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Dresser Masoneilan SVI II AP, Инструкция по эксплуатации

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 SVI II AP Instruction Manual

56

DRAFT 6/

8/10

 Dresser Masoneilan

Figure 32

VIEW DATA Menu

+

+

SINGLE OR DOUBLE

*

*

PRESSURE UNITS

*

T.S. ON OR T.S.OFF

SIG HIGH

*

VIEW DATA

ACTUATOR TYPE

VALVE CHARACTERISTICS

LINEAR, EQ% 30:1, EQ% 50:1, EQ% CAMFX, QUICK 50, CUSTOM

PSI, BAR, KPA

TIGHT SHUTOFF 

ACTION TYPE

SIG LOW 

ATO or ATC

*

*

*

VIEW ERR

Содержание Masoneilan SVI II AP

Страница 1: ...Instruction Manual EW2002 AP 06 10 Rev D SVI II AP Digital Positioner With Remote Position Sensor Putting You In Control ...

Страница 2: ...ValVue version 2 4 or greater q with AMS ValVue SNAP ON version 2 4 or greater q with ValVue PRM Pug in q with Model HH375 HART Communicator with DD published for SVI II AP The information in this manual is subject to change without prior notice The information contained in this manual in whole or part shall not be transcribed or copied without Masoneilan s written permission In no case does this ...

Страница 3: ... WARNING hazards are related to personal injury CAUTION hazards involve equipment property or data damage Operation of damaged equipment can under certain operational conditions result in degraded process system performance that can lead to injury or death Total compliance with all WARNING and CAUTION notices is required for safe operation Indicates a potentially hazardous situation which if not a...

Страница 4: ... Used only in situations that comply with the certification conditions shown in this document and after verification of their compatibility with the zone of intended use and the permitted maximum ambient temperature q Installed put into service and maintained by qualified and competent professionals who have undergone suitable training for instrumentation used in areas with potentially explosive a...

Страница 5: ...p 12 Mounting the Positioner 12 Filter Regulator and Tubing 13 Mounting the SVI II AP on Rotary Valves 13 Required Tools 13 Rotary 90 16 Magnet Orientation on Rotary Valve Shafts 17 Dismantling the SVI II AP from Rotary Valves 17 Mounting the SVI II AP on Reciprocating Valves 17 Mounting the SVI II AP on a Reciprocating Actuator 17 Dismantling the SVI II AP from Reciprocating Valves 20 Installing ...

Страница 6: ...sing the Digital Interfaces 45 Overview 45 Local Display and Pushbuttons 45 HART Handheld Communicator 45 ValVue 46 Pushbuttons and Local Display 46 Pushbuttons 47 Display Menus 49 NORMAL Operating Mode and MANUAL Mode Menus 49 Configure Menu 50 Calibration Menu 54 VIEW DATA Menu 55 FAILSAFE Mode 57 VIEW ERR Diagnostics Messages 58 Display and Clear Error Messages 61 Positioner Fault Messages 61 R...

Страница 7: ...rconnection Requirements 87 Capacitance vs Length of Cable for HART 87 HART Filter Required for Certain Control System Output Circuits 87 Split Range Applications 88 Setting Loop Addresses for Split Range Systems 89 Multiple Output Circuit Control System 90 Isolators 91 Supplemental Power Supply 93 Verify Wiring and Connections 93 Required Practices for Explosion Proof Installations 94 Clarificati...

Страница 8: ...ding Firmware 114 Tools Required 115 Installing Firmware Upgrade 115 A Specifications and References 117 Physical and Operational Specifications 117 Spare Parts 123 B Air to Open and Air to Close Actuators 127 Actuator Action 127 C Air Supply Requirements 131 Air Supply Requirements 131 D Adjusting Speed of Response 133 Adjusting Speed of Response 133 E Advanced Usage 135 Technology to Maximize Sa...

Страница 9: ...CD 27 20 SMARTS Assistant Commissioning the Remote Position Sensor 28 21 Air Ports on Single Acting Positioner 30 22 Air Ports on Double Acting Positioner 31 23 Magnet Orientation for Rotary Valves with Valve Closed 37 24 Magnet Orientation for 90 Valve Rotation with De energized Actuator 38 25 Magnet Holder for Reciprocating Valves 38 26 Reciprocating Valve Mounting Bracket 39 27 Connections to E...

Страница 10: ...Filter 98 45 Intrinsically Safe Installation with Galvanic Isolator 100 46 Block Diagram with I P Converter and Pressure Sensor 103 47 Pneumatic Module with Single Acting Relay 107 48 Double Acting Pneumatic Relay 108 49 SVI II AP Display and Pneumatic Covers 110 50 SVI II AP Model Numbering 122 51 ATO and ATC Action with Linear Positioner Characteristics 128 52 ATO and ATC Action in Percentage of...

Страница 11: ...sages 59 12 Pushbutton Lock Security Level 67 13 VIEW DATA Settings 69 14 Compliance Voltage for Single Channel Zener with 22 AWG Cable 84 15 Compliance Voltage for Galvanic Isolator with 22 AWG Cable 85 16 Compliance Voltage for No Barrier with HART Filter and Resistor and 18 AWG Cable 85 17 Supplemental Voltage for Split Range 93 18 Environmental Specifications 117 19 Operational Specifications ...

Страница 12: ...SVI II AP Instruction Manual This page intentionally left blank D R A F T 6 8 1 0 ...

Страница 13: ...ulfills the broadest range of applications It also communicates using the HART protocol An optional pushbutton and LCD display enables local operations of calibration and configuration functions Remote operations can be performed with ValVue software or any HART Registered host interface that has been pre loaded with the Device Description file DD for SVI II AP The SVI II AP is provided with Mason...

Страница 14: ...OM drive ValVue Trial Version The SVI II AP is provided with a trial version of ValVue For 60 days after the initial installation ValVue provides the capability of configuring calibrating diagnosing cloning trending and much more After the 60 trial period ValVue must be registered for use ValVue is a user friendly graphical interface that allows an efficient setup of an SVI II AP mounted on any co...

Страница 15: ...k sensor The difference between the position setpoint and position feedback is analyzed by the position control algorithm that sets a servo signal for the I P converter The output pressure of the I P is amplified by a pneumatic relay that drives the actuator Once the error between the setpoint and the valve position feedback is within range no other correction is applied to the servo signal in ord...

Страница 16: ...Condition Monitor Total Stem Travel Number of Valve Cycles Predictive Maintenance Data q Advanced Valve Diagnostics with ValVue Software and the Pressure Sensor Option q User adjustable Response Times q Split range Capability q Configurable High and Low Position Limits q Characterize Stroke q Linear q Equal Percentage 50 1 q Equal Percentage 30 1 q Quick Opening q 11 Point Custom Characterization ...

Страница 17: ...ur local Masoneilan representative Sales offices are listed on the back cover of this manual Conventions Used in This Manual Conventions used in this manual are as follows q Uppercase italicized letters are used when referencing a term used in the SVI II AP display window For example when indicating the term mode as in setup mode and referring to the display software operation the convention is to...

Страница 18: ...SVI II AP Instruction Manual This page intentionally left blank D R A F T 6 8 1 0 ...

Страница 19: ...AP is a high performance digital valve positioner that combines a local display with remote communication and diagnostic capabilities The SVI II AP is available with a variety of options to fulfill diverse applications and it communicates using the HART protocol Prior to beginning the installation process review the safety information on page iii at the beginning of this manual NOTE ...

Страница 20: ... AP Instruction Manual 8 D R A F T 6 8 1 0 Dresser Masoneilan Figure 2 SVI II AP Components SVI II AP Cover SVI II AP Assembled Electronics Module Pneumatic Train and Cover I P Module Relay Relay I P Manifold ...

Страница 21: ...VI II AP Dimensions 122 55 mm 34 00 mm 1 90 mm 38 10 mm 47 58 mm 74 97 mm 96 56 mm 34 00 mm 23 00 mm 74 97 mm 203 93 mm 8 03 in 4 825 in 4 93 in 125 33 mm 1 34 in 0 075 in 1 90 mm 0 075 in 4 19 in 106 36 mm 2 1 in 53 18 mm 1 5 in 1 87 in 2 95 in 3 8 in 145 37 mm 5 72 in 1 34 in 90 in 2 95 in Weight Standard 7 4 lbs 3 357 kg Center of Gravity Weight Stainless Steel 16 lbs 7 257 kg ...

Страница 22: ...e not documented in this guide call Masoneilan or your local Masoneilan representative Sales offices are listed on the last page of this document The steps necessary to complete the SVI II AP installation and software setup are outlined in Table 1 Table 1 SVI II AP Installation Steps Step No Procedure Reference 1 Attach mounting bracket to the actuator See page 13 for rotary valve and page 17 for ...

Страница 23: ...nd Ingress protection must conform to the data indicated on the label q Wiring and conduit must conform to all local and national codes governing the installation Wiring must be rated for at least 85º C 185º F or 5º C 41º F above max ambient whichever is greater q Approved wire seals against ingress of water and dust are required and the 1 2 NPT fittings must be sealed with tape or pipe dope in or...

Страница 24: ...ng an SVI II AP on both rotary and reciprocating actuated valves The mounting process can be broken down into the following q Attach the mounting bracket to the actuator q Install the magnetic assembly rotary only q Assemble the SVI II AP on the mounting bracket NOTE Mount the SVI II AP with the conduit connections down in order to facilitate drainage of condensate from the conduit Necessary Preca...

Страница 25: ...than 60 refer to Rotary 90 on page 16 Required Tools The following tools are needed to complete the rotary valve installation q 3 16 Hex Key with tee handle q 5 32 Hex Key q 3 mm 4mm 5mm Hex Key q 7 16 Wrench To mount the SVI II AP 1 Attach the SVI II AP rotary mounting bracket to the valve actuator using two 2 5 16 18 UNC flat head cap screws Mount the SVI II AP as shown in Figure 5 on page 15 AT...

Страница 26: ...net holder The magnetic axis is the imaginary line through the center of both magnets 6 Rotate the magnet holder so that the magnet axis is vertical when the valve is in the closed position See Figure 5 and Figure 6 7 Align the end of the magnet holder flush with the end of the mounting bracket Secure the magnet holder with two M6 set screws 8 Slide the V Seal over the magnet holder 9 Secure the S...

Страница 27: ...D R A F T 6 8 1 0 15 Required Tools Installation and Set Figure 5 Camflex ATO Mounting Front View Figure 6 Mounting Bracket on Air to Close Actuator ...

Страница 28: ...ary Actuator Type Magnet Setting ATO Magnet Setting ATC Camflex Actuator is energized __ Magnet Axis is Vertical Figure 6 Camflex Actuator is de energized Magnet Axis is Vertical Figure 5 __ Varimax Actuator is energized __ Magnet Axis is Vertical Varimax Actuator is de energized Magnet Axis is Vertical __ Model 33 in clockwise to open valve Actuator is de energized 36000 Series Control Ball 37000...

Страница 29: ... AP from Rotary Valves WARNING Before carrying out any work on the device power off the instrument or make sure that the device s location conditions for potentially explosive atmosphere permit the safe opening of the cover To remove the SVI II AP positioner from a rotary valve perform Steps 1 8 on page page 10 in reverse Mounting the SVI II AP on Reciprocating Valves This section describes the pr...

Страница 30: ... Valve Linkage Selection Table 3 on page 19 6 Thread the right hand lock nut and turnbuckle onto the right hand rod end approximately two turns Turnbuckle length is a function of actuator size Refer to Table 3 on page 19 7 Secure the magnet housing assembly including the lever and right hand rod end to the bracket using four M5 X 10 mm flat head screws 8 Attach the left hand threaded rod end to th...

Страница 31: ...cating Valve Mounting Hole and Turnbuckle Length Actuator Size Masoneilan Stroke Mounting Hole Lever Hole Turnbuckle Length 6 and 10 0 5 0 8 12 7 20 32 mm A A 1 25 31 75 mm 10 0 5 0 8 12 7 20 32 mm A A 1 25 31 75 mm 10 0 8 1 5 20 32 41 5 mm B B 1 25 31 75 mm 16 0 5 0 8 12 7 20 32 mm B A 2 90 73 66 mm 16 0 8 1 5 20 32 41 5 mm C B 2 90 73 66 mm 16 1 5 2 5 41 5 63 5 mm D C 2 90 73 66 mm ...

Страница 32: ...for potentially explosive atmosphere permit the safe opening of the cover To remove the SVI II AP positioner from a reciprocating valve perform Steps 1 12 on pages page 13 page 14 in reverse 23 0 5 0 8 12 7 20 32 mm B A 5 25 133 35 mm 23 0 8 1 5 20 32 41 5 mm C B 5 25 133 35 mm 23 1 5 2 5 41 5 63 5 mm D C 5 25 133 35 mm Table 3 Reciprocating Valve Mounting Hole and Turnbuckle Length Continued Actu...

Страница 33: ...osed position 2 Mount the kit mount assembly to the yoke Figure 12 using helical spring washer 5 16 flat washer 5 16 and hex screw 5 16 18x44 5 1 75 LG Figure 12 84 85 86 Valve NOTE Mount all components snug enough to stay in place but loose enough to tap with rubber hammer into final position 3 Set rod ends and brackets to stroke and size of actuator The default setting is a 4 00 stroke Other str...

Страница 34: ...C x 22 2 88 LG Figure 14 Bracket Configuration Strokes 5 2 50 and 3 6 5 Ensure the turnbuckle assembly is parallel to the stem and the magnets are in the valve closed position Figure 15 and connect to take off bracket Figure 15 Magnet Position with Valve Closed 6 Verify lever is in correct position with valve closed Adjust rod ends if necessary Figure 16 Lever Alignment 7 Mount the SVI II with M6 ...

Страница 35: ...g device The SVI II AP Remote Position Sensor is suitable for installation indoors and outdoors in an industrial environment Mounting kits are provided to permit mounting on a variety of valves WARNING Do not remove the instrument cover or connect to an electrical circuit in a Hazardous Area unless the power is disconnected WARNING q Comply with current national and local regulations for electrica...

Страница 36: ... lever to the RMS output shaft a For reciprocating mounting Slip the feedback lever onto the RMS output shaft and thread the M5 set screw into the hole Be sure to align the setscrew hole of the feedback lever with the flat of the RMS output shaft such that the setscrew contacts the flat Next connect the take off rod to the split clamp of the actuator stem Finally connect one end of the turnbuckle ...

Страница 37: ...sition Sensor Wiring 7 Connect the cable s shielding drain wire to the unlabeled terminal 8 Screw on the RMS cover and replace the M8 cover retention screw Table 5 Remote Position Sensor Turnbuckle Length Actuator Size Stroke Turnbuckle Length 6 and 10 0 5 0 8 12 7 20 32 mm 1 25 31 75 mm 10 0 5 0 8 12 7 20 32 mm 1 25 31 75 mm 10 0 8 1 5 20 32 41 5 mm 1 25 31 75 mm 16 0 5 0 8 12 7 20 32 mm 2 90 73 ...

Страница 38: ...emote Position Sensor Cover Removed and Wiring Step 1 Connect Drain Wire to Open Terminal Step 2 When connecting cable to Remote Position Sensor make sure wire colors match Red to Red Brown to Brown Black to Black Step 3 Insert Ferrules into Remote Mount connector according to Wire Color Red Brown Black 1 2 3 Positive Signal Ground the chart at the right Remote Mount Connector Remote Position Sens...

Страница 39: ...h the SVI II AP for this purpose First you must install the software tool SMARTS Assistant from the CD and then using the tool configure the SVI II AP You can also download SMARTS Assistant from the Masoneilan web site www masoneilan com downloads To install SMARTS Assistant see Figure 19 1 From the CD click on Install Software The CD displays other available software tools 2 Click on Install SMAR...

Страница 40: ...ition Sensor is connected connects the device to the software and device information appears Figure 20 3 Select the Options tab and the screen appears Figure 20 4 Select the Remote PO checkbox 5 Activate the Remote Position Sensor by clicking Change Options SMARTS Assistant changes control to the Remote Position Sensor and the message appears 6 Click OK to continue Figure 20 SMARTS Assistant Commi...

Страница 41: ... the actuator and output pressure port two II for the other side of the actuator 4 Air supply q Supply pressure for single acting SVI II AP 20 100 psi 1 4 6 9 bar 138 690 kPa q Supply pressure for double acting SVI II AP 25 150 psi 1 73 10 4 bar 0 1035 kPa q Minimum tubing diameter 1 4 6mmx4mm NOTE The SVI II AP Digital Positioner is designed to operate with clean dry oil free instrument grade air...

Страница 42: ... the front supply is toward the back Two pressure gauges output on top supply on bottom are located on the front of the pneumatic block Maximum allowable air supply pressure to the SVI II AP varies according to actuator valve size and valve type See Pressure Drop tables in valve specification sheets to determine the correct positioner supply pressure Minimum supply pressure should be 5 psi to 10 p...

Страница 43: ...ition of the actuator The Action ATO or ATC is applied with respect to Output 1 When Output 1 is connected to deliver air to extend the actuator the action is ATC on a down seating valve 1 Connect Output 1 labeled I to the inlet port of the actuator and Output 2 labeled II to the opposing actuator port see Figure 22 2 Connect air supply and actuator outputs 1 4 NPT Supply pressure is 25 150 psi 1 ...

Страница 44: ...ology is reversed for an up seating valve Connecting the Air Supply After the tubing is installed use the following procedure to connect the air supply 1 Use a supply of clean dry compressed air to the filter regulator 2 Turn on the air supply 3 Adjust the filter regulator 4 Supply pressure must be 5 psi 10 psi 345 bar 69 bar 34 485 68 97 kPa greater than the spring range of the actuator but may n...

Страница 45: ...tion A shielded cable is recommended To communicate using HART 1 Connect one end of the cable to the control loop s 4 20 mA output 2 Remove the threaded wiring covers on the positioner 3 Connect the other end of the cable to the SVI II AP There are two threaded openings on the positioner Use the opening with the red plastic insert 4 Maintain polarity and respectively Verify Wiring and Connections ...

Страница 46: ...SVI II AP input 7 If 20 mA is not attainable see troubleshooting NOTE Improperly or inadequately grounded installations can cause noise or instability in the control loop The internal electronic components are isolated from ground Grounding the case is unnecessary for functional purposes but grounding the case may be necessary to conform to local codes Wiring Considerations For a detailed descript...

Страница 47: ... case is a magnetic field there are no seals or bearings to wear or corrode The rotation of the magnet is linked to the valve position by the mounting hardware provided For a rotary control valve the magnet assembly is normally attached directly to the actuator shaft For a reciprocating control valve the mounting kit includes the magnet assembly mounted in a sealed bearing with a lever that must b...

Страница 48: ...procedures are listed below q Inspect the Actuator Linkages or Rotary Adapter q Verify the Mounting and Linkage Adjustment q Check the Magnet q Check the Air Supply q Check the Electronic Module Connections q Valve Mounting q The Air Supply Actuator Linkages or Rotary Adapter Verify that the mounting has not been damaged in shipment for a pre mounted SVI II AP physically inspect the actuator linka...

Страница 49: ...gnet assembly must be aligned as shown in Figure 23 on page 37 For rotary valves or for actuators with rotations greater than 60 the magnet assembly must be aligned as shown in Figure 24 on page 38 NOTE For a reciprocating valve it is not necessary to remove the positioner to visually inspect the magnet setting and linkage of a reciprocating valve For reciprocating valves the adjustable link turnb...

Страница 50: ... A F T 6 8 1 0 Dresser Masoneilan Figure 24 Magnet Orientation for 90 Valve Rotation with De energized Actuator Figure 25 Magnet Holder for Reciprocating Valves Magnet Axis with Valve Closed Increasing Signal CCW Rotation 45 Disk Washer ...

Страница 51: ...1000 and 1000 when a reciprocating or less than 60 rotation rotary valve is closed 3 The Raw Position Value should be between 1000 and 1000 when a greater than 60 rotation rotary valve is at 45 of rotation mid stroke for a 90 rotation rotary valve Checking the Air Supply Use this procedure to check the air supply 1 Turn on the air supply 2 Adjust the filter regulator 3 Supply pressure must be a mi...

Страница 52: ...ed The SVI II AP terminal board has terminal blocks with cage clamp connectors Not all options are available for every model Refer to Table 8 for available functionality 1 Confirm that all applicable connections to the electronics module connectors are correct Table 8 SVI II AP Models and Functionality Available Functionality Positioner Model Number SVI II AP 2 SVI II AP 3 4 20 mA Input Setpoint D...

Страница 53: ... 08 mm2 1 If the wires have not been stripped strip approximately 1 4 in 6 35 mm of the insulation at the end of wires 2 Locate the correct terminal block on the terminal board see Figure 27 on page 41 3 Push back the lever at the top connector until you see the opening for wire insertion The connectors are spring activated and may require a lot of pressure to move the lever 4 Insert the wire into...

Страница 54: ...ore applying the electrical input signal Powering Up the SVI II AP WARNING This process can cause the valve to move Before proceeding be sure the valve is isolated from the process Keep hands clear from moving parts NOTE When an SVI II AP is turned on it is advisable to apply the air supply before applying the electrical input signal CAUTION Use of a low impedance voltage source damages the SVI II...

Страница 55: ...tton Locks and Configuration Lock Jumper Before performing any of these functions with the local display you must first ensure that the pushbuttons are placed in the unlocked mode using ValVue Lite The positioner ships in the unlocked mode See ValVue documentation for more details The SVI II AP offers several levels of plant security It may be desirable after initial setup to lock the pushbuttons ...

Страница 56: ... in Figure 27 on page 41 When set to the secure position by shorting the two pin header configuration and calibration are not possible using the local interface or any HART communication tool Pushbuttons ValVue and HHC 375 are locked out except to examine configuration calibration and position This is similar to Security Level 1 shown in the Pushbutton Lock Security Level table ...

Страница 57: ...est digital interface is the local pushbutton and display option mounted on the SVI II AP It is available at any time and provides immediate local access to most configuration calibration and fault messages It is approved for use in Explosion Proof and Intrinsically Safe installations in Hazardous Areas HART Handheld Communicator The HART handheld communicator is a universally available tool that ...

Страница 58: ...The display sequences from one variable to the next every 1 5 seconds Using the pushbuttons you can exit from operating mode at any time and step through a menu structure to perform a wide range of manual operation calibration configuration and monitoring functions that are described later in this section ValVue is used to perform all diagnostics functions The pushbuttons do not support diagnostic...

Страница 59: ...ermits you to move back through the menu structure to the previous item in the menu or decrement the value currently shown in the digital display When used to decrease a displayed value holding the button down causes the value to decrease at a faster rate q Right Button Marked permits you to move forward through the menu structure to the next item in the menu or to increment the value currently sh...

Страница 60: ...9 on page 49 through Figure 32 on page 56 When using these diagrams as a map you can move through the menus to the function you needed NOTE If the pushbuttons are pushed after being locked by ValVue software the message LOCKED appears Refer to the ValVue User s Guide for instruction about unlocking the pushbuttons The following pages display the menu structure for operating the SVI II AP using loc...

Страница 61: ...uding HART commands to position the valve When you switch to the VIEW DATA or VIEW ERR menus from the NORMAL operate mode menu the valve is still in NORMAL mode and still responds to the 4 20 mA signal Figure 29 NORMAL Operation and MANUAL Menu Structures NORMAL Cycling Menu NORMAL MANUAL VIEW DATA VIEW ERR CLR ERR MANUAL Mode Cycling Menu VIEW DATA Menu VIEW ERRors Menu Instant Action NORMAL MANU...

Страница 62: ...nu CONFIGuration Menu ATC Char act LINEAR EQ 30 1 EQ 50 1 EQ CAMFX QUICK50 CUSTOM PSI BAR KPA T S OFF T S ON ENGLISH FRENCH VALUE VALUE Menu Pressure Units Menu Tight Shutoff Menu Language Menu Air to Menu CONFIG CONFIG Char act Menu Language Menu Tight Shut off Menu Pressure Menu Units Displays tight shutoff value if turned on Press to change T S ON OFF status Press or to enter new value Press to...

Страница 63: ... is open it is ATC Valve Characteristics The positioner must be configured to supply the correct relationship between input signal and valve position This is called the position characteristic Figure 10 on page 52 lists configuring the positioner characteristics Use of a linear characteristic is recommended unless the process dynamics or control valve application calls for an alternate characteris...

Страница 64: ...osition reaches the TS value SVI II AP applies maximum actuator force The TS function has 0 5 deadband to prevent chatter If TS is set ON at 2 for example then the valve begins to open when the setpoint reaches 2 5 Configuring TS ON 1 Press to turn TS ON 2 Press to increase TS 3 Press to decrease TS 4 Press when finished to return to the CONFIG menu The CONFIG menu displays TS ON Turning TS OFF 1 ...

Страница 65: ... PERCENTAGE TRIM Linear Not Recommended Ball Valve with typical MODIFIED PERCENTAGE TRIM Equal Percentage LINEAR Butterfly valve with typical MODIFIED PERCENTAGE TRIM Linear Not Recommended Butterfly valve with typical MODIFIED PERCENTAGE TRIM Equal Percentage LINEAR Reciprocating valve with LINEAR TRIM Linear LINEAR Reciprocating valve with LINEAR TRIM Equal Percentage EQUAL50 Rotary or Reciproca...

Страница 66: ...st run the find STOPS calibration again Figure 31 CALIBration Menu SETUP CALIBration Menu STOPS RUNNING STOP OP TUNE FAILURE STEP 1 3 STEP 2 3 CALIB VALUE VALUE SIG LOW VALUE VALUE STEP 3 3 If there is a calibration tuning error FAILURE appears Press briefly and automatically return to the start of TUNE FAILURE If there is a calibration stops error FAILURE appears Press briefly and automatically r...

Страница 67: ...e is locked in position The parameters viewable by pressing and are q SINGLE or DOUBLE q ATO or ATC q LINEAR EQ 30 1 EQ 50 1 EQ CAMFX QUICK50 or CUSTOM q PSI BAR KPA q T S ON T S OFF q SIGNAL LOW value typically 4 00 q SIGNAL HI value typically 20 00 Viewing Configuration and Calibration Parameters To view configuration and calibration parameters use the following procedure 1 If in the NORMAL oper...

Страница 68: ...er Masoneilan Figure 32 VIEW DATA Menu SINGLE OR DOUBLE PRESSURE UNITS T S ON OR T S OFF SIG HIGH VIEW DATA ACTUATOR TYPE VALVE CHARACTERISTICS LINEAR EQ 30 1 EQ 50 1 EQ CAMFX QUICK 50 CUSTOM PSI BAR KPA TIGHT SHUTOFF ACTION TYPE SIG LOW ATO or ATC VIEW ERR ...

Страница 69: ...rs 1 Press to move to VIEW ERR 2 Press to view the first error message Press to scroll through all the fault messages in turn 3 Correct the cause of the problem and press to move to CLR ERR 4 Press to remove all error messages from memory 5 Move to the MANUAL menu If you have cleared the errors RESET no longer appears or 1 Press to move to VIEW ERR 2 Press to view the first error message Press to ...

Страница 70: ...ows you to read the current status information To clear the error messages 1 Press at CLR ERR on either the MANUAL or NORMAL mode menus 2 Exiting from the VIEW ERR menu returns the previous menu RESET FAILSAFE Menu FAILSAFE CLR ERR VIEW ERR MANUAL MODE MANUAL CYCLING MENU Instant Action Pressing displays the first error pressing a second time displays the second error Keep pressing to see all erro...

Страница 71: ...P pressure is below 0 8 psi 05 bar 5 5 kPa Warning Mechanical or pneumatic problem POS ERR The position error exceeds configured limit for more than configured time Warning after T1 and Failsafe Pneumatic mechanical configuration loose magnet KEYBOARD LCD Button Failure Warning Damaged buttons or LCD electronics MARGN PWR Input signal is insufficient to proceed CALIB ERR Calibrate failed Warning I...

Страница 72: ...Cs Failsafe RAM ERR RAM data item had a bad checksum Warning FLASH ERR Flash memory failed checksum test Failsafe Flash memory failed checksum test STACK ERR A valid hidden record in RAM existing upon reset indicating that a stack overflow had occurred Warning FCTRYMOD E Factory mode failure Failsafe NVM ERR T An FRAM record and its copy both have CRC errors Warning REF VOLT Temperature compensate...

Страница 73: ... and messages that appear on the display The table also explains the meaning of each message and a possible cause of the fault PRES3 ER Temperature compensated pressure sensor 3 reading is outside the range or supply pressure recorded is 120 psi 8 28 bar 828 kPa Warning PRES4 ER Temperature compensated pressure sensor 4 reading is outside the range or pilot pressure recorded is 120 psi 8 28 bar 82...

Страница 74: ... For communication to a HART device there is a Device Description Language A Device Description DD is published by registration with the HART Communication Foundation When the DD is installed in a host communication device then the host can readily access all the information in the smart field device The SVI II AP registered DD will be available from HART Communication Foundation when it next publ...

Страница 75: ...AP is shipped with a free version of ValVue Lite that is ready to use without registration Please refer to the ValVue Instruction manual included on the ValVue CD ROM Installation of ValVue Software and Registration For assistance contact the nearest Masoneilan Dresser Sales Office your local Masoneilan representative or email svisupport masoneilan com Visit our web page at http www masoneilan com...

Страница 76: ...ppropriate cables Install the ValVue software in the PC in accordance with the instructions on the CD ROM jacket After installation select ValVue from the program group and double click to begin See Figure 34 which shows the screen for setting the ValVue options Be sure to set the COM port to the serial output connection attached to your PC modem Checking the Allow Multidrop option as shown slows ...

Страница 77: ...s isolated from the process Keep hands clear from moving parts All configuration and calibration procedures are described using an SVI II AP with pushbuttons and display and ValVue software ValVue Software The SVI II AP is shipped with a free version of ValVue Lite and a trial version of ValVue ValVue Lite ValVue Lite software is shipped with each SVI II AP for positioner calibration and configura...

Страница 78: ...s an upgrade Pushbuttons and Local Display for Configuration and Calibration The pushbuttons and local display are thoroughly described in Using the Digital Interfaces Pushbuttons and Local Display on page 46 of this manual Pushbuttons Summary The local pushbuttons are located behind a hinged cover directly below the display window To open the cover loosen the screw and swing the cover down Always...

Страница 79: ...ion calibration and position This is similar to Security Level 1 shown in the Pushbutton Lock Security Level table Configuration with Pushbutton Display Prior to changing the SVI II AP configuration check the existing configuration Verify that the mounting has not been damaged in shipment for a premounted SVI II AP Record the following information for the configuration checkout q Valve Air to Open...

Страница 80: ...hen the adjustment screen appears stroke the valve open by holding down Notice that the rate of set point change is slow to begin but increases speed while the is pressed 9 Stroke the valve to several values 10 Verify the action is as desired 11 Press to exit MAN POS mode 12 Press to move to the SETUP menu 13 In the SETUP menu press the button to access the CONFIGuration menu 14 In the CONFIG menu...

Страница 81: ...alibration VIEW DATA Settings Table 13 VIEW DATA Settings Typical Setting Optional Setting SINGLE DOUBLE ATO ATC LINEAR EQ 30 1 EQ 50 1 EQ CAMFX QUICK 50 CUSTOM PSI BAR KPA 0 00 TS OFF 2 00 TS ON 4 00 SIG LO 4 00 SIG LO 20 00 SIG HI 12 00 SIG HI ENGLISH FRENCH ...

Страница 82: ...ir to Menu CONFIG CONFIG Charact Menu Language Menu Tight Shut off Menu Pressure Menu Units Displays tight shutoff value if turned on Press to change T S ON OFF status Press or to enter new value Press to accept new value and proceed to next menu item Select display language Select display units for pressure Select Air To Open ATO or Air To Close ATC Must match the actuator exactly Turn tight shut...

Страница 83: ...tive mode either MANUAL or NORMAL operating mode q If in NORMAL mode the display alternates between POS and SIGNAL indicating Normal mode q If in MANUAL the display alternates between POS M and SIG indicating MANUAL mode 2 With MANUAL mode displayed press to select the MANUAL mode 3 Press any key to enter MANUAL menu 4 Press to display SETUP 5 Press to enter SETUP mode 6 In SETUP mode press again ...

Страница 84: ...N DO NOT perform Auto Tune while the valve is controlling the process Correct for Over Travel WARNING During Calibration and Configuration the valve moves Keep hands clear Isolate the valve from the process Calibration functions stroke the valve over it s full range On some valves the full travel is larger than the nominal travel of the valve and it may be desirable to have the reported 100 positi...

Страница 85: ...ed value is q Correct press to advance to the next item q Not correct press to display value of SIG HI 5 Use and buttons to change the value 6 Press to return to menu and move to next item SIG HI must be between 10 0 and 20 2 mA SIG HI must be larger than SIG LO by at least 5 mA Calibration of the positioner is now complete 7 At MAN press to return to the MANUAL mode MAN POS appears NOTE SIG HI an...

Страница 86: ...OW VALUE VALUE STEP 3 3 If there is a calibration tuning error FAILURE displays Press briefly and automatically return to the start of TUNE FAILURE If there is a calibration stops error FAILURE displays Press briefly and automatically return to the start of STOPS SIG HIGH VALUE VALUE CALIB CAUTION These functions stroke the valve over its full range Do not perform while the valve is controlling th...

Страница 87: ...ory and used for point to point wiring checkout Connect the HART Handheld Communicator HHC to the SVI II AP as shown in Figure 37 Refer to the Product Manual for the HART Communicator included with the HHC375 or other HART communication devices Figure 37 SVI II AP HART Communicator Connections Be sure that the configuration lock jumper is in the unlock position When the jumper is in the lock posit...

Страница 88: ...us 5 Press YES 6 Change to MANual mode 7 Scroll to line 6 EXAMINE press 8 Scroll down to 5 read status 9 Read message 10 Press OK 11 Repeat OK to read all messages until the display returns to read status 12 Scroll down to 6 clear status press 13 If clear fault codes not completed appears press OK and read the message Position Error for example or go to the troubleshooting guide 14 Correct the pro...

Страница 89: ...q Run AutoTUNE q View Calibration Parameters q View Diagnostics q Read and Clear Status q Return to NORMAL mode NOTE Setting the input current span is unnecessary except for applications such as split range Calibration of the input current sensor requires the use of high accuracy current standards The factory settings should only be changed if a calibration laboratory detects errors Never connect ...

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Страница 91: ... The electrical characteristics of a current loop sending a signal to the field device are different from the apparently similar loop bring a signal to a controller from a transmitter in the field The positioner receives its power from the current signal It receives its control setpoint from the value of the current and it must be able to communicate bi directionally by superimposing signal tones ...

Страница 92: ...lectrical installation work q Comply with national and local explosive atmosphere regulations q Before carrying out any work on the device power off the instrument or make sure that the locale conditions for potentially explosive atmosphere permit the safe opening of the cover Wiring Guidelines This list contains eight guidelines for a successful implementation of DC current signal DC power and HA...

Страница 93: ...s area that is protected by Intrinsically Safe wiring practices The SVI II AP requires an electrical input from a 4 20 mA current source The SVI II AP input signal can carry a HART communication protocol signal from ValVue software and a HART modem or from a HART Hand Held Communicator Since the process control system the source of the input signal is located in a non hazardous location setup requ...

Страница 94: ...82 D R A F T 6 8 1 0 Dresser Masoneilan Figure 38 General Purpose and Explosion Proof Installation Hazardous Area Non Hazardous Area Power Supply 220 Ohms HART compliant control system output card HART Modem SVI II AP HHC375 ValVue ...

Страница 95: ...VI II AP Setups Wiring an SVI II AP Figure 39 Intrinsically Safe Installation Power Supply 220 Ohms HART Compliant Control System Output Card HART Modem SVI II AP HHC375 ValVue Barrier Resistance Single Channel Zener Barrier ...

Страница 96: ...mA Typical smart devices require MORE Voltage at higher current The controller supplying the current has LESS Voltage available at higher current The SVI II AP is unique in that it requires LESS Voltage at higher current which compliments the characteristic of the source requiring only 9 Volts at 20 mA NOTE Improperly or inadequately grounded installations can cause noise or instability in the con...

Страница 97: ...ound terminals are provided for use if grounding is required NOTE When an intrinsic safety barrier separates the SVI II AP from the modem or HHC a HART compliant barrier must be used See Chapter Six for details Table 15 Compliance Voltage for Galvanic Isolator with 22 AWG Cable Voltage at SVI II AP at 20 mA 9 0 V Drop in 22 AWG cable 3000 ft long 30 ohms per 1000 feet 1 8 V Required voltage at Iso...

Страница 98: ...s impedance be at least 220 Ohms at the tone signaling frequencies HART compliant current sources are supplied with the correct Impedance Versus Frequency Characteristic In Non Compliant Current Sources there may be a noise reduction capacitor across the output that lowers the impedance at higher frequencies and thus lowers the signaling voltage To be certain that at least 220 Ohms of impedance is...

Страница 99: ...ations Foundations specifies cable capacitance requirements to preserve signal strength Refer to the standards for detailed calculation methods CAUTION Do not connect a HART modem and a PC to a control circuit unless the controller is HART compatible or has a HART filter Loss of control or a process upset can occur if the controller output circuit is not compatible with HART signals HART Filter Re...

Страница 100: ...ideration of the compliance voltage The SVI II AP requires at least 9 0 Volts Two SVI II AP in series requires at least 18 0 Volts in addition to the voltage drops in wiring and other series devices Typical controller output current sources rarely deliver 24 Volts so the system can become voltage starved It is possible to boost the compliance voltage of the DCS using a series wired voltage source ...

Страница 101: ...d to all three devices on a single current loop Do not use 0 for any of the positioners A 0 may cause HART masters to stop searching for additional positioners Both the ValVue software or the HART Communicator 375 can be used to set non zero addresses ValVue must be configured to allow multidrop mode by selecting the Set Options function in the Tools menu on the Select Device screen as shown in Fi...

Страница 102: ...tidrop box as shown in Figure 41 If unchecked ValVue looks for devices only at polling address 0 When in multidrop mode even if a device is found at polling address 0 other polling addresses are searched DCS systems offer multiple independent analog outputs driven by the same control signal to solve the voltage problem with split ranged positioners Use of such systems is recommended for split rang...

Страница 103: ...be connected in series to a single controller output and each of them can drive a positioner Isolators are used to provide compliance voltage and isolation even in installations not requiring intrinsic safety An example of an isolator can be obtained from R Stahl Model 9318 16 22 10 Consult the manufacturer for detailed installation instructions The HART loop address of each device must be set to ...

Страница 104: ... 0 Dresser Masoneilan Figure 42 Split Range with Isolator HART Filter HART Modem ValVue Control System Output Card Power Supply Power Supply Hazardous Area Non Hazardous Area HART Address 1 HART Address 2 I S Galvanic Isolator I S Galvanic Isolator ...

Страница 105: ...14 mA Use the following procedure to ensure that the SVI II AP split range system is properly powered q Connect a DC voltmeter across the input terminals q For an input current value between 4 and 20 mA the voltage varies between 11 V and 9 V respective q Current is read from the local display or with a milliammeter installed in series the SVI II AP q When voltage exceeds 11 V check that polarity ...

Страница 106: ...nd cable glands according to local codes The unused conduit entry is plugged with a NPT pipe plug Thread engagement must comply with local electrical codes The cover must always be secured before application of power Do not connect a HART communication device in the hazardous area Use of the SVI II AP local display with pushbuttons is recommended when Explosion Proof methods are in effect HART Fil...

Страница 107: ... countries Explosion Proof means both Flameproof and Intrinsically Safe Recommended Practice for Severe or Humid Environments The circuitry of SVI II AP is encapsulated for protection from corrosive atmospheres To prevent moisture from damaging the electronics of the SVI II AP use a sealed junction box in high humidity or tropical environments The wiring from the junction box to the SVI II AP is s...

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Страница 109: ...ires special training For additional information consult MTL Instruments PLC Measurement Technology Limited www mtl inst com or R Stahl Inc www rstahl com All installations must comply with plant standards and local and international electrical codes There are three basic barrier types q Single channel zener diode barriers q Dual channel zener diode barriers q Active galvanic isolators To determin...

Страница 110: ...s and active galvanic isolators are offered with HART compliance Consult the manufacturer or refer to the documents listed at the end of this instruction manual Figure 44 Intrinsically Safe Installation with Zener Barrier and HART Filter Power Supply HART Compliant Control System Output Card HART Modem SVI II AP HHC375 ValVue Barrier Resistance Single Channel Zener Barrier Hazardous Area Non hazar...

Страница 111: ...ance voltage The galvanic isolator must be certified by the manufacturer to be HART compliant if the HART connections are supported on the safe area side of the isolator See Figure 44 on page 98 Consult barrier and isolator manufacturer for devices rated for use with the SVI II AP positioner I S entity parameters in Hazardous Area Approvals HART Filter Requirements The control system output interf...

Страница 112: ...ontrol or a process upset can occur if the controller output circuit is not compatible with HART signals NOTE A control circuit must be HART compatible or have a HART filter installed Contact the manufacturer of the controller or DCS See HART Filter Required for Certain Controls System Output Circuits Power Supply Hart Compliant Control System Output Card HART Modem SVI II AP HHC375 ValVue I S Gal...

Страница 113: ...ual with jurisdiction outside the European Union for intrinsic safety The product can be used outside the European Union e g in the USA on the sole authority of the buyer MACTek makes no claims of suitability and offers no warranties regarding the use of this product for connection of PCs to circuits extending into hazardous areas in countries outside the European Union Do not connect a PC or HART...

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Страница 115: ...between the position setpoint and position feedback is interpreted by the position control algorithm This is used to compute a new output pressure This output pressure is amplified by a pneumatic relay that drives the actuator When the valve position agrees with the value called for by the position setpoint input signal the system stabilizes with no further movement of the actuator Figure 46 Block...

Страница 116: ...ived from the measurement sensors The base module has no user repairable components Magnetic Position Sensor A non contact sensor uses a magnetic field to transfer the position through the wall of the housing without penetration to sense the valve position A Hall effect device sealed within the electronics housing senses the rotation of a magnetic assembly mounted on the end of a rotary valve shaf...

Страница 117: ...e terminal then the switch will conduct Polarity reversal will not damage the switch but the switch will appear to be always ON There must be a series load in the circuit to prevent damage to the switch If the switch is connected directly across the power source the current will be limited only by the capacity of the power source and the switch will be damaged NOTE A 1 Amp 24 Volt power source del...

Страница 118: ... position 5 Position Low Limit the switch is activated whenever the valve position is less than the position setting of this switch control 6 Position Upper Limit the switch is activated whenever the valve position is greater than the position setting of this switch control 7 Manual Mode the switch is activated whenever the SVI II AP is in manual mode configure mode calibrate mode or diagnostic mo...

Страница 119: ... I P and increases airflow as required for stable responsive actuator performance The single acting relay operates on any supply pressure that is at least 5 psi 345 bar 34 5 kPa above the required actuator pressure up to 100 psi 6 9 bar 690 kPa Figure 47 Pneumatic Module with Single Acting Relay Vent Relay I P Current to Pneumatic Converter Pneumatic Amplifier ...

Страница 120: ...at least 5 psi 345 bar 34 5 kPa above the required actuator pressure up to 150 psi 10 35 bar 1035 kPa The two output pressures may be balanced by means of an adjustable seat assembly The average of the two pressures is adjusted to equal 70 of the supply pressure The double acting relay is rated for supply pressure to 150 psi 10 35 bar 1035 kPa Figure 48 Double Acting Pneumatic Relay I P Current to...

Страница 121: ...tructure see Using the Digital Interfaces on page 45 The switches are operated in a hazardous environment without compromising the flameproof enclosure SVI II AP Maintenance and Repair The SVI II AP was designed based on a modular concept All components are interchangeable allowing for easy quick component swapping The only maintenance procedures recommended for the SVI II AP are q Remove and inst...

Страница 122: ... have an SVI II AP with a solid cover and would like to replace the solid cover with a display cover follow the instructions below for removal and installation Removing the SVI II AP Display Cover To remove the SVI II AP Display cover 1 Using a 5 mm Hex key unscrew the four screws around the perimeter of the SVI II AP cover 2 Lift the cover off the positioner Figure 49 SVI II AP Display and Pneuma...

Страница 123: ...I AP housing 3 Connect the cable from the display into the LCD connector on the terminal board 4 Ensure that the gasket is in its groove in the housing 5 Place the cover over the screw mounts 6 Tighten the four screws with the 5 mm hex key 7 After installing the new display power up the unit refer to Powering Up the SVI II AP on page 42 NOTE The cover of the SVI II AP is a critical component for s...

Страница 124: ... screws from around the perimeter of the cover 2 Lift the cover off and put aside for installation I P Module Removal To remove I P module 1 Disconnect the I P wire from the terminal board 2 Using a 3 mm hex key remove the four screws from around the perimeter of the I P module 3 Lift the module off the positioner I P Module Installation To install I P module 1 Place the module in the designated a...

Страница 125: ...und the perimeter of the relay Make sure that 1 The five O rings are seated in the base of the relay and are not damaged 2 The three mounting screws are tight and torque to 15 in lb 1 7 N m NOTE When you have completed maintenance on the pneumatic relay it is necessary to reinstall the pneumatic cover Refer to on Pneumatic Cover Installation on page 113 Adjusting I P Zero The I P Zero is calibrate...

Страница 126: ... errors continue for a preset time When the SVI II AP goes into FAILSAFE the valve is driven to its Failsafe position It remains in that position until a technician clears the cause of the error and resets the instrument Reset is performed in two ways q Connect a HART modem and ValVue and then click on the RESET button or q Turn the power off and on To prevent the valve from moving after reset put...

Страница 127: ...nstructions to save the old configuration Follow the detailed instructions included with the software update To check the firmware version cycle the power off then on to perform a cold start The display shows software version in upper right corner When maintenance is complete reinstall the positioner and perform the checkout procedure detailed in Installation and Set Up on page 7 Consult the facto...

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Страница 129: ...0 C 95 Relative Humidity Insulation Resistance Greater than 10 G Ohms at 50 RH MTBF 49 years based on MIL handbook calculation for electronic parts and field data on mechanical parts Electromagnetic Compatibility Electrostatic Electrostatic discharge No effect with contact discharge level of 4 kV and air discharge level of 8 kV IEC 1000 4 2 Radio frequency interference Less than 0 2 at 10 volts pe...

Страница 130: ...alve position control parameters In addition to P I D the position algorithm uses damping symmetry for exhaust and fill time constants dead zone and magnitude characterization parameters Auto Tune is optimized for 5 step changes with negligible overshoot After the Auto Tune process is completed You can further adjust the positioner tuning parameters to more conservative or to more responsive value...

Страница 131: ... revision 5 Local Display Liquid Crystal optional LCD explosion proof with two lines of nine alpha numeric characters Push Buttons External Three Explosion Proof Flameproof push buttons Table 21 Construction Material Specifications Housing and Cover Aluminum ASTM B85 SC84B standard Stainless Steel optional Weight Standard 7 4 lbs 3 357 kg Stainless Steel 16 lbs 7 257 kg Relay and Manifold Single A...

Страница 132: ...ngle Acting Standard Flow Air Supply Dry oil free 5 micron filtered air See ISA S7 3 Action Direct Acting Supply Pressure 20 150 psi max 1 4 10 bar Regulate 5 10 psi 345 bar 69 bar above actuator spring range Do not exceed actuator rating Air Delivery Single Acting Relay 10 0 scfm 280 l m at 30 psi 2 1 bar supply 16 6 scfm 470 l m at 60 psi 4 2 bar supply 23 3 scfm 660 l m at 90 psi 6 3 bar supply...

Страница 133: ...20 psi 8 4 bar supply Air Consumption for Double Acting 0 4 scfm 11 3 l m at 30 psi 2 1 bar supply 0 85 scfm 22 6 l m at 80 psi 5 52 bar supply Air Supply Failure Positioner cannot control the failure position of an actuator without a spring The actuator can under different conditions fail in place fail open or fail close In cases where the valve must fail to a required position additional control...

Страница 134: ... 2 Double Acting c Pneumatics 1 Standard flow d Display 1 2 3 4 1 No Display or Pushbuttons 2 With Display and Pushbuttons 3 No Display or Pushbuttons Marine 4 With Display and Pushbuttons Marine e Hardware Version 3 3 f Communications 1 1 4 to 20 mA HART Communications g Option Board 1 2 1 None 2 Position Retransmit h Agency Approvals 1 4 1 ATEX FM CSA Intrinsic Safety Exprf 4 FM CSA ATEX IEC App...

Страница 135: ...D R A F T 6 8 1 0 123 Spare Parts Spare Parts ...

Страница 136: ...SVI II AP Instruction Manual 124 D R A F T 6 8 1 0 Dresser Masoneilan ...

Страница 137: ...D R A F T 6 8 1 0 125 Spare Parts ...

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Страница 139: ...al actuators The scales are chosen to emphasize the relationships between input current and actuator pressure so that the failsafe valve position is shown at the lower left of each graph Note that for an ATC valve 4 mA represents 100 valve travel not the expected 0 The controller and other human machine interfaces must correctly show that the valve is open 100 at 4 mA and closed 0 at 20 The graph ...

Страница 140: ...SVI II AP Instruction Manual 128 D R A F T 6 8 1 0 Dresser Masoneilan Figure 51 ATO and ATC Action with Linear Positioner Characteristics ...

Страница 141: ...D R A F T 6 8 1 0 129 Actuator Action Figure 52 ATO and ATC Action in Percentage of Positioner Characteristics ...

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Страница 143: ... the fuel flow is shut off if air fails Additional process precautions can be taken When the air supply recovers the setpoint to the valve must be at a value that continues to hold the valve in its safe condition or to move it to a known safe condition To do so put the control system sending the control valve position setpoint into manual mode and set to 0 After the air supply has stabilized at it...

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Страница 145: ...he connected valve The auto tune feature has robust tuning parameters designed to tolerate variations in process characteristics You can adjust the speed of response of the control valve by adjusting parameters in SVI II AP Tuning parameters are adjusted by ValVue the preferred method or by the HHC 375 See the ValVue Instruction Manual for details ...

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Страница 147: ...tuator force to eliminate damaging leakage At a position setpoint of 2 for example this function allows full thrust to occur when the input signal is less than 2 This solves a common cause of valve repair Do not use tight shutoff if it is necessary to throttle the valve at very small flows Tight Shutoff Application to High Pressure Liquid Letdown Valve Trim When staged trim is used in High Pressur...

Страница 148: ... of a bellows seal or packing Total travel can also be used to estimate the remaining life of packings and seals Critical Service Cavitation Control Trim The time near closed of a valve with severe service when near the seat can be monitored by ValVue and saved to permanent files to monitor and predict maintenance needs You can use ValVue to specify the criterion for time spent near closed a valve...

Страница 149: ...e test moves the valve between several points selected by you and graphically presents the dynamic response for each step The Positioner Signature test strokes the valve over a travel specified by you and records a signature for comparison with the as built and with future tests to predict maintenance intervals The full version of ValVue is required for diagnostic tests ...

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Страница 151: ... is type of actuator A device of type Actuator can not be connected to a circuit intended for a device of type Transmitter Algorithm An algorithm is a procedure or formula for solving a problem There are sev eral algorithms entailed in SVI II AP operation The SVI II AP has a position control algorithm that is a modified PID Other algorithms embedded in SVI II AP include the STOPS method for calibr...

Страница 152: ... AP and all the resistive devices in series with it Conformity The closeness to which the position approaches the theoretical position curve for example equal percentage or quick opening It is independent of effects due to valve or actuator rigidity at the mechanical limits of travel See Accuracy Compliance HART Manufactured and tested in accordance with the HART Commu nications Foundation standar...

Страница 153: ...ng when it has pressure applied to both sides of the piston A positioner is factory assembled and cali brated as a double acting that has two pressure outputs one that increases and one that decreases with increasing position set point The SVI II AP positioner can be single acting or double act ing EEPROM An Electrically Erasable Programmable Read Only Memory SVI II AP has two memories that are us...

Страница 154: ...able to be communicated tomorrow a smart field instrument The HART protocol communi cates without interrupting the 4 20mA signal and allows a host application master to get two or more digital updates per second from a field device As the digital FSK signal is phase continuous there is no interference with the 4 20mA signal HART Communication The HART Communication Foundation is an independent non...

Страница 155: ...Protocol that allows many smart field devices to draw power from and to communi cate over a single pair of wires Though most suited to multiple measurement devices it can be used with SVI II AP to permit dig ital communication of setpoint as well as configuration data to multiple positioners or a combination of positioners and measure ment transmitters Such communication may not be fast enough for...

Страница 156: ...provide the same limits through software control of position Positioner Tuning The positioner requires six integer parameters to determine the Parameters response of the positioner to a setpoint change Internally the positioner uses an improved PID control algorithm to control the valve s position Tuning Parameters P P is a dimensionless gain factor related to the proportioning action of the algor...

Страница 157: ...nge of actuation pressure and to supply and vent at high flow rates for responsive control Safe Area The area of a plant where there never is an explosion hazard present such as the control room or a wire marshalling rack area Sig Hi In the SVI II AP configuration the input current setting at which the valve is fully open ATO or fully closed ATC Sig Lo In the SVI II AP configuration the input curr...

Страница 158: ...ble parameter A dead band is applied to pre vent cycling in and out of this behavior ValVue Lite The Masoneilan software for calibration and configuration that is provided with every SVI II AP ValVue The full featured Masoneilan software for diagnostics calibration and configuration of SVI II AP VDE VDI 3845 A Standard common in Europe for mounting positioners and accessories on rotary valve actua...

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