Emerson Fisher 646 Instruction Manual
Contents
1. TRANSDUCER TERMINAL BLOCK HOUSING 6 8V 6 8V N 60 Ohms CONTROL FIELD WIRING 60 Ohms EARTH GROUND NOTE T FOR TROUBLESHOOTING OR MONITORING OPERATION A6013 IL 23 Ohms AN INDICATING DEVICE CAN BE A VOLTMETER ACROSS A 250 OHM RESISTOR OR A CURRENT METER A3875 IL 646 Transducer Instruction Manual January 2015 D101351X012 Figure 7 Zero and Span Adjustments and Terminal Block Connections Cap Removed PRINTED WIRING ZERO ADJUSTMENT BOARDS A gt SPAN ADJUSTMENT FIELD WIRING ort CONNECTION TRANSDUCER 7 HOUSING A3876 2 IL Operating Information The normal mode of operation for the 646 transducer requires that the pneumatic output pressure be piped to the final control element If this is not done the resulting pneumatic output will vent to the atmosphere Calibration A WARNING On explosion proof instruments remove electrical power before removing the housing cap in a hazardous area Personal injury or property damage may result from fire or explosion if power is applied to the transducer with the cap removed in a hazardous area For intrinsically safe areas current monitoring during operation must be with a meter approved for use in hazardous areas Equipment Required Choose a current or voltage source that is capable without switching ranges of driving the transducer through its entire input range Switchin2. Li 0 mH Flameproof A WARNING Disconnect power before opening A0 C lt Ta lt 71 C T6 Tax 471 C 646 Transducer Instruction Manual January 2015 D101351X012 Typen A WARNING Disconnect power before opening A0 C x Tax 71 C T6 Ta lt 71 CG Refer to table 6 for additional information Table 6 Hazardous Area Classifications IECEx Certification Obtained Entity Rating Temperature Code Ui 30 VDC Intrinsically Safe li 150 mA T4 Tamb lt 71 Gas Pi 1 0 W Ex ia T4 T5 Ga Ci 0nF TU Li 0 mH Flameproof Gas T6 Tamb lt 71 C ExdlIC T6 Gb T6 Tamb lt 71 C Ex nA IIC T6 Gc Mounting When a transducer is ordered as part of a control valve assembly the factory mounts the transducer on the actuator and connects the necessary tubing then adjusts the transducer as specified on the order Transducers also can be ordered separately for mounting on a control valve assembly already in service or for mounting on a 2 inch diameter pipestand a flat surface or a bulkhead The transducer may be ordered either with or without mounting parts Mounting parts include a mounting plate and bolts and if ordered for pipestand mounting a pipe clamp Tubing is not included if the transducer is not factory mounted Use 10 mm 3 8 inch diameter tubing for all input and output connections The length of tubing between the transducer output and the final control element should be as
3. 24 25 For the following actuator types and sizes 657 amp 667 all sizes 1051 sizes 30 60 1052 sizes 20 70 Cap screw steel pl With 67CFR 4 req d Without 67CFR 2 req d Washer carbon steel pl With 67CFR 4 req d Without 67CFR 2 req d Hex nut steel pl With 67CFR 4 req d Without 67CFR 2 req d Instruction Manual D101351X012 Figure 11 Typical Fisher 646 Mounting With 67CFR Filter Regulator SUPPLY NOTES 1 gt 3 8 INCH TUBING SUPPLIED ONLY WHEN 646 IS FACTORY MOUNTED KEY NUMBERS 24 25 27 32 33 37 38 39 ARENOT SHOWN 38b3958 A B2381 2 IL Key Description 26 Mounting plate steel pl For 657 amp 667 sizes 80 amp 100 only With 67CFR 2 req d Without 67CFR 1 req d 26 Mounting plate steel pl For other actuators With 67CFR 2 req d Without 67CFR 1 req d 36 Elbow brass for 3 8 inch copper tubing With 67CFR 2 req d Without 67CFR 1 req d 37 Connector brass for 3 8 inch copper tubing With 67CFR 2 req d Without 67CFR 1 req d Pipestand and Panel Mounting 23 Cap screw steel pl Pipestand with 67CFR 4 req d Pipestand without 67CFR amp panel 2 req d 45 multiple panel 1 2 req d 1 For panel mounting at 45 to allow close mounting of multiple transducers Key 24 26 27 32 33 36 646 Transducer January 2015 UU 26 e3 OUTPUT Description Washer carbon steel pl Pipestand with 67CFR 4 req d without 67CFR 2 req d Panel 2 req
4. SST fittings Brass fittings Mounting Parts Yoke Mounting With 67CFR Filter Regulator Note Contact your Emerson Process Management sales office for 646 mounting FS Numbers 20 Key 23 24 25 26 27 28 36 37 Instruction Manual D101351X012 Description Forthe following actuator types and sizes 480 sizes 30 130 585C all sizes 656 sizes 40 amp 60 657 amp 667 sizes 30 100 1051 amp 1052 sizes 30 60 061 sizes 30 100 1066 all sizes Cap screw steel pl 4 req d Washer carbon steel pl 6 req d Hex nut steel pl 4 req d Mounting plate steel Cap screw steel pl 2 req d Not req d for 585C Washer carbon steel pl 6 req d 585C only Elbow brass for 3 8 inch copper tubing 4 req d 657 1051 1052 1061 1066 and 1066SR only Connector brass for 3 8 inch copper tubing 2 req d 480 585C and 667 only Spacer 2 req d For 667 size 30 Cap Screw 2 req d For 585C only For 667 size 30 Yoke Mounting w o 67CFR Filter Regulator 23 36 37 For the following actuator types and sizes 480 sizes 30 130 585C all sizes 657 sizes 30 100 667 sizes 40 100 1051 amp 1052 sizes 30 60 1061 sizes 30 100 1066 all sizes Cap screw steel pl 2 req d Elbow brass for 3 8 inch copper tubing For 657 1051 1052 1061 1066 and 1066SR only Connector brass for 3 8 inch copper tubing For 657 1051 1052 1061 1066 and 1066SR 1 req d For 480 585C and 667 2 req d Casing Mounting 23
5. and manufactured in accordance Approximate Weight Transducer Only with Sound Engineering Practice SEP and cannot 1 6 kg 3 5 pounds bear the CE marking related to PED compliance However the product may bear the CE marking to Actuator Stroking Time indicate compliance with other applicable European See figure 2 Community Directives NOTE Specialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminology 1 The pressure and temperature limits in this document and any applicable standard or code limitation should not be exceeded 2 Normal m3 hr Normal cubic meters per hour 0 C and 1 01325 bar absolute Scfh Standard cubic feet per hour 60 F and 14 7 psia 2 Average flow rate determined at 12 mA and 0 6 bar 9 psig output 4 Performance values are obtained using a transducer with a 4 to 20 mA DC input signal and a 0 2 to 1 0 ba r3 to 15 psig output signal at an ambient temperature of 24 C 75 F Table 2 EMC Summary Results Immunity Phenomenon Basic Standard Test Level Reiformance Criteria Electrostatic discharge ESD IEC 61000 4 2 8 kV air Enclosure 80 to 1000 MHz 10V m with 1 kHz AM at 80 Radiated EM field IEC61000 4 3 1400 to 2000 MHz 3V m with 1 kHz AM at 80 A 2000 to 2700 MHz 1V m with 1 kHz AM at 80 A 0 sgnallconto TV ine to ground only each 1 No degradation during testing B Temporary degradation during testing but is self
6. d 45 multiple panell 4 req d Mounting plate steel Pipestand with 67CFR Pipestand without 67CFR 45 multiple panell Cap screw steel pl 45 multiple panell 2 req d Hex nut steel pl Pipestand with 67CFR 4 req d Pipestand without 67CFR amp panel 2 req d 45 multiple panell 4 req d Pipe clamp carbon steel pl pipestand only Elbow brass for 3 8 inch copper tubing Pipestand amp Panel W 67CFR 2 req d 21 646 Transducer January 2015 Loop Schematics Figure 12 CSA Loop Schematic Installation Drawing GE28591 NOTES HAZARDOUS LOCATION INTRINSIC SAFETY CLASS I Il IIl DIV 1 GROUPS A B C D E F G NON INCENDIVE CLASS I DIV 2 GROUPS A B C D FISHER TYPE 646 Vmax 30 VDC Imax 150 mA nF Li 0 mH Pi 1 0W 1 BARRIERS MUST BE CSA CERTIFIED WITH ENTITY PARAMETERS AND ARE TO BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER S I S INSTALLATION INSTRUCTIONS 2 EQUIPMENT SHALL BE INSTALLED IN ACCORDANCE WITH THE CANADIAN ELECTRICAL CODE PART I 3 FOR ENTITY INSTALLATION 1 5 AND N I Vmax gt Voc Imax gt Isc Ci Ccable lt Ca Li Lcable lt La GE28591 E1088 22 Instruction Manual D101351X012 NON HAZARDOUS LOCATION CSA APPROVED BARRIER Instruction Manual D101351X012 Figure 13 FM Loop Schematic Installation Drawing GE28590 HAZARDOUS LOCATION INTRINSIC SAFETY CLASS I Il 1 DIV 1 GROUPS A B C D E F G CLASS ZONE 0 AEx ia I
7. recovering Specification Limit 1 of span Figure 2 Output Time Relationships for Fisher 646 Transducer 100 90 80 70 60 50 40 30 20 10 LOADING EXHAUSTING 0 10 20 30 40 50 60 70 380 90 100 6815 IL TIME 76 OUTPUT OF 646 OUTPUT SPAN Description The transducer shown in figure 1 receives a 4 20 milliampere DC input signal and transmits a proportional 0 2 to 1 0 bar 3 to 15 psig pneumatic output pressure to a final control element A typical application is in electronic control loops where the final control element is a control valve assembly that is pneumatically operated The input signal and output pressure range of the transducer is indicated on the nameplate attached to the housing 646 Transducer Instruction Manual January 2015 D101351X012 CAUTION Dropping or rough handling of the transducer can cause damage to the converter module resulting in a shifted output ora minimum output A WARNING This product does not meet third party approvals CSA FM ATEX or IECEx for use with natural gas as the supply medium Use of natural gas as the supply medium can damage the instrument and result in personal injury or property damage from fire or explosion Should you need an instrument for use with natural gas Fisher 846 and i2P 100 electro pneumatic transducers both meet third party approvals for use with natural gas as the supply medium Contact your Emerson Process Management s
8. short as possible Transducer overall dimensions are shown in figure 3 If weatherproofing is required mount the transducer so that the vent can drain Do not allow moisture or condensate to collect in the vent Instruction Manual 646 Transducer D101351X012 January 2015 Figure 3 Dimensions and Connections CAP REMOVAL CLEARANCE 6 00 a a 41 1 1 62 se 2 25 n 138 D 67CFR 1 4 18 NPT SUPPLY CONN 62 0 2 44 1 4 18 NPT 1 2 14 CONDUIT CONN OUTPUT CONN J laA8NPT 25 OPTIONAL oPrioNALOUTPUT 38 GAUGE OR GAUGE CONN EXHAUST mm rm INCH Pneumatic Connections As shown in figure 3 all pressure connections on the transducer are 1 4 NPT internal connections Use 10 mm 3 8 inch tubing for all pressure connections Refer to the vent subsection below for remote vent connections Supply Pressure Requirements A WARNING Severe personal injury or property damage may occur if the instrument air supply 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 air or if you are unsure about the proper amount or method of air filtration or filter maintenance Supply pressure must be clean dry air Use a Fi
9. 18 Converter Module Replacement 15 LUISE M UP e 18 Relay Maintenance 16 Loop Schematics 22 Introduction Scope of Manual This instruction manual provides installation operation maintenance and parts ordering information for the Fisher 646 transducer Refer to separate manuals for instructions covering equipment used with the transducer Do not install operate or maintain a 646 electro pneumatic transducer 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 ae EMERSON www Fisher com Process Management 646 Transducer January 2015 Table 1 Specifications Input Signal 4 20 mA DC constant current with 30 VDC maximum compliance voltage Equivalent Circuit The 646 equivalent circuit is a series circuit consisting of a constant voltage drop battery of approximately 2 1 VDC and a total resistance of 143 ohms Input is shunted by three 6 8 V zener diodes see figure 6 Output Signal 0 2 to 1 0 bar 3 to 15 psig direct acting only Supply Pressure Recommende
10. 8579X022 Anti seize sealant not furnished with transducer Vent plastic Wire guide SST Wire lug Set Screw LCIE Converter module Recommended spare parts Instruction Manual D101351X012 Figure 10 Fisher 646 Transducer Assembly CONVERTER MODULE ELL kh 0 m hdd SAN k 1 E Ere pe CA 1 2 gt WS 9 5 O 222722227 SISI an i KD THY kq em nc TL qn WA 9 NOTE KEY NUMBER 49 IS NOT SHOWN APPLY LUB SEALANT 41B2373 E DOC 9 000C 646 Transducer January 2015 646 Transducer January 2015 Diagnostic Connections Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Description FlowScanner diagnostic system hook up Includes pipe tee pipe nipple pipe bushings connector body and body protector See figure 4 for part identification Note If the 646 transducer is used in a valve assembly with a positioner no hook up for diagnostic testing is required for the 646 The hook up for diagnostic testing should be installed at the positioner Front Output For units with gauges SST fittings Brass fittings For units without gauges SST fittings Brass fittings Side Output For units with gauges SST fittings Brass fittings For units without gauges
11. IC NON INCENDIVE CLASS I DIV 2 GROUPS A B C D FISHER TYPE 646 Vmax 30 VDC Imax 150 mA Ci 0 nF Li 0 mH Pi 1 0W 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 THECLASS 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 3 LOOPS MUST BE CONNECTED ACCORDING TO THE BARRIER MANUFACTURER S INSTRUCTIONS 4 MAXIMUM SAFE AREA VOLTAGE SHOULD NOT EXCEED 250 Vrms 5 RESISTANCE BETWEEN BARRIER GROUND AND EARTH GROUND MUST BE LESS THAN ONE OHM 6 NORMAL OPERATING CONDITIONS 30 VDC 20 mADC 7 FOR ENTITY INSTALLATION 1 5 AND N I Vmax gt Voc or Vt Ci Ccable lt Ca Imax gt Isc or It Li Lcable lt La Pi gt Po or Pt GE28590 B 646 Transducer January 2015 NON HAZARDOUS LOCATION FM APPROVED BARRIER 23 646 Transducer Instruction Manual January 2015 D101351X012 Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any
12. Instruction Manual 646 Transducer D101351X012 January 2015 Fisher 646 Electro Pneumatic Transducer Contents Figure 1 Fisher 646 Electro Pneumatic Transducer INtPOCUCHON 2 044 240 tee wh Dae tate eerie tn 1 Mounted on a Sliding Stem Actuator Scope of DJeSCEIDEION dune Re Ut ESQ Ee du 3 Specifications 4 Educational Services 4 Mistalation unupa eorr Maeda esata 4 Hazardous Area Classifications and Special Instructions for Safe Use and Installation in Hazardous Locations 5 CSA 5 6 ATEX cb CPC mE ET 6 7 8 Pneumatic Connections 9 Supply Pressure Requirements 9 Diagnostic Connections 10 VONE 10 Electrical Connections 10 Operating Information 12 deg dssdo 12 Equipment 12 Calibration Procedure 12 Principle of Operation 13 Malhnte llallCe toas aqha 14 Parts OPderiuss 18 TLOUDIESNOOUNG iore go reete 14 E
13. afe Flameproof Type n IECEx Intrinsically Safe Flameproof Refer to Hazardous Area Classifications and Special Instructions for the Safe Use and Installation in Hazardous Locations starting on page 5 for additional information Housing CSA Type 3 Encl FM NEMA 3 IP54 ATEX IP64 IECEx IP54 Mount instrument with vent on side or bottom if weatherproofing is a concern Other Classifications Certifications 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 certification specific information Connections Supply and Output Pressure 1 4 NPT internal connection Vent 1 4 NPT internal Electrical 1 2 14 NPT conduit connection Wire Size 18 to 22 AWG Adjustments Zero and Span Trim potentiometers 20 turn for zero and span adjustments are located under the housing cap see figure 7 continued Instruction Manual 646 Transducer D101351X012 January 2015 Table 1 Specifications Continued Mounting Position Declaration of SEP Any position is acceptable for standard pipestand Fisher Controls International LLC declares this panel or actuator mounting For weatherproof product to be in compliance with Article 3 paragraph housing mount the transducer so the vent can drain 3 of the Pressure Equipment Directive PED 97 23 EC It was designed
14. ales office for information on these products Specifications Specifications for the 646 transducer are listed in table 1 Educational Services For information on available courses for the 646 electro pneumatic transducer 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 Installation A WARNING Always wear protective clothing gloves and eyewear when performing any installation operations to avoid personal injury Check with your process or safety engineer for any additional measures that must be taken to protect against process media If installing into an existing application also refer to the WARNING at the beginning of the Maintenance section in this instruction manual Instruction Manual 646 Transducer D101351X012 January 2015 Hazardous Area Classifications and Special Instructions for Safe Use and Installation in Hazardous Locations 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 ref
15. bly 1 Assemble the inner valve spring key 12 onto the body plug key 5 and fit the valve plug key 14 onto the inner valve spring as shown in figure 9 To assure best alignment between the valve plug inner valve spring and body plug fit the valve plug onto the inner valve spring so that one of the three tabs at the base of the valve plug sets at the end of the last coil of the inner valve spring Figure 9 Valve Plug Inner Valve Spring and Body Plug Assembly VALVE PLUG KEY 14 ONE OF THREE TABS ON VALVE PLUG END OF SPRING COIL INNER VALVE SPRING KEY 12 O RING KEY 8 BODY PLUG Py A6057 1 IL Instruction Manual 646 Transducer D101351X012 January 2015 2 Insert the assembled valve plug inner valve spring and body plug into the relay body key 1 Compress the spring and thread the body plug key 5 into place Then tighten the body plug 3 Insert two of the mounting screws key 7 into two opposite holes of the relay body key 1 Hold the screws in place while assembling the following parts on the relay body The screws serve as studs to align the parts as they are being assembled 4 When replacing the exhaust port assembly key 10 make sure all passages and screw holes are aligned and that the hole in the center of the exhaust port assembly fits over the valve plug key 14 Place the exhaust port assembly on the relay body key 1 Hold assembled parts in place 5 Make sure th
16. d 1 4 bar 20 psig Minimum 1 4 bar 20 psig Maximum 3 4 bar 50 psig Average Steady State Air Consumption 2 3 0 08 m3 hr 3 scfh at 1 4 bar 20 psi supply pressure Maximum Output Air Capacity 2 8 0 m3 hr 300 scfh at 1 4 bar 20 psig supply pressure 4 Reference Accuracy 0 5 of full scale output span includes combined effects of hysteresis linearity and deadband Independent Linearity 0 5 of full scale output span Hysteresis 0 4 of full scale output span Frequency Response Gain is attenuated 3 dB at 10 Hz with transducer output signal piped to a typical instrument input Temperature Effect 4 of full scale output span per 55 100 change Supply Pressure Effect 0 2 of full scale output span per psi supply pressure change Vibration Effect Less than 126 of full scale output span when tested to SAMA PMC 31 1 Condition 3 Electromagnetic Compatibility 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 Instruction Manual D101351X012 Emissions Class A ISM equipment rating Group 1 Class A Operating Ambient Temperature Limits 40 to 71 C 40 to 160 F Electrical Classification CSA Intrinsically Safe Explosion proof Type Dust Ignition proof DIV 2 FM Intrinsically Safe Explosion proof Type n Non incendive Dust Ignition proof ATEX Intrinsically S
17. de Intrinsically Safe Vmax 30 VDC Class 1 Zone 0 AEx ia IIC T4 T5 Imax 150 mA per drawing GE28590 see figure 13 1 0W 1 Class 1 Il III Division 1 GP A B C D E F G Ci OnF TA T5 per drawing GE28590 see figure 13 Li 0 mH Explosion proof Class 1 Zone 1 AEx d IIC T6 T6 Tamb lt 71 C Class Division GP A B C D T6 Typen e 719 CL 1 Zone 2 AEx nLIIC TG Toles iC Class Division 2 GP A B C D T6 Class Il Division 1 Groups E F G T6 T6 Tamb x 71 C Class Il Division 2 GP F G T6 ATEX Standards Used for Certification EN 60079 0 2012 EN 60079 31 2009 EN 60079 1 2007 EN 61241 0 2006 EN 60079 11 2012 EN 61241 1 2004 EN 60079 15 2010 EN 61241 11 2006 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 the following values Ug lt 30 VDC Ip lt 150 Po lt 1 W Ambient temperature T5 at Tamb 40 C T4 at Tamb 71 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 If using a cable connection the cable entry device shall be certified in type of explosion protection flameproof enclosure d suitable f
18. e tabs on the body block key 2 align with the tabs on the relay body key 1 and that the side with 5 holes faces the relay body Place the body block on the assembled parts Hold assembled parts in place 6 When replacing the input diaphragm key 9 make sure all passages and screw holes are aligned Place the input diaphragm on the body block key 2 Hold assembled parts in place 7 Install the bias spring key 13 into the transducer housing assembly key 3 Make sure the tabs on the body block and relay body align with the tab on the transducer housing assembly Place the assembled parts onto the transducer housing assembly Thread the two mounting screws key 7 into the transducer housing assembly Install the remaining two mounting screws Tighten all mounting screws to 2 Nem 20 Ibfein 8 Perform the procedures in the Calibration section 646 Transducer January 2015 Parts Ordering A serial number is assigned to each transducer and stamped on the nameplate Always refer to this serial number when corresponding with your Emerson Process Management sales office regarding spare parts or technical information When ordering replacement parts also specify the complete 11 character part number from the 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 Use of components not supplied by E
19. er to the nameplate itself to identify the appropriate certification Contact your Emerson Process Management sales office for approval certification information not listed here A 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 DIV 2 No special conditions for safe use Refer to table 3 for additional information Table 3 Hazardous Area Classifications CSA Canada Certification Body Certification Obtained Entity Rating Temperature Code Intrinsically Safe Vmax 30 VDC Ex ia IC T4 T5 per drawing GE28591 see figure 12 Imax 150 mA Ex ia Intrinsically Safe is 1 0W 1 _ AEG Class 1 Il Division 1 GP A B C D E F G T4 T5 OnF per drawing GE28591 see figure 12 0mH Explosion proof Ex dlIC T6 6 Tamb lt 71 C Class 1 Division GP A B C D T6 Typen o Class 1 Division 2 GP A B C D T6 Class Il Division 1 Groups E F G T6 T6 Tamb x 71 C Class Il Division 2 GP F G T6 646 Transducer Instruction Manual January 2015 D101351X012 FM Intrinsically Safe Explosion proof n Non incendive Dust Ignition proof No special conditions for safe use Refer to table 4 for additional information Table 4 Hazardous Area Classifications FM United States Certification Body Certification Obtained Entity Rating Temperature Co
20. g ranges on a current or voltage source will produce spikes or mid scale reverses in the input signal presented to the transducer causing errors The current source should be capable of delivering 30 mA with 30 VDC maximum compliance voltage Calibration Procedure A WARNING For critical processes this calibration procedure requires taking the final control element out of service To avoid personal injury or property damage due to an uncontrolled process provide some temporary means of process control before beginning the calibration procedure 12 Instruction Manual 646 Transducer D101351X012 January 2015 Refer to figure 7 for adjustment locations 1 If a current source other than the control device is used as the input source disconnect the control device and connect the current source positive terminal to the transducer terminal and the current source negative terminal to the transducer terminal If an external meter is used connect the current source positive terminal to the transducer terminal Connect the meter positive terminal to the transducer terminal and the meter negative terminal to the current source negative terminal as shown in figure 5 2 Check the supply pressure to ensure it is at the recommended pressure listed on the transducer nameplate 3 Adjustthe input current to 4 00 milliamperes DC 4 The output pressure should be 0 2 bar 3 psig If not adjust the ZERO potentiometer until the o
21. lliampere DC current source supply pressure and a gauge to monitor the output pressure when checking transducer operation Refer to figure 10 for key number locations 1 Ensure that supply pressure to the transducer is a consistent 1 4 bar 20 psig 2 If a filter requlator is used ensure that it is working correctly If not ensure the dripwell is not plugged because of excessive moisture accumulation If necessary drain off any moisture and clean or replace the filter element 3 Force the converter module to maximum output pressure with a 30 milliampere DC signal Output pressure should build up to the approximate value of the supply pressure 4 When the input current is removed the transducer output pressure should drop to less than 0 14 bar 2 psig If it does not check to ensure the vent and exhaust air passageway is free from foreign material 5 Toinspect the relay assembly refer to the relay maintenance procedures Converter Module Replacement Removal Refer to figure 10 for key number locations 1 Remove the housing cap key 4 2 Note the location of the wires then remove the electrical wiring from the terminal block mounted on the printed wiring board 3 Remove the two screws key 19 and remove the converter module and wire quide key 42 from the housing 4 Inspect the O ring key 18 and replace if necessary Replacement 1 Lubricate the O ring key 18 with a lubricating compound such as key 20 befo
22. matic output will vent to the atmosphere Due to normal wear or damage from external sources such as debris in the supply medium periodic maintenance or repair of the transducer may be necessary Maintenance of the transducer consists of troubleshooting removal for inspection and replacement of component parts A WARNING To avoid personal injury or property damage from the sudden release of pressure e Always wear protective clothing gloves and eyewear when performing any maintenance operations 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 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 Uselock out procedures to be sure that the above measures stay in effect while you work on the equipment e Do not open when 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 For explosion proof applications disconnect power before removing the housing cap Personal injury or property damage may result if power is not disconnected A WARNING The presence of Emerson Process Management personnel and approval age
23. merson Process Management may void your warranty might adversely affect the performance of the instrument and could result in personal injury or property damage Parts Kits Description Part Number 646 Transducer Repair Kit Includes keys 6 8 9 10 12 13 14 and 18 The O ring for the converter module is also included in the kit R646X000012 Parts List Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Key Description 1 Relay body assembly 2 Body block aluminum 3 Housing assembly 1 2 NPT conduit connection 4 Housing Cap aluminum 5 Body plug aluminum 18 Key 6 g 9 10 12 13 14 15 16 17 18 20 21 217 2 41 42 43 44 Instruction Manual D101351X012 Description Part Number O ring nitrile 1E5477X0062 Machine screw stainless steel 4 req d O ring nitrile 1H8762X0012 Input diaphragm nitrile 21B2362X012 Exhaust port assembly Inner valve spring stainless steel Bias spring steel pl Valve plug stainless steel 21B2370X012 Wire retainer steel pl 2 req d Nameplate w o approvals aluminum Screw stainless steel 2 req d O ring nitrile 1C8538X0132 Screw stainless steel 2 req d Anti seize lubricant not furnished with transducer Pipe plug use when gauge is not specified not shown Alloy steel pl Stainless steel Gauge 0 30 psig 0 0 2 MPa 0 2 bar not shown 11B
24. ncy personnel may be required if you service other than normal routine maintenance such as calibration or replace components on a 646 transducer that carries a third party approval When you replace components use only components specified by the factory Substitution with other components may void the third party approval and result in personal injury or property damage Also always use proper component replacement techniques as presented in this manual Improper techniques can cause poor quality repairs and impair the safety features of the device The converter module should never be disassembled because the magnetism in the coils will decrease permanently If troubleshooting or alignment attempts indicate a faulty converter module replace the module or return the transducer to your Emerson Process Management sales office for repair Troubleshooting The following procedures require taking the control valve actuator assembly out of service Provide some temporary means of process control before taking the control valve out of service Instruction Manual 646 Transducer D101351X012 January 2015 Electrical 1 Ensure terminal lug connections from the control device to the transducer are of the correct polarity refer to the electrical connection procedures in the Installation section 2 Atthe transducer ensure that the milliampere DC signal is applied and that it is within the 4 to 20 milliampere range Pneumatic Provide a 4 30 mi
25. or 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 Instruction Manual 646 Transducer D101351X012 January 2015 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 5 for additional information Table 5 Hazardous Area Classifications ATEX Certificate Certification Obtained Entity Rating Temperature Code 011080 m Intrinsically Safe Ui 30 VDC T4 Tamb lt 71 Gas 150 mA lt 40 Ex ia IIC T4 T5 Ga ey Dust Ci 0 nF Ex ia Da T155 C Tamb lt 71 T124 C Tamb lt 40 C Li 0 mH Flameproof Gas Tamb lt 71 DH ExdlIC T6 Gb Dust Ex tb T74 C Db Tamb lt 71 C IBGED ee T6 lt 71 C Typen Gas T6 Tamb lt 71 C Ex nA IIC T6 Gc Dust Ex tc T74 C Dc Tamb lt 71 IECEx Conditions of Certification Intrinsically Safe A WARNING Substitution of components may impair intrinsic safety 40 lt lt 71 5 lt 40 lt 712 Entity Parameters 30V 11 150 1 0W
26. p for diagnostic testing is required for the 646 The hook up for diagnostic testing should be installed at the positioner Install the connectors and hardware between the 646 transducer and the actuator 1 Before assembling the pipe nipple pipe tee pipe bushings actuator piping and connector body apply sealant to all threads 2 Turn the pipe tee to position the connector body and body protector for easy access when doing diagnostic testing Vent If a remote vent is required the vent line must be as short as possible with a minimum number of bends and elbows To connect a remote vent remove the plastic vent key 41 figure 10 The vent connection is 1 4 NPT internal Use 3 8 inch tubing to provide a remote vent Electrical Connections A WARNING For explosion proof applications disconnect power before removing the housing cap Instruction Manual 646 Transducer D101351X012 January 2015 For explosion proof Class 1 Division 1 applications using metal conduit install a conduit seal no more than 457 mm 18 inches from the transducer Personal injury or property damage may result from explosion if the seal is not installed For other explosion proof applications install the transducer in accordance with applicable codes A WARNING For proper wiring and installation for intrinsically safe installations refer to the nameplate affixed to the product and loop schematics for CSA and FM figure 12 and 13 or to instructions pro
27. 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 ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore www Fisher com E M ERSON 1987 2015 Fisher Controls International LLC All rights reserved A lt
28. re replacing the converter module in the housing 2 Insert the converter module and wire guide key 42 into position in the housing key 3 Replace the two screws key 19 and tighten them 3 Replace the electrical wiring removed in step 2 of the removal procedures Do not overtighten the terminal screws Maximum torque is 0 45 Nem 4 Ibfein 4 Electrically calibrate the module following the procedures in the Calibration section 5 Replace the housing cap key 4 646 Transducer Instruction Manual January 2015 D101351X012 Relay Maintenance Refer to figure 10 for key number locations Removal 1 Remove the four mounting screws key 7 and remove the relay from the transducer Be careful not to lose the bias spring key 13 and input diaphragm key 9 Remove the body block key 2 from the relay body assembly key 1 Remove the exhaust port assembly key 10 from the relay assembly Remove the body plug key 5 that holds the inner valve spring key 12 and valve plug key 14 in place Inspect the springs exhaust seat valve plug and other parts for wear or damage replace as necessary Note the valve plug supply seat is an insert in the relay body key 1 If this insert is bad replace the relay body Ensure that the fixed restriction in the transducer housing is clear of foreign matter 7 Make sure all parts of the relay are clean and that all passages are clear of foreign matter W N Assem
29. sher 67CFR filter regulator with standard 5 micrometer filter or equivalent to filter and regulate supply air The filter regulator can be mounted on a bracket with the transducer as shown in figure 11 or mounted on the actuator mounting boss An output pressure gauge may be installed on the regulator to indicate the supply pressure to the transducer Also as an aid for calibration a second gauge may be installed on the transducer to indicate transducer output pressure 646 Transducer Instruction Manual January 2015 D101351X012 Connect the nearest suitable supply source to the 1 4 NPT IN connection on the filter regulator if furnished or to the 1 4 NPT SUPPLY connection on the transducer case if the filter regulator is not attached Diagnostic Connections To support diagnostic testing of valve actuator positioner packages special connectors and hardware are available Typical connector installations are shown in figure 4 The hardware used includes a 1 4 NPT pipe nipple and pipe tee with a 1 8 NPT pipe bushing for the connector The connector consists of a 1 8 NPT body and body protector Figure 4 Diagnostics Hookup for the Fisher 646 Transducer STEM PROVIDED WHEN GAUGE IS SPECIFIED GAUGE BODY PROTECTOR BODY BODY BODY PROTECTOR PIPE BUSHING PIPE TEE PIPE NIPPLE PIPE BUSHING FRONT OUTPUT SIDE OUTPUT 12B8 B2395 1 IL Note If the 646 transducer is used in a valve assembly with a positioner no hook u
30. utput pressure is 0 2 bar 3 psig 5 Adjust the input current to 20 00 milliamperes DC 6 The output pressure should be 1 0 bar 15 psig If not adjust the SPAN potentiometer until the output pressure is 0 8 bar 15 psig 7 Repeat steps 2 through 6 until the output pressure is within the referenced accuracy requirements without further adjustment 8 If a current source other than the control device was used disconnect the current source and reconnect the control device Principle of Operation The converter module receives a standard DC current input signal from a control device to operate coils in a force balanced beam system which in turn controls bleed air through an integral nozzle flapper arrangement The nozzle pressure provides the input signal to operate the relay as shown in figure 8 Relay output pressure is applied through tubing directly to the final control element or valve actuator assembly Figure 8 Fisher 646 Transducer Schematic COIL u MAGNET ZERO AND SPAN CIRCUIT BEAM FLAPPER DCCURRENT INPUT SIGNAL CONVERTER MODULE id NOZZE RELAY DIAPHRAGM p RESTRICTION DIAPHRAGM VALVE PLUG OUTPUT PRESSURE SERRE DSESQUNE A3877 1 IL 646 Transducer Instruction Manual January 2015 D101351X012 Maintenance The normal mode of operation for the 646 transducer requires that the pneumatic output pressure be piped to the final control element If this is not done the resulting pneu
31. vided by the barrier manufacturer A WARNING 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 Use the 1 2 14 NPT conduit connection shown in figure 3 for installation of field wiring For Class 1 Division explosion proof applications install rigid metal conduit and a seal no more than 457 mm 18 inches from the transducer Also install conduit using local and national electrical codes which apply to the application Refer to figures 5 6 and 7 when connecting field wiring from the control device to the transducer Connect the positive wire from the control device to the transducer terminal and the negative wire from the control device to the transducer terminal Do not overtighten the terminal screws Maximum torque is 0 45 Nem 4 Ibfein Connect the transducer grounding terminal to earth ground Grounding terminals are provided both inside and outside the transducer housing Figure 5 Typical Field Wiring Diagram Figure 6 Equivalent Circuit 4 20 mA
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