User's Guide Series 1.4
Contents
1. 3 0 1 8 4 1 LS 11 5 16 5 29 4 45 9 66 1 90 0 1175 183 6 264 4 470 0 734 4 1057 6 1439 5 1880 2 2379 6 2937 8 4230 4 6610 0 9518 4 12955 6 16921 6 4 0 2 4 5 5 9 8 15 3 22 0 39 2 61 2 88 1 120 0 156 7 244 8 Ep 626 7 979 3 1410 1 1919 3 2506 9 3172 8 3917 0 5640 5 8813 3 12691 2 17274 1 22562 2 5 0 cm 6 9 12 2 19 1 27 5 49 0 76 5 110 2 149 9 195 9 306 0 440 7 783 4 1224 1 1762 7 2399 2 3133 6 3966 0 4896 3 7050 7 11016 7 15864 0 21592 7 28202 Velocity in Feet per Second 13 0 8 0 17 9 31 8 49 7 71 6 127 5 198 9 286 4 389 9 509 2 795 6 1145 7 2036 9 3182 6 4582 9 6237 9 8147 4 10311 6 12730 4 18331 7 28643 4 41246 4 14 0 8 6 19 3 34 3 53 6 77 1 137 1 214 2 308 5 419 9 548 4 856 9 1233 9 2193 5 3427 4 4935 5 6717 7 8774 2 11104 8 13709 6 19741 9 30846 7 44419 2 15 0 J2 20 7 36 7 57 4 82 6 146 9 229 5 330 5 449 8 587 6 918 1 1322 0 2350 2 3672 2 5288 0 7197 6 9400 9 11898 0 14688 9 21152 0 33050 0 47592 0 Page 21 6 0 ei 8 3 14 7 23 0 Jod 58 8 91 8 152 2 179 9 235 0 367 2 528 8 940 1 1468 9 2115 2 2879 0 3760 4 4759 2 5875 6 8460 8 13220 0 19036 8 25911 2 33843 2 16 0 9 8 22 0 39 2 61 2 88 1 156 7 244 8 352 5 479 8 626 7 979 3 1410 1 2506 9 3917 0 5640 5 7677 4 10027 6 12691 2 15668 2 22562 2 35253 4 50764 8 7 0 4 3 9 6 17 1 26 8 38 6 68 5 1072. 0340 x pipe I D ft sec Imp gallons min 2 040 x pipe I D Y ft sec Litres sec 0 1545 x pipe I D ft sec Litres min 9 270 x pipe I D ft sec Cubic metres sec 0 0001545 x pipe I D Y ft sec Cubic metres min 0 00927 x pipe I D ft sec EXAMPLE 3 ID pipe Known Flow of 160 US gallons min 160 7 26 ft sec 2 448 x 3 Page 20 Greyline Pipe ID in 0 5 0 8 1 0 1 3 1 5 2 0 2 5 3 0 3 5 4 0 5 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 24 0 30 0 36 0 42 0 48 0 Pipe ID in 0 5 0 8 1 0 1 3 1 5 2 0 2 5 3 0 3 5 4 0 5 0 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 24 0 30 0 36 0 1 0 0 6 1 4 2 4 3 8 5 5 9 8 15 3 22 0 30 0 39 2 61 2 88 1 156 7 244 8 352 5 479 8 626 7 193 2 979 3 1410 1 2203 3 3172 8 4318 5 5640 5 11 0 6 7 15 1 26 9 42 1 60 6 107 7 168 3 242 4 329 9 430 9 673 2 969 5 172525 2693 0 3877 9 5278 2 6894 0 6725 2 10771 9 15511 5 24236 7 34900 8 2 0 1 2 2 8 4 9 Ld 11 0 19 6 30 6 44 1 60 0 78 3 122 4 176 3 313 4 489 6 705 1 959 7 1253 5 1586 4 1958 5 2820 3 4406 7 6345 6 8637 1 11281 1 12 0 Lsd 16 5 29 4 45 9 66 1 117 5 183 6 264 4 359 9 470 0 734 4 1057 6 1880 2 2937 6 4230 4 5758 0 7520 7 9518 4 11 751 1 16921 6 26440 0 38073 6 7slrumenis inc DFS II Doppler Flow Switch Series 1 4 FLOW CHART U S Gallons per Minute Velocity in Feet per Second
3. 1 154 2 209 9 274 2 428 4 616 9 1096 8 1 15 7 2467 7 3358 9 4387 1 5552 4 6854 8 9870 9 15423 3 22209 6 30229 8 39483 8 17 0 10 4 23 4 41 6 65 0 93 6 166 5 260 1 374 6 509 8 665 9 1040 5 1498 3 2663 6 4161 9 599531 8157 2 10654 3 13484 4 16647 4 23972 3 37456 7 53937 6 8 0 4 9 11 0 19 6 30 6 44 1 76 9 122 4 176 3 239 9 313 4 489 6 705 1 1253 5 1958 5 2820 3 3838 7 5013 8 6345 6 7834 1 11281 1 17626 7 25382 4 34548 3 45124 3 18 0 11 0 24 8 44 1 68 9 99 2 176 3 275 4 396 6 539 8 705 1 1101 7 1586 4 2820 3 4406 7 6345 6 8637 1 11281 1 14277 6 17626 7 25382 4 39660 0 57110 4 9 0 5 5 12 4 22 0 34 4 49 6 88 1 137 7 198 3 269 9 302 0 550 8 793 2 1410 1 2203 3 3172 8 4318 5 5640 5 7138 8 8813 3 12691 2 19830 0 28555 2 38866 8 50764 8 19 0 11 6 26 2 46 5 72 7 104 7 186 1 290 7 418 6 569 8 744 2 1162 9 1674 5 2977 0 4651 5 6698 1 9116 9 11907 8 15070 8 18605 9 26792 6 41863 4 60283 2 10 0 6 1 13 8 24 5 38 3 55 1 97 9 153 0 220 3 299 9 391 7 612 0 881 3 1566 8 2448 2 3525 3 4798 4 6267 3 7932 0 9792 6 14101 3 22033 4 31728 0 43185 4 56405 4 20 0 12 2 27 5 49 0 76 5 110 2 195 9 306 0 440 7 599 8 783 4 1224 1 1762 7 3133 6 4896 3 7050 7 9596 7 12534 5 15864 0 19585 2 28202 7 44066 7 63456 0
4. Average Flow Rate Before permanent tightening of swage lock fitting the probe can be inserted to variable depths to determine the flow profile Theoretical average flow occurs at 1 8 pipe diameter Installation Procedure Install a 1 NPT Female Nipple on the pipe Insert probe Tighten swage lock until 1t just grips the Probe then tighten of a turn Do not use above 100 psi 0 5 12 5 mm ID 0 6 15 mm OD 180 4 5 m ID 40 to 302 F 40 to 150 C 640KHz Stainless Steel with Epoxy face 20 ft 6 m RG174U shielded coaxial pair Protect sensor cable from contact with hot pipes 20 6 m CONTINUOUS SHIELDED COAXIAL PAIR 50 15 m OPTIONAL MARKER POINTS uy UPSTREAM ADJUSTABLE SWAGE LOCK FITTING 6 12 OR SPECIAL ORDER 316 STAINLESS STEEL Maximum Pressure Maximum Temperature Minimum Temperature Maximum Pipe Diameter Minimum Pipe Diameter Insertion Length Sensor Cable 100 psi 6 75 bar 200 F 93 C 10 F 23 C 48 1 2 m ID 2 50 mm ID 1 8 dia Y 19 mm 20 ft 6 m RG174U shielded coaxial pair Page 18 PVC 3 4 OD 19 mm a GP E E f i i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e SENSOR INTRINSIC SAFETY Option 2ISB When connected through Intrinsic Safety Barriers the Greyline Sensor Model SE3 is CSA certified for installation in a hazardous location rated Class I Grou
5. Doppler Flow Switch Series 1 4 inslrumenls i e LIMITED WARRANTY Greyline Instruments warrants to the original purchaser its products to be free from defects in material and workmanship for a period of one year from date of invoice Greyline will replace or repair free of charge any Greyline product if it has been proven to be defective within the warranty period This warranty does not cover any expenses incurred in the removal and re installation of the product If a product manufactured by Greyline should prove defective within the first year return it freight prepaid to Greyline Instruments along with a copy of your invoice This warranty does not cover damages due to improper installation or handling acts of nature or unauthorized service Modifications to or tampering with any part shall void this watranty This warranty does not cover any equipment used in connection with the product or consequential damages due to a defect in the product All implied warranties are limited to the duration of this watranty This is the complete warranty by Greyline and no other warranty is valid against Greyline Some states do not allow limitations on how long an implied warranty lasts or limitation of incidental or consequential damages so the above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state Greyline Instruments
6. Grounding must be provided as part of the installation Ground in accordance with the requirements of the National Electrical Code System grounding is provided by connecting grounding wires from all conduit entries to the steel mounting plate or another point which provides continuity Page 8 Greuling DFS II Doppler Flow Switch Series 1 4 inc PRINCIPLE OF OPERATION Greyline flow instruments continuously inject sound into the flowing liquid and measure the change in frequency of any echoes received from suspended particles air bubbles etc in the liquid The sound frequency of 640 000 wave lengths second travels through the liquid at 4 800 feet second for water The 640 000 wave lengths occupy 4 800 feet If the target 1s moving away from the receiver the same number of wave lengths has to occupy a bigger distance and so each wave length appears longer The longer wave length means fewer wave lengths second or a lower frequency The reverse 1s true 1f the target moves towards the receiver the distance 1s shortened the wave length appears shorter and the frequency higher Greyline instruments measure only the change in frequency and will read the same whether the flow is towards or away from the transducer LAMINAR amp TURBULENT FLOW Two basic conditions exist in flowing liquids One is turbulent flow where the velocity of the fluid is the same at the pipe wall as it is in the center The other is laminar flow
7. Inc Page 14 a GP E e f i i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e SPECIFICATIONS Sensor Mounting Silicone coupling compound 4 92 in PCK stainless steel Pipe Clamp Kit l 7 ist a U for 0 5 12 5 mm OD pipes or larger Electronics Enclosure watertight dust tight NEMA4X i ee IP67 polycarbonate Output 1 Relay 5 ampere DPDT jo de oa Set Point On Off adjustment 0 25 10 ft sec 0 076 3 m sec Greyline Relay Time Delay adjustable 0 60 seconds Pa Failsafe Mode switch selectable a Dos Indication Relay and Signal strength LED s j 4 21 in 107 mm 76 mm Sensitivity adjustable FACE VIEW SIDE VIEW Power Input 100 130VAC 50 60Hz 4 2 W max Optional 200 260VAC 50 60Hz 4 8 W max Optional 24VDC 3 6 W max Surge Protection sensor AC power input STANDARD SENSOR SE3 LE EE Coed A PILLAT NA LLL END T VIEW m 1 om SIDE VIEW 1 25 51 75 mm a 2 25 57 mm 20Ht Oo0m gt Minimum Pipe Diameter 0 5 12 5 mm ID 0 6 15 mm OD Maximum Pipe Diameter 180 4 5 m ID Operating Temprature 40 to 200 F 40 to 93 C Operating Frequency 640KHz Sensor Housing Stainless Steel with Epoxy face Sensor Cable 20 ft 6 m shielded coaxial pair RG174U Optional 50 ft 15 m con
8. cause sound attenuation and Doppler performance may be erratic Steel aluminum copper PVC and other plastic pipes are generally ideal with minimal sound attenuation Avoid pipes with loose insertion liners where sound transmission may be broken by air gaps Sound refraction may occur with some liner materials such as cement or coal tar as the Doppler signal travels through different densities of the liner and pipe wall The resulting error can normally be corrected by calibration in situ PIPE DIAMETER The standard SE3 sensor is designed to mount on pipes linch 25mm I D or larger An optional small pipe sensor Model SSE3 is available for pipe inside diameters of Y or larger DEPOSITS Scale or sediment deposits in older pipes alter the pipe cross section resulting in high flow volume readings Deposits can also cause sound attenuation and reduce Doppler signal strength NOISE INTERFERENCE The Doppler circuit 1s designed to lock onto the strong Doppler return signal and to ignore most external process noise Marginal applications where the liquid contains minimal solids or gases require increased Sensitivity adjustment and may be more sensitive to external noise ELECTRICAL INTERFERENCE High voltage sources or DC motors in very close proximity to the Doppler sensor cable or electronics can interfere with the Doppler signal Stray mains voltage 50 or 60 Hz can occasionally be measured on conductive pipes and care should be taken
9. to eliminate the problem at its source POWER LINE FLUCTUATIONS Voltage variences of 10 of the instrument s nominal input will not affect performance or accuracy FLUID TEMPERATURE Within the sensor tolerances 40 to 200 F 40 to 93 C the Doppler accuracy will not be affected more than 0 3 Higher or lower temperatures may damage or reduce the operating life of the sensor Use optional high temperature sensor model SE3H for temperatures up to 302 F 150 C CALIBRATION DRIFT The DFS II calibration does not drift over time The solid state sensor has no moving parts to wear and affect calibration The Doppler principle generates a digital signal proportional to the velocity of flow All timing counting circuits use crystal controlled references to eliminate any drift in the processing circuitry Page 10 a GP E e f f i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e TYPICAL DFS II CONTROL APPLICATIONS 1 HI FLOW ALARM Eg Alarm if flow exceeds 8 ft sec SETTINGS NORMAL ON TRIP POINT 8 FT SEC OFF TRIP POINT 7 5 FT SEC DELAY AS REQUIRED TYPICAL 10 SEC 2 HI FLOW ALARM WITH FAILSAFE Eg Alarm if flow exceeds 5 ft sec and if Power loss SETTINGS FAILSAFE ON TRIP POINT 5 FT SEC OFF TRIP POINT 4 FT SEC DELAY AS REQUIRED TYPICAL 10 SEC 3 PUMP PROTECTION CIRCUIT START P ushB utton DFS I RELAY CONT ACT SETTINGS NORM
10. where the flow at the pipe wall is very slow and gradually increases to a maximum at the center of the pipe In the factory all equipment is calibrated and tested against water with a 0 25 entrained air as the reflective medium Pipe diameter does not affect accuracy and shown here are some typical results that may be expected in different situations TURBULENT FLOW Ss SENSOR ix SOLIDS T YFICAL ACCURACY S tex ZOUHD S TO FIFE CENT LAMINAR FLOW iz SOLIDS TYPICAL ACCURACY tax H ld SENSOR Mik SOQUHMO PENETREATES T FIFE CENTER TURBULENT FLOH SENSOR 66 SOLIDS TYPICAL ACCURACY tex SOUND PENETREATES To 190 OF PIPE DIAMETER LAMINAR FLOW ENSOR 664 SOLIDS TYPICAL ACCURACY tox SOUHO PEHETRATES TO 10 OF FIFE DIAMETER If the sound cannot penetrate to the center of the pipe a laminar flow condition will cause the flow switch to read low due to a lower flow rate existing at the point at which sound reflections occur This problem may be overcome by calibrating the switch on the pipe and comparing the readings with a known accurate flow meter or by adjusting the set points while controlling flow at the desired set point velocities Page 9 D GP 3 YJ f f Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls inc APPLICATIONS BACKGROUND PIPE MATERIAL Sound conductivity varies according to density of the pipe material Porous materials such as concrete or pitted cast iron
11. AL ON TRIP POINT 0 5 FT SEC OFF TRIP POINT 0 FT SEC DELAY AS REQUIRED TYPICAL 20 SEC Page 11 D Gr 3 e f i Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls inc TROUBLESHOOTING RELAY OPERATES WHEN THERE IS NO FLOW Possible Cause ON or OFF points set to less than 0 ft sec vibration on pipe local electrical noise Relay mode set to FAILSAFE Corrective Action adjust set points above 0 ft sec relocate sensor reduce Sensitivity set Relay mode to NORMAL ERRATIC OPERATION Possible Cause sensor mounted too close to pump valve or elbow sensor mounted without coupling compound Corrective Action change sensor placement check coupling and coupling compound RELAY DOES NOT OPERATE Possible Cause OFF point higher than ON set point relay ON point too high power interruption Corrective Action adjust ON point higher than OFF set point decrease relay ON set point check fuse breaker SIGNAL STRENGTH LED DOES NOT ILLUMINATE Possible Cause improper transducer connections improper sensor mounting not enough suspended particles or gases in fluid no flow Corrective Action check transducer connections check sensor mounting relocate sensor or inject air into pipeline confirm flow Page 12 Greuline inslrumenls i e APPLICATIONS HOTL
12. INE DFS II Doppler Flow Switch Series 1 4 For applications assistance advice or information on any Greyline Instrument contact your Sales Representative write to Greyline or phone the Applications Hotline below Tel 315 788 9500 Fax 315 764 0419 Tel 613 938 8956 Fax 613 938 4857 United States Canada Toll Free Email Web Site 888 473 9546 info greyline com http www greyline com Greyline Instruments Inc Canada 16456 Sixsmith Drive Long Sault Ont KOC 1P0 PRODUCT RETURN PROCEDURE USA 407 County Route 46 Massena NY 13662 Instruments may be returned to Greyline for service or warranty repair Before shipping a product to the factory please contact Greyline by telephone or Fax to obtain an RMA number Returned Merchandise Authorization This ensures fast service and correct billing or credit When you contact Greyline please have the following information available Serial number Date of Purchase AA i Model number Software Version Reason for return description of fault or modification required Your name company name address and phone number After obtaining an RMA number please ship the product to the appropriate address below Canadian and International Customers Greyline Instruments Inc 16456 Sixsmith Drive Long Sault Ont KOC 1P0 RMA Page 13 USA Customers Greyline Instruments Inc 407 County Route 46 Massena NY 13662 RMA D GP 8 e f i I 2 DFS II
13. USER S GUIDE Installation amp Operation Instructions Doppler Flow Switch Model DFS II Manual Series 1 4 D GP 3 YJ f i Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls inc INDEX nto dico eses aros A 3 Comed iaa ora da eee ss 4 Adjustments eee 6 ae RAE AA E AA EA ERA 4 Transducer Installation rre 5 Palos D en eee ee ee eG eee aaa 8 Priniciple of Operation eee AH Se So AR ARA Sw Se ee A 9 Applications Background ek te we oe ee ew ee ew ee a we eRe oe ee we 10 Typical DFS II Control Applications ttt tt tt ts 11 Troubleshooting lt M a A E A AE A E A A A 12 Applications Hotline lt lt lt 0 o e 12 Product Reun Proceduta er irra pengea sas A 13 Warranty ee sose boe a a ee 14 Specifications lt oc oc oo r 15 Appendix A Options ee 16 Appendix B Flow Velocity Calculation 20 IMPORTANT NOTE This instrument is manufactured and calibrated to meet product specifications Please read this manual carefully before installation and operation Any unauthorized repairs or modifications may result in a suspension of the warranty Available in Adobe Acrobat pdf format Page 2 a GP E e f f i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e INTRODUCTION DOPPLER FLOW SWITCH Model DFS II The Greyline Doppler flow switch consists of an encapsulated ceramic transducer a transmitter receiver unit electronic circuitry to separate the Doppler frequency from the transmi
14. VENLY DISTRIBUTED FLOW Generally the sensor must be mounted away from flow disturbances such as valves pumps orifice plates or venturis which tend to increase flow velocity or cause cavitation Velocity increasing devices often cause cavitation and readings both up and downstream may show much higher velocity As a guideline mount the sensor 20 diameters upstream and 30 diameters downstream from velocity increasing devices Turbulence Increasing Devices Elbows flanged connections and tees tend to introduce desirable SENSOR MOUNTS 6 DIAMETERS UPSTREAM OR 10 DOWNSTREAM conditions of an evenly distributed flow profile with FROM AN ELBOW some air or gases entrained in the flow Sensor mounting 6 diameters upstream and 10 diameters downstream from these disturbances is generally optimum The transducer is designed to mount longitudinally on a straight section of pipe Do not attempt to mount it on bends elbows or fittings The DFS sensor measures flow in either direction Prepare an area 2 inches wide by 3 inches long for transducer bonding by removing all paint scale and rust Thoroughly degrease the surface to which the transducer will be bonded The objective of site preparation is to eliminate any discontinuity between the transducer and the pipe wall which would prevent acoustical coupling For semi permanent or temporary bonding the following are recommended a Dow Corning silicon compound 4 Greyline Part CC b Electr
15. nstalled in metal conduit SENSOR CABLE JUNCTION BOX OPTION DJB Optional Watertight steel NEMA4 Junction Boxes with terminal strips are available from Greyline Instruments DIMENSIONS OPTION DJB JUNCTION BOX SIDE VIEW 73mm TOP VIEW Mounting 5 127mm Page 16 a GP E e f f i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e 230VAC 50 60Hz POWER INPUT OPTION EI DFS II EI Flow Switches with optional 230VAC power input are shipped factory configured for 230VAC power input Connections are made to Line Neutral and Ground as illustrated in the Manual section titled CONNECTIONS 24VDC POWER INPUT OPTION DC DFS II DC Flow Switches are factory configured for 24VDC power input Page 17 Greuline inslrumenls inc SE3H HIGH TEMPERATURE DOPPLER SENSOR DFS II Doppler Flow Switch Series 1 4 OVERALL LENGTH 11 5 290 mm 1 375 SENSOR LE 55 mm TOP VIEW H la 2 25 57 mm V 1 00 SENSOR E 25 4 Li SIDE VIEW A lt STAINLESS STEEL HE atuminuw PVC Minimum Pipe Diameter Maximum Pipe diameter Operating Temperature Operating Frequency Sensor Housing Sensor Cable Note ISE INSERTION FLOW SENSOR Insertion Depth 1 8 pipe inside diameter plus 20 mm Orientation Screw head makes the active face and should point upstream 5
16. ocardiograph gel c Petroleum gel The above are arranged in their order of preferred application B amp C are suggested only for room temperature application DO NOT USE Silicon RTV compound silicon rubber Page 5 D GP 3 YJ f i Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls inc One PCK Pipe Clamp Kit is included with each Greyline DFS II It includes recommended silicone coupling compound in a plastic applicator a stainless steel sensor bracket and a stainless strap for pipe diameters up to 16 406 mm Additional pipe clamps optional may be attached for larger diameter pipes STAINLESS amp STEEL F MOUNTING BRACKET EN PIPE ADJUSTABLE STAINLESS STEEL STRAP Thread the strap through the bracket and mount losely on the pipe ready for Sensor coupling SENSOR COUPLING Prepare a pipe clamp to secure the sensor Apply coupling compound to the coloured face of the sensor A bead similar to toothpaste on a toothbrush 1s ideal Press the sensor on to the pipe and secure with the clamp DO NOT overtighten COMPOUND For proper operation the transducer must be fixed securely to the pipe with coupling material between the transducer face and the pipe Sensor installation with excessive coupling compound or epoxy can result in gaps or voids in the coupling and cause errors or loss of signal Insufficient coupling compound will c
17. ps C D Class II Groups E F and G Class HI Intrinsic Safety Barriers may be ordered with the Greyline instrument and are supplied mounted in the Greyline instrument enclosure Replacement barrier fuses Part No ISB 011239 may be purchased separately The Instrument Enclosure containing the 2ISB Intrinsic Safety Barriers must be installed in a non hazardous location The Sensor connecting cable and Junction boxes may be located in the hazardous rated area Instrinsic Safety Barrier Specifications Certified rated 9 3V max 25 ohms min Recommended Stahl Model 9001 02 093 390 10 NON HAZARDOUS LOCATION DFS II Doppler Flow Switch rom end Q HAZARDOUS LOCATION CLASS I GROUPS C D CLASS II GROUPS E E G SEE NOTE CLASS IlI NOTE BARRIER EQUIPPED UNITS ARE FACTORY WIRED WITH SENSOR GROUND THROUGH THE INSTRUMENT CHASSIS POWER INPUT GROUND MUST BE CONNECTED TO A GOOD GROUND lt 1 Ohm WITH A 12AWG CONDUCTOR REPLACEMENT FUSE ASSEMBLY ORDER PART NO ISB 01 1239 160mA Page 19 D GP 3 YJ f f Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e APPENDIX B FLOW VELOCITY CALCULATION Flow velocity can be calculated from the following data KNOWN FLOW DIVIDED BY VELOCITY U S gallons sec 0 0408 x pipe I D ft sec U S gallons min 2 448 x pipe I D Y ft sec Imp gallons sec 0
18. reate similar conditions Over time temporary coupling compounds may gradually sag away from the sensor resulting in reduced signal strength and finally complete loss of signal Warm temperatures water and vibration will accelerate this process Loss of Signal will be indicated by the Signal Strength LED on the face of the DFS II Page 6 a GP 3 e f i i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e SENSOR COUPLING AND MOUNTING RECOMMENDATIONS BAD GOOD Page 7 D GP 3 YJ f i Ua 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls inc ENCLOSURE INSTALLATION NEMA4X 1P67 WITH CLEAR COVER LOCATION Select a wall location within 20 ft 6 m of the sensor mounting location Sensor cable may be extended up to 500 ft 150 m if enclosure installation is required at a remote location To protect the electronics from overheating and condensate build up DO NOT mount the enclosure in direct sunlight Avoid mounting on vibrating structures 1 Remove enclosure cover 2 Insert 8 screws and washers through the enclosure mounting holes to ENCLOSURE secure the enclosure to the wall or mounting stand MOUNTING HOLES 3 Replace cover Additional conduit holes can be cut in the ends and side walls of the enclosure when required Use a hole saw or Greenlee type hole cutter END VIEW Note This non metallic enclosure does not automatically provide grounding between conduit connections
19. til the Signal Strength light is mid intensity Excessive Sensitivity adjustment Maximum LED brightness may result in nuisance alarms TIME DELAY Adjust for up to 60 seconds delay after the switch senses an alarm condition NORMAL FAILSAFE SWITCH NORMAL Relay energizes when flow exceeds the ON set point FAILSAFE Reverses operation of the relay Relay de energizes when flow exceeds the ON set point Allows the DFS II to operate as a High flow alarm Power loss alarm SET TRIP POINT Two separate controls allow a relay deadband with ON OFF set points from 0 25 to 10 ft sec 0 076 to 3 m sec Example Set Relay ON at 5 Set Relay OFF at 3 Relay will switch ON when flow exceeds 5 ft sec and OFF when it drops below 3 ft sec Page 4 a GP E E f i i 2 DFS II Doppler Flow Switch Series 1 4 inslrumenls i e TRANSDUCER INSTALLATION MOUNTING LOCATION The position of the sensor is one of the most important considerations for accurate Doppler flow measurement The same location guidelines apply to Doppler as to most other types of flow switches 12 O CLOCK POSITION WITH LOW GAS CONTENT VERTICAL OR HORIZONTAL PIPE Vertical pipe runs C CoS e generally provide evenly distributed flow conditions On ES horizontal runs the sensor should be positioned at 3 or 9 GAS OR SOLIDS CONTENT o clock to avoid concentrations of gas at the top of the pipe S VERTICAL PIPE USUALLY and solids on the bottom HAS E
20. tinuous Submersion Rating Withstands accidental submersion pressure up to 10 psi 0 7 Bar Hazardous Locations Rated for sensor and cable installation in Class Div l l Groups C D E F G Hazardous locations with optional Intrinsic Safety Barriers Page 15 GP SE Mi f Ua 2 DFS II Doppler Flow Switch Series 1 4 J RI inc APPENDIX A OPTIONS EXTRA SENSOR CABLE OPTION DXC Each Greyline flow switch includes 20 ft 6m shielded coaxial pair cable Additional cable and Cable Junction Box Option DJB may be ordered with the Flow Switch or the cable may be spliced and extended up to 500 ft 152m as required during installation No adjustment is required when the sensor cable is extended or shortened Use only Greyline shielded coaxial pair cable Extended sensor cable can be installed in conduit for mechanical protection Recommended installation with a metal junction box 1s illustrated below TERMINAL BLOCK SENSOR CABLE 20 ft 6m SHIELDED COAXIAL PAIR EXTENDED SENSOR CABLE TO ELECTRONICS ENCLOSURE CONDUIT BY CUSTOMER If Required For Mechanical Protection MAX LENGTH SENSOR 500 ft 152m GREYLINE SHIELDED GREEN WIRES COAXIAL PAIR MUST BE CONNECTED TO GND TERMINAL Note Instead of Greyline Option DXC shielded coaxial pair you may substitute RG174U coaxial cable from your local electrical cable distributor but this cable is not shielded so extended cable must be i
21. tted frequency and an adjustable set point relay The relay also has delay on delay off and time delay capability The DFS II Flow Switch is housed in a watertight NEMA4X fiberglass enclosure and requires a 115VAC power supply Flow measurement range is 0 25 to 10 ft second 0 076 to 3 m sec Page 3 GP SE Mi f Ua 2 DFS II Doppler Flow Switch Series 1 4 J RI inc CONNECTIONS SENSOR Connect one sensor coaxial cable to the RCVR and GND terminal block and the second sensor coaxial cable to the TMTR and GND terminal D F S en block TMTR and RCVR are the solid core of each Doppler Flow Switch row O TKB coaxial cable and GND is the stranded shield or oe GND N green conductor of each coaxial cable SENSITIVITY 100 POWER INPUT Connect 115VAC 50 60Hz to the O O sE LINE NEUTRAL and GROUND terminals Do not SGNA4 Eo apply power until sensor connections have been made SET TRIP POINT OFF ON QUICK BENCH TEST SECS S FAILSAFE a OFF 5 5 ON To test operation of the DFS II set Sensitivity to 8 NORMAL J Maximum Hold the sensor in one hand and briskly 0 10 0 10 rub the face plastic surface with your thumb 0r ft OREN ado fingers Allow a few seconds for the DFS II Signal O Strength LED to illuminate RELAY pasea EE gt lt NEUTR GROUND ADJUSTMENTS SENSITIVITY The SIGNAL STRENGTH LED varies in intensity depending on signal strength Under normal flow conditions adjust un
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