steady 20 mA reading is obtained on the ammeter press the Enter key to lock in this value and move to the next parameter Z Z VV LU W A A A 4 20 mA Test 4 20TEST The monitor contains a diagnostic routine that allows the simulation of mA values between 4 and 20 to check output tracking At the 4 20TEST prompt the arrow keys change the simulated mA output in increments of 1 mA The ammeter should track the simulated mA output If a 4 20 mA test is not necessary press MENU
26. once to move to the next parameter Password PASSWORD Password protection prevents unauthorized users from changing programming information Initially the password is set to all zeros To change the password press ENTER once at the password prompt The first digit of the password value will begin to flash Us ing the arrow keys as previously described enter the password value Pressing ENTER will store the password and exit to run mode Page 15 Advanced Setup ADV STUP The advances setup menu allows access to entries for applying scaling factors enabling or disabling the pulse output and adding linearization points At the ADV STUP prompt press ENTER once The display will now show a steady NO indication Press the f arrow key to change to a YES display Press ENTER once to access the first param eter Scale Factor SCALE F At the SCALE F prompt press the ENTER key once The current scale factor will begin to flash If the current selection is correct press the ENTER key to ad vance to the next parameter The scale factor is used to force a global change to all variables For example under operating conditions the display is reading a consistent 3 below the expected values at all flow rates Rather than changing all parameters individually the scale factor can be used to compensate for the 3 offset The scale factor would be set to 1 03 to correct the readings The range of scale factors is from 0 5 to 1 5 The default scale
27. pressurizing the line for flow meter maintenance is impossible or undesirable the hot tap method of installation is used This method involves inserting the flow meter through a 2 50 76 mm spool piece and a 2 50 76 mm full port valve and will require a longer shaft length as well as greater clearance space for removal and installation DANGER Caution should be used when inserting or retracting at pressures exceeding 60 PSIG 4 14 BARg Figure A4 shows a sample hot tap installation With 1 the exception of the spool piece which must be a minimum of 6 inches 152 mm in length all of the dimensions are suggestions only Actual dimensions may vary depending on customer s own hot tap con figuration To calculate the insertion flow meter stem length for By Stem the installation it will require t Maximum For pipe diameters less than 24 609 mm Calculate the distance from the center line of the pipe to the top of the flow meter mounting flange Standard ANSI 2 Inch 150 Lb Flange I For pipe diameters greater than 24 609 mm Calculate the distance from the top of the flow me ter flange to a point 74 of the pipe diameter Where a flow profile is desirable calculate the dis tance from the bottom of the pipe to the top of the flow meter mounting flange and subtract 2 50 76 mm Round this distance up to the next largest 12 305 mm increment This is the stem l
28. prevent unauthorized access or changing the meter s setup parameters BASIC PROGRAMMING MODE Keys MENU Switches to PROGRAMMING mode Up Arrow Scrolls forward through the parameters choices and increments numeric variables Right Arrow 9 Scrolls backward through the parameters choices and moves the active digit to the right ENTER Used to save programming information advance to the next programming parameter and in the reset process Modes RUN Normal operating mode PROGRAM Used to program variables into the display Page 12 Entering Programming Mode Change to programming mode by pressing the MENU key once The mode indicator will change from RUN to PROGRAM Select The ID Unit At the ID UNIT prompt press the ENTER key once The current ID inside diameter unit will begin to flash Using the arrow keys choose INCH for US measurements or MM for metric measurements Press ENTER once to save the meters ID Unit choice and advance to the pipe ID selection Select The Pipe ID At the ID prompt press the ENTER key once The current meter ID inside diameter will begin to flash Using the arrow keys enter the pipe inside diameter Press ENTER once to save the pipe ID Note Specification charts for common types of pipes can be found in the appendix of this manual Select The Display Function The monitor can display RATE or TOTAL or alternate between BOTH rate and total At the DISPLAY prompt press the ENTE
29. rigors of industrial environments As a result periodic adjustments or re calibration is not required The following section is intended as a guide to eliminating common problems found with the installation of the flow meters Techni cal assistance is also available directly from Racine Federated who also provides complete re calibration and repair service for the RxL series flow meter at nominal cost PRELIMINARY CHECKS The troubleshooting guide of the next section can be used to help locate problems associated with the RxL series flow meter Before using this guide the following checks should be made 1 Is the flow meter cable installed correctly 2 Is the proper power supplied to the correct terminals 3 Is the flow meter installed with the flow direction arrow aligned with flow in the pipe 4 For insertion style flow meters has the sensor head been inserted to the optimum depth Page 17 44301 Sid WN gt BB gt MAM d 5 Wied 9888 365 L que 1 8888 Loves 11 170 9999 gt 8888 170 one 18888888 c III LL 130 3 7 pej ejes 58110 SON UBYM e qejreAe 930N ABEL AN 1101 3195 SHUN 19218401 104 S3HDNI 404 4 die 89888 88888 lt 1 FIGURE 11 PROGRAMMING FLOW CHART Page 18 APPENDIX A ADDITIONAL INSTALLA
30. se the arrow keys to scroll to the desired interval and press ENTER to save the choice Select the Totalizer Units The flow totalizer unit is used to set the flow totalizer exponent This feature is useful for accommodating a very large accu mulated flow The exponent is a x10n multiplier where n can be from 1 x0 1 to 6 x1 000 000 Table 5 Exponent Display Multiplier should be referenced for valid entries and their influ ence on the display x 1 no multiplier If the current selection is correct press the ENTER key to advance to the next parameter To change to 1 000 rate interval use the arrow keys to scroll to the desired x 10 000 x 100 000 This completes the basic setup for the meter x 1 000 000 Additional Scaling Parameters interval and press ENTER to save the choice Specific Gravity SP GRAV The specific gravity for the fluid being measured must be entered if mass readings are desired The SP GRAV specific gravity prompt will only be displayed when one of the mass Rate Units is chosen Low Flow Cutoff FL C OFF The low flow cutoff is entered as a percentage between maximum flow and minimum flow and influences how the flow meter will act at flows very near zero Gen erally an entry of 2 provides for a stable zero indication When the flow rate drops below the entered percentage value the meters s display will read zero Damping DAMPING The damping value is increased to
31. side the electronics enclosure To expose these terminals open the cover The functions of these terminals are illustrated in Figure 5 Flow Meter Wiring A two conductor cable of 16 to 24 AWG solid or stranded wire is required to make connections to the flow meter It is recommended that a shielded interconnecting cable be used The maximum cable length for the power depends on the supply voltage lines required to drive the flow meter and the current meter being used to monitor the current output of the flow meter The maximum length of the cable is determined by using Figure 6 to calculate the maximum load resistance in Ohms that can be driven using the known power supply voltage In determining this value the voltage drop across the meter being used to monitor the current output of the flow meter must be considered After this value has been found Table 4 can be used to calculate the resistance in the cable being used and adjust the input voltage as required Page 9 TABLE 4 LINE RESISTANCE FOR CURRENT LINES Ohms Ft Related to Wire Size AWG Le 20440 0 01035 OnmFt_ 3 22AWG 0013100hmFt 24AWG 0 02620 OhmFt FIGURE 6 LOAD RESISTANCE VS SUPPLY VOLTAGE Pulse Output The pulse output is a secondary output and is not intended for long transmission The load on the line must be 50 KO minimum and 1 000 picofar ads pf maximum The maximum length of shielded cable that can be attached to
32. sure systems 3 Venturis operating at near sonic flow rates 4 Sonic nozzles If these ultrasonic noise sources cannot be eliminated the meter should be mounted with at least one elbow between the flow meter and the noise source The sensor should be installed with at least 20 pipe diameters of straight pipe upstream and 10 pipe diameters downstream This condition provides a fully developed symmetrical flow profile that is necessary to obtain accurate and repeatable results Shorter upstream downstream piping may be used although a shift in calibration may occur If severe turbulence or distorted flow pro files are present flow straighteners should be used Consult Racine Federated for shorter upstream downstream configurations See Appendix for ad ditional installation information When installing the flow meter in a newly constructed process line a strainer should be installed upstream of the meter to prevent foreign material from damaging the strut or obstructing the flow Excessive damage to the strut could affect the accuracy of the meter In order to prevent cavitation it is important that the required back pressure be maintained The minimum required back pressure varies with temperature See the back pressure calculations in Figure 1 The sensor should be installed using the minimum piping requirements indicated in Table 2 Page 2 TABLE 1 SPECIFICATIONS MEASURED Liquid in pipe from 72 13 mm diameter RN
33. ure sen sor approximately 4 8 pipe diameters downstream Sensor Installation The flow meter is shipped completely assembled tested and ready to install and operate in its permanent location The RWL wafer style flow meters are designed to mount between two ANSI flanges The flow meter should be mounted so its inside diameter is centered inside the pipe The labeling of the flow direction of the flow meter should be aligned with the flow in the pipe Gaskets not provided are necessary between the sensor and the ANSI flanges Insure that these gaskets are properly installed and do not protrude into the flow stream RNL Insertion Style Meter Installation The RNL series flow meter is shipped completely assembled tested and ready to install and oper ate in its permanent location If the main line can be depressurized easily without undue user inconvenience then a simple installation consisting of a 2 51 mm nozzle and a standard ANSI 150 Ib 2 pipe flange may be used This permits the shortest shaft length to be used which keeps clearance space require ments for insertion and removal to a minimum Gaskets not provided are necessary between the sensor and ANSI flange It is recommended that the customer conduct a flow profile survey prior to installing flow meter DANGER Caution should be used when inserting or retracting at pressures exceeding 60 PSIG 4 14 BARg Page 21 Hot Tap Insertion Flow Meter Installation Where de
Download Pdf Manuals
Related Search