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Emerson Fisher 3710 Instruction Manual

1. ADD LUBE SECTION B B KZ zu Dr ew WEISS REAR VIEW ADD LUBE 46 Instruction Manual D101728X012 3710 and 3720 Positioners January 2015 Figure 31 Fisher 3710 Components and Subassemblies continued Key 28 29 30 31 32 33 1 3710 WITH GAUGES ADD LUBE 42B7272 SHT 3 OF 3 Description Action block A03600 aluminum Action block gasket Chloroprene Synthetic rubber Input module assy Includes summing beam assy and flexure Nitrile Synthetic rubber O ring For use between input module assy and positioner base plate Nitrile Synthetic rubber Zero adjustment pivot 18 8 SST Washer metric 18 8 SST For zero adjustment pivot Recommended spare parts 1 Also recommended as a spare if metric fasteners are not available at the installation site 3710 WITH TIRE VALVES 3710 WITH STANDARD LOW PROFILE INDICATOR Part Number 32B7262X012 32B7262X032 32B7280X012 32B7280X022 12B7292X012 12B7292X032 12B7317X012 Key Description Part Number 34 1 Retaining ring E clip metric 18 8 SST For zero adjustment pivot 12B7318X012 Note Two zero adjusters key 35 are required one for the zero adjustment locknut and one for the zero adjustment knob 35 Zero adjuster SST plastic 2 req d 36 18 8 SST Rotary Valves std 90 deg rotation 32B7303X012 Sliding Stem Valves 34B4169X01
2. 4QZ UK P Dubai United Arab Emirates eS Singapore 128461 Singapore www Fisher com EMERSON Pr ess Manaaement 1987 2015 Fisher Controls International LLC All rights reserved Frocess g eme nt
3. Tamb lt Li 0 mH I2G amp D Flameproof Gas ExdlIC T5 Gb Dust Ex tb IIIC T82 C Db Tamb lt 79 C 5 Tamb lt 82 C II3G amp D Typen Gas Ex nA IIC T6 Gc Dust Ex tc Dc T85 Tamb lt 82 C T6 Tamb lt 82 C 1 These hazardous area classification also apply to 3720 positioners 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 IECEx Conditions of Certification Intrinsically Safe WARNING Substitution of components may impair intrinsic safety 40 C lt lt 82 6 lt 47 T5 Ta lt 62 4 lt 82 C Entity Parameters Ui 30 V 150 mA 1 25 W Ci 0 nF Li 0 mH Flameproof WARNING Disconnect power before opening 40 C lt Ta lt 82 5 Ta lt 82 C Typen A WARNING Disconnect power before opening 40 C lt lt 82 6 Ta lt 82 C Refer to table 8 for approval information Table 8 Hazardous Area Classifications for Fisher 3722 Converter IECEx Certification Certification Obtained Entity Rating Temperature Code Ui 30 VDC Intrinsically Safe li 150 4 Tamb lt 82 C Gas Pi 1 25 W T5 Tamb lt 62 C Exia T4 T5 T6 Ga Ci 0nF T6 Tamb lt 47 C Li 0 mH IECEx Flameproof Gas T5 Tamb lt 82 C Exd IIC T5 Gb Typen Gas T6 Tamb lt 82 C
4. CAP SCREW KEY 46 CAP SCREW KEY 45 KEY 92 An actuator stem bracket is supplied with the positioner Assemble the various positioner feedback parts to the stem bracket as follows a Refer to figure 8 Install the roller bearing key 101 on the drive stud key 95 and secure with the E ring key 102 b Refer to figure 9 Attach the drive stud with roller bearing to the drive stud bracket key 98 with 1 4 inch hex nut key 96 lock washer key 100 and flat washer key 103 Place the flat washer between the lock washer and the hex nut The washers and hex nut should all be on the same side of the drive stud bracket as shown in figure 9 The flat washer may be moved to the other side of the drive stud between the drive stud and the drive stud bracket if extra space is required to position the roller bearing near the center of the feedback lever Leave the hex nut loose for later adjustment c Attach the drive stud bracket with drive stud to the actuator stem bracket using two cap screws key 99 two lock washers key 100 and two hex nuts key 96 Leave the hex nuts loose for later adjustment Stroke the actuator from the top stop to the bottom stop and record the travel In steps 3 through 6 refer to the actuator instruction manual for key number locations unless noted otherwise Loosen eight screws and remove the front and back yoke covers keys 18 and 20 Loosen the two cap screws in the stem connecto
5. 150 mA Po lt 1 25 W Ambient temperature T6 at Tamb 47 T5 at Tamb 62 T4 at Tamb 82 C Flameproof The flame path is other than required by EN 60079 1 Contact the manufacturer for information on the dimensions of the flameproof joints Electrical connections are typically made using either cable or conduit e f using a cable connection the cable entry device shall be certified in type of explosion protection flameproof enclosure d suitable for the conditions of use and correctly installed For ambient temperatures over 70 C cables and cable glands suitable for at least 90 C shall be used e If using a rigid conduit connection an Ex d certified sealing device such as a conduit seal with setting compound shall be provided immediately to the entrance of the enclosure For ambient temperatures over 70 C the wiring and setting compound in the conduit seal shall be suitable for at least 90 C Typen No special conditions for safe use Refer to table 7 for approval information Table 7 Hazardous Area Classifications for Fisher 3722 Converter 1 ATEX ATEX Tamb lt 62 C T85 C Tamb lt 47 C Certification Certification Obtained Entity Rating Temperature Code H 1G amp D Intrinsically Safe 4 Tamb lt 82 C Gas Ui 30 VDC T5 Tamb lt 62 C Ex ia IIC T4 T5 T6 Ga li 150 T6 Tamb lt 47 C Pi 1 25W EXC T120 C Tamb lt 82 C T100 C
6. Ex nA IIC T6 Gc 1 These hazardous area classification also apply to 3720 positioners Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Installation To change an existing 3710 positioner into a 3720 positioner install a 3722 electro pneumatic converter figure 3 The 3722 electro pneumatic converter mounts over the input and supply connections of the 3710 positioner Figure 3 Fisher 3722 Electro Pneumatic Converter SUPPLY CONNECTION EXTERNAL GROUNDING se SCREW 1 2 NPT CONDUIT CONNECTION y Pe W6145 1 Be sure all safety procedures have been followed Remove the input and supply connections from the existing 3710 base plate and clean the ports 2 Locate the two O rings key 85 figure 32 and properly lubricate key 82 them Place one O ring in the recessed area surrounding the input port on the positioner base plate Place the other O ring around the supply port 3 Locate the two socket head mounting screws key 84 Properly orient the converter and secure it to the positioner base plate with the mounting screws Be sure the O rings remain in place while securing the converter to the positioner base plate 4 Connect supply pressure to the converter supply port Mounting the Positioner Typically a positioner is ordered with an actuator At the factory the positioner is mounted on the actuator and calibrated However a positioner can be ordered separately and mounted on an exi
7. Use of components not supplied by Emerson Process Management may void your warranty might adversely affect the performance of the instrument and could cause personal injury or property damage Parts Kits Parts List Description Part Number Positioner Common Pa rts refer to figure 31 Pneumatic Positioner Elastomers Kit Contains keys 2 17 19 22 29 30B 31 59 nitrile R3710X00012 Note EPDM R3710X00022 Part numbers are shown for recommended spares only For part Electro Pneumatic Converter Kit numbers not shown contact your Emerson Process Management sales Contains keys 76 77 79 85 88 office nitrile R3722X00012 EPDM R3722X00022 44 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Key Description Part Number Key Description Part Number 1 Spool Valve Ass y 6 mm SST SST GE34480X022 Note Key 13 pointer is used with key 15 indicator Key 13 pointer fits over 2 O ring used between spool valve and the molded slot in the center of key 15 and rests in appropriate quadrant action block 3 req d recess in the surface of key 15 nitrile 12B7253X012 EPDM 12B7253X022 1 i 3 Screw metric slot head cross recessed 13 Pointer 168551 14 Indicator scale For attaching action block to positioner base plate 4 req d 12B7254X012 For attaching spool valve to action block 2 req d 12B7254X012 Note For attaching input module to Key 15 indicator features a molded slot to facilitate adjustment
8. CONDITIONS 30 VDC 20 mADC FOR ENTITY INSTALLATION I S AND N l Vmax gt Voc or Vt Ci Ccable lt Ca Imax gt Isc or It Li Lcable lt La GE28590 B Pi gt Po or Pt 55 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user Fisher and FlowScanner are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent
9. For units w gauges SST fittings Brass fittings For units w o gauges SST fittings Brass fittings Double acting units For units w gauges SST fittings Brass fittings For units w o gauges SST fittings Brass fittings Recommended spare parts 1 Also recommended as a spare if metric fasteners are not available at the installation site Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 3722 Flectro Pneumatic Key Description Part Number Converter refer to figure 32 For use w nozzle restriction key 75 Key Description Nitrile 1C8538X0132 Synthetic rubber 71 Housing aluminum For use w converter module key 89 1 2 14 NPT conduit connection Nitrile 1C8538X0132 Synthetic rubber 72 Cap aluminum 78 Vent plastic stainless steel 73 Screw aluminum not shown 79 O ring used to secure explosion proof cap Used with converter cap key 72 75 Nozzle restriction Nitrile 1H8762X0012 Aluminum synthetic sapphire Synthetic rubber 1H8762X0072 76 O ring 80 Machine screw stainless steel 2 req d Used w nozzle restriction key 75 81 Wire retaining screw pl steel Nitrile Used as a grounding screw for both Synthetic rubber internal and external locations Figure 32 Fisher 3722 Components and Subassemblies APPLY LUB SEALANT 34B0694 A Recommended spare parts SECTION A A includes square washer 2 req d 3720 WITH SUPPLY GAUGE 49 3710
10. and 3720 Positioners January 2015 Instruction Manual D101728X012 Key Description Part Number Key 82 Lithium Grease not furnished with positioner 4 83 Anti seize Sealant not furnished with positioner 84 Cap screw hex socket 18 8 SST For attaching the converter to the positioner base plate 2 req d 85 O ring 2req d Used between positioner base plate and converter Nitrile 11A8741X052 Synthetic rubber 86 Pipe plug hex head Steel Stainless steel 87 Anti seize Lubricant not furnished with positioner 43 88 Filter stainless steel 11B5996X012 89 I P converter module 90 Nameplate converter module 91 Screw self tapping pan head slotted for positioner nameplate 18 8 SST 2 req d 44 Positioner Mounting Parts refer to figure 33 45 Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Note To mount the 3710 or 3720 positioner to an existing actuator replace the actuator cover plate with a new plate which has the three positioner 46 mounting holes and the 5 8 inch purge option knockout plug Contact your Emerson Process Management sales office for any additional parts required for controller mounting Key Description Actuator cover plate aluminum For 1051 1052 size 3002 40 and 1061 size 30 For 1051 size 60 1052 size 60 70 and 1061 size 30 40 60 Description Tie bar 18 8 SST For 105
11. and supply pressures Table 2 Fisher 3722 Electro Converter EMC Summary Results Immunity Port Phenomenon Basic Standard Test Level Fertormanre Criteria 2 Electrostatic Discharge ESD IEC61000 4 2 4 KV contact A 8 kV air 80 to 1000 MHz 10V m with 1 kHz AM at 80 Enclosure Radiated EM field IEC61000 4 3 14000 to 2000 MHz 3V m with 1 kHz AM at 80 A 2000 to 2700 MHz 1V m with 1 kHz AM at 80 E power frequency magnetic IEC 61000 4 8 60 AJm at 50 Hz A Burst fast transients IEC 61000 4 4 1kV A I O signal control Surge IEC61000 4 5 1 kV line to ground only each B Conducted RF IEC61000 4 6 150 kHz to 80 MHz at 3 Vrms A Specification limit 1 of span 1 The information contained in this table also applies to the 3720 positioner 2 A No degradation during testing Temporary degradation during testing but is self recovering Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Table 3 Input Signal Range INPUT SIGNAL RANGE POSITIONER Pneumatic Electronic 3710 E 0 2 to 1 0 bar 3 to 15 psig w 3 to 15 psig span adj ass y W 0 2 to 0 6 bar 3 to 9 psig and no color coding 0 6 to 1 0 bar 9 to 15 psig split ranging 3710 W 0 4 to 2 0 bar 6 to 30 psig w 6 to 30 psig span adj ass y 0 4 to 1 2 bar 6 to 18 psig and red color coding 1 2 to 2 0 bar 18 to 30 psig split ranging E 4 20 mA DC 3720 W
12. connection requires street tee key 56 0 to 30 psig 0 to 0 2 MPa 0 to 2 bar 0 to 60 psig 0 to 0 4 MPa 0 to 4 bar 0 to 160 psig 0 to 1 1 MPa 0 to 11 bar single or double action 11B4040X012 11B4040X022 11B4040X032 56 Street tee qty 1 required to attach each gauge or tire valve to pipe bushing key 68 Steel carbon steel zn pl SST S31600 316 SST 57 Pipe plug for single acting positioners only alloy steel pl SST 62 Tire valve Single action 1 req d or Double action 2 req d 63 Lubricant silicone sealant not furnished with positioner 64 Anti seize sealant not furnished with positioner 65 Lubricant 20W 50 Motor Oil or equivalent not furnished with positioner 66 PTFE Petroleum based lubricant not furnished with positioner 48 Diagnostic Connections refer to figure 16 FlowScanner valve diagnostics system hook up Includes pipe tee pipe nipple pipe bushings connector body and body protector If ordered for units with gauges a stem is also included Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office For 3710 Positioner Single acting units For units w gauges SST fittings Brass fittings For units w o gauges SST fittings Brass fittings Double acting units For units w gauges SST fittings Brass fittings For units w o gauges SST fittings Brass fittings For 3720 Positioner Single acting units
13. connections See figure 23 for the positioner schematic Figure 21 Output Connections OUTPUT CONNECTIONS N 4 9 SORTIES v SORTIEA eo AUSQ A e TS TOP VIEW Use 3 8 inch tubing between the positioner and actuator e For single acting output plug positioner OUTPUT A Refer to the actuator instruction manual for the specific connection for positioner OUTPUT B Connect positioner OUTPUT B to the actuator connection for single acting For Fisher diaphragm actuators this connection is known as the diaphragm casing connection e For double acting output with direct action refer to the actuator instruction manual for the specific connections for positioner OUTPUT A and B Connect positioner OUTPUT A to the actuator cylinder connection where actuator air pressure is exhausted during the initial actuator stroke Connect positioner OUTPUT B to the actuator cylinder connection where supply pressure enters the actuator during the initial actuator stroke For Fisher piston actuators OUTPUT A connects to the lower actuator cylinder connection and OUTPUT B connects to the upper actuator cylinder connection Direct Acting Reverse Acting This section explains changing the positioner action from direct to reverse or reverse to direct With direct action the actuator stem extends as the input signal to the positioner increases With reverse action the actuator stem retracts as the input signal to the positione
14. d For 1 032 sizes 2585 4580 2 req d For 2052 size 1 2 3 2 req d For 1066 size 27 3 req d For 2052 size 1 2 3 3 req d 58 Purge tube 18 8 SST For 1051 1052 sizes 30 2 40 60 67 Indicator steel 1052 size 70 1061 sizes 30 40 60 68 For 1031 size 26 For 1031 size 33 59 O ring purge tube For 1031 size 45 Nitrile 2 req d F1367806562 For 1031 size 60 Synthetic rubber 2 req d 1E5914X0062 For 1031 size 80 Lock Washer For 2052 size 1 2 3 4 req d Recommended spare parts 5 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Figure 33 Positioner Mountings Continued 3710 POSITIONER MOUNTED ON A AA aie 1051 1052 SIZE 30 THROUGH 70 OR 1061 ACTUATOR I ney 3710 POSITIONER MOUNTED ON A 1066 SIZE 75 ACTUATOR 52 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 33 Positioner Mountings Continued 32B8490 A 3710 POSITIONER MOUNTED ON A 1031 SIZE 20 THROUGH 80 ACTUATOR 3710 POSITIONER MOUNTED ON A Es 1032 SIZE 45 THROUGH 680 ACTUATOR 3710 POSITIONER MOUNTED ON A 3380321 8 1032 SIZE 1125 THROUGH 4580 ACTUATOR 53 3710 and 3720 Positioners January 2015 Instruction Manual D101728X012 Mounting Parts for the 67CFR on the 1032 Actuator Key Description Cap screw 2 req d Lock washer 2 req d Hex nut 2 req d Mounting Parts for Mount
15. medium Use of natural gas as the supply medium can result in personal injury or property damage from fire or explosion See figure 13 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 13 Mounting the Positioner Base Plate with Purge Tube PURGE TUBE KEY 58 LONG BLADED SCREW DRIVER THROUGH VENT W6073 The positioner does not have an external vent connection A unit exhausts actuator pressure through a screened hole vent opening figure 12 located in the positioner base plate Do not restrict the vent opening Restricting the vent opening can produce a pressure buildup in the positioner case and degrade positioner performance A purge tube key 58 figure 13 is available as an option when mounting the positioner on selected Fisher actuators One end of the purge tube with an O ring key 59 installs in the actuator cover plate The other end of the purge tube with an O ring installs in the vent opening in the positioner base plate When the purge tube is used it relays actuator exhaust pressure from the positioner into the actuator housing Within the actuator and positioner assembly exhaust pressure takes the following course e The actuator exhaust pressure vents from the actuator through the positioner spool valve into the positioner case e The exhaust pressure then exits the positioner case through the vent opening e The purge tube carries the exhaust pressure into the actua
16. positioners are available for field installation on existing size 30 actuators Specifications Specifications are shown in table 1 Educational Services For information on available courses for 3710 pneumatic positioners or 3720 electro pneumatics positioners as well as a variety of other products contact Emerson Process Management Educational Services Registration Phone 1 641 754 3771 or 1 800 338 8158 e mail education emerson com http www emersonprocess com education Installing the 3722 Converter See figure 3 A WARNING Avoid personal injury from sudden release of process pressure Before mounting the 3720 electro pneumatic positioner or 3722 electro pneumatic converter e Wear protective eyewear gloves and clothing whenever possible e Do not remove the actuator from the valve while the valve is still pressurized e Disconnect any operating lines providing air pressure electric power or a control signal to the actuator Be sure the actuator cannot suddenly open or close the valve Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve e Relieve any supply or output pressure in the existing positioner e Wheninstalling an electro pneumatic positioner or converter in a hazardous area turn off control signals until installation is complete Be sure all safety barriers connections and the converter hous
17. ranged See table 3 for input signal ranges The 3720 electro pneumatic positioner provides a valve position for a milliampere mA direct current DC input signal The positioner may also be split ranged See table 3 Instruction Manual D101728X012 3710 and 3720 Positioners January 2015 Table 1 Specifications Available Configurations 3710 W Single or Bl double acting pneumatic rotary valve positioner 3720 Single or W double acting electro pneumatic rotary valve positioner consisting of a 3710 with a 3722 attached 3722 An electro pneumatic converter that converts a 4 20 mA DC input signal to a 0 2 to 1 0 bar 3 to 15 psig signal for the pneumatic positioner Input Signal 3710 Standard 0 2 to 1 0 bar 3 15 psig or I 0 4 to 2 0 bar 6 to 30 psig Split Range 0 2 to 0 6 bar 3 to 9 psig and 0 6 to 1 0 bar 9 to 15 psig or I 0 4 to 1 2 bar 6 to 18 psig and 1 2 to 2 0 bar 18 to 30 psig 3720 Standard 4 20 mA DC constant current with 30 VDC maximum compliance voltage Split Range Bl 4 12 mA DC or 12 20 mA DC Equivalent Circuit 3720 120 ohms shunted by three 5 6 V zener diodes See figure 15 Output Signal Pneumatic pressure as required by the actuator up to full supply pressure Action Field reversible between direct and W reverse within the pneumatic positioner Supply Pressure 2 Recommended 0 3 bar 5 psig above actuator requirement Maximum 10 3 bar 150 p
18. wrench or other tool to hold the diaphragm connector while removing the machine screw 3 Remove the machine screw key 30E holding the diaphragm connector to the summing beam assembly taking care not to twist the diaphragm connector and diaphragm Use a wrench or other tool to hold the diaphragm connector while removing the machine screw 38 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 4 See figure 27 Separate the summing beam assembly from the input module by removing one of the two machine screws key 20 that hold the flexure retainers which join the summing beam flexure to the input module housing Figure 27 Separating the Summing Beam Assembly from the Input Module Replacing the Input Module Diaphragm See figure 28 1 After removing the input module remove the four machine screws key 20 that hold the input module housing together Remove the diaphragm cover e Note the orientation of the diaphragm key 30B inside the input module e Note the raised center circular area convolution of the diaphragm e Note the orientation of the diaphragm plates The diaphragm plates support the diaphragm and act as travel stops When assembling the input module be sure the diaphragm plates are properly positioned e Pull out the assembly diaphragm diaphragm plates and diaphragm connector Grasp the diaphragm connector with a wrench or other appropriate tool and unscrew the machine scre
19. 1 1052 size 33 and 1066 size 20 use tie bar extension key 44 instead of the tie bar key 42 For 1032 sizes 45 70 185 280 425 680 1125 1370 2585 4580 use the coupling key 60 and spacer key 61 instead of thetie bar key 42 For 1031 size 26 For 1031 sizes 33 45 60 80 For 1051 1052 sizes 30 2 40 60 For 1052 size 20 size 70 For 1061 sizes 30 40 60 68 sizes 80 100 For 1066 size 27 size 75 Mounting plate steel For 1031 sizes 26 33 45 60 80 For 1032 size 45 For 1032 sizes 70 185 280 For 1032 sizes 1125 1370 2585 4580 For 1052 size 20 For 1051 1052 size 33 For 1061 sizes 80 100 For 1066 size 20 27 size 75 For 2052 size 1 2 3 Tie bar extension 18 8 SST For 1051 1052 size 33 For 1066 size 20 For 2052 size 1 2 3 Cap screw hex head steel pl For attaching the mounting plate to the actuator cover plate For 1031 sizes 26 33 45 60 80 2 req d For 1032 size 45 4 req d For 1032 sizes 70 185 280 4 req d For 1032 sizes 425 680 2 req d For 1032 sizes 1125 1370 2 req d For 1032 sizes 2585 4580 2 req d For 1052 size 20 4 req d For 1051 1052 size 33 2 req d For 1066 size 20 size 27 size 75 2 req d For 2052 size 1 2 3 Cap screw hex socket 18 8 SST For attaching the positioner base plate to the mounting plate or actuator cover plate For 1031 sizes 26 33 45 60 80 3 req d For 1032 sizes 45 70 185 280 425 680 3 req d For 1032 sizes 1125 1370 2
20. 14 Field Wiring Diagram Figure 15 Circuit Schematic CONVERTER MODULE TERMINAL BLOCK 4 20 mA FIELD WIRING INDICATING DEVICE 5O 2 gt GROUNDING SCREW 5 6V 5 6V 5 6V 60 OHMS 60 OHMS EARTH SCREW NOTES I gt FOR TROUBLESHOOTING OR MONITORING OPERATION THE INDICATING DEVICE CAN BE A VOLTMETER ACROSS A 250 OHM RESISTOR OR CURRENT METER 2 gt THE 3722 CONVERTER HOUSING FEATURES INTERNAL AND EXTERNAL GROUNDING SCREWS Diagnostic Connections See figure 16 For diagnostic testing of control valve packages valve actuator positioner and accessories special connectors and hardware are available The hardware required for diagnostic connections includes 3 4 NPT pipe nipples and pipe tees with a 1 8 NPT pipe bushing for the connector The connector consists of a 1 8 NPT body and body protector If the diagnostic connectors are ordered for a positioner with gauges 1 8 inch stems are also included Install connectors and hardware between the positioner and the actuator 1 Before assembling the pipe nipple pipe tee pipe bushing actuator piping and connector body apply sealant key 64 to all threads 2 Assemble connectors and hardware Remove standard piping connections if necessary and install the diagnostic connections e 3720 For a diagnostic connection to the instrument pressure output from the converter module remove the 1 8 NPT pipe plug key 86 from the 37
21. 2 370 Cam locknut hex metric 18 8 SST 12B7296X012 47 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Key Description Part Number Key Description Part Number 68 Pipe bushing qty 1 required to attach each pipe tee key 56 to positioner connection 38 Feedback shaft cam shaft Steel carbon steel pl 530300 303 SST SST 531600 39 1 Washer metric 18 8 SST 69 Spacer installed between the feedback asher metric 18 a i haft key 38 and th t b lat For feedback shaft cam shaft key 38 Jana the positioner base plate 1 A Zi 400 Retaining s E d 700 Screw metric slot head cross recessed 18 8 oe em shalt Used to secure key 18 supply cover to key 16 cam shaft key 38 12B7316X012 base ass y 18 8 SST 2 req d n 13B9626X012 41 Vent screen 18 8 SST Note To attach a gauge or tire valve to the positioner or converter use a pipe nipple key 68 and a street tee key 56 53 Supply gauge plastic case W chrome plated brass connection requires street tee key 56 0 to 30 psig 0 to 0 2 MPa 0 to 2 bar 11B4040X012 0 to 60 psig 0 to 0 4 MPa 0 to 4 bar 11B4040X022 0 to 160 psig 0 to 1 1 MPa 0 to 11 bar 11B4040X032 54 nstrument gauge plastic case W chrome plated brass connection requires street tee key 56 0 to 30 psig 0 to 0 2 MPa 0 to 2 bar 11B4040X012 0 to 60 psig 0 to 0 4 MPa 0 to 4 bar 11B4040X022 55 Output gauge plastic case w chrome plated brass
22. 22 converter housing Apply sealant key 83 to the threads of the 1 8 NPT connector body and install it directly into the housing e 3710 3720 For diagnostic connections made up of a pipe nipple pipe tee pipe bushing and connector body turn the pipe tee to position the connector body for easy access when doing diagnostic testing 23 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Figure 16 Diagnostic Connections GAUGE STEM PROVIDED WHEN GAUGE IS SPECIFIED PIPE NIPPLE OUTPUT A PIPE NIPPLE OUTPUT B BODY PROTECTOR BODY PIPE NIPPLE PIPE BUSHING SUPPLY PIPE TEE CONNECTOR BODY lt 1 TO INSTRUMENT NOTE 1 gt REMOVE PIPE PLUG THEN INSTALL CONNECTOR BODY 13B8743 A B2414 3720 POSITIONER GAUGE PIPE NIPPLE N 7 OUTPUT A PIPE NIPPLE STEM PROVIDED OUTPUT B WHEN GAUGE IS SPECIFIED PIPE NIPPLE SUPPLY BODY PROTECTOR ES BODY PIPE BUSHING a PIPE TEE PIPE NIPPLE INSTR 3710 POSITIONER 12B8055 A B2385 24 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Calibration The following calibration procedures are for the 3710 pneumatic positioner adjustment For the 3720 electro pneumatic positioner there are no adjustments within the 3722 converter portion of the positioner All adjustments are accomplished within the pneumatic portion of the positioner A WARNING During cali
23. 4 12 mA DC or 12 20 mA DC split ranging Positioner to Actuator Mountings List The positioner mounts directly to the actuator cover plate of Fisher 1051 1052 and 1061 actuators See table 4 for actuator sizes Figure 2 shows a positioner ready for mounting on a piston rotary actuator A mounting plate key 43 is used to mount the positioner base plate to Fisher 1031 1032 1051 1052 1061 1066 and 2052 actuators See table 4 for actuator sizes The positioner also mounts on a Fisher 585 and 585R size 25 or 50 sliding stem actuator A mounting plate key 43 is used to mount the positioner base plate to the actuator Figure 2 Mounting the Positioner Base Plate MOUNTING SCREW FEEDBACK SHAFT MOUNTING SCREWS W6059 1 TIE BAR EXTENSION KEY 44 POSITIONER MOUNTING PLATE KEY 43 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Table 4 Positioner to Actuator Mountings POSITIONER TO ACTUATOR MOUNTINGS Direct Mounting to Actuator Cover Plate Mounting Plate Required 1031 size 26 33 45 60 and 80 2 123 49 69 ne m D 95 1032 size 45 70 185 280 425 680 1125 1370 2585 and 4580 1061 size 30 40 60 and 68 o ee 1052 size 20 33 1061 size 80 100 1066 size 20 27 and 75 2052 size 1 2 and 3 1 Includes purge tube option 2 The size 30 actuator is no longer manufactured by Emerson Process Management 3710 and 3720
24. 585 4580 3 req d For 1051 1052 sizes 30 2 40 60 1052 size 70 1061 sizes 30 40 60 68 3 req d For 1051 1052 size 33 1052 size 20 1061 sizes 80 100 and 1066 sizes 20 75 3 req d For 1066 size 27 3 req d For 1066 size 75 3 req d For 2052 size 1 2 3 Recommended spare parts 2 The size 30 actuator is no longer manufactured by Emerson 50 Process Management The 3710 positioner is available for field installation on existing size 30 actuators Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 33 Positioner Mountings 42B8478 A 3710 POSITIONER MOUNTED ON A 1051 1052 SIZE 33 ACTUATOR Key Description Part Number Key Description 60 Coupling 18 8 SST 47 Machine screw self tapping 18 8 SST For 1031 sizes 26 33 45 60 80 For attaching the tie bar or tie For 031 SIZES 60 80 bar extension to the actuator hub For 1032 sizes 45 70 185 280 425 680 For 1031 sizes 26 33 45 60 80 2 req d For 1032 sizes 1125 1370 2585 4580 For 1061 sizes 80 100 For 1051 1052 sizes 30 2 40 60 For 1066 size 27 1052 size 70 1061 sizes 30 40 60 68 2 req d 61 Spacer steel f For 1052 size 20 2 req d For 1031 sizes 26 33 45 60 80 2 req d For 1051 1052 size 33 2 req d For 1032512es45 70 185 280 For 1061 sizes 80 100 2 req d 425 680 3 req d For 1066 sizes 20 27 2 req d For 1032 sizes 1125 1370 2 req d For 1066 size 75 2 req
25. CE WITH THE CANADIAN ELECTRICAL CODE PART I 3 FOR ENTITY INSTALLATION I S AND N I Vmax gt Voc Imax gt Isc Ci Ccable lt Ca Li Lcable lt La GE28591 A 54 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 35 FM Loop Schematic for Fisher 3722 Converter Installation Drawing GE28590 HAZARDOUS LOCATION NON HAZARDOUS LOCATION INTRINSIC SAFETY CLASS II III DIV 1 GROUPS A B C D E F G CLASS I ZONE 0 AEx ia IIC NON INCENDIVE CLASS DIV 2 GROUPS A B C D FM APPROVED BARRIER FISHER TYPE 3722 Vmax 30 VDC Imax 150 mA Ci OnF Li 0 mH Pi 1 25 W WARNING FOR INTRINSICALLY SAFE APPLICATIONS THE APPARATUS ENCLOSURE CONTAINS ALUMINUM AND IS CONSIDERED TO CONSTITUTE A POTENTIAL RISK OF IGNTION BY IMPACT AND FRICTION AVOID IMPACT AND FRICTION DURING INSTALLATION AND USE TO PREVENT RISK OF IGNTION NOTES 1 THE INSTALLATION MUST BE IN ACCORDANCE WITH THE NATIONAL ELECTRIC CODE NEC NFPA 70 ARTICLE 504 AND ANSI ISA RP12 6 OR ARTICLE 505 2 THE CLASS 1 DIV 2 APPLICATIONS MUST BE INSTALLED AS SPECIFIED IN NEC ARTICLE 501 4 B EQUIPMENT AND FIELD WIRING IS NON INCENDIVE WHEN CONNECTED TO APPROVED BARRIERS WITH ENTITY PARAMETERS LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER S INSTRUCTIONS MAXIMUM SAFE AREA VOLTAGE SHOULD NOT EXCEED 250 Vrms RESISTANCE BETWEEN BARRIER GROUND AND EARTH GROUND MUST BE LESS THAN ONE OHM NORMAL OPERATING
26. Instruction Manual D101728X012 3710 and 3720 Positioners January 2015 Fisher 3710 and 3720 Valve Positioners and 3722 Electro Pneumatic Converter Contents Introduction 2 Scope of Manual 2 Description sc tette ean ncn yee en 2 Positioner to Actuator Mountings List 5 Specifications 6 Educational Services 6 Installing the 3722 Converter 6 Hazardous Area Classifications and Special Instructions for Safe Use and Installation in Hazardous Areas for 3722 Converter 7 CSA ot Dent E E EDEN g aed Senes 7 idm RE 8 ATEX e dem E 8 oti PUER 10 Installation 11 Mounting the Positioner 11 Installing the 3710 or 3720 Pneumatic Positioner on Size 25 or 50 585 585R Actuators 16 Connections o d eedem red 18 Supply Connection 19 Output Connections 20 Instrument Connection 20 Vent Opening Purge Option and Actuator Vent Connection 20 Connecting the Purge Tube 22 Electrical Connection for the 3720 Positl ner ese RR e eR severe 22 Diagnostic Connections 23 Calibration v a say Der uer SI 25 Setting the Initial Cam Positio
27. Operative Temperature Limits 2 E 40 to 80 C 40 to 180 F 50 to 107 C 58 to 225 F continued 3710 and 3720 Positioners January 2015 Instruction Manual D101728X012 Table 1 Specifications Continued Hazardous Area Classification for 3710 Positioner 3710 pneumatic positioners comply with the requirements of ATEX Group II Category 2 Gas and Dust x u2 ap Electrical Classifications for 3722 Converter Intrinsically Safe Explosion proof Type n Dust Ignition proof Intrinsically Safe Explosion proof Type n Dust Ignition proof Non incendive ATEX Intrinsically Safe Flameproof Type n IECEx Intrinsically Safe Flameproof Type n Refer to Hazardous Area Classifications and Special Instructions for Safe Use and Installation in Hazardous Locations starting on page 7 for additional information Note These classifications also apply to the 3720 positioner Housing Classification for 3722 Converter CSA Type 3 Encl FM NEMA 3 IP54 IP64 IECEx IP54 Mount instrument with vent on side or bottom if weatherproofing is a concern Note These classifications also apply to the 3720 Other Classifications Certifications for 3722 Converter INMETRO National Institute of Metrology Quality and Technology Brazil KGS Korea Gas Safety Corporation South Korea Contact your Emerson Process Management sales office for classification
28. ack shaft and key 17 flanged bearing qty 2 only Key 16 does not include key 18 supply cover key 19 O ring and key 70 screw qty 2 16 Base assy aluminum SST 17 Flanged bearing nylon For feedback shaft key 38 2 req d 18 Supply cover 18 8 SST 19 O ring used under the supply cover key 18 nitrile EPDM 21 Feedback arm assy aluminum SST Includes needle bearing key 25 pressed into the feedback arm 22 Flanged bearing nylon For feedback pivot 23 roller ball bearing metric 18 8 SST The bearing is used as the cam roller attached to the feedback arm ass y key 21 by the shoulder screw key 24 12B7273X012 12B7297X012 24 Shoulder screw metric 18 8 SST 12B7298X012 Note The needle bearing key 25 is pressed into the feedback arm key 21 To install a new needle bearing the existing bearing must be pressed out Consult your Emerson Process Management sales office 25 Needle bearing 18 8 SST 260 Washer metric 18 8 SST 270 Retaining ring e clip metric 18 8 SST 12B7299X012 12B7300X012 45 Instruction Manual 3710 and 3720 Positioners January 2015 D101728X012 Figure 31 Fisher 3710 Components and Subassemblies 3710 WITH BEACON INDICATOR E Na N N TN D LXI Pea et JILHRLNSSCASZLID 0 SST Ny AC PP Y VA ZZ SECTION C C ur SECTION A A 7 E 3 E d
29. ations install rigid metal conduit and a conduit seal no more than 457 mm 18 inches from the converter Personal injury or property damage may result from explosion if the seal is not installed For intrinsically safe installations refer to the loop schematics shown in figures 34 and 35 or to instructions provided by the barrier manufacturer for proper wiring and installation Select wiring and or cable glands that are rated for the environment of use such as hazardous area ingress protection and temperature Failure to use properly rated wiring and or cable glands can result in personal injury or property damage from fire or explosion Wiring connections must be in accordance with local regional and national codes for any given hazardous area approval Failure to follow the local regional and national codes could result in personal injury or property damage from fire or explosion 22 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Use the 1 2 14 NPT conduit connection for field wiring installation Refer to figures 14 and 15 when connecting field wiring from the control device to the converter Connect the positive wire from the control device to the converter s positive terminal and the negative wire from the control device to the converter s negative terminal Do not overtighten the terminal screws Maximum torque is 0 45 Newton meters 0 45 Nem or 4 pounds force per inch 4 Ibfein Figure
30. ator can be aided by moving the actuator slightly away from its up travel stop using a regulated air source If the hole alignment cannot be obtained in this manner temporarily loosen the cap screws that secure the housing to the mounting yoke and shift the housing slightly Do not completely travel the actuator while the cover is removed Tighten the actuator cap screws before continuing 3 Position the new actuator positioner cover plate so the positioner mounting holes on the new cover plate allow placement of the new positioner in the desired orientation Secure the new cover plate to the actuator 4 Install the positioner tie bar key 42 in place of the travel indicator on the actuator hub Note Before installation of the positioner mounting plate key 43 review the mounting drawings figures 4 and 33 Properly align the positioner mounting plate before attaching the mounting plate to the actuator cover plate Note that the three positioner mounting holes must be aligned to match the three mounting screws which will pass through the base of the positioner 5 If the specific actuator requires a positioner mounting plate key 43 install the mounting plate using the cap screws key 45 6 Unscrew the four captive cover screws and remove the cover assembly key 7 from the positioner 7 See figure 6 Loosen the cam locknut key 37 and rotate the feedback shaft key 38 as necessary to align the slot in the feedback shaft end w
31. bration the valve will move To avoid personal injury or property damage caused by the release of pressure or process fluid provide some temporary means of control for the process Setting the Initial Cam Position Before trying any calibration procedure follow these instructions to position the cam key 36 with respect to the valve position 1 Unscrew the four captive cover screws key 8 and remove the positioner cover assembly key 7 2 See figure 17 Inspect the cam key 36 and loosen the cam locknut key 37 3 Disconnect the positioner output tubing at the actuator and attach a regulated air source or other means of positioning the actuator 4 Position the actuator to correspond with the initial valve position at minimum instrument input signal Stroke the actuator to the final valve position and note the direction of actuator shaft rotation Return the actuator to its initial valve position 5 See figure 18 Position the cam on the roller for the desired input signal range for example 0 100 and insure that the arrow on the cam corresponds with the direction of actuator shaft rotation for increasing input signal Tighten the cam locknut leaving a gap of approximately 0 80 mm 0 031 inches between the cam and roller Tighten the cam nut to 3 8 to 9 1 nem 30 to 75 Ibfein 6 Reconnect the output tubing to the actuator Figure 17 Loosening the Cam Locknut Figure 18 Proper Cam Position W5916 25 Instruction Manua
32. certification specific information Pressure Connections 1 4 NPT internal Electrical Connection for 3720 Positioner 1 2 14 NPT conduit connection Rotary Valve Rotation E 90 degrees standard W 60 degrees optional Approximate Weight 3710 2 04 kg 4 5 pounds 3720 2 72 kg 6 0 pounds Declaration of SEP Fisher Controls International LLC declares this product to be in compliance with Article 3 paragraph 3 of the Pressure Equipment Directive PED 97 23 EC It was designed and manufactured in accordance with Sound Engineering Practice SEP and cannot bear the CE marking related to PED compliance However the product may bear the CE marking to indicate compliance with other applicable European positioner Community Directives NOTE Specialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminology 1 For direct action an increasing input signal extends actuator rod For reverse action an increasing input signal retracts actuator rod 2 The pressure and temperature limits in this document and any applicable code or standard limitation should not be exceeded 3 Natural gas should not contain more than 20 ppm of H5S 4 Normal cubic meters per hour 0 C and 1 01325 bar absolute Scfh standard cubic feet per hour 60 F and 14 7 psia 5 Typical values tested using a 1061 size 30 actuator at 4 1 bar 60 psig supply pressure Performance may vary with other actuator types
33. d 2 Install the cam roller key 23 and shoulder screw key 24 Be sure the cam roller rotates freely 3 Place the flanged bearing key 22 and feedback arm assembly on the feedback pivot Place the washer key 26 on the pivot and install the retaining ring e clip key 27 to secure the feedback arm on the feedback pivot If necessary attach the cam key 36 and cam locknut key 37 to the feedback shaft Perform the calibration procedures in this manual 3722 Converter Maintenance Replacing the Converter Primary O Ring and Filter Key numbers used in this procedure are shown in figure 32 1 Locate and remove the nozzle restriction adaptor assembly key 75 2 Inspect and replace if necessary the O rings keys 76 and 77 Apply lubricant key 82 to the O ring before replacing 3 Inspect and replace the filter cartridge key 88 42 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Disassembling the 3722 Converter See figure 31 for key number locations 1 2 Turn off electrical power to the converter Release all supply pressure from the positioner Remove the cap key 72 and disconnect the field wiring from the terminal block e Ifa grounding wire is used inside the housing compartment disconnect the wire from the internal housing ground screw key 81 e f an external grounding wire is used disconnect the grounding wire from the external ground screw key 81 To r
34. d optional equipment such as filter regulator and bypass valve Positioner pressure and electrical connection locations are shown in figure 12 All pressure connections are 1 4 NPT internal Use 3 8 inch tubing or 1 4 NPT pipe for all tubing connections Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 12 Connections OUTPUT CONNECTIONS INPUT SUPPLY CONNECTION TOP VIEW VENT INPUT CONNECTIONS M20 CABLE r GLAND 6 RIGHT SIDE VIEW S VENT e j OPENING 3720 POSITIONER Q UR a U L RIGHT SIDE VIEW REAR VIEW 34B0693 A 2386 1 3710 POSITIONER The conduit connection to the converter is 1 2 14 NPT The positioner does not have a remote vent connection Refer to the section on vent opening purge option and actuator vent connection for instructions about a remote vent connection Supply Connection Severe personal injury or property damage may occur if the instrument supply medium is not clean dry and oil free While use and regular maintenance of a filter that removes particles larger than 40 micrometers in diameter will suffice in most applications check with an Emerson Process Management field office and industry instrument air quality standards for use with corrosive gas or if you are unsure about the proper amount or method of a
35. e If sufficient adjustment is not available in the scale the actuator might be installed incorrectly 6 If the internal scale of the beacon indicator is not properly aligned remove the four machine screws that hold the beacon indicator key 10 to the positioner cover Properly orient the beacon cover and replace the screws Make sure the beacon cover and scale are now properly aligned by moving the valve Changing Positioner Action Avoid personal injury or equipment damage from sudden release of process fluid Before changing positioner action e Wear protective eyewear gloves and clothing whenever possible e Do notremove the actuator from the valve while the valve is still pressurized e Disconnect any operating lines providing air pressure electric power or a control signal to the actuator and accessories Be sure the actuator cannot suddenly open or close the valve Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve 28 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 e Ventthe actuator loading pressure Uselock out procedures to be sure that the above measures stay in effect while you work on the equipment e Check with your process or safety engineer for any additional measures that must be taken to prevent against process media Single Acting Double Acting See figure 21 for positioner output
36. e Fisher 3722 electro pneumatic converter Refer to separate instruction manuals for information on the actuator control valve and other accessories Do not install operate or maintain a 3710 pneumatic positioner a 3720 electro pneumatic positioner or a 3722 electro pneumatic converter without being fully trained and qualified in valve actuator and accessory installation operation and maintenance To avoid personal injury or property damage it is important to carefully read understand and follow all of the contents of this manual including all safety cautions and warnings If you have any questions about these instructions contact your Emerson Process Management sales office before proceeding Description The 3710 pneumatic positioner and 3720 electro pneumatic positioner are used with either diaphragm actuators spring return or piston rotary actuators spring return or double action as shown in figure 1 These positioners provide a valve ball or disk position for a specific input signal These positioners can easily be configured to provide single or double action output for rotary actuators The 3710 pneumatic positioner accepts a pneumatic input signal The 3720 electro pneumatic positioner accepts a milliampere mA direct current DC input signal Refer to table 1 for an explanation of type numbers The 3710 pneumatic positioner provides a valve position for a standard pneumatic input signal The positioner may also be split
37. emove the converter module remove the two screws key 80 and pull the module out of the housing Inspect the O ring key 77 and replace it if necessary e f you are removing the converter assembly from the pneumatic positioner continue with steps 4 and 5 Or e f you are replacing the converter module only obtain a replacement converter module and refer to the procedure for assembling the converter After replacing the converter module calibrate the pneumatic portion of the positioner by performing the calibration procedures There is no converter module calibration 4 Disconnect the supply tubing output tubing and conduit from the converter Remove the two socket head screws key 84 and remove the converter from the positioner base plate key 16 figure 31 Inspect the two O rings key 85 and replace them if necessary Apply lubricant 82 to the O rings before replacement Assembling the 3722 Converter Refer to figure 32 for key number locations unless otherwise indicated while assembling the converter If the converter was removed from the pneumatic positioner re install using the following instructions 1 Inspect the O rings key 85 and replace if necessary If the O rings are in good condition apply lubricant key 82 to the O rings and install them in the recessed areas surrounding the input and supply ports on positioner base plate key 16 figure 31 Be sure the O rings remain in place Apply seala
38. en the two machine screws Besure the spool head and summing beam remain engaged but do not bind up over the entire operating range of the input module Assembling the Feedback Shaft Cam Shaft 1 Inspect the feedback shaft key 38 Be sure the shaft is free from any damage Inspect the flanged bearings key 17 and spacer key 69 Replace if necessary Properly install the flanged bearings in the positioner base plate Install the spacer on the feedback shaft Insert the shaft with spacer through the bearings and base plate Make sure the feedback shaft rotates freely Install the washer key 39 and retaining ring e clip key 40 that hold the feedback shaft in place Attach the cam key 36 and cam locknut key 37 5 Setthe initial cam position following the procedures given in this manual if necessary Replacing the Feedback Arm Assembly and Span Adjuster Assembly Note The zero adjustment locknut and zero adjustment knob are identical parts key 35 Note To identify the span adjuster assembly for 0 4 to 2 0 bar 6 to 30 psig input range red color coding appears on the range spring 1 Make sure the zero adjustment knob key 35 is installed on the span adjustment shaft threaded rod before installation into the zero adjustment pivot Install the span adjustment assembly by sliding the threaded rod through the zero adjustment pivot on the feedback arm Install the zero adjuster locknut on the threaded ro
39. epends upon the severity of service conditions The following procedure describes disassembly and reassembly of the positioner When inspection or repairs are required disassemble only those parts necessary to accomplish the task When reassembly is complete adjust the positioner as described in the Calibration section of this manual A WARNING Avoid personal injury or equipment damage from sudden release of process fluid Before performing any positioner maintenance e Wear protective eyewear gloves and clothing whenever possible when performing any maintenance operation e Do not remove the actuator from the valve while the valve is still pressurized e Disconnect any operating lines providing air pressure electric power or a control signal to the actuator and accessories Be sure the actuator cannot suddenly open or close the valve e Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve e Vent the actuator loading pressure e Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment e Check with your process or safety engineer for any additional measures that must be taken to protect against process media Positioner Maintenance Replacing the Standard or Beacon Indicator 1 Remove the positioner cover assembly key 7 2 Remove the four machine screws key 8 that hold the indicator
40. for safe use Refer to table 6 for approval information Table 6 Hazardous Area Classifications for Fisher 3722 Converter FM United States Class Zone 2 AEx nA IIC T5 Certification Body Certification Obtained Entity Rating Temperature Code Intiinsically Safe 4 Tamb lt 82 C Class Zone 0 AEx ia IIC T4 T5 T6 per drawing GE28590 figure 35 32 pao Pi 1 25W T5 Tamb lt 62 C Class Il III Division 1 GP A B C D E F G T4 T5 T6 E t per drawing GE28590 figure 35 CIE Je amb 4756 Li 0mH Explosion proof FM Class Zone 1 AEx d IIC T5 T5 Tamb lt 82 C Class Division GP A B C D T5 Typen T5 Tamb 82 C Class I Division 2 GP A B C D T5 Class Il Division 1 GP E F G T5 Class II Division 2 GP F G T5 T5 Tamb 82 C 1 These hazardous area classification also apply to 3720 positioners ATEX Standards Used for Certification EN 60079 0 2012 EN 60079 1 2007 EN 60079 11 2012 EN 60079 15 2010 EN 60079 31 2009 EN 61241 0 2006 EN 61241 1 2004 EN 61241 11 2006 3710 and 3720 Positioners January 2015 Instruction Manual D101728X012 Special Conditions for Safe Use Intrinsically Safe This equipment is intrinsically safe and can be used in potentially explosive atmospheres The electrical parameters of certified equipment which can be connected to the device must not exceed one of these following values Ug lt 30 VDC Ip lt
41. g a positioner or converter in a hazardous area turn off control signals until installation is complete Be sure all safety barriers connections and the converter housing cap and O ring are properly installed before supplying a control signal to the unit Check with your process or safety engineer for any additional measures that must be taken to protect against process media A WARNING The positioner can provide full supply pressure to any connected equipment To avoid personal injury and equipment damage make sure supply pressure never exceeds the maximum safe working pressure of any connected equipment Note The positioner mounts directly to the actuator cover plate of several Fisher actuators See table 4 To directly mount the positioner to an existing Fisher actuator you must use an actuator cover plate with three positioner mounting holes and the 5 8 inch purge option knockout plug See the parts list for the specific actuator cover plate required above to integrally mount the positioner See figures 4 and 33 for positioner mounting drawings Note To mount the positioner to an actuator with an existing Fisher 3610 positioner remove the 3610 positioner and replace it with an appropriate metal cover plate and four cap screws For assistance contact your Emerson Process Management sales office 12 Instruction Manual D101728X012 3710 and 3720 Positioners January 2015 Figure 4 Typical Positioner Actuator Combinatio
42. he valve actuator to mid travel Adjust the drive stud location vertically so that the feedback lever is perpendicular to the stem Tighten the hex nut attached to the drive stud 16 Referto figure 11 Adjust the position of the drive stud bracket so that the center of the roller bearing aligns with the appropriate travel mark on the feedback lever 17 Tighten the cap screws to secure the drive stud bracket to the stem bracket If necessary readjust the drive stud position to keep the feedback lever perpendicular to the stem 18 Make the output supply instrument and vent connections as described in the Connection section Calibrate the positioner by performing the procedures in the Calibration section 19 Replace the actuator front and back yoke covers Discard the actuator blanking plate and four screws Figure 10 Mounting Plate Positioned on Actuator Figure 11 Positioning Drive Stud in Feedback Lever FEEDBACK LEVER KEY 94 DRIVE STUD AND ROLLER BEARING Valve Travel W8461 Connections The positioner is capable of providing full supply pressure to connected equipment To avoid personal injury and equipment damage make sure the supply pressure never exceeds the maximum safe working pressure of any connected equipment To complete the installation of a positioner connect tubing and fittings between the positioner and the actuator The fittings tubing and mounting parts required depend on the type number an
43. ing Positioner on 585 and 585R Actuators refer to figures 7 8 and 9 unless otherwise noted 38 Feedback Shaft see figure 31 43 Mounting Plate 45 Cap Screw 46 Cap Screw 61 Spacer 92 Lock washer 93 Cap Screw 94 Feedback Lever 95 Drive Stud 96 Hex Nut 97 Mounting Bearing Loop Schematics Key Description 98 Drive Stud Bracket 99 Cap Screw 100 Lock washer 101 Roller Bearing 102 ERing 103 Washer Pipe Nipple for mounting the 67 Filter Regulator Fittings Note Contact your Emerson Process Management sales office for descriptions of fittings including materials of construction Specify quantity of fittings required 50 Elbow 51 Connector 52 Swivel This section includes loop schematics required for wiring of intrinsically safe installations If you have any questions contact your Emerson Process Management sales office Figure 34 CSA Loop Schematic for Fisher 3722 Converter Installation Drawing GE28591 HAZARDOUS LOCATION INTRINSIC SAFETY CLASS II III DIV 1 GROUPS A B C D E F G NON INCENDIVE CLASS I DIV 2 GROUPS A B C D FISHER TYPE 3722 Vmax 30 VDC Imax 150 mA Li 0 mH Pi 1 25W NOTES NON HAZARDOUS LOCATION CSA APPROVED BARRIER 1 BARRIERS MUST BE CSA CERTIFIED WITH ENTITY PARAMETERS AND ARE TO BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURERS I S INSTALLATION INSTRUCTIONS 2 EQUIPMENT SHALL BE INSTALLED IN ACCORDAN
44. ing cap and O ring are properly installed before supply a control signal to the unit Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment e Donotopen where an explosive dust atmosphere is present e Check with your process or safety engineer for any additional measures that must be taken to protect against process media A WARNING The positioner can provide full supply pressure to any connected equipment To avoid personal injury and equipment damage make sure supply pressure never exceeds the maximum safe working pressure of any connected equipment Hazardous Area Classifications and Special Instructions for Safe Use and Installation in Hazardous Locations for 3722 Converter Note These Special Instruction for Safe Use and Installation in Hazardous Location also apply to 3720 positioners Certain nameplates may carry more than one approval and each approval may have unique installation wiring requirements and or conditions of safe use These special instructions for safe use are in addition to and may override the standard installation procedures Special instructions are listed by approval Note This information supplements the nameplate markings affixed to the product Always refer to the nameplate itself to identify the appropriate certification Contact your Emerson Proce
45. ir filtration or filter maintenance 3720 positioners and 3722 converters do not meet third party approvals for use with natural gas as the supply pressure medium Use of natural gas as the supply medium can result in personal injury or property damage from fire or explosion See figure 12 Connect a clean dry oil free noncorrosive air source to the supply connection of the positioner Recommended supply line size is 3 8 inch tubing or 1 4 NPT pipe Use of an appropriate supply air filter or filter regulator is recommended Refer to the positioner specifications table 1 for supply pressure requirements 19 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Supply pressure must not exceed the following limits e Forthe positioner do not exceed the maximum pressure rating of 10 3 bar 150 psig e For actuator pressure refer to the appropriate actuator instruction manual for maximum allowable pressures e Forthe valve body assembly do not exceed the maximum allowable torque or thrust of the specific valve Output Connections See figure 12 Use 3 8 inch tubing between the actuator and positioner For diaphragm rotary actuators single action output from the positioner Plug OUTPUT A Connect OUTPUT B to the diaphragm casing connection For piston rotary actuators double action output from the positioner To extend the actuator stem with increasing instrument input signal connect OUTPUT A to the lower act
46. ith the tie bar on the actuator hub Tighten the cam locknut 8 Align the positioner with the mounting holes in the new actuator cover plate or positioner mounting plate Be sure that the tie bar fits securely into the feedback shaft end slot Secure the positioner to the actuator cover plate or mounting plate using the hex socket head cap screws key 46 9 Before installing the positioner cover properly align the valve position indicator standard low profile indicator or optional beacon indicator Follow the standard or beacon indicator alignment procedure given in this instruction manual Then install the positioner cover assembly Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 5 Typical Piston Actuator Fisher 1061 W6147 1 TIE BAR MOUNTING PLATE REMOVED REAR VIEW POSITIONER BASE PLATE AND MOUNTING AREA Figure 6 Loosening the Cam Locknut DITS E LJE W5916 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Installing the 3710 or 3720 Pneumatic Positioner on Size 25 or 50 585 and 585R Actuators Refer to figures 7 8 and 9 for key number locations unless noted otherwise Figure 7 Typical Fisher 3710 Positioner Mounted on a 585 Actuator SPACER KEY 61 CAP SCREW KEY 99 MOUNTING PLATE LOCK WASHER KEY 43 KEY 100 DRIVE STUD BRACKET KEY 98 CAP SCREW HEX NUT KEY 93 KEY 96 MOUNTING BEARING KEY 97
47. l 3710 and 3720 Positioners D101728X012 January 2015 Zero and Span Adjustments See figure 19 Figure 19 Features and Adjustments T ACTION BLOCK gt SPAN ADJ ASSY MOUNTING SCREW HOLE NAMEPLATE AREA SPOOL VALVE SCREENED VENT OPENING ZERO ADJ PIVOT INPUT MODULE SPAN ADJ SHAFT THREADED ROD ZERO ADJUSTER LOCK NUT ZERO ADJUSTER SUMMING BEAM ASSEMBLY SUMMING BEAM FLEXURE MOUNTING SCREW HOLE MOUNTING CAM FEEDBACK ARM ASSY SCREW HOLE NOTES 1 gt THE SPAN ADJ ASSY IS MADE UP OF THE RANGE SPRING SPAN ADJ SHAFT THREADED ROD AND SPAN ADJ KNOB 2 gt THE SPAN AD ASSY FEATURES RED COLOR CODED RANGE SPRING FOR A 6 TO 30 PSIG INPUT SIGNAL W5947 1 To start this procedure if necessary unscrew the four captive cover screws key 8 and remove the cover assembly key 7 2 Apply supply pressure 3 Provide a way to check the input signal Apply the minimum input signal For example e Fora3710 pneumatic positioner if the input signal range is 0 2 to 1 0 bar 3 to 15 psig apply 0 2 bar 3 psig e Fora 3720 electro pneumatic positioner if the input signal range is 4 20 mA apply 4 mA to the 3722 converter Note The zero adjustment locknut and zero adjustment knob are identical parts key 35 4 Loosen the zero adjustment locknut key 35 and turn the zero adjustment knob key 35 until the actuator moves the valve to the proper position This valve position must correspond t
48. n 25 Zero and Span Adjustments 26 Standard or Beacon Indicator Alignment 27 Changing Positioner Action 28 Single Action Double Action 29 Direct Action Reverse Action 29 Split Range Operation 30 Changing the Spool Valve To Increase Positioner Output Capacity 30 Changing the Span Adjuster Assembly To Change Positioner Input Range 32 Principle of Operation 33 Figure 1 Positioners SUPPLY CONNECTION W6144 3720 POSITIONER MOUNTED ON A FISHER 1052 ACTUATOR 6 W6058 1 3710 POSITIONER MOUNTED ON A FISHER 1066 ACTUATOR rd w EMERSON www Fisher com Process Management 3710 and 3720 Positioners January 2015 Instruction Manual D101728X012 Contents cont d Mairiteriance uos e orgie norte tu eT 34 Positioner Maintenance 34 Replacing the Standard or Beacon Indicator 34 Removing the 3722 Converter 35 Removing the Positioner 35 Removing the Feedback Arm Assembly 36 Disassembling the Feedback Arm Assembly and Span Adjuster Assembly 37 Removing the Feedback Shaft Cam Shaft 37 Disassembling the Spool Valve Action Block ANG Gasket odi ere uywaku 37 Disassembling the Input Module and Summing Beam Assembly 38 Replacing the Inpu
49. ndard Indicator 22 FEEDBACK SHAFT CAM SHAFT KEY 38 NOTES gt RETAINING RING E CLIP KEY 12 IS NOT SHOWN 22 THE SHAFT OF THE INDICATOR KEY 15 PASSES THROUGH THE POSITIONER COVER AND FITS OVER THE END OF THE FEEDBACK SHAFT CAM SHAFT KEY 38 W6061 a INDICATOR SCALE KEY 14 1 INDICATOR KEY 15 3 Inspect the indicator pointer and scale Make sure the proper valve position is shown Follow the procedures given in this instruction manual to move the valve from fully opened to fully closed Make sure the indicator properly displays the valve position If the indicator is not properly aligned continue with the following procedure 4 If the indicator pointer and indicator scale are slightly out of alignment loosen the four machine screws key 3 that hold the indicator scale to the positioner cover Turn the scale to properly align it with the pointer Tighten the four screws and move the valve to confirm proper valve position indication 5 If the pointer in the standard low profile indicator is positioned in the wrong quadrant loosen the four machine screws key 8 that hold the indicator scale key 14 to the positioner cover Remove the indicator scale Then carefully lift the pointer key 13 from the indicator key 15 Place the pointer in the proper position and re install the indicator scale and screws Make sure the indicator scale and pointer are now properly aligned by moving the valv
50. nge spring falls away from the summing beam Note The feedback pivot cannot be removed from the positioner base plate Figure 25 Cam Removed Range Spring Free From Summing Beam W6062 3 Remove the retaining ring E clip key 27 which holds the feedback arm key 21 onto the feedback pivot Remove the washer under the retaining ring and pull the feedback arm from the pivot 4 Remove the flanged bearing key 22 from the feedback pivot or from the feedback arm Inspect and replace the bearing if necessary 36 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Disassembling the Feedback Arm Assembly and Span Adjuster Assembly Note The zero adjustment locknut and zero adjustment knob are identical parts key 35 Note To identify the span adjuster assembly for 0 4 to 2 0 bar 6 to 30 psig input range red color coding appears on the range spring 1 Remove the feedback arm assembly and flanged bearing key 22 from the feedback pivot in the positioner base plate Then remove the span adjuster assembly key 4 by unscrewing the zero adjuster locknut key 35 and sliding the span adjustment shaft threaded rod from the zero adjustment pivot on the feedback arm key 21 2 Inspect the flanged bearing If the bearing shows signs of wear or damage replace it 3 Inspect the zero adjustment pivot Be sure the pivot rotates freely If necessary remove the retaining ring e clip key 34 washer ke
51. ns 42B8466 A 3710 POSITIONER MOUNTED ON A 1061 SIZE 30 ACTUATOR 42B8466 A 3720 POSITIONER MOUNTED ON A 1061 SIZE 30 ACTUATOR NOTES FIGURE 33 SHOWS ADDITIONAL POSITIONER ACTUATOR COMBINATIONS 1 ACTUATOR COVER PLATE REQUIRED WHEN REPLACING AN INSTALLED 3610 POSITIONER 13 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 1 See figure 5 for a typical actuator Remove the actuator travel indicator machine screws travel indicator and actuator cover cap screws Note When removing the actuator cover plate take care not to change the position of the rod end bearing on the end of the turnbuckle inside the actuator housing 2 If necessary install a new cover plate a Remove the existing cap screws and actuator cover plate from the actuator housing b Remove the retaining ring e clip and hub from the cover plate c Install the hub and retaining ring into the new actuator positioner cover plate Note Position the actuator cover plate so the positioner mounting holes on the new cover plate allow placement of the positioner in the desired orientation Actuator cover alignment on the 1052 actu
52. nt key 64 or 83 to the two socket head screws key 86 Then properly align the converter and attach it to the positioner base plate using the socket head screws Be sure the O rings remain in place Tighten the socket head screws Apply sealant key 64 or 83 and install pipe bushings key 68 pipe tees key 56 gauges key 53 54 or 55 pipe plugs key 57 or 86 tire valves key 62 or diagnostic connectors as applicable to the converter Ifthe converter module was removed from the housing apply lubricant key 82 to the O ring key 77 and insert the converter module into the housing Replace the two screws key 80 and tighten them Connect the supply tubing output tubing and conduit to the converter Connect the wiring to the terminal block by using installation procedures e f aninternal grounding wire is used inside the housing compartment connect the wire to the internal housing ground screw key 81 e f an external grounding wire is used connect the grounding wire to the external ground screw key 81 Inspect the O ring key 79 inside the converter cap key 72 Replace if necessary Lubricate key 82 the O ring and install it inside the cap Lubricate key 87 the threads of the cap and replace it Ifthe converter module was replaced calibrate the pneumatic portion of the positioner by performing the procedures in the Calibration section of this manual Do not attempt to calibrate the con
53. o 1 0 bar 9 to 15 psig e 0 4 to 1 2 bar 6 to 18 psig e 1 2 to 2 0 bar 18 to 30 psig 1 Turn off supply pressure Remove the positioner cover assembly key 7 2 Loosen the cam locknut key 37 Rotate the cam to the desired split range value either 0 5025 or 50 100 3 Before tightening the cam locknut perform the cam alignment procedure given in this manual 4 Turn on supply pressure Perform the zero and span adjustment procedure given in this manual Use the proper input signal range to match the cam split range value selected in step 2 above 5 Replace the positioner cover assembly Changing the Spool Valve Avoid personal injury or equipment damage from sudden release of process fluid Before changing the spool valve e Wear protective eyewear gloves and clothing whenever possible e Do not remove the actuator from the valve while the valve is still pressurized e Disconnect any operating lines providing air pressure electric power or a control signal to the actuator and accessories Be sure the actuator cannot suddenly open or close the valve Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve 30 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 e Ventthe actuator loading pressure e Use lock out procedures to be sure that the above measures stay in effect while you work on the equi
54. o the minimum input signal 26 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Tighten the zero adjustment locknut before proceeding to step 5 5 Slowly increase the input signal until the input reaches the maximum input signal Observe the actuator travel and valve position as the input increases Determine the actuator valve position at the maximum input signal 6 After observing the actuator valve travel at maximum input signal return the input signal to the minimum input signal before turning the span adjustment knob e fthe actuator valve travel observed in step 5 stopped short of the required valve position at maximum input signal increase the actuator valve travel by rotating the positioner span adjustment knob toward the zero adjustment nut key 35 to add active spring coils to the range spring e f the actuator valve travel observed in step 5 reaches the required valve position before the input signal reaches the maximum input signal decrease the actuator valve travel by rotating the positioner span adjustment knob away from the zero adjustment nut key 35 to remove active spring coils from the range spring 7 After turning the span adjustment knob to change actuator travel re zero the positioner using the procedure given in steps 4 and 5 above Note The outputs of a properly calibrated positioner will be in the saturated condition zero pressure or full supply when the valve is fully o
55. ocation or rise of the cam which is attached to the feedback shaft When the two opposing forces are equal or at a steady state the summing beam holds the spool in a neutral position At steady state a small flow of air passes from supply through both outputs of the spool valve to the actuator holding the actuator at a constant position At the same time another small flow of air exhausts out each end of the spool valve When the input pressure is increased to the diaphragm of the input module the diaphragm strokes down increasing the effective force from the input module and compressing the range spring The summing beam moves the spool down in the spool body opening output port B to supply airto the left side of the actuator At the same time output port A of the spool valve opens allowing the right side of the actuator to vent to atmosphere The piston in the actuator moves to the right rotating the feedback shaft and cam counterclockwise This rotation causes the feedback lever to rotate clockwise increasing the compression on the range spring These rotations continue until the additional force from the spring balances with the input module force on the summing beam When the forces are equal the summing beam returns to its steady state or neutral position and the actuator is held at a new position Maintenance Parts are subject to normal wear and must be inspected and replaced as necessary The frequency of inspection and replacement d
56. ock and Gasket 1 Place the action block gasket key 29 on the mounting area found on the positioner base plate Place the action block key 28 on the gasket and secure it to the base plate using the four machine screws key 3 2 Inspect the three O rings key 2 found between the spool valve key 1 and the action block Replace the O rings if necessary Note See figure 26 Handle the spool valve body and spool with care The body and spool are manufactured to precise tolerances and are prepared as a matched set 3 Be sure the spool valve is ready for service Clean or replace it if necessary Note See figure 30 Before securing the spool valve make sure the spool head makes proper contact with the end of the summing beam 4 See figure 30 Position the spool valve on the action block Make sure the spool extending from the spool valve body properly engages the summing beam Start the two machine screws key 3 so the spool valve is loosely held in position on the action block 41 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Before tightening the machine screws holding the spool valve make sure the end of the summing beam does not contact the spool Rather the summing beam should contact the spool head If necessary adjust the position of the spool valve on top of the action block making sure the summing beam does not bind on the spool throughout the full travel of the summing beam Tight
57. of the positioner base plate 4 req d 12B7254X012 Note To identify the span adjuster ass y for 0 4 to 2 0 bar 6 to 30 psig input range red color coding appears on the range spring 4 Span adjuster ass y SST plastic 0 2 to 1 0 bar 3 to 15 psig no color coding 0 4 to 2 0 bar 6 to 30 psig color coded red 5 Nameplate positioner 6 Screw self tapping pan head slotted for positioner nameplate 18 8 SST 2 req d 7 Cover ass y includes screws key 8 and O rings key 7B plastic SST W nitrile O rings W EPDM O rings 7B O ring used to hold positioner cover screws 4 req d nitrile 12B7268X012 EPDM 12B7268X022 8 Screw metric slot head cross recessed 18 8 SST For indicator cover 4 req d For positioner cover captive 4 req d 9 Hex nut 18 8 SST 4 req d For indicator cover screws key 8 10 Beacon indicator 11 Extension feedback shaft for use with beacon indicator 12B7267X012 12B7267X012 12 Retaining ring E clip metric SST Used to secure the indicator For standard indicator use inside the positioner cover For beacon indicator use outside the positioner cover 1F6252X0012 1F6252X0012 Recommended spare parts 1 Also recommended as a spare if metric fasteners are not available at the installation site indicator during installation of the positioner cover 15 Indicator w molded screwdriver slot plastic w nitrile O ring key 15A Note Key 16 base ass y includes key 38 feedb
58. pen or closed 8 Increase the input signal until the input reaches the maximum input signal Observe the actuator valve travel as the input increases Repeat steps 3 through 8 until the actuator travel corresponds to the input signal range 9 Properly align the indicator and replace the positioner cover assembly Standard or Beacon Indicator Alignment Note The standard low profile indicator consists of the indicator cover key 14 indicator key 15 with internal retaining ring e clip key 12 and separate pointer key 13 recessed into the indicator An O ring key 15A fits over the molded screwdriver slot in the indicator to retain the pointer The optional beacon indicator consists of an external unit key 10 with external retaining ring key 12 and extension shaft key 11 See figure 20 1 Locate the indicator extension shaft key 11 or key 15 inside the front cover To align the indicator rotate the indicator extension shaft to match the position of the feedback shaft extending from the cam key 36 2 Install the cover assembly key 7 so that the indicator extension shaft joins with the feedback shaft The standard indicator key 15 features a molded screwdriver slot that protrudes through the indicator cover key 14 If necessary use a small Phillips head screwdriver to align the indicator with the feedback shaft 27 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Figure 20 Sta
59. pment e Check with your process or safety engineer for any additional measures that must be taken to prevent against process media 1 Turn off supply pressure Release actuator pressure Remove the positioner cover assembly key 7 Note Handle the spool valve body and spool with care The body and spool are manufactured to precise tolerances and are prepared as a matched set 2 Unscrew the two machine screws key 3 that hold the spool valve key 1 onto the action block key 28 Remove the spool valve taking care when separating the spool from the spool flexure on the summing beam 3 Inspect the three O rings key 2 found between the spool valve and the action block Remove and replace the O rings if necessary Note Handle the spool valve body and spool with care The body and spool are manufactured to precise tolerances and are prepared as a matched set 4 Check the function of the new spool valve to be installed The spool should slide freely in the valve body Note See figure 22 Before securing the spool valve make sure the spool head makes proper contact with the end of the summing beam 5 See figure 22 Position the spool valve on the action block Make sure the spool extending from the spool valve body properly engages the summing beam Start the two machine screws key 3 so the spool valve is loosely held in position on the action block 6 Before tightening the machine screws holding the spool valve make s
60. r assembly key 15 and remove the stem connector Separate the actuator piston stem key 12 from the valve plug stem Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 Figure 8 Drive Stud and Roller Bearing Assembly Figure 9 Drive Stud Bracket with Drive Stud and Roller Bearing Assembly DRIVE STUD BRACKET KEY 98 LOCK ROLLER BEARING WASHER DRIVE STUD KEY101 E RING KEY 100 KEY 95 KEY 102 FLAT WASHER DRIVE STUD KEY 1103 AND ROLLER BEARING HEX NUT ee KEY 96 Note Before performing the next step position the valve plug stem at the lower end of its travel Position the actuator stem at the upper travel stop Check for sufficient clearance between the actuator stem and the valve stem to allow removing the stem bracket assembly If there is insufficient clearance remove the actuator from the valve Loosen the stem bracket retainer key 14 and let it slide down over the valve plug stem Remove the stem bracket assembly key 13 Install the stem bracket assembly with drive stud and drive stud bracket on the actuator stem Align the stem bracket assembly so that it will be parallel with the back yoke cover Install the stem bracket retainer and tighten to 68 Nem 50 Ibfeft If the actuator was removed from the valve install the actuator on the valve Do not attach the stem connector at this time 7 Attach the mounting bearing key 97 to the mounting plate key 43 with three he
61. r increases 29 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 See figure 21 1 Turn off supply pressure Reverse the piping connections between the actuator and the positioner output connections OUTPUT A and OUTPUT B e Forsingle acting output disconnect piping from OUTPUT B Unplug OUTPUT A and connect the piping to it Plug OUTPUT B e For double acting output disconnect piping from both positioner outputs Connect piping from OUTPUT A to OUTPUT B Connect piping from OUTPUT B to OUTPUT A It may be necessary to bend new lengths of tubing if rigid tubing is used 2 After reversing the piping connections remove the positioner cover assembly key 7 and reverse the cam key 36 To reverse the cam unscrew the cam locknut key 37 Remove the cam turn it over and reinstall it making sure the camis positioned for the proper input signal range 3 Set the initial cam position following the cam alignment procedure given in this manual Tighten the cam locknut 4 Turn on supply pressure Perform the zero and span adjustment procedure given in this manual 5 Replace the positioner cover assembly Split Range Operation The positioner can be used for split range operation with the input signal from a single control device split between two positioner actuator control valve packages One positioner will fully stroke one actuator with an input signal range from e 0 2to 0 6 bar 3 to 9 psig e 0 6 t
62. scale key 14 to the positioner cover Remove any other external indicator parts such as the pointer key 13 Note The standard low profile indicator uses a retaining ring e clip key 12 inside the positioner cover The retaining ring holds the indicator After removing the external scale remove the internal retaining ring to free the indicator 34 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 The optional beacon indicator uses a retaining ring e clip key 12 on the outside of the positioner cover The retaining ring holds the extension shaft After removing the beacon indicator remove the external retaining ring to free the extension shaft 3 Remove the internal or external retaining ring that holds the indicator extension shaft Remove the indicator extension shaft from the positioner cover 4 Install the new indicator extension shaft and secure it with the retaining ring Install other indicator parts and properly align the indicator using the procedure given in this instruction manual Removing the 3722 Converter See figure 24 Figure 24 Removing the Converter Mounting Screws ju m l n W6149 REMOVING ONE OF THE TWO MOUNTING SCREWS SEPARATING THE CONVERTER FROM THE POSITIONER BASE PLATE 1 Be sure all safety procedures have been followed Remove the input wiring and supply connection from the installed 3722 housing 2 Remove the two mounting screws key 84 and carefully
63. screw 2 Install the machine screw key 30E that connects the summing beam assembly to the diaphragm connector taking care not to twist the diaphragm connector and diaphragm key 30B Use a wrench or other tool to hold the diaphragm connector while installing the machine screw 3 Inspect the one O ring key 31 in the positioner base plate Replace it if necessary Properly lubricate key 63 the O ring Note See figure 30 Before securing the input module and summing beam assembly make sure the end of the summing beam does not come in contact with the spool shaft Instead the end of the summing beam should engage the spool head 40 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 4 See figure 30 Properly position the input module and summing beam assembly on the positioner base plate using the alignment pins on the input module If the spool valve key 1 has not been removed use care when positioning the input module and summing beam assembly Make sure the spool extending from the spool valve body properly engages the spool flexure Figure 30 Spool Valve and Summing Beam SPOOL VALVE ASSY 1ir7 SPOOL RELIEF SPOOL SPOOL HEAD HEAD SPOOL FLEXURE SPOOL FLEXURE LARGER VIEW OF SPOOL HEAD SUMMING BEAM ASSY CLEARANCE 0 381 0 762 mm A6044 1 0 015 0 030 INCHES 5 Secure the assembly with the four machine screws key 3 Assembling the Spool Valve Action Bl
64. separate the converter from the positioner base plate Locate the two O rings key 85 and inspect them Save or replace as necessary 3 Besure the input and supply ports in the positioner base plate are clean Apply sealant key 64 to the threads of any pipe nipples or other connectors to be installed in the ports in the positioner base plate Connect pneumatic input and supply pressure to the positioner if necessary Removing the Positioner 1 If you are planning to remove a 3720 positioner be sure to turn off electric power to the 3722 converter Disconnect field wiring Release all pressure to the positioner Disconnect the supply instrument and output tubing 2 Unscrew the four captive cover screws key 8 and remove the positioner cover assembly key 7 3 Unscrew the three socket head screws key 46 and remove the positioner 35 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 4 Inspect the feedback tie bar key 42 attached to the actuator hub If necessary unscrew the machine screws key 47 and remove the tie bar Removing the Feedback Arm Assembly 1 Unscrew the cam locknut key 37 and remove the cam key 36 Note The zero adjustment locknut and zero adjustment knob are identical parts key 35 2 Loosen the zero adjustment locknut and turn the zero adjustment knob key 35 until the range spring is free from the summing beam See figure 25 Move the feedback arm key 21 until the ra
65. sig or maximum pressure rating of the actuator whichever is lower Supply Medium 3710 air or natural gas 3720 air 3720 positioners are not approved for use with natural gas as the supply medium Steady State Air Consumption 4 3710 6 mm Standard Spool Valve 0 82 normal m3 hr 29 scfh at 4 1 bar 60 psig supply pressure 3720 6 mm Spool Valve 1 0 normal m3 hr 36 scfh at 4 1 bar 60 psig supply pressure Maximum Supply Air Demand 4 Double Acting Output 6 mm Spool Valve 20 normal m hr 700 scfh at 4 1 bar 60 psig supply pressure Typical Performance 5 3710 Independent Linearity 0 5 of output span Hysteresis 0 5 of output span Deadband 0 3 of input span 3720 Independent Linearity 1 0 of output span Hysteresis 0 6 of output span Deadband 0 35 of input span Electromagnetic Compatibility for 3722 electro pneumatic converter Meets EN 61326 1 First Edition Immunity Industrial locations per Table 2 of the EN 61326 1 standard Performance is shown in table 2 below Emissions Class A ISM equipment rating Group 1 Class A Note Electromagnetic Interference EMI specifications also apply to 3720 positioners Operating Influences Supply Pressure Sensitivity A 10 change in supply pressure changes the valve shaft position less than the following percentages of valve rotation 3710 1 0 at 4 1 bar 60 psig supply pressure 3720 1 5 at 4 1 bar 60 psig supply pressure
66. ss Management sales office for approval certification information not listed here WARNING Failure to follow these conditions of safe use could result in personal injury or property damage from fire or explosion and area re classification CSA Intrinsically Safe Explosion proof Type n Dust Ignition proof No special conditions for safe use Refer to table 5 for approval information 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Table 5 Hazardous Area Classifications for Fisher 3722 Converter 1 CSA Canada Certification Body Certification Obtained Entity Rating Temperature Code Intrinsically Safe Vmax 30 VDC Ex ia IIC T4 T5 T6 per drawing GE28591 figure 34 Imax 150 mA 4 Tamb lt 82 C Ex ia Intrinsically Safe Pi 1 25W T5 Tamb lt 62 C Class II Division 1 GP A B C D E F G T4 T5 T6 6 Tamb lt 47 C per drawing GE28591 figure 34 Li 0 mH Explosion proof A Ex d IIC T5 T5 Tamb lt 82 C Class I Division 1 GP A B C D T5 Typen hone T6 Tamb lt 82 C Class I Division 2 GP A B C D T6 T6 Tamb lt 82 C Class Il Division 1 GP E F G T5 T5 Tamb lt 82 C Class Il Division 2 GP F G T6 T6 Tamb lt 82 C 1 These hazardous area classification also apply to 3720 positioners FM Intrinsically Safe Explosion proof Type n Dust Ignition proof Non incendive No special conditions
67. sting actuator To field mount a positioner to an existing actuator an actuator cover plate with mounting holes and purge tube knockout may be required Check the existing actuator cover plate It must have three positioner mounting holes and for specific actuators a purge tube knockout See table 4 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 If the proper mounting holes are present perform the following mounting procedure and then follow the calibration procedures in this instruction manual Refer to the appropriate instruction manuals for actuator and valve mounting procedures A WARNING Avoid personal injury from sudden release of process pressure Before mounting the 3720 electro pneumatic positioner or 3722 electro pneumatic converter Wear protective eyewear gloves and clothing whenever possible Do not remove the actuator from the valve while the valve is still pressurized Disconnect any operating lines providing air pressure electric power or a control signal to the actuator Be sure the actuator cannot suddenly open or close the valve Use bypass valves or completely shut off the process to isolate the valve from process pressure Relieve process pressure on both sides of the valve Vent the power actuator loading pressure and relieve any actuator spring precompression Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment When installin
68. t Module Diaphragm 39 Assembling the Input Module and Summing Beam Assembly 40 Assembling the Spool Valve Action Block and Gasket i isu eiin nennir eee ee 41 Assembling the Feedback Shaft CamsShafty ir ees 42 Introduction Scope of Manual Replacing the Feedback Arm Assembly and Span Adjuster Assembly 42 3722 Converter Maintenance 42 Replacing the Converter Primary O Ring and Eltern descen q Saba 42 Disassembling the 3722 Converter 43 Assembling the 3722 Converter 43 Testing the 3722 Converter Module 44 Parts Ordering 44 Parts Kits a ua up os ko iy Gade oon unt fees 44 Parts List u ua sede a er ERI ERR 44 Positioner Common Parts 44 Diagnostic Connections 48 3722 Electro Pneumatic Converter 49 Positioner Mounting Parts 50 Mounting Parts for Mounting Positioner on 585 and 585R Actuators 54 Mounting Parts for the 67CFR on the 1032 54 PT 54 Loop Schematics 54 This instruction manual includes installation operation calibration maintenance and parts ordering information for the Fisher 3710 pneumatic positioner and 3720 electro pneumatic positioner This manual also provides field installation and maintenance information for th
69. the range spring is free from the summing beam Move the feedback arm key 21 until the range spring falls away from the summing beam Note The feedback pivot cannot be removed from the positioner base plate 3 Remove the retaining ring e clip key 27 which holds the feedback arm assembly key 21 onto the feedback pivot Remove the washer under the retaining ring and pull the feedback arm from the pivot 4 Remove the span adjuster assembly from the feedback arm by removing the zero adjuster locknut and sliding the span adjustment shaft threaded rod from the zero adjustment pivot on the feedback arm 5 Remove the zero adjustment knob from the span adjuster assembly Install the zero adjustment knob on the new span adjuster assembly 32 Instruction Manual 3710 and 3720 Positioners D101728X012 January 2015 6 Inspect the zero adjustment pivot key 32 Be sure it rotates freely If necessary replace the zero adjustment pivot Also if necessary replace the feedback arm assembly key 21 and cam roller key 23 following the instructions given in this manual 7 Install the new span adjuster assembly by sliding the span adjustment shaft threaded rod through the zero adjustment pivot Install the zero adjustment locknut on the span adjustment shaft 8 Install the feedback arm assembly with the new span adjuster assembly by returning the feedback arm assembly to the feedback pivot Turn the zero adjustment locknut and zero adj
70. tion Manual January 2015 D101728X012 Figure 26 Spool Valve Body and Spool SPOOL VALVE SPOOLHEAD W5917 1 Unscrew the two machine screws key 3 that hold the spool valve key 1 onto the action block key 28 Remove the spool valve taking care when separating the spool from the flexure on the summing beam 2 Inspect the three O rings key 2 found between the spool valve and the action block Remove and replace the O rings if necessary Lubricate key 63 O rings before installation 3 Unscrew the four machine screws key 3 that hold the action block onto the positioner base plate Lift off the action block and inspect the gasket key 29 underneath it Replace the gasket if necessary 4 Checkthe function of the spool valve The spool should slide freely in the valve body If it doesn t clean the spool valve or replace it Disassembling the Input Module and Summing Beam Assembly 1 Remove the four machine screws key 3 that hold the input module assembly key 30 to the positioner base plate If the spool valve has not been removed use care when lifting off the input module and summing beam assembly Be sure to properly separate the spool from the spool flexure 2 Inspect the one O ring key 31 in the positioner base plate Replace it if necessary CAUTION Avoid damage to the diaphragm key 30B when removing the machine screw key 30E that joins the diaphragm connector and the summing beam assembly Use a
71. tor housing e The exhaust pressure then purges the actuator housing and dissipates from the housing Most Fisher actuators do not have vent openings The exhaust pressure simply dissipates from within the actuator housing However the 1051 1052 and 1061 actuators feature an operational screened vent connection when a metal access plate is specified for the actuator housing When using the purge option remember The actuator and positioner assembly is not airtight However if you use the optional purge tube to connect the positioner to the actuator and the actuator has a vent opening leave open the 1 4 NPT vent connection in the actuator housing to prevent pressure buildup in the positioner case 21 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 If the 1 4 NPT vent connection is available a vent line can be installed from the actuator However the valve actuator positioner assembly is not airtight Maintain adequate ventilation and observe other safety measures For help in selecting the purge option for positioner actuator combinations contact your Emerson Process Management sales office Connecting the Purge Tube The positioner mounts directly to the actuator cover plate of 1051 1052 and 1061 actuators See table 4 for actuator sizes With an integral mounting a purge tube key 58 with two O rings key 59 can be used to relay actuator exhaust pressure from the positioner into the actuator ho
72. uator cylinder connection and OUTPUT B to the upper actuator cylinder connection To retract the actuator stem with increasing instrument input signal connect OUTPUT A to the upper actuator cylinder connection and OUTPUT B to the lower actuator cylinder connection Instrument Connection See figure 12 Use 3 8 inch tubing to connect the output from the control device to the INSTRUMENT connection on a pneumatic positioner For the electro pneumatic positioner refer to the Electrical Connection section Vent Opening Purge Option and Actuator Vent Connection Personal injury or property damage could result from fire or explosion of the accumulated gas if a flammable gas is used as the supply pressure medium Personal injury or property damage could also result from contact with the hazardous gas The 3710 positioner actuator assembly does not form a gas tight seal and flammable or hazardous gas could leak from the assembly Therefore if the assembly is enclosed install a remote vent line from the enclosure However a remote vent pipe from the enclosure alone cannot be relied upon to remove all hazardous gas Use adequate ventilation and other necessary safety measures Vent line piping should comply with local and regional codes and should be as short as possible with adequate inside diameter and few bends to reduce case pressure buildup WARNING 3720 and 3722 do not meet third party approvals for use with natural gas as the supply pressure
73. ure the end of the summing beam does not contact the spool Rather the summing beam should contact the spool head If necessary adjust the position of the spool valve on top of the action block making sure the summing beam does not bind on the spool throughout the full travel of the summing beam Tighten the two machine screws 7 Besure the spool head and summing beam remain engaged but do not bind up over the entire operating range of the input module 31 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Figure 22 Spool Valve and Summing Beam SPOOL VALVE ASSY lt SPOOL RELIEF SPOOL SPOOL HEAD HEAD SPOOL i FLEXURE E SPOOL lt LARGER VIEW OF SPOOL HEAD FLEXURE a SUMMING BEAM ASSY 6044 Changing the Span Adjuster Assembly Change Positioner Input Range The span adjuster assembly key 4 consists of the span adjustment knob span adjustment shaft threaded rod range spring and washer The range spring is welded to the washer and the washer is welded to the span adjustment shaft To identify the span adjuster assembly for 0 4 to 2 0 bar 6 to 30 psig input range red color coding appears on the range spring 1 Unscrew the cam locknut key 37 and remove the cam key 36 Note The zero adjustment locknut and zero adjustment knob are identical parts key 35 2 Loosen the zero adjustment locknut and turn the zero adjustment knob key 35 until
74. using If the current actuator cover plate does not have the positioner mounting holes and purge tube knockout order a new cover plate See the parts list for the specific actuator cover plate required for each actuator 1 The actuator cover plate features a purge tube knockout Locate the knockout and use appropriate tools to open this hole in the cover plate 2 Install the actuator cover plate and then insert the purge tube with O ring into the purge tube hole in the cover plate Note When mounting a positioner to an actuator with the purge tube installed guide the purge tube into the vent opening in the positioner base plate by removing the vent screen key 41 and then inserting an appropriate tool such as a screwdriver through the vent opening into the purge tube When the positioner is secured to the actuator install the vent screen 3 Before mounting the positioner be sure the second O ring is properly fitted to the end of the purge tube Use care when mounting the positioner Be sure the purge tube with O ring fits into the vent opening on the rear of the positioner base plate 4 Secure the positioner to the mounting plate using the hex socket head cap screws key 46 5 Install the vent screen in the positioner base plate Electrical Connection for the 3720 Positioner A WARNING In explosion proof applications disconnect power before removing the converter housing cap In Class I Division 1 explosion proof applic
75. ustment knob as needed to fit the range spring to the summing beam Install the washer and retaining ring that hold the feedback arm assembly in position 9 Install the cam and cam locknut Be sure the cam roller on the feedback arm assembly is properly positioned in contact with the cam 10 Perform the calibration procedures in this manual Principle of Operation See figure 23 Figure 23 Fisher 3710 Positioner Schematic INPUT SIGNAL PRESSURE n INPUT MODULE SUMMING BEAM KL PIVOT FEEDBACK LEVER A PISTON ACTUATOR bz aie OUTPUTA A5944 1 The 3710 pneumatic positioner accepts a pneumatic input signal and the 3720 electro pneumatic positioner accepts a milliampere mA direct current DC input signal from a control device The 3720 positioner uses a 3722 converter to provide a pneumatic input to the pneumatic portion 3710 of the electro pneumatic positioner The pneumatic portion of the positioner is a force balance instrument that provides a control valve position proportional to a pneumatic input signal The balance of opposing forces in the positioner occurs at the summing beam One force applied to the summing beam is developed from the input signal pressure on the diaphragm The other force is from the range spring and is proportional to the position of the feedback lever The feedback lever position is 33 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 determined by the l
76. verter module There are no converter module adjustments 43 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Testing the 3722 Converter Module Check the operation of the converter module by installing a pressure gauge in the instrument output port in the converter housing 1 Remove the pipe plug key 86 figure 32 in the instrument output port and connect a pressure gauge Provide supply pressure and a 4 to 20 mA DC input signal 2 Apply a 1 4 bar 20 psig supply pressure The instrument output pressure at a 4 mA DC input signal should be 0 16 to 0 24 bar 2 3 to 3 5 psig The pressure output at a 20 mA dc input signal should be 0 97 to 1 07 bar 14 0 to 15 5 psig 3 If necessary replace the converter module and test the new module Then calibrate the pneumatic portion of the positioner by performing the procedures in the Calibration section of this manual Do not attempt to calibrate the converter module There are no converter module adjustments Parts Ordering When corresponding with your Emerson Process Management sales office about this equipment be sure to mention the positioner serial number When ordering replacement parts refer to the part number of each required part as found in the following parts list A WARNING Use only genuine Fisher replacement parts Components that are not supplied by Emerson Process Management should not under any circumstances be used in any Fisher instrument
77. w key 30F on the opposite side of the diaphragm Remove the diaphragm plates and discard the diaphragm See figure 29 Position the new diaphragm key 30B between the diaphragm plates key 30C Be sure the diaphragm convolution is properly oriented between the diaphragm plates Attach the diaphragm connector key 30D with the machine screw key 30F Position the diaphragm assembly inside the input module housing using the alignment pins Replace the diaphragm cover and secure it to the input module housing with the four machine screws key 20 39 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 Figure 28 Input Module Diaphragm and Diaphragm Figure 29 Assembly of Input Module Housing O O O A6043 W5915 Assembling the Input Module and Summing Beam Assembly 1 Position the summing beam on the input module housing Place the flexure over the alignment pins extending from the summing beam and input module Secure the flexure by placing the two flexure retainers over the alignment pins extending through the flexure Install the two machine screws key 20 that hold the flexure retainers CAUTION Avoid damage to the diaphragm key 30B when installing the machine screw key 30E that holds the diaphragm connector to the summing beam assembly Use a wrench or other toolto hold the diaphragm connector while installing the machine
78. x socket cap screws key 93 10 11 12 Referto the actuator instruction manual Loosen the four screws and remove the actuator blanking plate Attach the positioner mounting plate to the actuator yoke as shown in figure 10 with four spacers keys 61 four cap screws key 45 and lock washers key 92 Loosen the four captive cover screws and remove the positioner cover Loosen the cam locknut key 37 figure 31 Attach the positioner to the mounting plate with three hex socket cap screws key 46 Make sure that the positioner feedback shaft key 38 figure 31 rotates freely and is not binding with the mounting bearing adjust if necessary Attach the feedback lever key 94 to the end of the feedback shaft with the two hex socket cap screws key 93 The markings on the feedback lever should be visible when looking toward the back of the positioner Make sure the roller bearing key 101 on the drive stud engages the slot in the feedback lever A WARNING An unexpected change in actuator supply pressure while performing the following steps could result in personal injury Use lockout procedures to ensure a stable air supply 14 Perform the Actuator Mounting procedure steps 2 through 8 in the actuator instruction manual to reconnect the actuator stem and valve stem 3710 and 3720 Positioners Instruction Manual January 2015 D101728X012 15 Make sure the cam locknut key 37 figure 31 is loose then stroke t
79. y 33 and zero adjustment pivot key 32 4 After removing the retaining ring washer and pivot inspect the needle bearing key 25 The needle bearing is pressed into the feedback arm If the needle bearing must be replaced replace the feedback arm assembly key 21 5 If necessary replace the retaining ring washer and zero adjustment pivot 6 Be sure the cam roller key 23 turns freely If necessary remove the shoulder screw key 24 and cam roller from the feedback arm and replace them Removing the Feedback Shaft Cam Shaft 1 Unscrew the cam locknut key 37 and remove the cam key 36 2 Remove the retaining ring e clip key 40 and washer key 39 that hold the feedback shaft key 38 in place 3 Grasp the feedback shaft where it extends from the back of the positioner base plate Pull the feedback shaft from the base plate being careful not to scratch the outside diameter of the shaft 4 Inspect the spacer key 69 on the shaft Inspect the flanged bearings key 17 in the positioner base plate If the spacer or bearings show signs of wear or damage replace them When re installing the feedback shaft spacer and bearings be sure the shaft rotates freely Disassembling the Spool Valve Action Block and Gasket Note See figure 26 Handle the spool valve body and spool with care The body and spool are manufactured to precise tolerances and are prepared as a matched set 37 3710 and 3720 Positioners Instruc

Emerson Fisher 3710 Instruction Manual

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