IP - Dwyer Instruments, Inc.
Contents
1. Dwyer Instruments Inc Michigan City IND 46361 Phone 219 879 8868 Fax 219 872 9057 The Series IP I P Current to Pressure Transducer a RENN NN g Yi L I AG Installation Operation and Maintenance Instructions N RY ANSASSA UL N z Pilot Pressure pj Supply Pressure Atmospheric Pressure E Output Pressure Contents Section Description Page 1 0 Description amp Installation 2 2 0 Operation 3 3 0 Maintenance 5 4 0 Troubleshooting 5 546 622 053 Dwyer Instruments Series P Current to Pressure Transducer Page 1 DANGER WARNING CAUTION and NOTE statements DANGER Refers to conditions or hazards which could result in serious personal injury or death WARNING Refers to conditions or hazards which could result in personal injury Refers to conditions or hazards which could result in equipment or property damage Alerts you to facts or special instructions ALL DANGER WARNING AND CAUTION NOTICES MUST BE COMPLIED WITH IN FULL SPECIFICATIONS Min Max Supply Pressure Minimum 3 psig 21 kPa Above maximum output Maximum 100 psig 700 kPA Supply Pressure Sensitivity lt 0 1 of span per psig lt 0 15 of span per 10 kPa Linearity lt 0 75 of span Repeatability lt 0 5 of span Hysteresis lt 1 0 of span Flow Rate 4 5 scfm 7 6 m3 hr ANR at 25 psig 175 kPa supply 12 0 scfm 20 0 m3 hr AN2. Dwyer Instruments Series I P Current to Pressure Transducer Page 2 1 4 Pneumatic Connections 1 4 1 The 1 4 NPT supply and output ports are marked IN and OUT respectively on the base of the unit Clean all pipe lines to remove contamination before installation Apply pipe compound to male threads of the air line only Avoid getting compound in the air lines Clean dry instrument quality air must be used To insure optimum performance supply pressure should be regulated To provide stable inlet pressure and prevent contamination of the internal section of the transducer the use of an Instrument Air Filter Regulator is recommended The two unmarked ports on the base of the unit are gage ports but may be used as alternative output ports Any unused ports must be plugged 1 5 Electrical Connections 1 5 1 Electrical connections are made to the black and white leads extending out from the 1 2 NPT conduit fitting When the positive side of the input signal is connected to the black lead the output pressure will increase as the input signal increases For reverse acting mode increasing input signal decreases output pressure connect positive side of the input signal to the white lead Figure 1 DIN 43650 Connector TERMINAL CONNECTION POSITIVE NEGATIVE 2 OPERATION 2 1 Calibration 2 1 1 546 622 053 Zero and Span should always be checked after mounting If unit is calibrated in a vertical position an
3. f A A o A a 145 1 13 Diameter 390 987 MNTG 4 24 Diameter n Holes 107 7 i7 1 2 cal A F 1 12 NPT pS 1 250 28 4 a e 31 7 SIGNAL 9 i D SPAN _ 1 50 38 1 IN F3 OUT j Alternate 2 18 GA Wire Leads 1 4 55 Out Gauge 18 Long NPT gt Port Black Positive 1 Typ 14 An a TYP 180 A 7 180 Apart White Negative 36 6 a a 2 3 intrinsically Safe Operation 2 3 1 Dwyer Instruments Inc offers Factory Mutual Intrinsically Safe approval as a standard feature on all units with a 4 20 mA input signal APPROVED Dwyer Instruments Inc I P Models RL Model No Signal Output Nom Imped Lacio ims STAHL 9001 01 280 100 10 4 20 mA IP 40 4 20 mA 3 9 psig 90 Ohms RSNA i IP 42 4 20mA 3 15 psig 180 Ohms gao D3 STAHL SCRE oe POY Voltage sls 4 20mA __3 27 psig 220 Ohms ae oat 20 nA IP 44 4 20 mA 6 30 psig 220 Ohms me a ROBO IP 45 4 20mA 1 17 psig 250 Ohms MODELS 9001 01 280 100 10 AND 9002 13 280 110 00 24 TO 26 V DC IP 46 4 20 mA 2 60 psig 225 Ohms AVAILABLE FROM R STAHL INC 150 1 NEW BOSTON ST WOBURN MA 01801 IP 47 4 20 mA 3 4 20 psig 260 Ohms KX Notes 1 Installation to be in accordance with the national electric code NFPA 70 article 504 and ANSI ISA RP 12 6 Apparatus connected to the system shall not use or generate voltage greater than 250 VDC Install intrinsically safe barriers in accordance with barrier instructions Factory Mutual approved as intrinsically
4. white electrical signal leads and carry out the same procedure as described above Note that zero will now be set at maximum output pressure and the span will now be set at minimum output pressure Figure 2 Electrical Schematic R3 J2 J3 J1 Notes 1 For 4 20 mA and 10 mA use J1 as positive input 2 For 10 50 mA change R4 to 100 Ohms 3 For 1 9 VDC and 0 10 VDC remove R2 use J5 as positive input Dwyer Instruments Series P Current to Pressure Transducer Page 3 546 622 053 2 2 Dimensional Drawings Dimensions are 2 10 32 UNF 2A x 38 DP l Lack b3 MTL 728 10 4 20 mA e m A N o mmea RSG QLLPK S Baco a MTL 787S 10 a24 ko 26 VOC oe m SENZ TA T ee ex XKX RR Signal Common POO Lace nr MTL 4045 sT ta e0 na KEN HAZARDOUS LOCATION NONHAZARDOUS LOCATION d Drawing No 531 990 037 Models 728 787S and 4045 24 to 26 VDC Model 728 24 to 26 VDC available from MTL Inc 7541 Gary Road Manassas VA 221110 USA Dwyer Instruments Series P Current to Pressure Transducer 1 10 Mounting Holes Shown with eee 27 9 Bracket Screws Installed o 113 7 a f 2 18 28 7 Meaning 55 4 Bracket Max Square 2l
5. R at 100 psig 700 kPa supply Maximum Air Consumption 05 scfm 07 m3 hr midrange typical Port Sizes 1 4 NPT Pneumatic 1 2 NPT Electric 1 DESCRIPTION and INSTALLATION 1 1 Description 1 1 1 The Series I P Current to Pressure Transducer converts a current or voltage input signal to a linearly proportional pneumatic output pressure This versatile instrument is designed for control applications that require a high degree of reliability and repeatability at an economical cost 1 2 Principle of Operation 1 2 1 The Series I P Transducer is a force balance device in which a coil is suspended in the field of a magnet by a flex ure Current flowing through the coil generates axial movement of the coil and flexure The flexure moves towards the nozzle and creates back pressure which acts as a pilot pressure to an integral booster relay Input signal increases or decreases for reverse acting cause proportional output pressure increases Zero and Span are calibrated by turning adjust screws on the front face of the unit Adjustment of the zero screw repositions the nozzle relative to the flexure The span adjustment is a potentiometer that controls the amount of current through the coil 1 3 Mounting 1 3 1 Unit may be pipe panel or bracket mounted Mounting may be at any angle though may require field adjustment High external vibration may cause output fluctuations Mounting in a vibration free area is recommended 546 622 053
6. d then mounted at an angle readjustment of the zero is necessary To calibrate use the following procedure 1 Open protective covers to expose zero and span adjustment screws 2 Connect the recommended air supply to the inlet of the transducer and an accurate pressure gage to the outlet 3 Connect the electrical input and set the input signal to the minimum value of the range being used e g 4 mA for a 4 20 mA unit 4 Observe the output pressure If necessary adjust zero screw until reaching minimum output pressure setting Turn zero screw counter clockwise to increase pressure clockwise to decrease pressure NOTE If unable to achieve output during calibration process turn adjustment screw counter clockwise for up to 30 revolutions until output pressure rises 5 Increase electrical input signal to its maximum value e g 20 mA for a 4 20 mA unit 6 Observe the output pressure If necessary adjust the span screw until reaching maximum output pressure setting NOTE For I P current input models turn span screw counter clockwise to increase pressure clockwise to decrease pressure For E P voltage input models turn span screw clockwise to increase pressure counter clockwise to decrease pressure 7 The Zero and Span adjustments are interactive After adjusting the span it will be necessary to recheck the zero Repeat steps 3 6 until both end points are at the required values 8 For reverse acting performance interchange the black and
7. safe for class Il and Ill Division 1 Groups C D E F and G when installed with barriers shown Factory Mutual approved as nonincendive for Class Division 2 Groups A B C and D and suitable for Class Il Division 2 Groups F and G and Class Ill Divisions 1 and 2 Barriers are not required for nonincendive rating Max V 29 9 VDC CAUTION Substitution of components may void Factory Mutual approval Ambient temperature range 30 C to 60 C Factory Mutual approved as intrinsically safe for Class Il and Ill Division 1 Groups C D E F and G when used with an apparatus meeting the following entity requirements Vmax 29 9 VDC Cl 0 Cl is capacitance by the transducer Imax 65 mA Li 35 mH Li is inductance contributed by the transducer 9 For DIN connector option add D to the model number 10 For NEMA 4X option add W to the model number 11 Models with NEMA 4X are Factory Mutual approved for indoor out door use per the requirements of NEMA 4X as described in the National Electrical Manufacturers Association Standard No 250 Enclosures for Electrical Equipment 1000 Volts Max 2 3 N Page 4 Under normal circumstances no maintenance should be required If clean dry air is not used the orifice can become blocked To clean first turn off supply air unscrew and remove orifice assembly The unplug orifice by using a wire that has a smaller diameter than 0 015 in 0 38 mm Use compressed air to blow ou
8. t any loose particles inside the orifice assembly Replace orifice assembly back into unit 4 TROUBLESHOOTING PROBLEM CHECK No output or low output Zero adjustment Supply pressure too low Clogged orifice Leakage Connections lt Bonnet Circuit Low or improper span Zero and Span adjustments Lead Wire Supply pressure too low Output leakage Erratic operation Electrical input signal Loose wires or connections Liquid in air supply Pintle Spring Bottom Plug eae Body Subassembly 546 622 053 REV 6 19 02 Dwyer Instruments Series I P Current to Pressure Transducer Page 5
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