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DPI 530 User Manual

1. EL ek ER Ioa Bre JE ME 162 Issue No 2 2 3 2 Note 2 3 3 2 3 4 DPI 530 User Manual Set up Decimal Point Position Set the decimal point position by selecting the switches on the rear panel to on as shown below All other switches in the 1 to 4 group should be set to OFF Switch Position Display 4 On 1 9999 3 On 19 999 2 On 199 99 1 On 1999 9 Enable Remote Control For local control from the front panel potentiometer or span divider keys set switch 7 to ON and switch 8 to OFF For remote control from either an external voltage or current source set switch 8 to ON and switch 7 to OFF Power Supply Connections A C power is supplied to the instrument through a captive power supply cable Figure 2 1 shows the cable and the related power supply fuse Connect the power supply cable to the power supply as follows Brown Live L Blue Neutral N Green Yellow Ground Protective Earth For U S Versions Black Live L White Neutral N Green Ground Protective Earth D It is recommended that a power supply isolator is fitted between the power supply and the instrument K162 Issue No 2 DPI 530 User Manual 9 2 3 5 Note Only one type of remote input can be used at a time Switch on the a c power supply and check that the instrument s display comes on If the instrument s display does not come on isolate the power supply and check the powe
2. The use of a Class A compensated deadweight tester is recommended The following procedures should be carried out in a controlled environment by qualified personnel If the accuracy of the instrument is not within the specification carry out a calibration adjustment procedure A qualified person must have attended a product training course given by the manufacturer or appointed agent and successfully completed the training course on this equipment D The manufacturer offers a comprehensive and if reguired UKAS accredited calibration service Calibration Check A calibration check should be carried out at chosen intervals The readings of the instrument should be compared with a pressure standard and after any adjustments for accuracy traced to National Standards the differences recorded The adjusted differences can then be compared with the required accuracy for the instrument If necessary a calibration adjustment can be carried out The recommended procedure is to check at increasing and then decreasing intervals of 0 20 40 60 80 and 100 of full scale K162 Issue No 2 26 DPI 530 User Manual 4 1 Accuracy Check If the accuracy or stability of the instrument is suspect the following accuracy and temperature performance checks can be carried out Equipment o Pressure standard with less than 0 025 FS non linearity and non repeatability Environment o The procedure must be carried out at ambient pressure and
3. Druck DPI 530 Sub Rack Pneumatic Pressure Controller User Manual K162 K162 Issue No 2 DPI 530 User Manual i Safety o The manufacturer has designed this instrument to be safe when operated using the procedures detailed in this manual Do not use this instrument for any other purpose than that stated Do not apply values greater than the maximum value stated o This manual contains operating and safety instructions that must be followed for safe operation and to maintain the instrument in a safe condition The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage Use qualified personnel and good engineering practice for all procedures in this manual Pressure Do not apply pressure greater the maximum safe working pressure to the instrument Electrical Safety This instrument is designed to be safe when using options and accessories supplied by the manufacturer Toxic Materials There are no known toxic materials used in this instrument Maintenance The instrument must be maintained using the manufacturer s procedures and should be carried out by authorised service agents or the manufacturer s service departments Technical Advice For technical advice contact the manufacturer or subsidiary refer to section 5 5 A qualified person must have attended a product training course given by the manufacturer or appointed agent and successfully comp
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5. Units of Pressure Measurement Potentiometers K162 Issue No 2 DPI 530 User Manual 1 1 Introduction The DPI 530 instrument is a fast response closed loop pneumatic pressure controller It is contained in a Euro sub rack module that can be mounted in a 3U high sub rack A push switch on the front panel enables the instrument to operate in either the pressure measure mode or pressure control mode Pressure is sensed by a transducer containing a silicon strain gauge diaphragm with electronic thermal compensation and linearization One of five units of pressure measurement or percentage of full scale can be selected by switches on the rear panel of the instrument A seven segment LCD display shows in the measure mode the pressure value and in the control mode the set point value In the pressure control mode the set point can be set by a centrally located ten turn potentiometer or by six independent preset span divider keys The preset value of each span divider is adjusted by individual potentiometers Each span divider has full control from the lowest calibrated pressure to the span value The controller uses pulse width modulation to operate solenoid valves in an analogue control loop Remote control can be selected by switches on the rear panel The instrument can be remotely controlled by an analogue input signal of either 0 to 10 V d c or 0 to 20 mA d c A pressure outlet port connection is locate
6. at temperature of between 18 to 423 Procedure 1 Connect the pressure standard to the outlet connector fit a blank the outlet connection not in use 2 Select measure mode and switch the instrument on Wait 1 hour 3 Adjust the pressure standard to zero pressure check the display shows zero pressure If necessary turn the zero adjuster to show zero 4 Adjust the pressure standard to a pressure of 5096 FS and record the display reading 5 Adjust the pressure standard to a pressure of 100 FS and record the display reading 6 Adjust the pressure standard to a pressure of 0 FS and record the display reading 7 The maximum error for the recorded readings is 0 1 FS If the error is more than the maximum value carry out a pressure calibration adjustment K162 Issue No 2 DPI 530 User Manual 27 Measurement unit full scale potentiometer HELL IL ILI ff Remote input potentiometers Voltage and current Span divider potentiometer RV13 to RV19 Figure 4 1 Access for Adjustments K162 Issue No 2 28 DPI 530 User Manual 4 2 Pressure Calibration Adjustment To carry out this procedure the instrument must be dismantled to access the potentiometers on the PCB Equipment o Pressure standard of less than 0 025 FS non linearity and non repeatability Dismantling Figure 4 1 1 Remove the instrument from its installed position 2 Unscrew and remove th
7. 2 Operation Description This instrument operates in two modes measure and control A push switch on the front panel switches between the two modes An LED indicates green for measure mode and red for control mode A further push switch on the front panel switches between the span divider and the set point adjuster Measure Mode In the measure mode the transducer senses the pressure at the outlet port and displays the resulting pressure reading The controller remains switched off and disabled in measure mode Control Mode In the control mode the instrument s controller changes the pressure to the value selected by either the span divider or set point adjuster When the controller reaches the set point the Ready LED illuminates In the remote control mode an input voltage of 0 to 10 V or 0 to 20 mA controls the pressure A varying voltage or current may be used to replace the set point signal from the set point adjuster or span divider controls When enabled on the rear panel the voltage or current can be used to change the set point over the full scale of the instrument including negative pressures to 1 bar K162 Issue No 2 20 DPI 530 User Manual Functional Description Figure 3 1 The instrument s controller uses pneumatic valves to control the flow pressure of the gas from a source pressure The valves are energised by a pulse width modulated signal A transducer mounted on the manifold measures the press
8. E ese reeset Aan ian 0 to 20 mA 100Q sense Display sein nahan gann 7 segment LCD Kl 19999 FESOIUTIOM enda OE OE EE Better than 0 005 FS Electromagnetic compatibility This instrument complies with European EMC directive and meets EN 50081 1 emissions TR EE cians EN 50082 1 immunity Environmental Temperature Operating ER EE EE OE 0 to 50 C Storage 20 to 70 C Ingress protection eterne tpe tt EER GEE GE Re GEE kke front panel to IP40 Dimensions niii AG Ee kemanan 130 mm x 120 mm x 190 mm 3U sub rack 24 HP wide Weight raia 2 kg K162 Issue No 2 4 DPI 530 User Manual blank page K162 Issue No 2 DPI 530 User Manual 5 2 N 2 1 2 2 Installation Installation must be carried out by suitably qualified installation personnel Mounting This instrument is a 3U high Euro sub rack unit designed to be mounted in a Euro Sub rack Source Outlet Connections Figure 2 1 The common front and rear pressure outlet ports should have a blanking plug fitted when not in use All other the connections to the instrument are on the rear panel Figure 2 1 shows the rear panel pressure and electrical connections Allow enough cabling and piping for the instrument to be pulled out from the sub rack for access to the connections Electrical Connections Figure 2 1 Before connecting the instrument make sure the DIP switches a
9. d current input 3 Set the power source to approximately 20 mA and record the actual input current reading 4 Calculate the following Instrument reading input current x FS 20 mA 5 If necessary adjust potentiometer RV21 for this value 6 Switch the instrument off K162 Issue No 2 DPI 530 User Manual 33 Example FS 350 mbar input current 19 986 mA Adjust instrument reading to 19 986 x 350 mbar 349 8 mbar 20 mA 4 3 2 Voltage Input Figure 4 2 Preparation 1 Set SW3 7 to open and SW3 8 to closed 2 Connect the power source to pin 1 to ve and pin 3 to ve Procedure 1 Switch the instrument on 2 Select control mode 3 Set the power source to approximately 10 V and record the DVM reading 4 Calculate the following Instrument reading DVM reading x FS 10V 5 If necessary adjust potentiometer RV20 for this value 6 Switch the instrument off Example FS 350 mbar applied voltage 9 978 V Adjust instrument reading to 9 978 x 350 mbar 349 2 mbar 10 V Reassemble the instrument as detailed in the section 4 4 K162 Issue No 2 34 DPI 530 User Manual 4 4 Re assembly Figure 4 1 1 Carefully locate the PCB in the front panel and secure with the two countersunk screws 2 Locatethe top and bottom panels in the grooves ofthe side panels and then locate the rear panel 3 Secure the rear panel to the assembled instrument with the four screws 4 After completion carry
10. d on both the front and rear panels all other connections are on the rear panel K162 Issue No 2 2 DPI 530 User Manual 1 1 Specification Hange eH Ania id en una 1 to 20 bar Accuracy EE RE EE AE 0 1 FS Temperature effects combined zero and span shifts of lt 0 5 FS over 0 50 C Stability EE OE ae aa 0 025976 rdg per 90 days Controller Stabilify 4 5 kenanga HAGA REG Reede eg lt 0 01 FS Maximum Safe Working Pressure Woo 2xFS Pneumatic Supply clean dry non corrosive gas SOUCO ol TR OE EE eat 110 to 140 FS vent pressure at least 5 FS less than the lowest controlled pressure Pneumatic Connection Outlet eae ER Ee REEN Ee We ee ie front and rear panel G1 8 female Reference EE E rear panel M5 female Source rear panel G1 8 female Vent rear panel G1 8 female Five selectable units of pressure measurement and percentage of full scale bar psi kg cm kPa inHg 0 100 FS Electrical Safety meets EN61010 1 as applicable The instrument must be connected to power supply with a protective earth ground conductor Power supply Kee AN EE AR EI AE Ie 88 to 130 or 205 to 260 V set at manufacture Power consumption ooocoWo oom 15 VA reld ie RE aman EE AE ioca seri n ET Pelan 45 to 65 Hz K162 Issue No 2 DPI 530 User Manual 3 Remote control ei Te EE aa 0 to 10 V input impedance gt 500 kQ Current sr SE
11. e two countersunk screws from the right hand side of the front panel 3 Unscrew and remove the four screws securing the rear panel 4 Carefully position the dismantled instrument to access the potentiometers on the PCB Procedure Figure 4 2 1 Connect the pressure standard to an outlet connection Fit a blank to the other outlet connection 2 Apply electrical power to the instrument Wait at least 1 hour for the instrument to stabilise 3 Select measure mode and set the instrument to read bar see section 2 3 4 Adjust the pressure standard to zero pressure 5 If necessary adjust potentiometer RV9 for a reading of zero 3 counts on the display 6 Adjust the pressure standard to 80 of full scale pressure 7 If necessary adjust potentiometer RV3 for a reading of 80 FS K162 Issue No 2 30 DPI 530 User Manual 8 Maintain the applied pressure at 80 FS and if necessary adjust each unit of pressure measurement potentiometer as follows o Set the switch SW to the next unit of pressure measurement o Adjust the appropriate potentiometer detailed in Figure 4 3 and shown in Figure 4 4 o Reset the switch SW to unit 1 and if necessary adjust potentiometer RV3 for a reading of 8096 FS 9 Adjust the pressure standard to zero pressure 10 Adjust the pressure standard in 20 increments up to 10096 FS and record the display reading at each pressure 11 Repeat step 10 for 20 decrements to ze
12. for the required value K162 Issue No 2 24 DPI 530 User Manual 3 2 3 Remote Operation For remote operation the instrument correctly configured using the rear panel switches refer to the installation section for details Control signal required 0 10V or 0 20mA 0 100 FS 0 100 FS Connect the outlet to the system as reguired turn the source pressure on Press the mode switch to select control mode and set the remote control signal to zero Switch the instrument on and check the LED illuminates red and the Ready LED illuminates Check the display reads zero Set the remote control signal to the required level and check the Ready LED extinguishes and the displayed pressure reading changes When the controller reaches the set point the Ready LED illuminates 3 2 4 Controller Performance fill rate There are many factors affecting the rate that the controller changes pressure to the new set point The differential pressure across the valve the size of pipes in the system and volume of the system are all factors A typical time to set point would be For controller volume only 2 seconds Zero to full scale o For controller and 1 5 litre volume 45 seconds zero to full scale K162 Issue No 2 DPI 530 User Manual 25 4 Calibration The instrument is supplied with a calibration certificate For the instrument to stay accurate it is recommended that the instrument is checked every 12 months
13. in the section 4 4 K162 Issue No 2 38 DPI 530 User Manual 5 4 Cleaning Clean the instrument case with a damp lint free cloth and mild detergent K162 Issue No 2 DPI 530 User Manual 5 5 Approved Service Agents 39 The following are approved agents for the servicing of Druck instruments FRANCE Druck SA 19 rue Maurice Pellerin 92600 Asnieres FRANCE Tel 1 43 34 24 75 Fax 1 43 34 86 08 GERMANY Druck Messtechnik GmbH Auf dem Hohenstein 7 61231 Bad Nauheim GERMANY Tel 6032 93300 Fax 6032 933080 HOLLAND Druck Nederland B V Postbus 232 Zuideinde 37 2991 LJ Barendrecht The Nederlands Tel 01806 11555 Fax 01806 18131 ITALY Druck Italia Srl Via Magenta 77 edificio 5 20017 Rho Milano ITALY Tel 00 02 932061 Fax 00 02 93206299 JAPAN Japan Druck Japan KK Medie Corp Building 8 2 4 14 Kichijyoji Honcho Musashino Tokyo 180 JAPAN Tel 81 422 20 7123 Fax 81 422 20 7155 UK Druck Limited Fir Tree Lane Groby Leicester LE6 OFH England UNITED KINGDOM Tel 0116 231 7100 Fax 0116 231 7103 USA Druck Incorporated 4 Dunham Drive New Fairfield Connecticut 06812 USA Tel 203 746 0400 Fax 203 746 2494 K162 Issue No 2
14. leted the training course on this equipment K162 Issue No 2 ii DPI 530 User Manual Abbreviations and Symbols The following abbreviations are used in this manual Note Abbreviations are the same in the singular and plural DVM digital voltmeter FS full scale IEC International Electrical Council inHg inch of mercury kg cm kilogram per centimetre squared kPa kilo Pascal LCD liquid crystal display mA milli Ampere mm milli metre psi pound per square inch V Volt VA Volt amp Symbols Hazard a warning highlighting a danger that would result AN in injury Also a marking on the instrument referring the user to this publication D Protective conductor terminal This product meets the essential protection requirements of the relevant EEC directives Further details of applied standards may be found in the product specification K162 Issue No 2 DPI 530 User Manual iii Contents Section page 1 Introduction 1 1 Specification ea na Ana N IG 2 2 Installation 5 2 1 Mounting ai D 2 2 Source Outlet Connections sen 5 2 3 Electrical CGonnectons seen 2 4 Pressure Connections or 2 5 Fitting into Euro Rack 2 8 Applications AE ES tiec iren AA ana 3 Operati
15. on EE EN 19 SA DesctiptioDi ic OE N 19 3 2 Controlling a Pressure Woco Wo ooooWoW momo 23 4 io ie EE abaya 4 1 Accuracy Check s 4 2 Pressure Calibration Adjustment see 28 4 3 Remote Voltage and Current Set point Calibration Adjustment 32 4 4 Assembly EE 34 5 Maintenance 35 5 1 Fault Finding a 5 2 Controller AdjustMent seeeeseeeeieeieieiniereinrieisiriersriersnnes 35 5 3 keak Check EE EE 37 5 4 Cleaning 5 5 Approved Service Agents 39 K162 Issue No 2 iv DPI 530 User Manual Illustrations Figure page 2 1 Rear Panel Connections 2 2 Ready Output 2 3 Eufo Sub Rack Filtirig 2 maan aan Applications 2A Measure or Control Mode 2B Apply Fixed Set points sisiraan 2C V to Porlto P Conversion 2D Automatic Pressure Cycling se 2E Pressure Switch Test Cycling oooooomoomoWoWomo 17 2F Remote Controller with Ready Signal Interface 18 3 1 Schematic Diagram es iocus bet reve dtes etti 21 3 2 Front Panel RE EE AA nieto 22 4 1 Access for Adjustments 4 2 Printed Circuit Board 4 3 Units of Pressure Measurement and Switch Positions es 4 4
16. out an accuracy check section 4 1 and a leak check section 5 3 K162 Issue No 2 29 DPI 530 User Manual uit boa Figure 4 2 Printed circ K162 Issue No 2 DPI 530 User Manual 35 5 5 1 5 2 Maintenance There is no routine maintenance on this instrument Fault Finding Carry out the following general fault location routines in Table 5 1 Controller Adjustment This procedure should only be carried out after a leak check section 5 3 and when the instrument s outlet pressure becomes unstable or there is too much noise or unusual noise from the controller valves The instrument must be disassembled as described in the calibration procedure Equipment o o Digital voltmeter DVM 0 05 FS accuracy Source pressure 120 FS Preparation 1 2 3 Turn the set point adjuster to the fully counter clockwise position Select the instrument to measure mode Make sure that there is no pressure at the outlet connections and fit blanks to both connections Connect the DVM ve to TP VSUM and ve to OV Connect source pressure and the power supply Procedure Figure 4 2 1 Switch the instrument on and turn potentiometer RV17 to the fully counter clockwise position Select to position 8 links LK1 and LK3 Carefully adjust potentiometer RV12 for a DVM reading of OV 0 1V In this system there is high gain with a slow time constant Check that the Ready LED comes on K162 Issue
17. r supply fuse Remote Input To set remote control proceed as follows Remove the remote connector from the instrument and connect up the remote supply 1 as shown below Ensure that remote control is enabled refer to Section 2 3 4 Insert the remote connector 1 into the remote socket Voltage Use V ve and OV Current Use ve and OV K162 Issue No 2 10 DPI 530 User Manual 2 3 6 Ready Output Figure 2 2 The ready output connection on the rear panel is an optically isolated open collector transistor It can be used in control systems to carry a maximum of 30 V at 100 mA e g to energize an external relay or indicator Example V 30 V 100 mA Max External lt lt 452 I I 2 7 Ready signal I i ve OV DPI 530 Figure 2 2 Ready Output Connect the ready output by pushing the two pin connector 1 into the rear panel socket K162 Issue No 2 DPI 530 User Manual 11 2 4 A 1 2 4 1 Pressure Connections WARNINGS BEFORE CONNECTING DISCONNECTING PRESSURE COUPLINGS RELEASE THE PRESSURE AND VENT THE PIPES ONLY USE CORRECTLY RATED PRESSURE PIPES AND FITTINGS Procedure Figure 2 1 Make sure that the supply source complies with the specification Make sure the supply pressure is isolated from the supply source pipe It is recommended that an isolation valve and a 40 micron filter are fitted between the supply pressure and the inst
18. re set on the rear panel for D Units of measurement D Decimal point position on the display D Local or remote operation WARNINGS VOLTAGES IN EXCESS OF 30 V RMS A C OR 50 V D C CAN IN CERTAIN CIRCUMSTANCES BE LETHAL CARE MUST BE TAKEN WHEN WORKING ON LIVE EXPOSED CONDUCTORS ISOLATE THE POWER SUPPLY BEFORE CONNECTING THE INSTRUMENT ISOLATE THE POWER SUPPLY BEFORE REMOVING THE INSTRUMENT COVERS K162 Issue No 2 6 DPI 530 User Manual OE Ma De Figure 2 1 Rear Panel Connections K162 Issue No 2 DPI 530 User Manual 7 CAUTIONS 1 USE THE CORRECT POWER SUPPLY SETTINGS OPERATING VOLTAGE RANGES ARE MARKED ON THE REAR PANEL OF THE INSTRUMENT AND DETAILED IN THE SPECIFICATION 2 THE EARTH GROUND CABLE COLOURED GREEN YELLOW MUST BE CONNECTED TO THE POWER SUPPLY SAFETY EARTH GROUND 2 3 1 Setting the Pressure Measurement Units Set the required pressure measurement units by selecting the applicable DIP switches on the rear panel Note All other switches in the group 1 6 should be set to OFF left If necessary change the front panel label to show the new units of pressure measurement This illustration shows bar selected Switch Pressure Position Unit 1 On bar for instruments lt 1bar 1 On mbar for instruments gt 1 bar 2 On psi 3 On kg cm 4 On kPa 7 5 On inHg 6 On 0 to 100 F S ali A Lew OR es E gt pmo ror
19. riable set point outlet to user system outlet front or rear panel Figure 2A Measure or Control Mode Druck DPI 530 S m source adjusters Control fixed set points span dividers variable set point outlet to user system Figure 2B Apply Fixed Set points span dividers K162 Issue No 2 DPI 530 User Manual 15 d reference D EP Druck DPI 530 zx Co source sm aw Control outlet to user system Figure 2C V to P 0 to P Conversion K162 Issue No 2 16 DPI 530 User Manual E Druck DPI 530 H e Source A 3 2 Control Outlet outlet to user system 0 10V Figure 2D Automatic Pressure Cycling K162 Issue No 2 DPI 530 User Manual 17 Control Source outlet pressure switch 0 10V t Figure 2E Pressure Switch Test Cycling K162 Issue No 2 18 DPI 530 User Manual E Druck DPI 530 FEE Source Outlet User system interface pressure input Em mm Control Figure 2F Remote Controller with Ready Signal Interface K162 Issue No 2 DPI 530 User Manual 19 3 3 1 3 1 1 3 1
20. ro pressure 12 The difference between the recorded pressure values and the applied pressures must not be more than 0 1 8 13 If the readings are still not within tolerance the transducer must be replaced 14 Reset the switch SW 3 to the units of pressure measurement required for normal operation 15 Reassemble the instrument as detailed in section 4 4 K162 Issue No 2 DPI 530 User Manual 31 Units Switch SW3 Potentiometer bar Sw3 1 RV3 psi Sw3 2 RV4 RV5 RV6 inHg Sw3 5 RV7 0 to 100 Sw3 6 RV8 Figure 4 3 Units of pressure measurement and switch positions RV7 RVe RV5 RV4 RV3 Rvel Figure 4 4 Units of pressure measurement potentiometers K162 Issue No 2 32 DPI 530 User Manual 4 3 Remote Voltage and Current Set point Calibration Adjustment The following adjustments can only be carried out with the instrument dismantled Equipment o Digital voltmeter 0 05 FS accuracy o Variable voltage source maximum 10 V o Variable current source maximum 20 mA 4 3 1 Current Input Figure 4 2 Preparation 1 Select control mode 2 Set SW3 7 to open and SW3 8 to closed 3 Connect the remote source current to the remote connector pins 1 and 2 Procedure 1 Switch the instrument on 2 With zero current flow set on the power source check the instrument display shows 0 counts 2 counts If necessary adjust potentiometer RV22 for this setting Note This adjustment is for voltage an
21. rument as shown below External oS Connect the supply pressure to the source port fitting a bonded seal between the pressure union and the port All ports use a G 1 8 thread except the reference port M5 Make sure that each coupling is tight Fit the outlet pipe to either the front or rear outlet port using a bonded seal Fit a blanking plug and bonded seal to the unused port K162 Issue No 2 12 DPI 530 User Manual 2 5 Fitting into Euro Rack Figure 2 3 When connected slide the instrument into the Euro rack and secure in position with the four captive fixing screws 1 Figure 2 3 Euro Sub Rack Fitting K162 Issue No 2 DPI 530 User Manual 13 2 6 Applications The DPI 530 instrument can be used in many ways for carrying out tests and supplying regulated pressure to external systems Table 2 1 below lists some application examples and the following figures show the instrument configuration Table 2 1 Application Figure No Measure or Control Mode 2A Apply fixed Set points span dividers 2B Voltage or Current to Pressure Conversion 2C Automatic Pressure Cycling 2D Pressure Switch Test Cycling 2E Remote Controller with Ready Signal Interface 2F K162 Issue No 2 DPI 530 User Manual 14 reference b E Druck DPI 530 FEE Source 0 va
22. seun le ye pereuiun G3T Apeey smous Aeldsia Wm 162 Issue No 2 DPI 530 User Manual 37 5 3 10 11 Ov de 0 m c Select to position A links LK1 and LK3 Turn the set point adjuster to the fully clockwise position Check that the Ready LED goes off Turn the set point adjuster to the fully counter clockwise position Check that the Ready LED comes on Select control mode and carefully turn RV17 clockwise Stop when the control valves start to resonate Slowly turn the set point adjuster to 5096 FS checking that the controller does not become unstable If instability occurs carefully turn RV17 counter clockwise and then slowly increase the set point to 9096 FS Select in turn the preset span divider keys and check at each selection that the controller remains stable Leak Check Switch the instrument on select control mode and set point of 5096 FS Select measure mode and the record the pressure reading Wait 30 seconds Record the pressure reading If the difference between the two readings is more than 0 5 FS minute there is a leak To locate the leak separate the system from the instrument Fit blanking plugs to both outlet ports and repeat steps 1 to 6 If there is a system leak carry out the appropriate procedures to rectify the leak If the leak is in the instrument return the instrument to the manufacturer or agent Assemble the instrument as detailed
23. tput of the instrument and can set a level between 0 and 100 full scale The span divider keys can be set to select a controlled output of between 1 and 100 of the current set point Each span divider key can be individually preset by a corresponding potentiometer of the current set point between 1 and 100 Setting an Output Pressure To set up an output pressure proceed as follows 3 2 2 Switch the power supply on and check the LED illuminates green Press the set point span divider selector to select set point adjuster Turn the set point adjuster fully counter clockwise Connect the pressure output port to the system as required and turn the source pressure ON Press the mode switch to select control mode Check that the display reads zero Turn the set point adjuster to the required value the Ready LED extinguishes When the controller reaches the set point the Ready LED illuminates Use of Span Divider Keys After setting an output pressure the set point can be divided into preset steps by using the span divide keys as follows Press the set point span selector switch to select span divider keys Press the required span divider key when the controller reaches the new set point the Ready LED illuminates If necessary use the span adjuster potentiometer to adjust for the required value To set other span divider ratios press the required key If necessary use the appropriate span adjuster potentiometer to adjust
24. ure and produces a feedback signal proportional to the outlet pressure The error amplifier compares this signal with the set point signal to produce a bipolar error signal proportional to the difference The control conditioner buffers the error signal to drive the PWM which in turn drives the pneumatic valves to change the output pressure towards the set point As the outlet pressure changes towards the set point the transducer output changes and the error signal decreases until the system balances at the set point When the system balances a ready signal illuminates the Ready LED The ready signal also supplies an opto isolated open collector NPN transistor that can be used to supply an external solenoid or relay K162 Issue No 2 21 DPI 530 User Manual Apeay inding eiouuey 666666 OD indui ajowal JO A Aejdsig Ae dsiq 18AUP BALA quiod jas JEUOI IPUOD ee WMd Nd 3ON343J34 aSeajaH uf A31LNO Addy I ADYNOS Figure 3 1 Schematic Diagram K162 Issue No 2 22 DPI 530 User Manual span 1g Oruck D 530 2 er display ready indicator span divider adjustment set point span divider selector measure control indicator set point adjuster Figure 3 2 Front Panel K162 Issue No 2 DPI 530 User Manual 23 3 2 3 2 1 Controlling a Pressure Figure 3 2 The set point adjuster controls the ou

DPI 530 User Manual

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