LDX-3A - OMEGA Engineering
Contents
1. Omega com CTOMEGA RANSDUCER Com eu ER Shop online at omega com CEOMEGA omega com e mail info omega com L DX 3A For latest product manuals omegamanual info 1509001 1509002 QUALITY USA ISO 9001 Certified Canada omega com CEOMEGA OMEGAnet On Line Service www omega com Internet e mail info omega com Servicing North America One Omega Drive Box 4047 Stamford CT 06907 0047 Tel 203 359 1660 e mail info omega com 976 Bergar Laval Quebec H7L 5A1 Canada Tel 514 856 6928 FAX 614 856 6886 e mail info omega ca Benelux FAX 203 359 7700 Czech Republic France For immediate technical or application assistance USA and Canada Sales Service 1 800 826 6342 1 800 TC OMEGA Mexico Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA Germany Austria En Espa ol 001 203 359 7803 e mail espanol omega com FAX 001 203 359 7807 info omega com mx United Kingdom ISO 9002 Certified It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification Servicing Europe Postbus 8034 1180 LA Amstelveen The Nethe2. LDZ 3A eaz 8 M 1633 0905 2 0 Safety Information CAUTION Electrostatic Discharge This eguipment is susceptible to ESD Electrostatic Discharge when being installed or adjusted or whenever the case cover is removed To prevent ESD related damage handle the conditioning electronics by its case and do not touch the connector pins During installation follow the guidelines below Ensure all power supplies are turned off If possible wear an ESD strap connected to ground If this is not possible discharge yourself by touching a metal part of the equipment into which the conditioning electronics is being installed Connect the transducer and power supplies with the power switched off Ensure any tools used are discharged by contacting them against a metal part of the equipment into which the conditioning electronics is being installed During setting up of the conditioning electronics make link configuration changes with the power supply turned off Avoid touching any other components Make the final gain and offset potentiometer adjustments with power applied using an appropriate potentiometer adjustment tool or a small insulated screwdriver CAUTION Fuse Rating The LDX 3A power supply unit does not need a fuse for safe operation However wiring to the LDX 3A power supply unit may need to be fused If the mains lead supplied with your LDX 3A has a fuse incorporated into the plug then a fuse of the same type and value
3. lt 0 01 FRO C emperature Coefficient Offset lt 0 01 FRO C Warm Up 5 minutes recommended inearity lt 0 1 FRO Bandwidth 3dB 00Hz typical Protection see note 6 Inputs and Outputs hort circuit protected ransient and ESD Protected Certification see note 7 mmunity S EN61000 6 2 2001 mmunity for Industrial Environments missions S EN61000 6 3 2001 Emission for Residential commercial and light industrial environments ower Supply Safety Approvals Overall Safety Approval See note 8 LDX 3A 23 M 1633 0905 7 0 Specifications continued 7 2 Mechanical and Connections Parameter Value Comments 120 x 65 x 40 mm excluding connectors See note 10 Weight 300g approximately Die cast Zine Aloy palmted Power Supply Size 65 x 49 x 33 mm Weight 120g approximately 7 3 Environmental Parameter Value Comments Operating Temperature Range 0 606 Storage Temperature Range 20 SET Kl IP Rating Pao SSCS SY LDX 3A SE 24 M 1633 0905 7 0 Specifications continued 7 4 Notes 1 o N Primary voltage absolute value and drift are not specified The LDX 3A uses ratiometric techniques to compensate for primary voltage drift The way in which the LDX 3A functions means a special configuration must be used for transducers outside of the standard range This is selectable by links The majority of Omega LVDT transducers are within the standard range The user manual provides details of the se
4. STEP 2 Align LDX 3A Null and Transducer Null Any electrical offset in the LDX 3A is removed The transducer position is adjusted so that transducer and LDX 3A nulls are aligned Null the LDX 3A 1 Put the Gain link on position 7 as shown This allows any electronics offset in the FREQ a output stage to be removed LO 2 2 Adjust the Fine Offset control to give as near to zero output as practical ON 1 2 3 4 5 6 7 AECA Null the transducer GIGIO 1 Replace the Gain link to the original position A 2 Adjust the position of the transducer to give as near to Zero output as practical O 1 This is the centre of the mechanical range If the transducer cannot be centered for practical reasons an offset will remain within the system There may be noticeable interaction between Gain and Offset adjustment This does not prevent the LDX 3A being set up however several iterations may be reguired when adjusting Gain and Offset Please contact your supplier if guidance is reguired LDX 3A EE KEE B M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued ___ 5 2 Basic Procedure STEP 3 Setting Bi Polar Full scale Output 1 Move the transducer to the position where maximum LDX 3A output is required 2 If the polarity of the output is wrong move the Polarity FR links to the R position see link diagram Normal Output Polarity Reverse Output Pola
5. information available BEFORE charges Have the following contacting OMEGA information available BEFORE 1 Purchase Order number under contacting OMEGA which the product was 1 Purchase Order number to cover PURCHASED the COST of the repair 2 Model and serial number of the 2 Model and serial number of the product under warranty and product and 3 Repair instructions and or 3 Repair instructions and or specific specific problems relative to the product problems relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 2004 OMEGA ENGINEERING INC All rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC M 1633 0905 Where Do I Find Everything I Need for Process Measurement and Control OMEGA Of Course Shop online at www omega com TEMPERATURE Panels amp Assemblies Q Wire Thermocouple RTD amp Thermistor 0 Calibrators amp Ice Point References Q Recorders Controllers amp Process Monitors LU Infrared Pyrometers PRESSURE STRAIN AND FORCE LI Transducers amp Strain Gauges 0 Load Cells amp Pressure Gauges Q Displac
6. half bridge transducers is generally lower than for LVDT types the x2 and x4 gain position may have to be used LDX 3A nm A M 1633 0905 7 0 Specifications 7 1 Electrical Specifications are for the LDX 3A only Effects due to transducers are not included Output is set to 10Vdc into a 1kQ load unless specified differently FRO means Full Range Output Fouer TT Tt AC Input Current 10 25 A 120 Vac 0 1 A 250 Vac ee Transducer Exefation dT Energising Frequency 2 5kHz Lo or 5kHz Hi nominal link selectable 10kHz Lo or 13kHz Hi Half Bridge version only Energising Curent pes SS S ransducer Signal Input Kee FER nput Signal Range Standard 6 gain ranges applies to LVDT only to 2500mV FR Special DIV2 2500 to 500mV FR see note 2 x2 150 to 400mV FR x4 55 to 150mV FR nput Load Resistance 2 10 10kQ link selectable Options Forward and Reverse link selectable LVDT Input standard Half Bridge Input special plug wiring or half bridge version only 22 M 1633 0905 7 0 Specifications continued 7 1 Electrical Parameter Parameter Comments ignal Output Output Voltage Range p to 10Vdc into 1kQ min see notes 3 and 4 Output Residual Noise lt 1 mV rms Output Current p to 20mA into 1509 load see note 5 Output Offset Coarse 5Vdc approx 10mA fixed link selectable 10Vdc approx 10mA fixed link selectable Fine 2 8Vdc approx 5 6mA Variable adds to fixed offsets emperature Coefficient Gain
7. less likely to pick up noise Process Monitor le d lout OV Vout IO Current Current Monitor The total loop resistance resistance of measuring equipment and wiring must not exceed specification Note The LDX 3A is not loop powered A power supply must not be used in line with the current output LDX 3A N E M 1633 0905 4 0 Installation continued 4 7 Using an EMC Cable Gland To ensure the cable screen is properly connected to the LDX 3A case an EMC cable gland should be used This is supplied as an extra The diagrams below assume a single 4 way cable is being used Remove the grommet and fit the cable gland as shown below 30 mm 10 15 mm Ee e S Se L A bis Et WA WAS 1 H e Rotate Gland Body s e a creen to Tighten e Case Wall Sealing Rolled Back Screen Prepare cable as shown Ring Slide the Dome nut sealing ring and plastic insert over cable Fold and roll the screen back over itself to form a lump Push cable into gland body followed by the plastic insert t ensure anti rotation slots engage sealing ring and Dome nut Ensure all components are properly seated before tightening Dome Plastic Gland the dome nut Nut Insert Body LDX 3A E M 1633 0905 5 0 Setting up the Transducer and LDX 3A The LDX 3A may be set up with output signals anywhere within a 10 Vdc or 20 mA range Typical outputs
8. 5 6 Operational Environment 7 Residential Commercial amp Light Industrial Environments 7 Industrial Environments 7 Electrical Connections 8 Connecting the Transducer 9 Mains Power Supply 10 Connecting the Signal Out 11 Voltage Connections 11 Section 4 6 2 4 7 5 0 5 1 5 2 5 3 6 0 7 0 7 1 7 2 7 3 7 4 Title Page Current Connections 12 Using an EMC Cable Gland 13 Setting up the Transducer and LDX 3A 14 Option Links Explained 15 Basic Procedure 16 Sensitivity and the X2 X4 DIV2 Links 20 Half Bridge Version 21 Specifications 22 Electrical si roca a 20 6 erek Ra a a 22 Mechanical and Connections 24 Environmental 24 NOES 3 44 Seo Ae Wee bad ao otal are 25 M 1633 0905 2 0 Safety Information Terms in this Manual WARNING statements identify conditions or practices that could result in personal injury or loss of life CAUTION statements identify conditions or practices that could result in damage to the eguipment or other property Symbols in this manual This symbol indicates where applicable cautionary or other information is to be found LDX 3A WARNINGS Do not operate in explosive atmosphere To avoid explosion do not operate this eguipment in an expl
9. COARSE LinkON Link PARKED Link OFF l Tl G BK W R B LDX 3A d M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued __ 5 2 Basic Procedure To set up the LDX 3A some basic steps should be followed The following steps describe a typical setting procedure and applies to most applications Other procedures may be used as appropriate Step 1 Step 2 Step 3 Step 4 Step 5 Set up LDX Align LDX 3A and Set LDX 3A and Add Offset Final Checks 3A links Transducer Null Transducer Range if Required V V Zero 5V Zero 5V ov 5V 10V Lo A SS j it b HV electronics lt electronics b oe h electronics D keng f I 1 a J ZA Hz gt Le l i eg ieee Es Jf 7 Re GE KO 4 transd ucer gt transducer b j transd ucer N Null Null p Null For a bi polar output i e 10 Vdc or 20 mA follow steps 1 to 3 For a uni polar output i e 0 10 V 0 20 mA or 4 20mA follow steps 1 to 4 In either case step 5 final checks should be followed on the completion of the set up LU D E M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued 5 2 Basic Procedure STEP 1 Set up LDX 3A Links If the transducer characteristics are known set the frequency and input resistance links as required If the transducer characteristics are not known the standard link settings should be used If your transducer is known to be outside of the standard sensitivity range the X2 or DIV2 links will have to be used See section 5 3
10. are 10 Vdc 5 Vdc 0 10 Vdc and 4 20 mA These procedures apply to voltage and current output Voltage and current output are available at the same time although they cannot be individually adjusted Either voltage or current should be chosen as the calibration reference All outputs use OV signal as the signal reference A list of standard link settings is available see section 5 2 k CAUTION During installation and adjustment the top of the enclosure has to be removed for access to user adjustments At this time standard ESD handling precautions for electronic equipment should be followed LDX 3A SE 8 M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued 5 1 Option Links Explained The table below and subsequent diagrams explain the link functions and show the factory setting ink Beseripion options Standard Setting Sets the basic gain 1 link on Positron 1 to 6 Link ON Position 1 bere been between course gain ranges Potentiometer Adjustment Mid Position Position Course Offset Shifts the output by a fixed amount Link ON VE or VE and Link ON 5V or 10V_ No ee Links Parked No offset Link Parked Fine Offset Fine trim around any fixed offset Potentiometer Adjustment Mid Position Position 7 Null Used during set up to null output ON OFF GE 8545 Bi d Sai o sie E a a a S O Je Ze 3 E SS p i SO au FINEGAIN og vE S OO 1v CH 7
11. ation with screened cables LU H m_a E 25 M 1633 0905 7 0 Specifications continued 7 4 Notes 8 The power supply unit alone is certified as described When used as part of the LDX 3A and installed as described in the user manual then compliance with IEC 61010 1 can be achieved 9 The LDX 3A itself has a 0 60 C specification The power supply will function over a wider temperature range but the safety approval is only valid for 0 50 C 10 The LDX 3A enclosure is smaller than the old model This means that it will fit into all existing applications Mounting holes may need to be re drilled Extra mounting bars are available for situations where this is not possible LDZ 3A E B M 1633 0905 WARRANTY DISCLAIMER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OMEGA s Warranty adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGA s customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to def
12. ects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESS OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or o
13. ement Transducers Q Instrumentation A Accessories FLOW LEVEL LI Rotameters Gas Mass Flowmeters amp Flow Computers Q Air Velocity Indicators LI Turbine Paddlewheel Systems Q Totalizers amp Batch Controllers pH CONDUCTIVITY Q pH Electrodes Testers amp Accessories UI Benchtop Laboratory Meters 0 Controllers Calibrators Simulators amp Pumps 0 Industrial pH amp Conductivity Equipment LDX 3A Q Thermocouple RTD A Thermistor Probes Connectors DATA ACQUISITION Data Acquisition amp Engineering Software Q Communications Based Acquisition Systems Q Plug in Cards for Apple IBM amp Compatibles QO Datalogging Systems Q Recorders Printers amp Plotters HEATERS LI Heating Cable Q Cartridge amp Strip Heaters 0 Immersion amp Band Heaters Flexible Heaters Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL Q Metering amp Control Instrumentation Q Refractometers QO Pumps amp Tubing LU Air Soil A Water Monitors Industrial Water A Wastewater Treatment Q pH Conductivity amp Dissolved Oxygen Instruments M 1633 0905
14. ld be connected to a local earth This can be achieved via the mounting bracket This earth connection is not a safety earth but is part of the overall electrical screening scheme The wiring layout arrangements are similar for LDX 3A fitted with EMC glands and screened cable E COARSE OFFSET SBS Wen LDX 3A c aa M 1633 0905 4 0 Installation continued 4 4 Connecting the Transducer Transducers fitted with a 5 pin DIN plug are simply screwed into the case mounted socket Transducers not fitted with a plug should be wired to the plug supplied For the half bridge only variant see section 6 0 Green Va LVDT Electrical Connections Blue OW Secondary Centre Tap i In Phase for Inward Red and White Displacement Transducer Body Ground CORE Centre Tap Red White Standard LVDT Gauging Probe Plug Connections Black Cable Screen Yellow e 1 Plug view into pins Note 1 indicates inward movement of the tip Note 2 The transducer body may be disconnected from the cable screen by cutting the black wire inside the connector LDX 3A Blue Half Bridge Electrical Connections o Centre Tap In Phase for Inward Red and Yellow Displacement Transducer Body Ground Red Standard Half Bridge Gauging Probe Plug Connections Black Cable Screen Yellow Plug view Case I into pins Note 1 indicates inward movement of the tip N
15. lection criteria LDX 3A can drive into a 1 kQ load but this offers no advantage 10 100 kQ is recommended Output voltage range can be adjusted as required anywhere within this range by using a combination of gain and offset for example 10Vdc 5Vdc 0 5Vdc 0 10Vdc 4 20mA See user manual for adjustment method Current output may be used at the same time as voltage output Calibration of voltage and current cannot be individually adjusted Protection applies to the product when fully installed according to the user manual During installation the top of the enclosure has to be removed for access to user adjustments At this time standard ESD handling precautions for electronic equipment should be followed The LDX 3A complies with the toughest electrical emissions regulations The power supply unit alone is only compliant with BS EN61000 6 1 2001 Immunity for residential commercial and light industrial environments However when used as part of the LDX 3A assembly the compliance levels are extended to BS EN61000 6 2 2001 Immunity for industrial environments Compliance requires installation according to user manual The flexibility of LDX 3A means it can be installed in a variety of ways according to user requirements Simple installations with short non screened cables will meet the lesser light industrial immunity regulations Heavy industrial installations especially with longer cables will need more careful install
16. ood performance in this environment Standard equipment wire such as 7 0 2 24AWG can be twisted together as required Standard data cable such as generic CAT5 UTP will also give good performance 4 2 2 Industrial Environments Typically this will be an industrial environment where there is equipment likely to produce high levels of electrical interference such as welders machine tools cutting and stamping machines Connections should be made using screened cable Braided or foil screened cables may be used The cable screen should be connected to the LDX 3A case at cable entry point The case of the LDX 3A should be connected to a local ground An EMC cable gland is recommended This is supplied with the LDX 3A When selecting the type or wire or cable to be used consider the following parameters Screening Conductor size resistance Mechanical aspects such as flexibility and robustness This is not a complete list Installations may require other special cable characteristics LU H m E M 1633 0905 4 0 Installation continued 4 3 Electrical Connections The LDX 3A requires three connections 1 Transducer 2 Mains power supply 3 Output signal voltage or current A small hole should be made in the grommet prior to passing the wires through If a screened cable is to be used an EMC cable gland is recommended For best performance in electrically noisy environments the case of the LDX 3A shou
17. osive atmosphere Installation Environment The power supply unit is for indoor use only It should not be mounted where ingress of fluids is possible Safety Critical Environments This eguipment is not intended for use in a safety critical environment Power Source Apply no more than 264VAC between mains supply pins and ground M 1633 0905 2 0 Safety Information Service Safety Safety Compliance Statement LDX 3A is designed as Safety Class 2 apparatus with functional ground to comply with IEC 61010 1 The power supply unit is marked as compliant with EN60950 1 but when as part of the LDX 3A assembly and installed by qualified personnel according to these user instructions then IEC 61010 1 compliance can be achieved This equipment has been designed and tested to meet the requirements of the Low Voltage Directive 73 23 EEC 1997 and has been supplied in a safe condition This manual contains information and warnings that must be followed by the user to ensure safe operation and to maintain the apparatus in a safe condition Notes Ground Connection This equipment is supplied with a mains ground connection This is a functional ground only Loss of ground connection may result in an AC voltage between accessible parts of the LDX 3A and reference earth The voltage current or charge is at a safe level The power supply unit contains no user serviceable parts This equipment must be returned to your dealer for all servicing and repair
18. ote 2 The transducer body may be disconnected from the cable screen by cutting the black wire inside the connector M 1633 0905 4 0 Installation continued 4 5 Mains Power Supply The mains adaptor is pre wired to the LDX 3A This is a universal power adaptor so no adjustments are reguired for mains freguency or voltage Please review safety statements and installation section en II N WARNING Ensure that the local safety precautions are observed for installation of mains eguipment LDX 3A ooo eu M 1633 0905 4 0 Installation continued 4 6 Connecting the Signal Out The output signal may be voltage or current 4 6 1 Voltage Connections Voltage is most easily be monitored using a variety of instrumentation such as voltmeters Voltage drops along wires contribute to measurement errors so care must be taken when using long cable lengths 100m for example High impedance instruments are more prone to interference Process Monitor lout OV je Vout Voltage Ze Z Voltage Monitor LDX 3A o ree M 1633 0905 4 0 Installation continued 4 6 2 Current Connections Current output reguires the use of purposely designed current input instrumentation Current output is more suitable for transmitting over longer distances because current is not lost due to wiring resistance Additionally with a low impedance a current loop is
19. rity a are OOO EECH OO CHOW OOO a Doe OC o S d S Spo eS K lt i mpi Rs IW N 3 Move the RANGE link between 1 and 6 until the LDX 3A output is near the required value 4 Adjust the Fine Gain control to give the required output 5 A bi polar output has now been set proceed to step 5 If a uni polar output is required proceed to step 4 Example 10Vdc is required from a 1mm transducer Set the transducer to the 1mm position and set the output to 10V If your transducer is known to be outside of the standard sensitivity range the X2 or DIV2 links will have to be used See section 5 3 LDX 3A E M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued 5 2 Basic Procedure STEP 4 Setting Uni polar Full Scale Output adding an offset 1 Move the transducer to the null position LDX 3A output will be OV or OmA 2 Apply offset using the VE VE 5V and 10V links and then adjust the Fine Offset control to set the offset precisely 3 Perform final checks step 5 Example 0 10V is required for a 1mm transducer Set the transducer to give 5V over the full range and then with the transducer at null add 5V offset Adjust the Fine Offset control to give 5V When the transducer is moved to the 1mm position the output will be 10V Example 4 20mA is required for a 1mm transducer Set the transducer to give 8mA over the full range and then with the transducer at null add 2 5V approx 5mA offset Adjust
20. rlands Tel 31 0 20 3472121 FAX 31 0 20 6434643 Toll Free in Benelux 0800 0993344 e mail sales omegaeng nl Frystatska 184 733 01 Karvina Czech Republic Tel 420 0 59 6311899 FAX 420 0 59 6311114 Toll Free 0800 1 66342 e mail info omegashop cz 11 rue Jacques Cartier 78280 Guyancourt France Tel 33 0 1 61 37 2900 FAX 33 0 1 30 57 5427 Toll Free in France 0800 466 342 e mail sales omega fr Daimlerstrasse 26 D 75392 Deckenpfronn Germany Tel 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail info omega de One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5BD United Kingdom Tel 44 0 161 777 6611 FAX 44 0 161 777 6622 Toll Free in United Kingdom 0800 488 488 e mail sales omega co uk The information contained in this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for human applications LDX 3A M 1633 0905 1 0 Section 1 0 2 0 3 0 3 1 4 0 4 1 4 2 4 2 1 4 2 2 4 3 4 4 4 5 4 6 4 6 1 LDX 3A Index Title Page Ier Resi b e kat b s 1 Safety Information 2 Introduction 5 LDX 3A Enhancements 5 Installation 2 2 eee ee eee 6 Mounting 00 000
21. s shown in the table below Transducer Full Range Output Input Gain Link Setting 400mV FR to 2500mV FR Standard Range Link Parked on X2 2500mV FR to 5000mV FR High Transducer Output Link ON DIV2 150mV FR to 400mV FR Low Transducer Output Link ON X2 55mV FR to 150mV FR Very Low Transducer Output Link ON X4 L DZ 3A T 20 M 1633 0905 6 0 Half Bridge only Variant This is a Half Bridge optimised variant of the standard product The excitation freguency is higher see specification and the transducer input connector is wired to accept half bridge transducers with standard connections 6 1 Connecting the transducer The 5 pin DIN plug is screwed into the case mounted socket Transducers not fitted with a plug should be wired to the plug supplied LVDT transducers cannot be connected to this input Standard Half Bridge Gauging Probe Plug Connections Black Cable Screen Yellow ae Plug view Case i into pins Note 1 indicates inward movement of the tip Note 2 The transducer body may be disconnected from the cable screen by cutting the black wire inside the connector 6 2 Setting up the Half Bridge Transducer Blue Yellow W Es CH o Centre Tap Red Half Bridge Electrical Connections Red and Blue Energising Yellow Signal Red and Yellow In Phase for Inward Displacement Black Transducer Body Ground The setting up procedure is the same as LVDT transducers See section 5 The sensitivity of
22. should replace it Otherwise fusing and wiring to the LDX 3A must be performed in accordance with local safety regulations Refer wiring and fuse replacement to qualified personnel LU D SE 0O M 1633 0905 3 0 Introduction The LDX 3A is a development of the original LDX 3A It is a compact conditioning module powered from an external power supply unit Adjustable gain and zero controls are provided for use with the complete range of Omega LVDT and half bridge transducers The unit is of robust construction housed in a die cast metal box providing a substantial degree of mechanical protection The LDX 3A uses a universal mains input power supply and provides an output of up to 10V and 20mA 3 1 LDX 3A Enhancements The LDX 3A has the following features Wide gain range allowing ALL Omega transducers to be connected without the need for attenuation resistors Up to 10V de and 20mA are available for all gain settings Fixed and variable offsets make setting of uni polar output easier Gain and offset adjustment are fully independent Selectable transducer excitation frequency Selectable transducer load resistances Selection between forward and reverse connection Fully CE compliant Half bridge transducers can be accommodated with simple plug wiring changes For half bridge only variant see section 6 0 LU H maaa Se Q M 1633 0905 4 0 Installation 4 1 Mounting The LDX 3A may be mounted in a varie
23. the Fine Offset control to give 12mA When the transducer is moved to the 1mm position the output will be 20mA STEP 5 Final Checks Ensure that the calibration is correct by moving the transducer across the required mechanical range checking calibration points Fine adjustment can be made if required It may only be possible to set the output accurately at the two calibration points This is due to non linearity within the transducer LDX 3A EE M 1633 0905 5 0 Setting up the Transducer and LDX 3A continued 5 3 Transducer Sensitivity and the X2 X4 DIV2 Link The LDX 3A compensates for changes in primary signal amplitude by producing an internal error signal that is the ratio between the primary and secondary signals If the transducer output signal is too high or too low errors may occur that can degrade the performance of the LDX 3A transducer combination For these transducers the X2 X4 or DIV2 input gain link must be used Transducer Full Range Output In general transducer sensitivity is quoted as mV V mm Where mV is the output of the transducer V is the primary voltage mm is the mechanical position of the transducer from null usually mid mechanical range To get the transducer Full Range Output multiply all three together Example GP011 1 sensitivity is 210 mV V mm GP911 1 range is 1 mm LDX 3A primary voltage 3V Transducer Full Range Output 210 x 3 x 1 630 mV 0 63V Set the X2 X4 DIV2 link a
24. therwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner LDX 3A RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS FOR NON WARRANTY REPAIRS please have the following consult OMEGA for current repair
25. ty of ways and in any attitude Ensure that there is enough space for the cover to be removed to allow for internal adjustments Space should also be allowed for the transducer connector EMC glands if fitted and cabling It is recommended that the LDX 3A case be connected to earth or chassis This earth connection is not a safety earth but is part of the overall electrical screening scheme The power supply may be mounted in any position The power supply is for indoor use only and must be protected from fluids Ensure that the power supply can be disconnected from the mains This can be by removing the plug from the power supply itself or by disconnection from the mains source Also ensure that the mains lead cannot be accidentally disconnected Underside Mounting Top Side Mounting Note If replacing LDX 3A MKI a retrofit mounting ee 1 kit is available if repositioning holes is not possible A LUH mmaa E Q M 1633 0905 4 0 Installation continued 4 2 Operational Environment This section discusses the type of installation reguired depending on the electrical environment 4 2 1 Residential Commercial and Light Industrial Environments Typically this will be an office laboratory or industrial environment where there is no equipment likely to produce high levels of electrical interference such as welders or machine tools Connections may be made using twisted unscreened wire This is a cost effective option and will give g
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