User`s Guide Series 1.6
Contents
1. Maximum Pressure 100 psi 6 75 bar Maximum Temperature 200 F 93 C Minimum Temperature 10 F 23 C Maximum Pipe Diameter 48 1 2 m ID Minimum Pipe Diameter 2 50 mm ID Insertion Length 1 8 dia 19 mm Sensor Cable 20 ft 6 m RG174U shielded coaxial pair Page 18 3 4 OD 19 mm DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc 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 Groups C D Class II Groups E F and G Class III 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 Intrinsic Safety Barrier Specifications Certified rated 9 3 V max 25 ohms min Recommended Stahl Model 9001 02 093 390 10 NON HAZARDOUS LOCATION 6 89 175mm Mounting 6 18 157mm DFS II Factory Factory Doppler Flow Switch rcvr SO Mr cu iow eno SI RCVR TMTR o 9 1 1 sf SET TRIP POINT OFF ON HAZARDOUS LOCA2. 1 Remove enclosure cover COVER amp 2 Insert 8 screws and washers through the enclosure mounting holes to ENCLOSURE secure the enclosure to the wall or mounting stand 7 MOUNTING N 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 Ofi ENCLOSUR Note This non metallic enclosure does not automatically provide grounding EP between conduit connections 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 3REYLINE instruments Inc PRINCIPLE OF OPERATION DFS II Doppler Flow Switch Series 1 6 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 is 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 seco
3. 3REYLINE instruments inc USER S GUIDE Installation amp Operation Instructions Doppler Flow Switch Model DFS II Manual Series 1 6 DFS II Doppler Flow Switch Series 1 6 GREYLINE instruments Inc INDEX Introduction 0l 3 Connections Ew uM ee Ud Se Hep e de nike de o ceu vae ce AD ex er de LX Wn E eee HER DE 4 Adjustments s s set m n e m e e e e e e e e eee 4 Transducer Installation Lp A Ix 5 Enclosure installati e 39 4 3089 ob ee Ped dde B RA Rev bus d a 8 Priniciple of Operation 5 s 5 stt t t t t t rts 9 Applications Background t nnn 10 Typical DEPS II Control Applications eae ms 11 Troubleshooting 12 Applications Hotline s s st rn 12 Product Return Procedure eras Rub AA ek Re ae de IRR 13 Warranty s 5 5 5 tto e e n e m e he e e e e e e e e 14 Specifications s s o t t n t e e rr ne 15 Appendix A Options s sss tt t t t t t t t t e t n t n nn 16 Appendix B Flow Velocity Calculation 21 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 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc INTRODUCTION DOPPLER FLOW SWITCH Model DFS II The Gre
4. 60 XS sil sd o e oooga woo To test operation of the DFS II set Sensitivity to RELAY x T J J G N Maximum Hold the sensor in one hand and ve briskly rub the face plastic surface with your thumb or fingers Allow a few seconds for the DFS II Signal Strength LED to illuminate ADJUSTMENTS SENSITIVITY The SIGNAL STRENGTH LED varies in intensity depending on signal strength Under normal flow conditions adjust until 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 20 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc APPENDIX B FLOW VELOCITY CALCULATION Flow velocity can
5. O CLOCK POSITION WITH LOW GAS CONTENT VERTICAL OR HORIZONTAL PIPE Vertical pipe runs C p 3 generally provide evenly distributed flow conditions On EE 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 and solids on the bottom NAS EVENLY DISTRIBUTED ROW 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 a E UPSTREAM OR 10 DOWNSTREAM conditions of an evenly distributed flow profile with oe ee ee some air or gases entrained in the flow Sensor mounting 6 diameters upstream and 10 diameters n a a FLOW p a 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
6. ft 6m 51 75 mm Minimum Pipe Diameter Maximum Pipe Diameter Operating Temperature Operating Frequency Sensor Housing Sensor Cable Submersion Rating Hazardous Locations 0 5 12 5 mm ID 0 6 15 mm OD 180 4 5 m ID 40 to 200 F 40 to 93 C 640KHz Stainless Steel with Epoxy face 20 ft 6 m shielded coaxial pair RG174U Optional 50 ft 15 m continuous Withstands accidental submersion pressure up to 10 psi 0 7 Bar Rated for sensor and cable installation in Class Div 1 1l Groups C D E F G Hazardous locations with optional Intrinsic Safety Barriers Page 15 DFS II Doppler Flow Switch Series 1 6 GREYLINE instruments 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 is illustrated below TERMINAL BLOCK EXTENDED SENSOR DELI 20 ft 6m SHIELDED CABLE TO EL
7. 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 Electrocardiograph 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 DFS II Doppler Flow Switch Series 1 6 GREYLINE instruments 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 ODIAINLEOOS STEEL UN amp MOUNTING dH BRACKET Y ADJUSTABLE PIPE 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 tooth
8. 39 13220 1at01 14983 15864 16745 17627 sol 17235 18802 20369 21035 23502 25069 26636 28203 29770 31336 Page 22
9. ECTRONICS A m ENCLOSURE CORE Y COAXIAL PAIR e am O 7 CONDUIT BY CUSTOMER SHIELD SENSOR If Required For Mechanical Protection O MAX LENGTH CORE 500 ft 152m Q Y GREYLINE SHIELDED GREEN GND 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 installed in metal conduit COAXIAL CABLE PREPARATION DXC Doppler sensor cable can be cut and spliced up to a maximum length of 500 ft 152 m Cable ends must be prepared as illustrated below GOOD BAD BLACK BLACK INSULATION INSULATION HAS BEEN HAS NOT REMOVED BEEN REMOVED Page 16 5REYLINE DFS Il Doppler Flow Switch Series 1 6 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 5 5 140mm SIDE VIEW ani 3 31 j 84mm Mounting A 5 127mm 230VAC 50 60Hz POWER INPUT OPTION EI 28mm TOP VIEW DFS II EI Flow Switches with optional 230VAC power input are shipped factory configured for 230V AC power input Connections are made to Line Neutral and Ground as illustrated in the Manual section titled C
10. MAL 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 DES 11 C PLC a 2V INPUT CARD NC 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 II RELAY CONT ACT SETTINGS NORMAL ON TRIP POINT 0 5 FT SEC OFF TRIP POINT 0 FT SEC DELAY AS REQUIRED TYPICAL 20 SEC Page 11 3REYLINE instruments Inc TROUBLESHOOTING DFS II Doppler Flow Switch Series 1 6 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 poin
11. ONNECTIONS 24VDC POWER INPUT OPTION DC DFS II DC Flow Switches are factory configured for 24VDC power input Page 17 3REYLINE instruments Inc DFS II Doppler Flow Switch Series 1 6 SE3H HIGH TEMPERATURE DOPPLER SENSOR 1 575 SENSOR IET 25 TOP VIEW i 220 57 mm 100 SENSOR I 25 4 mm SIDE VIEW ug le OVERALL LENGTH 11 5 290 mm ALUMINUM aT STAINLESS STEEL Minimum Pipe Diameter Maximum Pipe diameter Operating Temperature Operating Frequency Sensor Housing Sensor Cable Note 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 ISE INSERTION FLOW SENSOR Insertion Depth 1 8 pipe inside diameter plus 34 20 mm Orientation Screw head makes the active face and should point upstream 5 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 it just grips the Probe then tighten 4 of a turn Do not use above 100 psi
12. TION E E E DE LO Mm E N E Lo FT SEC GNDISTI CLASS I GROUPS C D Se PA t CLASS Il GROUPS E F G 2 39 ea o o CLASS III Ko 8 SS s ala 4 NOTE ee LAY 1 3IC fe IC TIE JJ LJ Ybr y E NEUTRAL O GROUND eo DZ s XAY YLNL ES SENSOR NOTE BARRIER EQUIPPED UNITS ARE FACTORY WIRED WITH 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 011239 160mA Page 19 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc 24VDC POWER INPUT OPTION CONNECTIONS GND Oo gt SENSOR Connect one sensor coaxial cable to the RCVR and GND terminal block and the D F S l second sensor coaxial cable to the TMTR and Doppler Flow Switch rcv SO V GND terminal block TMTR and RCVR are the eno fy solid core of each coaxial cable and GND is the ao stranded shield or green conductor of each coaxial O L SIGNAL o cable STRENGTH ONLY gam POWER INPUT Connect only 24VDC 0 15 SET TRIP POINT Amps to the and terminals The Power Input aia E GND terminal must be connected to the nearest bi Ry ZA 7 TIME DELAY TMTR O Ground pole A 1 amp fuse in line is SECS aa recommended Power Consumption is 3 6 W a continuous 0
13. 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 LD y ft sec Imp gallons sec 0 0340 x pipe I D ft sec Imp gallons min 2 040 x pipe I D ft sec Litres sec 0 1545 x pipe I D ft sec Litres min 9 270 x pipe LD ft sec Cubic metres sec 0 0001545 x pipe I D ft sec Cubic metres min 0 00927 x pipe LD ft sec EXAMPLE 3 ID pipe Known Flow of 160 US gallons min 160 7 26 ft sec 2 448 x 3 Page 21 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc FLOW CHART U S Gallons per Minute Velocity in Feet per Second Les tal asf ssf esp ss se mol zal 18 to 24 49 73 X 98 122 taz tt 196 2201 245 20 os 196 294 X 392 X 490 588 685 783 881 979 as 3oo 60 0 soo 1200 1499 1799 2099 2399 2699 2999 Go ess 1763 2644 3525 4407 5288 6169 7051 7932 8813 sol 1567 3134 4700 6267 7834 9401 10968 12535 14101 15668 EL qe oq d ES q pp de A qp A Pipe VelocityinFeetperSecond___________ ___ T IDin 110 120 13 0 140 150 teo 170 seo too 200 osp 6 73 so ses oo os tos no tel 122 osp asa tes 179 193 207 220 234 248 262 275 is 606 661 mel 77al 826 ss 93 6 992 1047 1102 Gol 9695 1057 6 11457 123
14. e n 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 204 150th Avenue Madeira Beach FL 33708 RMA DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc 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 warranty This warranty does not cover any equipment used in connection with the product or consequential damages due to a defect in the p
15. ensitivity to Maximum Hold the sensor RELAY Wicd in one hand and briskly rub the face 19 il gt plastic surface with your thumb or fingers Allow a few seconds for the DFS II Signal Strength LED to illuminate NEUTRAL GROUND ADJUSTMENTS SENSITIVITY The SIGNAL STRENGTH LED varies in intensity depending on signal strength Under normal flow conditions adjust until 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 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc 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
16. his 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 DFS II Doppler Flow Switch Series 1 6 GREYLINE instruments Inc APPLICATIONS BACKGROUND PIPE MATERIAL Sound conductivity varies according to density of the pipe material Porous materials such as concrete or pitted cast iron 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 1 2 inch 12 5mm I D 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 is designed to lock onto the strong Doppler return signal and to ignore most external process noise Marginal applications where the liquid contains minimal solid
17. nd or a lower frequency The reverse is true if the target moves towards the receiver the distance is 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 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 2596 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 TURBULEHT FLOW 1x SOLIDS TYPICAL ACCURACY tex SOUND PENETRATES TO PIPE CENTER LAMINAR FLOW ix SOLIDS TYPICAL ACCURACY tax SOUND PENETRATES TO FIFE CENTER TURBULENT FLOW 60 SOLIDS TYPICAL ACCURACY tsx S0UND PENETRATES TO 10 OF PIPE DIAMETER LAMINAR FLOW 66x SOLIDS TYPICAL ACCURACY fsx SOUND PENETRATES TO 10 OF PIPE 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 T
18. paste on a toothbrush is ideal Press the sensor on to the pipe and secure with the clamp DO NOT overtighten COMPOUND SENSOR 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 create 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 DFS Il Doppler Flow Switch Series 1 6 GREYLINE instruments inc SENSOR COUPLING AND MOUNTING RECOMMENDATIONS BAD GOOD 0 SS 2000 Page 7 DFS II Doppler Flow Switch Series 1 6 SREYLINE instruments inc ENCLOSURE INSTALLATION NEMA4X IP66 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
19. roduct All implied warranties are limited to the duration of this warranty 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 Inc Page 14 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc SPECIFICATIONS Sensor Mounting Silicone coupling compound PCK stainless steel Pipe Clamp Kit 6 3 x T for 0 5 12 5 mm OD pipes or larger Electronics Enclosure watertight dust tight NEMA4X p AM IP67 polycarbonate Output 1 Relay 5 ampere DPDT Set Point On Off adjustment 0 25 10 ft sec 0 076 3 m sec Greyline Relay Time Delay adjustable 0 60 seconds nalfumenii in Failsafe Mode switch selectable a is Indication Relay and Signal strength LED s 7 RR Sensitivity adjustable 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 END l ES ecu NO VIEW mii SIDE VIEW a 129 2 25 157 mm 4 20
20. s 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 to eliminate the problem at its source POWER LINE FLUCTUATIONS Voltage variances 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 3REYLINE instruments Inc DFS II Doppler Flow Switch Series 1 6 TYPICAL DFS II CONTROL APPLICATIONS 1 HI FLOW ALARM Eg Alarm if flow exceeds 8 ft sec DF SII c PLC JE AM INPUT E _ CARD NO SETTINGS NOR
21. t 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 no flow not enough suspended particles or gases in fluid Corrective Action check transducer connections check sensor mounting confirm flow relocate sensor or inject air into pipeline Page 12 3REYLINE instruments Inc APPLICATIONS HOTLINE DFS II Doppler Flow Switch Series 1 6 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 105 Water Street 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
22. yline Doppler flow switch consists of an encapsulated ceramic transducer a transmitter receiver unit electronic circuitry to separate the Doppler frequency from the transmitted 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 DFS II Doppler Flow Switch Series 1 6 3REYLINE instruments Inc CONNECTIONS SENSOR Connect one sensor coaxial cable to the RCVR and GND terminal DFS II block and the second sensor coaxial cable Doppler Flow Switch reve S to the TMTR and GND terminal block cno S i ADJUST TMTR and RCVR are the solid core of ooo each coaxial cable and GND is the O stranded shield or green conductor of each s n Q dn coaxial cable STRENGTH ONLY POWER INPUT Connect 115VAC SET TRIP POINT 50 60Hz to the LINE NEUTRAL and FUSEC ov FJ j GROUND terminals Do not apply power mitem mmr S b until sensor connections have been made eee ony wrk 5 ON NORMAL 0 60 M f QUICK BENCH TEST 9 T penne aa TAWG MA onan To test operation of the DFS II set D eee alo ZEE S
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