Model Series 771 I/P Valve Service Transducers
Contents
1. 20 JA PRO TIE 21 SOCOILZASSEMBEY RBPLACENMBNIL 2 TRIER ERE I 22 SOOO REPLACBNIEN penc ET et UO cR Ma E 23 22525 c 24 TU PARTS LIST ethos ue 25 8 0 HAZARDOUS LOCATION INSTALLATION DRA WINGS ccccccccccccccccccccccccccccccccccccccccccccccccccccees 28 50771 LIST OF ILLUSTRATIONS FIGURE AND TITLE PAGE 2 1 Installation Standard Models ie ere one ene 12 2 2 Installation Boosted Models oec tote _ _ ______ 13 2 3 Optional Mounting Adapter Plate 5 1 1 2 2 1 0000000000000000000000000000000000000002 00000 13 2 4 Restriction Screw and Exhaust Port Locations and Electrical Connections 15 Transducer sche mal CS Se 17 Housing E T ISTE 18 SU BEGUN 23 8 1 Intrinsically Safe Installation with Safety Barriers Model 77 or 7712. 16 SAV OPERATION ete ELE 16 SiS LANDARD YY ____6 _6__ 16 O18 hod Beh OB SS TOI Oe TRIN nT Oe Eee OPS dM LR RARUS 17 eine eH na te LC LIE CIE 17 A TESTEOUPMEN P 18 tee Se 18 SOMAINTENANC E RR Rex ines 19 19 5 2 CLEANING STANDARD CAPACITY eese vex ed eux 19 19 3 2 2 Restriction Screw and eth hit 19 SOCLEANING BOOSTED MODELS teo Qa lean rod ave butt 20 SS dS 20 Ex Danse RIO o tele 20 THOUS MNS
3. 22 0000000000000000000000000000000882000 00091 28 8 2 Intrinsically Safe Installation Model 77 771 amp Foxboro Spec 200 or Interspec 20 8 3 Intrinsically Safe Installation Approved Barriers essere mene eene 1 30 8 4 Intrinsically Safe Connection Diagram Model 77 and 771 Entity 3l Changes for Revision 7 February 2006 Significant changes for this revision are indicated by change bars in the outside page margins Some of these changes are listed below SECTION CHANGE Changed publication revision number and date 2 Specifications Added supply pressure specifications for 3 27 psig output models 1 3 Product Support Updated All product designations may be trademarks or product names of Siemens Energy amp Automation Inc or other supplier companies whose use by third parties for their own purposes could violate the rights of the owners Siemens Energy amp Automation Inc assumes no liability for errors or omissions in this document or for the application and use of information included in this document The information herein is subject to change without notice Procedures in this document have been reviewed for compliance with applicable approval agency requirements and are considered sound practice Neither Siemens Energy amp Automation Inc nor these agencies are responsib
4. Part numbers for items ordered from the Process Industries Division of Siemens Energy amp Automation except as noted Qualified Persons The described equipment should be installed configured operated and serviced only by qualified persons thoroughly familiar with this publication copy of this publication 15 shipped with the equipment The current version in Portable Document Format PDF is available at http www w sea siemens com ai 50771 For purpose of this publication and product labels a qualified person is one who is familiar with the installation construction and operation of the equipment and the involved hazardous In addition he or she has the following qualifications e Is trained and authorized to energize de energize clear ground and tag circuits and equipment in accordance with established safety practices e Is trained in the proper and use of protective equipment such as rubber gloves hard hat safety glasses or face shields flash clothing etc in accordance with established safety practices e Is trained in rendering first aid Scope This publication does not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation operation or maintenance Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purposes the matt
5. 3 Install the required wiring between the F1 suffix model transducer and the barriers Use shielded or unshielded multi pair or single pair cables Ground the transducer body as required 4 Ina similar manner install the required wiring between the barriers and the output terminals of the device driving the transducer Install the redundant ground system for the barrier installation as specified by the barrier manufacturer 5 6 Check all signal and ground connections 7 Check all pneumatic connections and transducer adjustments 8 Check the calibration of transducer as outlined the Section 4 Calibration 3 0 OPERATION As shown in Figure 3 1 there are two models standard capacity output and boosted output In both models the input coil and float are attached to common center shaft to form the moving coil assembly This assembly 15 free to move vertically The float is submerged in Silicone fluid and 15 sized so that the resultant buoyant force equals the weight of the moving coil assembly This puts the moving coil assembly into a state of neutral buoyancy which together with the viscous damping of the Silicone fluid makes the transducer insensitive to shock and vibration The permanent magnet provides a magnetic field that passes through the input coil Current flowing through the coil reacts with the magnetic field to force the moving coil assembly closer to the nozzle The top end of the common center shaft
6. 5 ADJUSTMENT FLOAT FLOAT SILICONE FLUID SILICONE PA 0694 1 FLUID Standard Capacity Output Model Boosted Output Model FIGURE 3 1 Transducer Schematics 3 2 BOOSTED MODEL Supply air is applied directly to the supply port of the pilot valve Transducer output is biased and then fed through the restriction to the nozzle The nozzle backpressure varies according to the restrictive effect of the nozzle seat The nozzle forms a column of air that has a diameter equal to the nozzle diameter This column of air acts on the nozzle seat to oppose and equal the force produced by the coil current The nozzle backpressure is the input to the boosted diaphragm assembly lower side and it 1s directly proportional to the coil current An increase in nozzle backpressure operates the diaphragm assembly that moves the pilot valve to open the supply port and increase the booster transducer output A decrease in nozzle backpressure due to a decrease in coil current operates the diaphragm assembly to open the exhaust port and decrease the output The output is directly proportional to the nozzle backpressure and it acts on the upper side of the diaphragm assembly to balance the nozzle backpressure acting on the lower side Note that the restriction tube serves as a circuit stabilizer The Zero adjustment is provided by a screw that varies a spring force on the moving coil assembly 4 0 CALIBRATION This section describes
7. Some parts in this Parts List may not be available for separate purchase 25 50771 26 Symbol Part No Description Boosted Unboosted Req d Req d uwis Gwe 3 0 __ meos we 2 2 meon 1 78 coi Assembly Sene 1 Terminal Washer 31 s ms 1 9 5406 o 5 pes omm 2 mui 1 1 5 2 2 _ 16 usn sr 1 1 ume Rm msn 1 3 19 12392 53 Gasket 3w Boom Cov 5 6750 138 RetainingNot 01 m 1608049 Spring OOOO 5 26 12334410 Nozzle Housing 08 2 E ww 3 5 me N me N me NIe N Exhaust Ring 12334355 Shipping Serew 338 1233443 Dow Corning 200 Fluid not shown 20a Ob 21 22 23 26 27 28 29 30 31 32 34 35 37 38 39 40 41 42 50771 Symbol Part No Description Boosted Unboosted Req d Req d ISULIZ HReSewsWa ew 2 _ i255 1032x381 Ra Ha sow 4 4 _ D iue 4 _ rago 1420x 1 Lg Loc Hd Screw 4 _ Recommended On Hand Spare Parts Always specify range serial number or other nameplate information when ordering spare parts TABL
8. 1068 08 591 082 04 1058 02 020 08c 02 1068 97 05 1 661 05 8 07 051 380 0 lt 1058 8 581 082 1 1058 0 070 082 1 lt 1068 04 081 661 1 amp 1058 07 851 988 16 1068 0 0S50 002 0S 9 068 04 050 022 15 058 08 050 525 0 lt 058 827 7850 51 0 75068 02 050 7 82 0 lt 068 0 050 632 0 068 0 0850 002 0 4 068 02 050 161 05 7 058 0 050 881 0 lt 0868 0 050 921 0 4 0468 0 0802 980 0 lt 068 08 050 525 1 lt lt 068 0 050 514 1 lt lt 058 0 040 82 1 lt 058 0 050 lt 92 1 lt lt 58 0 050 002 1 lt 068 0 050 6 1 lt lt 58 07 050 891 1 lt lt 068 0 050 921 1 lt lt 068 9 080 980 12 9068 1 918 74915 6359186 34 933 0386 53A 233 0389 50331 93811 5053 11 0110 0000 5 484 5053 211 0118 0028 5758 5053 111 01128 0088 57 582 00118131585 34 081 18 1430885 SJA 18 151585 5 08218 148985 534 000223545511 34 0081233S 11 000 5305 11 000123302 11 1 H3Hf 112O0 INNON Z81 1H 534 Z8l LW 53 6Z4T1 114 34 4 SAA SAA ecl 53 STT UW 534 BITILW 53 820 11H 53A ecl 34 53 III 55873 55813 1550912 83801 SH3IHHUH W4 FIGURE 8 3 Intrinsically Safe Installation Approved Barriers 30 50771 Hazardous Classified Location Non
9. Hazardous Location Class I Division 1 Groups A B C D Class II Division 1 Groups E F G Class Division 1 Model 77 or 771 Associated Apparatus Vmax 45 V lt 45 V Imax 180 mA Isc lt 180 mA La mH Leable Li other approved IS equipment Ca gt Ccable 1 other approved IS equipment Other Approved Intrinsically Safe Equipment Umax 2 Voc Associated Apparatus Imax 2 Isc of Associated Apparatus Control Room Equipment Must not use or generate in excess of 250 V rms or DC Um 250 V Notes l Allequipment in the loop must be Approved by Factory Mutual Research Corporation and Certified by Canadian Standards Association Associated Apparatus and Control Room Equipment may be located in division 2 if so approved The installation must be in accordance with the National Electrical Code or Canadian Electrical Code and ANSUI ISA RP12 6 The Other Approved Intrinsically Safe Equipment located in the Hazardous Location must receive power only from the loop and may not contribute energy to the loop Wiring must be twisted shielded pairs 20 Awg or larger solid or stranded If the inductance and capacitance of the wiring are not known then the following parameters may be used Capacitance 60 pF per foot Inductance 0 20 uH per foot Do not remove exhaust sealing screw or condensation drain sealing screwin any Class II hazardous location or condition requiring an Enclosure Type 4 r
10. Inspect the O ring on the restriction screw Replace the O ring if it is damaged 20 50771 Remove pilot base and exhaust ring six screws lockwashers Remove the nozzle housing four socket head screws and lockwashers Clean the nozzle housing in solvent Blow compressed air through the nozzle and restriction tube Clean the nozzle seat end of center shaft with solvent Install the nozzle housing BE ee Ae idm Install the exhaust ring and pilot base 5 4 TROUBLSHOOTING Refer to Table 5 1 when troubleshooting the Transducer It is assumed that a calibrated input signal source is connected to the Transducer TABLE 5 1 Trouble Analysis Symptom Possible Cause Set supply air to 20 psig Make proper connection See Section 2 6 Wiring Loss of silicon fluid Replace fluid See Section 5 6 Float No output Will not occur unless bottom cover has Replacement section been loosened or removed Clogged filter screen Clean screen s See Section 5 2 Cleaning Standard Capacity Models or 5 3 Cleaning Boosted Models Output oscillates standard Insufficient volume in output tubing Add volume to output equaling 2 3 capacity models feet of standard 1 4 OD tubing Misaligned coil Align the coil See Section 5 5 Coil Assembly Replacement Erratic output during an Foreign object interfering with coil Clean out coil chamber See Section input change movement 5 2 Cleaning Standard Capacity Models or 5 3 Cleaning B
11. air only Optional features and modifications such as tapped exhaust do not imply suitability for use with hazardous gases except as listed on the approval certificate The requirements for a quality air supply are stated in the Instrument Society of America s Quality Standard for Instrument Air ISA S7 3 or BS5967 Part 2 Basically this standard calls for the following Particle Size The maximum particle size in the air stream at the instrument should be no larger than 3 microns e Dew Point The dew point at line pressure should be at least 10 C 18 F below the minimum temperature to which any part of the instrument air system is exposed at any season of the year Under no circumstances should the dew point at line pressure exceed 2 C 35 5 F Content The maximum total oil or hydrocarbon content exclusive of noncondensibles should not exceed 1 ppm under normal operating conditions Recommended supply pressure is listed in Section 1 2 Specifications CAUTION Supply pressure in excess of the specified maximum may cause damage 2 3 PIPING The supply IN and output OUT connections on the transducer are shown in Figures 2 1 and 2 2 Quarter inch O D tubing is recommended for piping to the transducer Before making connections blow out all piping Use pipe sealant sparingly and then only on the male threads of the tube fittings A non hardening sealant is strongly recommended There must be no leaks
12. be exceeded can adversely affect performance and may cause damage A flat adapter plate 15 available for mounting the transducer to a blind wall The adapter plate comes in a kit PN 12330 100 with two 1 4 20 flat head screws for mounting the plate to the transducer Either pair of transducer to adapter plate mounting holes can be used See Figure 2 3 for adapter plate dimensions A 2 pipe mounting kit PN 12334 130 1s also available This kit allows the transducer to be mounted on a 2 O D pipe It consists of a mounting bracket to mount the transducer and a U bolt assembly for pipe mounting 347 O SHIPPING SCREW Anm 88 14 C 1121 41 i SHIPPING SCREW germ CONNECTION 84 84 BEFORE OPERATING 1 4 NPT SEALING EXTERNAL EXHAUST PORT 1 4 NPT ON 2 78 70 61 55 FOR GROUND SCREW 0 ADJUSTMENT 100 SEALING SCREW CONDENSATION DRAIN HOLE EP BLIND TAPPED HOLES FOR MOUNTING V 2 CONDUIT NM CONNECTION Dimensions are in inches REAR VIEW e sIDE VIEW WIL 37 34 6715 15 m YELLOW WIRE FIGURE 2 1 Installation Standard Capacity Models 12 50771 4 78 121 41 CONNECTIO OUT OUTPUT ONNECI CON NECTION 1 8 NPT RESTRICTION SCREW ACCESS COVER FOR GROUND SCREW BOOSTER EXHAUST 4 SEALING SCREW 1 EXTERNAL XHAUS
13. the bottom surface of the housing Otherwise the fluid will seep past the gasket regardless of how much the screws are tightened 6 0 WARRANTY a Seller warrants that on the date of shipment the goods are of the kind and quality described herein and are free of non conformities in workmanship and material This warranty does not apply to goods delivered by Seller but manufactured by others b Buyer s exclusive remedy for a nonconformity in any item of the goods shall be the repair or the replacement at Seller s option of the item and any affected part of the goods Seller s obligation to repair or replace shall be in effect for a period of one 1 year from initial operation of the goods but not more than eighteen 18 months from Seller s shipment of the goods provided Buyer has sent written notice within that period of time to Seller that the goods do not conform to the above warranty Repaired and replacement parts shall be warranted for the remainder of the original period of notification set forth above but in no event less than 12 months from repair or replacement At its expense Buyer shall remove and ship to Seller any such nonconforming items and shall reinstall the repaired or replaced parts Buyer shall grant Seller access to the goods at all reasonable times in order for Seller to determine any nonconformity in the goods Seller shall have the right of disposal of items replaced by it If Seller is unable or unwilling to repair or re
14. 335 S5H3l14HH8B 5831848 01283 MIMUSZ INO 2 HMBS 531435 915 5174 593 Q3 41183 720550 SOMHB NHIS NUIQUNGO SH3L3HUHBd 8318898 SALON 1309098 122 1300 36822 72008 1 01 iN3HHD rn 14038 1727 7300 38677 7300 02 1 5 OL IN3HHXJ 1 40 N 101140 lt 0 8 S 14 1129992 Hisg3 HO 91 8 95 71028 HO 1N3A SHIU 03414 89 13028 4 73008 48577 02 512100 4 3HO0H 01 ANUOHQO3H V LINGYII O30NN0 SNN LINIYID oes JAIIUS3N JENSIS 1172612 Hi eee 50015 SNIIN ON 80 SNIONQDHO 2 111504 Sna 5597 J 3 3 557099 NOISIAIO II 55872 J 8 H 2 NOISIAID I 55813 J 8 H 5 1 NOISIAIO I 55872 1320171 34 NOT 18907 FIGURE 8 1 Intrinsically Safe Installation with Safety Barriers Model 77 771 2
15. 8 50771 35 elas 0 2 041 INIA 55970 Ep 11112 3 1 ZZ 22 3008 13285 8 ISNI 3395 ATIBOISNIHINI MST 2761 Wd ISRO INIS 03 519500099 AYOOW 5 NOISIA3U ANY 340118 A2N39VY SMC 1081N02 VS2 5118130 1220S 4405 335 5 0110211449 55812 389 61836 1 150079 1188 WIN SNIHInO3H 01110 02 HO 0119201 5 2 55912 83825 9NI 03S NIUHQ NOIIUSN3OUNO2 HO 3 25 9 1836 10N 00 SUA S2 0330 3 01 LON 398110 U3HU 3485 H2U3 H04 SNOIIOnHISNI 318921714649 ANY 88 51 SNOILOnHISNI 33S 153 23dSH31NI 9 19 3 2 09 5 SNOIL20HISNI 335 2345 OHOSXO4 03801104 38 15 5310008 iNdiNO 30 SNOISH3 3395 119215 01 4 SNOILINYISNI ONS 719 5310 153 23dSH31NI 1 30 1ndino r 13058 1 HO 38922 7 00 03 4 3HO0H JILOWN3SNd Ol iN3HHf2 833 1 1 5 1 833 1 lt 082 833 19 082 13004 902 5345 OUOSXO04 832nQ0SNOHL _ 1 YON 01140 09 0 0335 OL _ EC dha 1
16. Directive of the European Parliament and the Council of 29 1997 on the approximation of the laws of the member states concerning pressure equipment Sprigg House 2003 William T Wright Manager PIBU R amp D Spring House John J Sweeney Appr vals Coordinator 50771 Annex to the EC Declaration of Conformity Conformance to the directives indicated an page 1 is assured through the application of the following standards certifications and assessments Directive 88 336 EC Electromagnetic Compatibility Conformance to directive 89 336 EC is based on conformance with the following standards Standard Description EN 50081 1 1992 Electromagnetic compatibility Generic emission standard Part m 1 Residential commercial and light indust EN 50081 2 1993 Electromagnetic compatibility Generic emission standard Part 2 industrial environment Electromagnetic compatibility EMC Part 6 1 Generic standards Immunity for residential commercial and light industrial environments Electromagnetic compatibility Part 6 2 Generic standards Immunity for industrial environments Directive 97 23 EC Pressure Equipment This product has been designed and manufactured in accordance with Article 3 Paragraph 3 of the Pressure Equipment Directive 97 23 EC 2 0 INSTALLATION This section describes transducer installation in hazardous and non hazardous locations Each
17. E Coil Assembly Part Numbers Range Input Output Symbol Part No 1 5mA 4 20 mA 4 20 mA 10 50 mA 3 15 psig 3 27 psig 3 15 psig 3 15 psig Intrinsically Safe Model F1 12334 78 12334 112 12334 103 12451 6 Non Incendive 12334 20 Model F2 27 50771 8 0 HAZARDOUS LOCATION INSTALLATION DRAWINGS 0 2 2 lt 0 lt 1 5110130 12205 2205 335 5 0118211448 5597 03 003 31035 11 1570 b NOILIGNOD 0119201 SnOQHBZUH II 55012 NI 3HJS INT WIS NIUHU NOIIHSN3UND3 3H25 1 35 5 00 5 5 544 Y3d 0311015 38 1 H3IBHOG 13485 8 LSNI 3396 6 03323X3 LON HiHd3 3 0015 ANY N33 Ll38 32NU1SIS3H WNOTtdO SI 030NBH1S 01705 439801 HO ON 03151 1 38 5 SNINIA 02 S13n O0Hd 3H00H H3IHHUB NHl3H NON 8 38 ISnH SH3IHHUB JO INO SSILIHUWd LON 00 SH3IHHUH 3AIIUS3N 30 HIGd Skrin 111509 30 350 LSAW 952 0332 3 LON 1608 OL 03123 02 1102412 NI 39910A 11084 HOHIXUM 01 NAOHS 349 SNOILDSNNOD WOIdAL 71 13385
18. Linearity Standard Capacity Models Boosted Models Hysteresis Standard Capacity Models Boosted Models Repeatability Dead Spot Response Level Electrical Classification F1 Model Number Suffix F2 Model Number Suffix CE Marked Pressure Equipment Directive SD771 0 16 SCFM 20 psig supply 2 0 SCFM 20 psig supply Less than 0 25 SCFM 20 psig supply 0 2 SCFM 20 psig supply 40 C 40 F to 80 C 176 F 1 4 NPT 1 8 NPT Less than 0 5 of span Less than 1 of span Less than 0 1 of span Less than 0 25 of span Better than 0 02 psi Less than 0 05 of span lt 0 025 of span Intrinsically safe for Class I II III Division 1 Groups D F amp G when installed in accordance with Siemens drawing 15032 7704 or 15032 7705 N on incendive for Class I Division 2 Groups A B C amp D Dust ignition proof for Class II Division 1 Groups E F amp G Suitable for Class III Division 1 and NEMA 4 EMC Directive 89 336 EC EN50081 1 EN50081 2 EN61000 6 1 EN61000 6 2 Designed and manufactured in accordance with Article 3 Paragraph 3 of Directive 97 23 EC 50771 1 2 1 5 Hazardous Locations This section provides CSA hazardous location precautions that should be observed by the user when installing or servicing the equipment described in this manual These statements supplement those given in the preceding section A WARNING Explosion can cause death or serious injury Failure t
19. SIEMENS INSTALLATION AND SERVICE INSTRUCTION 50771 7 February 2006 Supersedes Issue 6 MODEL 7715 MODEL 771B Model Series 771 I P Valve Service Transducers 50771 TABLE CONTENTS SECTION AND TITLE PAGE 52220 3 LEO TNTRODUCTICONZG 6 6 A TION cea A Mrs ATUS o E MEE NE E 7 L2 6A Hazardous LOCION S 8 1 3 PRODUCT SUPPORT oanien E ___ ____ 9 TION 11 CBE BU 6 12 2 INSTRUMENT AIR RBOUIRENMEBN TS 14 EM EM mU E Nom 14 DAE XA TEA 14 2 9 SHIPPINGAND RESTRICTION SCREWS 15 DO VN AS DAMM 15 240 MOUELS
20. T PORT ZERO ADJUSTMENT SCREW SEALING SEEN CONDENSATION RAIN HOLE 9 1 4 20 x 0 44 POLES FOR MOUNTING Y 1 2 CONDUIT EN 47 2 25 N REAR SIDE V IA EAR VIEW uu E VIEW ES Ie WIRE RED 4 0690 YELLOW pu FIGURE 2 2 Installation Boosted Models 1 4 50 114 30 g 1 l 124 50 0 12 4 aa Ole zc 3 05 069 17 53 BOOSTED 0 38 986 2 69 23470 STANDARD CAPACITY MODELS 7 87 199 90 6 80 MOUNTING 173 00 SCREWS AND HOLES FOR 6 06 MOUNTING m TRANSDUCER f t AMET m N HOLES FOR Gum ve ADAPTER NOTE WALL MOUNTING B PLATE DIMENSIONS ARE IN INCHES AND MILLIMETERS FIGURE 2 3 Optional Mounting Adapter Plate Models 13 50771 2 2 INSTRUMENT AIR REQUIREMENTS Connect the transducer to a source of clean dry oil free instrument air Failure to do so will increase the possibility of a malfunction or a deviation from specified performance CAUTION A Use of process fluids other than instrument air is not recommended No claim is made as to the suitability of this product for use with other process fluids such as hazardous gases except as listed on the appropriate certificate Non approved instruments are suitable for use with instrument
21. Transducer nameplate shows the hazardous location classifications for which that transducer has been Factory Mutual System approved and or Canadian Standards Association certified transducer installations should be in accordance with either the current edition of the National Electrical Code NEC or the Canadian Electrical Code CEC as required by local regulations A WARNING Explosion can cause death or serious injury Failure to observe the following precautions could result in an explosion hazard Installation in hazardous locations must be in accordance with either the NEC or the CEC as required by local regulations F1 suffix models must be used in conjunction with energy limiting barriers See drawing 15032 7704 15032 7705 in Section 8 See Section 1 2 Specifications for additional information 11 50771 A typical intrinsically safe system consists of one more suffix transducers installed in a hazardous area required quantity of appropriate energy limiting barriers installed in a non hazardous location and the needed length of interconnecting twisted pair cables 2 1 MOUNTING Figures 2 1 and 2 2 show dimensions mounting hole locations electrical access and pneumatic connections Mount the transducer in an upright vertical position Tilting up to 10 from vertical will not affect its operation CAUTION Mounting the transducer where the specified ambient temperature limits may
22. acing the instrument in operation Turn the restriction screw in tightly for proper operation If the transducer is to be moved to another location return the shipping and restriction screws to their original positions to protect the nozzle See Figure 2 4 for the positions EXTERNAL EXHAUST PORT STANDARD CAPACITY MODELS TOP VIEW FRONT VIEW MODELS ONLY EXTERNAL EXHAUST PORT SEALING SCREW 1 BOOSTED MODELS ONLY PCS RESTRICTION PORT ALL MODELS ACCESS COVER REMOVED SCREW ALL MODELS SHIPPING SCREW YELLOW SHIPP INPUT WIRE CONDENSATION DRAIN HOLE NG SEALING SCREW 1 ALL POSITIONS MODELS FRONT OPTIONAL nee GROUND SCREW SHIPPING SCREW LOCATION ALL MODELS RESTRICTIONSCREW ff o d RED INPUT WIRE OPERATING BOSTON 1 2 CONDUIT 2 18 GAUGE WIRE 18 EACH 0693 1 0 5 PLACE SCREWS IN THEIR 1 SEALING SCREW MUST NOT BE REMOVED IN ANY CLASS 2 HAZARDOUS SHIPPING POSITIONS BEFORE BEFORE lign LOCATION OR UNDER ANY NEMA 4 CONDITION LOCATION PA 0695 1 2 ALL WIRING MUST BE ROUTED THROUGH CONDUIT CONNECTION Shipping and Restriction Screws Exhaust Alignment and Electrical Connections FIGURE 2 4 Restriction Screw and Exhaust Port Locations and Electrical Connections 2 6 WIRING A transducer is provided with two 18 18 AWG 0 96 mm wires that exit the enclosure Optionally these wires are terminated at a terminal strip within the enclosure Figu
23. and use the following procedure 1 Make three cardboard or paper shims 0 13 thick x 1 1 2 long x 3 8 wide 3 3 mm x 38 mm x 9 5 mm These can be made from a matchbook cover Center the coil so that it does not rub against the transducer housing or the pole piece under the coil Also position it so the leaf springs do not buckle or snap If not already done loosen the spring clamping plate screw Insert the shims between the coil and the housing at the points shown in Figure 5 1 Insert the shims until their ends are flush with the top surface of the housing Then raise the coil to a higher point on the shims by pulling the center shaft up Rotate the coil on the center shaft so that the leaf springs are perpendicular to the clamping plate and equidistant from the center shaft Tighten the clamping plate screw and remove the shims Move the coil up and down on the center shaft Treat the center shaft as though it were a feeler gauge being used to check a point gap The coil must not rub against the housing or the pole piece and the leaf springs must not buckle or snap e If rubbing is detected repeat the above steps Ifa leaf spring snaps to a different curvature the coil is rotated a little too far to the left or right Repeat the above steps SPRING CLAMPING SCREW POSITION OF SHIMS FIGURE 5 1 Coil Alignment 5 6 FLOAT REPLACEMENT Removal Refer to the parts list at the rear of this Instruction and th
24. ating Dust tight seals are required for Class II applications See service instructions for details For installations in accordance with the CSA Certification choose barriers with parameters as follows Groups A B C D Groups C D only Vmax 10 V Rmin 50 Ohms Vmax 28 V Rmin 175 Ohms Vmax 15 V Rmin 100 Ohms Vmax 23 V Rmin 150 Ohms Vmax 28 V Rmin 300 Ohms or Stahl series 8903 68 mA 41 Vmax 1 Details Approved Control Drawing for p Model 77 and 771 E P Transducers Drawing No Moore Products Co Spring House PA USA 19477 15032 7705 Sheet of 1 FIGURE 8 4 Intrinsically Safe Connection Diagram Model 77 and 771 Entity Parameters 21
25. calibration of the standard capacity and boosted models The transducer housing for some units may be different from that shown elsewhere in this instruction A range screw may be present see Figure 4 1 performance specifications remain as stated 15 not necessary to adjust the range screw during calibration 17 50771 0692 1 Standard Housing Housing with Range Screw FIGURE 4 1 Housings 4 1 TEST EQUIPMENT Gather the following equipment to calibrate the transducer For any instrument the test equipment used for calibration should be at least twice as accurate as the specified accuracy of the instrument being calibrated l 2 4 0 50 mAdc source Digital Multimeter Accuracy to 0 146 of reading Test Gauge Range 0 15 psig 0 30 psig for 3 to 27 psig output 0 02 psi per division accurate to 0 6 of full scale Supply Air Source 20 psig 4 2 PROCEDURE 16 Position the Transducer so that it is upright and within 10 degrees of vertical If the transducer has been lying on its side allow approximately 15 minutes before attempting a final calibration This allows the transducer s viscous damping fluid to collect at the bottom of the transducer Refer to Figures 2 1 2 2 and 2 4 and connect the test equipment to the transducer Connect the test gauge to the Output port 2 Connect the supply air source to the Supply connection 3 Connect the current source and digital multimeter to the t
26. chips dirt and other contaminants from entering the coil chamber Foreign objects can interfere with coil movement and can change the magnetic field Refer to the Parts List section at the rear of this Instruction and the following procedure 1 For access e Standard capacity model Remove the top housing four screws and lockwashers Boosted model Remove the pilot base exhaust ring and nozzle housing six screws and lockwashers 2 Remove the brass clamping plate one screw 3 Remove the two Teflon washers 4 Slide the bowed E retaining ring off the shaft IMPORTANT To prevent bending of the center shaft support it while removing the retaining ring 5 Remove the coil assembly by carefully lifting it off the center shaft Installation Refer to the Parts List section at the rear of this Instruction and the procedure that follows IMPORTANT The coil assembly and coil chamber must be free of metal chips dirt and corrosion before installing the coil 1 Lower the coil assembly onto the center shaft and at the same time guide the leaf springs onto the contact posts 2 Install the bowed retaining ring on the center shaft bowed center up 3 Install the Teflon washers small diameter up clamping plate and clamping plate screw Do not tighten screw at this time it must be loose until the coil is aligned Refer to the Alignment procedure below 22 50771 Alignment Refer to Figure 5 1
27. dresses telephone numbers and related information for customers to access Siemens product support When contacting Siemens for support Please have complete product information at hand For hardware this information is provided on the product nameplate part number or model number serial number and or version e For most software this information is given in the Help gt About screen If there 15 a problem with product operation e 15 the problem intermittent or repeatable What symptoms have been observed e What steps configuration changes loop modifications etc were performed before the problem occurred What status messages error messages or LED indications are displayed e What troubleshooting steps have been performed e 15 the installation environment e g temperature humidity within the product s specified operating parameters For software does the PC meet or exceed the minimum requirements e g processor memory operating system A copy of the product Service Instruction User s Manual or other technical literature should be at hand The Siemens public Internet site see the table has current revisions of technical literature in Portable Document Format for downloading To send an instrument to Siemens for repair request Return Material Authorization RMA IMPORTANT An instrument must be thoroughly cleaned decontaminated to remove any process materials hazardous materials or blood b
28. e following procedure 1 Invert the transducer and remove the bottom plate Keep the transducer inverted to prevent spilling of the Silicon fluid If fluid spills it must be replaced Refer to Damping Fluid below 2 Gently push the float downward and remove its retaining cotter Lift out the float 3 the float positioning spring off the center shaft Installation Installation 1s the reverse of removal A new bottom plate gasket is recommended and the bottom plate must be tightened securely 29 50771 IMPORTANT traces of Silicon fluid must be wiped from the bottom plate both sides of the gasket and the bottom surface of the housing Otherwise the fluid will seep past the gasket regardless of how much the screws are tightened Check the amount of fluid in the bottom chamber before installing the gasket and plate See Damping Fluid below Damping Fluid The bottom chamber contains 43cc of Dow Corning DC 200 Silicone fluid 200 centistokes viscosity Small bottles of this fluid enough for a little more than one complete fill may be ordered PN 12334 43 Check the fluid depth by inverting the transducer removing the bottom plate and inserting a 6 or equivalent metric pocket scale between the float and the housing Allow the scale to bottom in the housing Fluid depth should be approximately 3 4 19 mm IMPORTANT traces of Silicon fluid must be wiped from the bottom plate both sides of the gasket and
29. er should be referred to one of the support groups listed in the Product Support section of this manual The contents of this manual shall not become part of or modify any prior or existing agreement commitment or relationship The sales contract contains the entire obligation of Siemens The warranty contained in the contract between the parties 15 the sole warranty of Siemens Any statements continued herein do not create new warranties or modify the existing warranty General Warnings and Cautions This equipment contains hazardous voltages and it has been certified for use in hazardous locations specified on the product nameplate and in the Model Designation and Specifications section Death serious personal injury or property damage can result if safety instructions are not followed Only qualified personnel should work on or around this equipment after becoming thoroughly familiar with all warning safety notices and maintenance procedures contained herein The successful and safe operation of this equipment is dependent upon proper handling installation operation and maintenance The perfect and safe operation of the equipment is conditional upon proper transport proper storage installation and assembly as well as on careful operation and commissioning The equipment may be used only for the purposes specified in this publication CAUTION Electrostatic discharge can damage or cause the failure of semiconductor d
30. especially in the output Leak test all fittings and tube connections 2 4 EXHAUST ALIGNMENT The transducer has two exhaust ports one external at the front of the top housing and the other internal behind the access cover see Figure 2 4 As shipped two sealing screws are installed one 15 installed in the external exhaust port at the front of the top housing and a second 1s installed in the condensation drain This configuration allows the transducer s exhaust air to purge the terminal enclosure the conduit and associated electronic enclosure if used CAUTION A Do not remove either the exhaust sealing screw or the condensation drain sealing screw in a Class II hazardous location or under any NEMA 4 condition If airtight conduit conduit fittings and electronic enclosures are used move the exhaust sealing screw to the internal exhaust port in the terminal enclosure Figure 2 4 and remove the condensation drain sealing screw This allows the transducer exhaust to vent to atmosphere through the external exhaust port It also allows any accumulated condensation from the instrument air supply to drain from the coil cavity 14 50771 2 5 SHIPPING RESTRICTION SCREWS A standard capacity model has a factory installed shipping screw in the center of the top housing to protect the transducer s nozzle during shipment The restriction screw stamped R 15 located just behind the shipping screw Interchange these two screws before pl
31. evices such as integrated circuits and transistors The symbol at right may appear on a circuit board or other electronic assembly to indicate that special handling precautions are needed Aproperly grounded conductive wrist strap must be worn whenever an electronics module or circuit board 15 handled or touched A service kit with a wrist strap and static dissipative mat is available from most electronic supply companies e Electronic assemblies must be stored in anti static protective bags when not installed in equipment 50771 1 0 INTRODUCTION This instruction describes installation operation and maintenance of Model Series 771 I P Valve Service Transducers These transducers are intended to be used for valve service They provide a pneumatic output that is proportional to a mAdc input Input and output ranges are stated below in Section 1 1 Model Designation Two standard models are available standard capacity output and boosted output see the Model Designation section Transducers with model number suffix or F2 are Factory Mutual System approved for installation in various National Electrical Code classified hazardous locations Note that particular attention must be given to the installation and maintenance of transducers whose model numbers have the suffix These models are FM approved to be part of an intrinsically safe system when installed and maintained according to the requirements outlined in this instructi
32. irt loosen it mechanically or with a solvent and blow down again Screen Replacement If a screen is damaged or cannot be cleaned it must be replaced 6 Clean the supply seat in the pilot base with a solvent or with a tobacco pipe cleaner 7 Clean the exhaust seat in the booster diaphragm assembly with a tobacco pipe cleaner 5 3 2 Exhaust Ring Pilot air filter screen cleaning requires that the pilot base and exhaust ring be removed from the transducer 1 Remove the pilot base and exhaust ring 2 Separate the exhaust ring from the pilot base 3 Blow compressed air through the screen in the reverse direction If this does not dislodge the dirt loosen it mechanically or with a solvent and blow down again Screen Replacement If a screen is damaged or cannot be cleaned it must be replaced Each screen is retained by a fiber washer Be sure that replacement fiber washers are on hand before removing a screen 5 3 3 Nozzle Housing The restriction screw can be cleaned without removal of the pilot base exhaust ring or nozzle housing These three items however must be removed to clean the nozzle nozzle seat and restriction tube 1 Remove restriction screw from the nozzle housing 2 Clean the restriction screw with a solvent It may be necessary to soak the screw in solvent for several minutes If solvent does not clean the restriction run a 0 028 drill blank through the restriction from the tip of the screw 3
33. le for repairs made by the user 50771 Conventions and Symbols The following symbols may appear in this manual and may be applied to the equipment The reader should become familiar with the symbols and their meaning Symbols are provided to quickly alert the user to safety related situations issues and text Indicates an immediate hazardous situation which if not avoided will result in death serious injury Indicates a potentially hazardous situation which if not avoided could result in death WARNING Or serious injury Indicates a potentially hazardous situation which if not avoided may result in minor CAUTION or moderate injury Indicates a potentially hazardous situation which if not avoided may result in CAUTION property damage Indicates a potential situation which if not avoided may result in an undesirable NOTICE result or state Identifies an action that should be taken to avoid an undesirable result or state Identifies additional information that should be read Electrical shock hazard The included Warning text states that the danger of electrical shock is present Electrical shock hazard Indicated that the danger of electrical shock is present Explosion hazard Indicates that the danger of an explosion hazard exists Electrostatic discharge The presence of this symbol indicates that electrostatic discharge can damage the electronic assembly Conventions and Usage Notes
34. ndino JO S ALI2QUdU 104100 2 Qr 91 8 86 lt 139NUJ 1102 8 3 NJA OIH3HdSOMIBU 8 14038 122 73004 HO 39922 1300W 02 512 2 Ol SLWA 81 8 Y INANI 30 1 61 0 8 NOISIAIO III 55812 9 3 4 3 Sdh0OJ9 I NOISIAIG II 55872 3 2 8 5 5400892 NOISIAIG I 55912 2 8 8 54008941 NOISIAIG I 55812 NOI1U201 5 00 928 0119201 0 Installation Model 77 or 771 8 Foxboro Spec 200 Interspec Nest FIGURE 8 2 Intrinsically Safe 29 50771 30 13385 v0ZZ 2ag0si UM OPES _ 5 s w w ol 3 Zi 22 00 A1330S M 15 1 3395 ATIUOISNIHIAINI WSN 2eGl ud 35870H 45 05 513100 3400H __ 65 2 1 os NOISIA3U ANY 380338 d03UifiD3H TWAOUddY A9N19V i 1081802 VS2 3 SAA SSA 34 34 SSA SIA SAA 34 53A 34 SAA S3A SJA SJA 34 53 SAA SAA SSA 3A SAA 5 53 SAA SJA SSA SJA 53A 53 SAA SJA S34 S34 933 3313 343 333 0389 0989 0289 0289 III 55612 II 55812 I 55872 62 0088 62 7271068 67 000 891 v9 1068 6 000 260 1268 6 000 52 lt 1068 6 000 891 lt lt 1068 6 000 260 lt lt
35. nt Air 15 57 3 5 2 CLEANING STANDARD CAPACITY MODELS The filter screens restriction screw nozzle and nozzle seat can be cleaned without dismounting the transducer AII are located in the top housing refer to the parts list at the end of this instruction for disassembly and assembly Refer to the Parts List as needed for part identification 5 2 1 Filter Screens There 15 a filter screen in the supply IN port and in the output OUT port 1 Remove transducer from service Remove supply air from the transducer 2 Remove four screws and lockwashers from the top housing Remove the housing by pulling straight up 3 Blow the two screens down in a reverse direction Remove the restriction screw turn counterclockwise with a screwdriver 2 Cover the nozzle opening with a finger Blow compressed air into the port from which the restriction screw was removed If the dirt remains loosen it mechanically or chemically and repeat the blow down procedure Screen Replacement If a screen is damaged or cannot be cleaned it must be replaced 4 clean the restriction screw and the nozzle and nozzle seat go to Section 5 2 2 below Otherwise continue to step 5 5 Install the restriction screw in the top housing 6 Install the top housing and secure with the four screws and lockwashers removed earlier 5 2 2 Restriction Screw Nozzle and Nozzle Seat 1 Therestriction is accessible from the tip of the screw Clean the
36. o observe the following precautions could result in an explosion hazard Installation in hazardous locations must be in accordance with the Canadian Electrical Code as required by local regulations Precautions English For Class I Division 1 and Class I Division 2 hazardous locations e Use only factory authorized replacement parts Substitution of components can impair the suitability of this equipment for hazardous locations For Division 2 hazardous locations When the equipment described in this Instruction in installed without safety barriers the following precautions should be observed Switch off electrical power at its source in non hazardous location before connecting or disconnecting power signal or other wiring Pr cautions Francais Emplacements dangereux de classe I division et classe I division 2 Les pi ces de rechange doivent tre autoris es l usine Les substitutions peuvent rendre cet appareil impropre l utilisation dans les emplacements dangereux Emplacement dangereux de division 2 Lorsque l appareil d crit dans la notice ci jointe est install sans barri res de s curit doit couper l alimentation lectrique a la source hors de l emplacement dangereux avant d effectuer les op rations suivantes branchment ou d branchement d un circuit de puissance de signalisation ou autre 50771 1 3 PRODUCT SUPPORT This section provides the Internet site addresses e mail ad
37. on and in the installation instructions provided by the energy limiting barrier manufacturer IMPORTANT Save this Instruction and make it available for installation and maintenance of the transducer The transducers meet the requirements of a NEMA4 enclosure Consideration must be given to exhaust alignment to maintain the enclosure requirements as stated the Section 2 Installation of this instruction 1 1 MODEL DESIGNATION Sample Model Number TI 16 S N Fl I P Transducer 2 4 Input Output Range see table below Output Capacity B Boosted S Standard Options None T Terminal Strip Electrical Approval Factory Mutual N None F1 Intrinsically Safe F2 Non Incendive Note For approval details see Electrical Classification in Section 1 2 Specifications May be manufactured by either Siemens or Moore Products Co 6 1 2 SPECIFICATIONS Supply Pressure 3 15 psig Output Models Normal Tbe id Maximum Standard Capacity Models Boosted Models 3 27 psig Output Models Normal Maximum Effect Standard Capacity Models Boosted Models Output Capacity Standard Capacity Models Boosted Models edic ry eto t rate ds Maximum Air Consumption Standard Capacity Models Boosted Models uec eet ut ee Ambient Temperature Limits Pneumatic Connections Standard Capacity Models Boosted Models Independent
38. oosted Models Output above full scale and Place shipping screw in operating will not reduce position position Clear exhaust port Set supply air to 20 psig Leak in output line or fittings Repair leak Clogged filter screen Clean screen s See Section 5 2 Cleaning Standard Capacity Models or 5 3 Cleaning Boosted Models Calibrate transducer See Section 4 Calibration Output will not increase to Align the coil See Section 5 5 Coil full scale Assembly Replacement Foreign object interfering with coil Clean out coil chamber See Section movement 5 2 Cleaning Standard Capacity Models or 5 3 Cleaning Boosted Models Loss of silicon fluid Replace fluid See Section 5 6 Float Fluid loss will not occur unless bottom Replacement section cover has been loosened or removed Table continues on next page 21 50771 Symptom Possible Cause Calibration Align the coil See Section 5 5 Coil Output will not decrease to Assembly Replacement start of scale Foreign object interfering with coil Clean out coil chamber See Section movement 5 2 Cleaning Standard Capacity Models or 5 3 Cleaning Boosted Models Heavy exhaust output will Valve plunger exhaust seat held open by Clean valve plunger and seats See 5 3 not increase to full scale thread shaving chip scale etc Cleaning Boosted Models boosted models 5 5 ASSEMBLY REPLACEMENT Removal When disassembling the transducer take care to prevent metal
39. orn pathogens prior to return for repair Read and complete the Siemens RMA form s TABLE 1 1 Contact Information Telephone 1 800 569 2132 option 2 for Siemens and Moore brand instruments United States 1 215 283 6358 PITechSupp G sea siemens com f Ameri 0 Hours of Operation 5 a m to 4 45 p m eastern time Monday Friday except holidays Public Internet Site http www sea siemens com ia 1 215 646 7400 extension 3187 For contact information outside the U S A visit the Siemens public Internet site see the above table for the URL locate Customer Support Process Instrumentation and click on the Contact Tech Support link to access the Global Support link The current revision of this publication and other Siemens technical publications can be found at the Siemens public Internet site The publications are in Portable Document Format PDF 50771 10 SIEMENS EC Declaration of Conformity Manufacturer siemens Energy amp Automation Inc Address 1201 Sumneytown Pike Spring House 19477 Product Model 771 Valve Service Transducer The product described above when marked with the CE mark is in conformity with the provisions of the following European Directives 89 336 Council Directive of May 1989 the approximation of the laws of the member states relating to electromagnetic compatibility amended by 91 263 EEC 92 31 EEC 93 68 EEC and 93 97 EEC 97 23
40. place or if repair or replacement does not remedy the nonconformity Seller and Buyer shall negotiate an equitable adjustment in the contract price which may include a full refund of the contract price for the nonconforming goods c SELLER HEREB Y DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED EXCEPT THAT OF TITLE SPECIFICALLY IT DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE COURSE OF DEALING AND USAGE OF TRADE d Buyer and successors of Buyer are limited to the remedies specified in this article and shall have no others for a nonconformity in the goods Buyer agrees that these remedies provide Buyer and its successors with a minimum adequate remedy and are their exclusive remedies whether Buyer s or its successors remedies are based on contract warranty tort including negligence strict liability indemnity or any other legal theory and whether arising out of warranties representations instructions installations or non conformities from any cause e Note The above does not apply to any software which may be furnished by Seller In such cases the attached Software License Addendum applies 24 50771 7 0 PARTS LIST Model Series 771 Valve Service Transducers Drawing No 15791PL 9 03 Supersedes 2 92 IMPORTANT Service Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the Product Support section of this instruction
41. res 2 1 2 2 and 2 4 locate the access cover and the 1 2 conduit connection Route all wiring through the conduit connection As shipped from the factory the conduit connection is a vent path for the transducer s exhaust Refer to the Section 2 4 Exhaust Alignment if airtight conduit or fittings are used The recommended wire size is 22 AWG 0 38 mm stranded or solid Use insulated crimp on ring tongue or spring spade tongue terminals for 6 screws Use of a high quality crimping tool is recommended 25 50771 special considerations are required for wiring non intrinsically safe transducer However intrinsically safe models must be installed as detailed in the next section 2 6 1 Intrinsically Safe Models An suffix model is considered intrinsically safe only when it has a nameplate with the FM logo and the words INTRINSICALLY SAFE Install the transducer in strict compliance with the instructions furnished by the barrier manufacturer and in accordance with Siemens drawing 15032 7704 FM and CSA or 15032 7705 FM only See Section 1 2 Specifications for additional information See Section 8 for the referenced drawings 1 Install the F1 suffix model transducer in the hazardous area as detailed by this section of this instruction 2 Install the required energy limiting barriers in the non hazardous area Refer to the barrier manufacturer s instructions and to the appropriate connection diagram in this instruction
42. restriction with a solvent If the solvent does not clean the restriction run a 0 021 inch drill blank through the restriction from the tip of screw Inspect the O ring on the restriction screw Replace the O ring if damaged Install the restriction screw in the top housing Go to Section 5 2 3 Hox Se d The nozzle is part of the top housing The nozzle seat is in the transducer housing the seat is the top end of the center shaft See Figure 3 1 Clean the nozzle and nozzle seat by wiping with a dry cloth or a solvent dampened 19 50771 cloth Do not use abrasive cleaning agents The important parts of nozzle to clean its inner diameter surfaces and the sharp edge of its face 6 Install the top housing and secure with the four screws and lockwashers removed above 5 3 CLEANING BOOSTED MODELS The items that may require cleaning on a periodic basis are shown in the following table Refer to the Parts List as needed for part identification Pilot Base Exhaust Ring Nozzle Housing Supply air filter screen Pilot air filter screen 5 3 1 Pilot Base Remove the Transducer from service Remove supply air Remove the retaining nut in the pilot base with a 9 16 wrench Remove the valve plunger and supply air filter screen These should fall out along with the plunger spring Clean the valve plunger with a solvent AA dM Blow compressed air through the supply air filter screen If this does not dislodge the d
43. serves as a nozzle seat that restricts the flow of air exhausting from the nozzle 3 1 STANDARD CAPACITY MODEL Supply air is routed to the nozzle through a restriction The restriction and the nozzle form a pressure divide circuit The pressure in the nozzle actually a backpressure varies according to the restrictive effect imposed by the nozzle seat The nozzle backpressure is the output of the transducer The nozzle forms a column of air that has a diameter equal to the nozzle diameter This column of air acts on the nozzle seat to oppose and equal the force produced by the coil The force produced by the coil is continuously balanced by the nozzle backpressure so that the transducer output pressure 15 at all times directly proportional to the coil current The Zero adjustment is provided by a screw that varies a spring force on the moving coil assembly 16 50771 EY EXHAUST PLUNGER NOZZLE RESTRICTION mm BOOSTER EXHAUST SUPPLY PORT TUBE eS BOOSTER SEALIN OUTPUT SCREW et n DIAPHRAGM f ASSEMBLY EXHAUST RESTRICTION PORT NOZZLE SEAT aq ue i sspe PE 22 s 525 NOZZLE SCREW E Bp INPUT COIL NOZZLE SEAT B Ue PERMANENT SEALING SCREW CONDENSATION MAGNET mS rent e DRAIN HOLE ENTER SHAFT SEALING SCREW POLE m ZERO PIECE CENTER SHAFT SCREW S ZERO B d MAGNET
44. wo signal input wires or optional terminal block Observe polarity Standard capacity model only Refer to Section 2 5 and install the restriction screw stamped R in its operating position instruction label on the transducer also explains the steps involved Set the milliamp source to the starting point value for the input signal range e g 4 mA for a 4 to 20 mA range Adjust the transducer s ZERO for a 3 psig output The ZERO adjustment screw changes the operating level Turn the screw clockwise to raise the output pressure Exercise the milliamp source from the transducer s minimum input to maximum input and then to minimum input e g 4 mA to 20 mA to 4 mA Transducer output should be 3 psig If not repeat step 4 and retest 50771 5 0 This section provides detailed procedures for cleaning standard capacity and boosted models Troubleshooting transducer is described and procedures are provided for coil assembly and float replacement All maintenance procedures require a transducer to be removed from service WARNING Improper service and or substitution of components may impair the electrical safety of the instrument 5 1 PREVENTIVE Most problems associated with pneumatic instruments can be avoided by the use of clean dry oil free instrument air Refer to Section 2 2 Instrument Air Requirements in this manual and to the Instrument Society of America s publication Quality Standard for Instrume
Download Pdf Manuals
Related Search