Fisher 3710 and 3720 Positioners and 3722 Electro ...

1 3710 and 3720 positioners and 3722 Electro -Pneumatic ConverterFisher 3710 pneumatic and 3720 Electro -pneumaticpositioners are part of the 3700 positioner series. Theyare designed for use with either diaphragm or pistonrotary actuators. These Positioners provide a valve ballor disk position for a specific input signal. The 3710provides a valve position in response to a pneumaticinput signal. The 3720 is created by the addition of aFisher 3722 Electro -pneumatic converter to the 3710positioner. The positioner provides a valve position inresponse to a DC current input signal.

2 Either type caneasily be configured as single- or double- acting forrotary POSITIONERMOUNTED ON A 1066 ACTUATORW6058-1 SUPPLYCONNECTION3720 POSITIONERMOUNTED ON A 1052 ACTUATORW6144W61451/2 NPT OR M20 CONDUIT CONNECTIONSUPPLYCONNECTIONEXTERNALGROUND INGSCREW3722 Electro -PNEUMATIC CONVERTER3710 and 3720 PositionersD200437X012 Product :3710 August 20183710 and 3720 PositionersD200437X012 Product :3710 August 2018 2 SpecificationsAvailable ConfigurationThe Fisher 3700 series of Positioners include thefollowing models:3710: JSingle- or Jdouble-acting pneumatic rotaryvalve positioner3720: JSingle- or Jdouble-actingelectro-pneumatic rotary valve positioner consistingof a 3710 with a 3722 attached3722: An Electro -pneumatic converter that convertsa 4-20 mA DC input signal to a to bar (3 to 15 psig) signal for the pneumatic positionerInput Signal3710.

3 Standard: to bar (3 to 15 psig) or J bar (6 to 30 psig)Split-Range: to bar (3 to 9 psig) and bar (9 to 15 psig) or to bar (6 to 18 psig)and to bar (18 to 30 psig)3720:.Standard: J4-20 mA DC constant current with 30 VDC maximum compliance voltageSplit-Range: J4-12 mA DC or 12-20 mA DCEquivalent Circuit3720: 120 ohms shunted by three V zener diodesOutput SignalPneumatic pressure as required by the actuator up tofull supply pressureAction(1): Field reversible between direct and reverseSupply Pressure(2)Minimum Recommended: bar (5 psig) aboveactuator requirementMaximum: bar (150 psig) or maximum pressurerating of the actuator, whichever is lowerSupply Medium3710: Air or Natural Gas3720.

4 AirThe 3720 positioner is not approved for use withNatural Gas as the supply mediumSteady-State Air Consumption(3)3710:6 mm Spool Valve: normal m3/hr (29 scfh) at bar (60 psig) supply pressure3720:.6mm Spool Valve: normal m3/hr (36 scfh) at bar (60 psig) supply pressureMaximum Supply Air Demand(3) (Double-Acting)6 mm Spool Valve: 20 normal m3/hr (700 scfh) bar (60 psig) supply pressureTypical Performance(4)3710 Pneumatic PositionerIndependent Linearity: of output spanHysteresis: of output spanDeadband: of input span3720 Electro -Pneumatic PositionerIndependent Linearity: of output spanHysteresis: of output spanDeadband: of input spanElectromagnetic Compatibility for 3722electro-pneumatic converter: Meets EN 61326-1.

5 2013 Immunity Industrial locations per Table 2 of the EN 61326-1 standard. Performance is shown in table 1 below. Emissions Class A ISM equipment rating: Group 1, Class ANote: Electromagnetic Compatibility specificationsalso apply to the 3720 positionerOperating InfluencesSupply Pressure Sensitivity: A 10% change in supplypressure changes the valve shaft position less thanthe following percentages of valve rotation:3710: at bar (60 psig) supply pressure3720: at bar (60 psig) supply pressureOperative Temperature Limits(2)J-40 to 80_C (-40 to 180_F),J-50 to 107_C (-58 to 225_F)Construction MaterialsPositioner Base: Low copper aluminum alloyCover.

6 Polyester plasticFeedback Shaft: Stainless steelRange Spring: Stainless steelInput Module Diaphragm, O-rings: JNitrile orJEthylene-propylene (EPDM)Spool Valve: SST/C72900 Tubing: Copper (standard)-continued-3710 and 3720 PositionersD200437X012 Product :3710 August 2018 3 Specifications (Continued)Construction Materials (continued)Fittings: Brass (standard)Gauges: Chrome-plated brass connection with plasticcase Connectors for diagnostic testing: JStainless steel orJBrassElectrical Classifications for 3722 ConverterCSA Intrinsically Safe, Explosion-proof, Type n,Dust-Ignition ProofFM Intrinsically Safe, Explosion-proof, Type n,Non-incendive, Dust-Ignition ProofATEX Intrinsically Safe, Flameproof, Type nIECEx Intrinsically Safe, Flameproof, Type nNote: These classifications also apply to the 3720positionerHousing Classification for 3722 ConverterCSA Type 3 IP64FM NEMA 3, IP54 IECEx IP54 Mount instrument with vent on side or bottom ifweatherproofing is a concernNote.

7 These classifications also apply to the 3720positionerOther Classifications/Certifications for 3722 ConverterCUTR Customs Union Technical Regulations (Russia,Kazakhstan, Belarus, and Armenia)INMETRO National Institute of Metrology, Qualityand Technology (Brazil)KGS Korea Gas Safety Corporation (South Korea)Contact your Emerson sales office or Local BusinessPartner for classification/certification specificinformationNote: This classification also applies to the 3720positionerHazardous Area Classification for 3710 PositionerComplies with the requirements of ATEX Group IICategory 2 Gas and DustMeets Customs Union technical regulation TP TC012/2011 for Groups II/III Category 2 equipmentII Gb c T*XIII Db c T*XNote: These ratings do not apply to the 3720positionerPressure Connections1/4 NPT internalElectrical Connection for 3720 Positioner1/2-14 NPT conduit connectionRotary Valve RotationJ90 degrees (standard) J60 degrees (optional)OptionsSpan Adjuster Assembly.

8 To bar (3 to 15psig) input range or, to bar (6 to 30 psig)input rangeElastomers (O-rings, diaphragm): Jstandardtemperature range, -40 to 80_C (-40 to 180_F),Jextended temperature range -50 to 107_C (-58 to225_F)JSpecial applications, JBeacon indicator,JGauges(5), tire valves, or connectors for diagnostictestingApproximate Weight3710: kg ( pounds)3720: kg ( pounds)NOTE: Specialized instrument terms are defined in ANSI/ISA Standard - Process Instrument Direct-acting, an increasing input signal extends actuator rod. Reverse-acting, an increasing input signal retracts actuator The pressure and temperature limits in this document and any applicable standard or code limitation should not be Normal m3/hr--Normal cubic meters per hour (0_C and bar, absolute); Scfh--Standard cubic feet per hour (60_F and psia).

9 4. Typical values determined by tests with a 1061 size 30 actuator at bar (60 psig) supply pressure. Performance may vary with other actuator types and supply Gauges not available for high temperature and 3720 PositionersD200437X012 Product :3710 August 2018 4 Table 1. Fisher 3722 Electro -Pneumatic Converter(1) EMC Summary Results ImmunityPortPhenomenonBasic StandardTest LevelPerformanceCriteria(2)EnclosureElec trostatic Discharge (ESD)IEC 61000-4-24 kV contact;8 kV airARadiated EM fieldIEC 61000-4-380 to 1000 MHz @ 10V/m with 1 kHz AM at 80%1400 to 2000 MHz @ 3V/m with 1 kHz AM at 80%2000 to 2700 MHz @ 1V/m with 1 kHz AM at 80%ARated power frequency magneticfieldIEC 61000-4-860 A/m at 50 HzAI/O signal/controlBurst (fast transients)IEC 61000-4-41 kVASurgeIEC 61000-4-51 kV (line to ground only)BConducted RFIEC 61000-4-6150 kHz to 80 MHz at 3 voltsASpecification limit = 1% of span1.

10 The information contained in the table also applies to the 3720 A = No degradation during testing. B = Temporary degradation during testing, but is and 3720 PositionersD200437X012 Product :3710 August 2018 5 Featuresn Accurate, Fast Response 3710 and 3720positioners use field-proven spool valve technologyfor a simple design that gives accurate,fast-responding operation with high cycle Positioners are able to withstand the severevibrations of most plant Modular Construction The 3710 positionerconverts easily to a 3720 positioner by adding the3722 Electro -pneumatic converter.