VRM software TW2 issue1
Contents
1. I ERIE Setpoint 0 T i Enter Setpoint Is persistent x i Persistent on completion M Hald To Zero Non persistent Persistent Idle Zoom 75 100 Vector key i Magnet Logging enabled f PSU settings Limit settings Figure 1 VRM software dialog Page 11 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a reg Brief tour of the main VRM software dialog Cartesian Spherical Coordinate systems for power supply l magnet and setpoint or target vector PSU Output 0 T 0 T 0 Magnet U o r o Choose the desired coordinate system using one of the 3 tabs The display is continuously updated Setpoint 0 T 0 T 0 T The coordinate systems are defined and described in Appendix B Coordinate systems Sweep mode EEEE 5 This provides sweep rate options for driving the magnet from one field vector to another Sweep time min 2 400 Sweep rate T min 0 253 Is persistent i Yo i Persistent on completion L Sweep target and Pete Persistence options Persistent on completion F f Check C you wish the magnets to be automatically placed in persistent mode at the end of a To setpoint or To zero sweep Switch heater timings will be controlled using the heater delay and end of sweep settling time parameters The next chapter shows how to set these This is a message box descri2. May 2012 e Command SYS VRM RVST MODE SET SYS VRM MODE lt P gt will be ignored unless sent Description Sweep mode from present vector to setpoint as fast as possible in a specified at the same time as VSET time or at a specified overall rate SYS VRM RVST TIME SET SYS VRM TIME lt min gt will be ignored unless sent Sweep time to vector setpoint at the same time as MODE and VSET SYS VRM RVST RATE SET SYS VRM RATE lt rate gt will be ignored unless sent Sweep rate to vector setpoint at the same time as MODE and VSET SYS VRM VSET SET SYS VRM VSET etc will be ignored unless sent Vector setpoint magnitudes in Tesla angles in radians at the same time as RVST parameters Sweep to the given SYS VRM ACTN vector as specified by the mode and if requested set persistent on completion SYS VRM ACTN Sweep to zero as fast as possible and if requested set persistent on completion Parameter Result Read write ASAP TIME RATE read write Float value minutes read write Float value read write Tesla minute If COO is CART then x y z CYL then rho theta z SPH then r theta phil magnitudes are in read write Tesla Angles are in radians RTOS RTOZ HOLD PERS read NPERS SAFE IDLE o SYS VRM ACTN HOLD 2012 Oxford Instruments NanoScience All rights reserved VRM Software Manual May 2012
3. A Software Release Notes e If an older version of LabVIEW is already installed on the system PC the pre existing N1488 library may prevent correct software installation If you plan to run the LabVIEW development environment you are advised to upgrade to a newer version e f you wish to run VRM and OXSOFT control software on the same PC using ISOBUS communication protocol use one COM port for instruments controlled by OXSOFT and another COM port for the IPSs controlled by VRM e We recommend that USB serial converters are obtained from National Instruments for full compatibility with this software There is also a file Release Notes txt in the main VRM folder This includes revision history VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee aca_ lt egS SSS FOO Appendix B Coordinate systems Cartesian In Cartesian coordinates a point P is defined by the distances x y and z along the orthogonal axes Figure 16 Cartesian coordinate system VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ooo Spherical In spherical or spherical polar coordinates a point P is specified by a vector of magnitude p rho and two angles 0 theta is defined as the angle from the x axis as viewed in the positive xy plane Valid 8 range O lt 0 lt 27 radians O lt 0 lt 360 degrees phi is defined as the angle fr
4. Cylinder Bho Tesla Z Tesla 1 001000 6 001000 Figure 11 Limits settings for 6Tesla cylinder with 9 46 tilt VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee The second example requires 2 limits envelopes When the Z magnet is at 4 Tesla the permitted tilt of 2 5 translates to a field modulus of 4 x sin 2 5 0 1745 Tesla in the XY plane This is a cylinder 4 Tesla long with radius 0 1745 Tesla as shown in Figure 12 Cylinder Limit Settings Envelope name 4 07 Cylinder Rho Tesla ff Tesla 0 175000 4 001000 Figure 12 Limits settings for 4Tesla cylinder with 2 5 tilt However for full 360 operation the limits describe a 1 Tesla sphere as shown in Figure 13 Spherical Limit Settings Envelope name 1 0T sphere Radius 1 001 Tesla Figure 13 Limits settings for 1Tesla sphere VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a o 9 Finally click OK Field values in the limits settings dialogs should be increased by a nominal 0 001 Tesla to allow for rounding and digitising effects Limits may be subsequently edited or deleted by clicking oor 1e as shown in Figure 9 After editing you are advised to make the file read only If you have the appropriate login privileges navigate to the file right click and select Properties Check the read only attribute To edit the
5. Tesla fa Ae re 1 Run VRMexe neu O e090T fo 0 567 FS EF 0 l Simulation mode recommended to begin with J Fae 2 Start hee aine 0 601522 0 0209994 0 597597 1 3 Enter the field required the start 4 and end 6 0 793551 0 0419862 0 607053 11 orientations the sweep rate and the number of 00625482 oes i Straight sections to approximate the rotation arc eel peers ea l 4 Click on GO 0 7 76202 0 083672 0 624881 11 Field Tesla i 0 766834 0 104748 06332A 1 Tetho o E rae Aror o 12556 0 641225 g l on Pigg 0 746736 0 146299 0 645829 1 P A deg degrees o736022 0 16695 0 656045 E Banat E deg Jo 7zae7 0 167502 0 662877 F B Phi rere 1 hi i 54 deg Eee 0 413268 0 207943 0 669313 l Sweep rate Timin 0 25 tl so 10 701282 0 228261 0 675352 l M 65886 0 248443 0 68099 li STAT TSYTSYEMACTMRTOS 0 676029 0 268478 0 686225 gl U bpe a7 0 286353 0 691051 l 0 6491 72 0 308058 0 695468 1 Go Cancel VO0 635162 0 327579 0 699472 ai 0 620775 0 346906 0 703061 ai The next 2 images show the graphical part of the ConstantField window performing a 10 section sweep VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved magnitude Graphical display options Field key VRM Software Manual Page 39 2012 Oxford Instruments NanoScience All rights reserved Issue 01 May 2012 8 Customer Suppo
6. fast as possible such that all reach zero at the same time HK Til Click to exit the software Next steps New users are advised to familiarise themselves with the functionality of the VRM software by working through Chapter 6 in simulation mode Otherwise proceed to the next chapter describing configuring of the hardware VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee SS 5 Configuring the hardware This consists of 2 parts e Setting up communication with the magnet power supplies e Setting up safe limits of operation for the VRM magnet Configuration steps common to both IPS and Mercury power supplies e Click to give the new window shown in Figure 2 Power Supply Type Simulation Heater delay s 30 Use single command End of sweep settling time s 10 to start and stop sweeps Enabled Invert sign of current E Figure 2 PSU settings dialog showing simulation option VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a SS Enabled W e Click the X axis Y axis and Z axis tabs and uncheck the tick box for any absent magnet PSU Instructions that follow should be applied to the X Y and Z magnets of your VRM system by selecting the appropriate tab Invert sign of current e Check if you wish to reverse the polarity of the chosen magnet This can also be achieved by swapping the magnet power su
7. file at a later date uncheck the read only attribute in the same way VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee aca_ lt egS SSS FOO 6 Operating the software Click the icon to run the VRM software This gives the screen shown in Figure 1 repeated here as Figure 14 By default the software is initially configured to run in simulation mode as shown VRM vi O45 ND A INSTRUMENTS Vector Rotate Magnet field Control version 3 Spherical Cylindrical Cartesian 1 if A Sweep mode PSU Output 0 141 tT As fast as possible Magnet 0 141 7 0 Sy EER TIME immun 2 000 SJWeEED Tate iy Mtr eb ra f Setpoint 0 3 t 8 Enter Setpoint Is persistent x Y r Persistent on completion Ta Setpoint Hold To Zero Non persistent Persistent Idle Zoom 95 500 Vector key PSU output Magnet Legging enabled ial Close Help f PSU settings Limit settings Figure 14 VRM software main dialog Sweep in progress Set target field vector Enter target values using Cartesian Spherical or Cylindrical coordinates then click Enter Setpoint For example Setpoint 4 2 Tq 04 T Oo T Enter Setpoint Page 31 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a reg The display panel now shows a graphical
8. 080SsSsSsSsS eee OO About Oxford Instruments Oxford Instruments specialises in the design manufacture and support of high technology tools and systems for industry research education space energy defence and healthcare We combine core technologies in areas such as low temperature and high magnetic field environments X ray electron and optical based metrology nuclear magnetic resonance advanced growth deposition and etching Our aim is to be the leading provider of tools and systems for the emerging nanotechnology and bioscience markets Oxford Instruments NanoScience Limited Oxford Instruments NanoScience creates high performance environments for low temperature and high magnetic field applications in physical science research and process development down to the atomic scale The business has a strong capability in advanced cryogenics and applied superconductivity Through the application of these technologies we deliver solutions that meet the exacting needs of scientists working at the forefront of fundamental physics applied physics materials science and next generation device development With an extensive customer network a strong reputation for performance and quality we value the support we have provided to world leading research scientists in their pursuit of excellence VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee eS q sSsS0S8080SsSsSsSsS eee OO Appendix
9. 300K Start to End 300K 1032 0 0 25 Y Start to gnd 300K Each magnet can be swept at 0 25 Tesla minute so the limits dialog resembles that given in Figure 9 Whatever values are entered the magnet will not sweep faster than safe limits set in the PSUs VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved e To create a new limits file give ita name and enter the values advised in your Magnet System Operator manual The first example shows the table from the Specifications wiring and test results section of the System Assembly and User Manual Guaranteed maximum central magnetic Up to 6Tesla BMOD with an angle up to 9 46 in field at 4 2 K in any orientation around the Z axis 6 Tesla vector operation e g Z 6T X 0 707T Y 0 707T BMOD 6 0 Angle in XY plane 45 degrees Angle from Z axis 9 46 360 degree three axis operation Up to 1 0 Tesla BMOD by combination of X Y amp Z axis coils This vector rotate system can operate in 2 modes As a 6 Tesla Z vector magnet with a maximum tilt angle of 9 46 the maximum field value in the XY plane is 1 Tesla 0 707 0 707 1 000 This represents a cylinder of height 6 Tesla and radius 1 Tesla In addition the system can operate as a 1 Tesla sphere As this sphere fits inside the cylinder only the cylinder limits envelope needs to be set as shown in Figure 11 Cylinder Limit Settings Envelope name 6T
10. A Resource Name GPIBO 25 INSTR l Figure 5 shows an example where the primary and secondary addresses 1 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a eS q sSsS0S8080SsSsSsSsS eee OO Mercury Settings Dialog vi Comms Layer GPIB yt Ee Re Pee ee VISA Resource Namel GPIB ii i INSTR Figure 5 GPIB dialog for Mercury iPS e ISOBUS RS232 communication requires selection of Baud rate etc Examine the RS232 tab on the Mercury iPS Settings screen for these values If using ISOBUS then you must also set the ISOBUS address of each PSU as given by the ISOBUS tab on the Settings screen Also select the VISA resource name of your Mercury iPS such as VISA Resource Name ASR L3zINSTR as the name for port 3 For more information on ISOBUS protocol refer to Appendix C ISOBUS e Finally test the connection by clicking Test connection _ The standard ISOBUS addresses X 1 Y 2 Z 3 are chosen for convenience only It is simply necessary for each magnet power supply to have a different ISOBUS address VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee Zc Set up communication with IPS120 magnet power supplies e Select Oxford Instruments IPS 120 from the drop down list to give Figure 6 The simulation mode label then disappears from the software main window Power Supply Settings Power Supply Type Ox
11. EaeEaes 29 Figure 14 VRM software main dialog sweep IN progress cceceeeeeeeee sete eee e nets teens tetas na enna e eases ene ena eae 31 Figure 15 VRM envelope schematic veicsecsekcdetdutensecedsatecvscd sasha wtasceaidnacdsaaveuvetivesds iedidawbasseciediateeastucencen 33 Figure 16 Cartesian coordinate system ccccccccececeeeeeeeeeeeeeeeeeeeeeeeeseaeaeeaseseneaseeeaeeeeseaeeseatateataneneneanans 43 Figure 17 Spherical coordinate System saistaudi nina a aE a a a a a a a 44 Figure 18 Cylindrical coordinate system wscxsemendivcuensaucdvenceusesueddicanescwvelvadardsactadancstucendivaresehestvenaccabioases 45 Figure 19 Example showing 3 power supplies connected using an ISOBUS cable ssssassssnsssnnsennnnnnnsnnrrnn 46 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee x VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee oe 8 Welcome Thank you for choosing your equipment from Oxford Instruments a company dedicated to providing world class products and customer support Our highly trained teams are available to help you with all your queries relating to your order delivery or technical issues As an Oxford Instruments customer you have access to a worldwide service and support package providing telephone and on site technical and repair services In the unlikely event that your product should require repair our technicians will initiat
12. Oxford Instruments NETON Ias Control Software for Vector Rotation Magnets Issue 01 May 2012 OXFORD l www oxford instruments com INSTRUMENTS The Business of Science oe Copyright Copyright 2012 Oxford Instruments NanoScience a trading name of Oxford Instruments Nanotechnology Tools Ltd All rights reserved You may make hard copies of this manual for your organisation s internal use in connection with the system with which it was supplied provided that the integrity of the manual is maintained and this copyright notice is reproduced Other than as permitted above you may not reproduce or transmit any part of this document electronically or mechanically without the prior written permission of Oxford Instruments NanoScience Disclaimer Oxford Instruments policy is one of continued improvement The Company reserves the right to alter without notice the specification design or conditions of supply of any of its products or services Although every effort has been made to ensure that the information in this manual is accurate and up to date errors may occur Oxford Instruments NanoScience shall have no liability arising from the use of or reliance by any party on the contents of this manual and to the fullest extent permitted by law excludes all liability for loss or damages howsoever caused Trademarks The Oxford Instruments Logo and Oxford Instruments Direct are trademarks or registered trademarks of Ox
13. a magnet vector and the process that puts the magnet into persistent mode e Where appropriate a VISA resource selection will be available by clicking the LJ button l VISA Resource Name GPIBO 9 INSTR ba found with O This opens the VISA Resource Selection dialog as in the example below VISA Resource Selection x Current Selection GPIBON Ss INSTR Available Resources TCPIPOD 12 16 0 2 7020 50CKET A ASRLE HMSTR qj GFPIBO INTEC GPIO SS INSTR Ca Ce Figure 3 Table showing VISA Resources available Appropriate examples of VISA resource selection will be given as required VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a Set up communication with Mercury iPS magnet power supplies It is necessary to first choose and set up communication protocols in the power supply itself Information on the use of the Mercury iPS will be found in the Mercury iPS manual This can be downloaded from www mymercurysupport com e Select Oxford Instruments Mercury iPS from the drop down list if your magnet is driven by a single Mercury iPS master slave iPSs The simulation mode label then disappears from the software main window Mercury iPS Settings e Click to open the new dialog box shown in Figure 4 Mercury Settings Dialog Comms Layer Ethernet TCP IP IP Address 172 16 138 21 Test connection Figure 4 Ether
14. bing what the software is doing VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a aca_ lt egS SSS FOO A second message box reports Error Clear error button J001 VRM has not inttialsed successfully Please check settings Clear error PSU settings Limit settings a oe to configure the software as described fully in Se apter 5 This graphical display shows the Cartesian axis system and separate arrowheads for the magnetic field vector pink target field vector grey and PSU vector yellow The display is continually updated Zoom 7 10 Use the zoom control to scale the field and PSU vectors on the graph When the vectors fill the graph further increase of scale has no effect Logging enabled l l Tick to log PSU data to a file as follows Logging period ms 5000 MaxFileSize_KB 512 Logging enabled Fj The logging period gives the interval between data points ms When the log file exceeds MaxFileSize a new log file is opened Log files are saved to VRM logfiles with filenames of the form VRMyyyymmdd hhmmss log VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee T Click the button to open a Context Help window as shown below Hover the cursor over the main screen to obtain help text appropriate to the cursor position To Zero sweeps A Y and Z magnets to zero as
15. e Description Command Parameter Result Read write HOLD any sweep that is SYS VRM ACTN SAFE write in progress and put magnet in persistent mode No interruption by Hold SYS VRM ACTN PERS SYS VRM ACTN NPERS VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee o 9 The simple dialog application VRMClient is supplied to explore commands and responses e Navigate to the VRM software main directory and run the application VRMClient e Use the standard LabVIEW buttons ple e to run run continuous or sto the application When the application is running continuously use command Two examples are given below zal STAT SYS VRM COO CART VECT 0 2560T 0 0000T 0 6830T OVEC 0 2560T 0 0000T 0 6830T TVEC 0 30007 0 0000T 0 8000T MCUR 0 25604 0 00004 TO 0 68304 CURR 0 25604 0 00004 0 6830A4 SWHT ON ytes written ON ON POC GFF RFMX 0 2500T m 0 2500T m Send Command 34 1 0000T rn RFST 0 2500T m 0 00107 m 0 6670T m E RVST MODE ASAP TIME 1 2000m RATE 0 71207 m VSET 0 3000T 0 0000T 0 8000T ACTN RTOZ Tinmectiat ala READ SYS VRM CURR STAT SYS VRM CURR 0 07704 0 00004 0 20604 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee eeoeoesseeeSsSsS S SS tor
16. e 3 Table showing VISA Resources available ccccccccee eee ee eee ee eee ee eee ea eee eeeeaeeeeeeeestanenenneanenenananes 17 Figure 4 Ethernet dialog for Mercury iPS ccccc cece ccc e eect eee ene e nen n ene n ene enna e ne ee nae e esta see ea eee enna 18 Figure 5 GPIB dialog for Mercury IPS sccncestnersccearecsacssiosnisacnmette use rsecaeenasfepiompdsnest caw snaeteemenseseneaoueensioxeceas 20 Fidure 6 ISOBUS dialog tor P5120 wuss cctecncccinscnevestecaencgeuucnsiause epeaneesssmatasnodssiedssnusaensecepsacndecoisbesnaneoses 21 Pigtire 7 GPIBdialog Tor VE 1 20 ceatcace sn ctees erence ena Ere E E E E EEEE EENE EAE DEE EEE E EE ECA 23 Figure 8 Limits settings dialog limits file read ONly ccccecc ce ece eee ee eee ee ee eee eases eeetaeeeseeeeetaseeeeeeaseneeseanes 24 Figure 9 Limits settings dialog limits file Can be edited ccececceecee eee ee eee ee eee ee eee ee testes eee eeeestaneaeaetanenees 25 Figure 10 Limits settings dialog 6T cylinder ccsccicoveciccnodensseccesnedecensacsedndleciacewsanseeeaisesceissneddaeanieenseniass 26 Figure 11 Limits settings for 6Tesla cylinder with 9 46 tilt cece eee e eect nets tetas east enna ene ene ene enaeeaes 28 Figure 12 Limits settings for 4Tesla cylinder with 2 5 tilt 2 cece eee eee ee eee eee eee eee eee eee eee eens 29 Figure 13 Limits settings for 1 TeSla SONEre cc cccecee eee ee eee et een eens ene nee n eens ene ene snes n ase a seas nae naSHasnas
17. e service under the terms of your Oxford Instruments warranty At Oxford Instruments we know that your expectations are at the highest level We aim to meet and exceed those expectations in the service that we provide and in the quality you will see when you use Oxford Instruments equipment We are delighted you selected Oxford Instruments as your supplier and wish you success with your new equipment Jim Hutchins Managing Director Oxford Instruments NanoScience VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee eS q sSsS0S8080SsSsSsSsS eee OO 1 Introduction Scope of this Manual This manual describes how to install configure and operate the Vector Rotate Magnet field control software It also contains reference information and includes details of key contacts at Oxford Instruments who are available for help Please keep all the manuals supplied with your system and make sure that you incorporate any amendments that might be sent to you If you sell or give away the product to someone else please give them the manuals too This release of the VRM control software replaces the Magnetic Field Control software The VRM software is designed to e Control the magnitude and direction of the magnetic field vector e Prevent operation beyond the safe limits of the magnet design e Make it easier to integrate a VRM system with the user s experiment The VRM software includ
18. ead write system VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee Oa Description Magnet field PSU persistent field or if switch heater is on ie magnet is non persistent PSU output field PSU output field will be Same as Magnet field if magnet is non persistent Target field from PSU setpoints Magnet currents PSU persistent current or if switch heater is on PSU Output Current PSU output currents will be same as Magnet currents if magnet is non persistent Get status of switch heaters OFF means net is persistent Persistent on completion of sweep Field sweep rate limits Get field sweep rates Parameter Result If COO is CART then x y z CYL then rho theta z SPH then r theta phil magnitudes are in Command SYS VRM VECT Tesla Angles are in radians If COO is CART then x y z CYL then rho theta z SPH then r theta phil If COO is CART then x y z CYL then rho theta z SPH then r theta phil x y z x y and z are in Amps SYS VRM OVEC SYS VRM TVEC SYS VRM MCUR SYS VRM CURR Ix y z x y and z are in Amps SYS VRM SWHT Response is a triple EX Y Zlo OFF ON NOSW FLT SYS VRM RFMX Ix y z x y and Zz in Tesla minute x y z x y and Z in SYS VRM RFST Tesla minute 2012 Oxford Instruments NanoScience All rights reserved Read write SYS VRM POC ON OFF VRM Software Manual
19. es two subsidiary programs that can be run alongside VRM e VRMClient is a simple dialog application for the VRM SCPI commands e ConstantField is an application that allows the user to sweep a field vector of constant magnitude through an arc It is provided an as example Documents supplied with the system The VRM Software is supplied either as a download or CD together with the following documents e Control Software for Vector Rotate Magnets this document Please note that the software was developed within a PC Windows LabVIEW environment and is unsupported if run on a Macintosh LabVIEW environment If additional support is required for the general operation or programming of LabVIEW please contact National Instruments at www ni com labview VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee Oa Revision history This is issue 01 of the VRM Software Manual as shown in the footer at the bottom of each page The changes made to this document and a summary of previous issues are listed in the table below Always use the latest issue of the manual Issue Affected page s Summary of changes 01 All pages First edition of VRM Software Manual Communication with instruments This software supports serial ISOBUS and GPIB communication protocols for the IPS120 power supply and in addition Ethernet communication for the Mercury iPS e The Oxford Instruments ISOBUS system a
20. ford Instruments IPS 120 Aye eater delay lS Use single command End of sweep settling time ts id to start and stop sweeps Enabled Invert sign of current PSU Settings Z J vISA Resource Mame ASRLE INSTR L om ISOBLS Address ee Set ISOBU5 Address Amps per Tesla 1 Test connection Figure 6 ISOBUS dialog for IPS120 e Choose communication protocol type from the drop down list Comunication Protocol ISOBUS GPIB Serial ISOBUS Address SOBUS VISA Resource Mame VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee o 9 e f using ISOBUS then you must use the VRM software to set a unique ISOBUS address for Set ISOBUS Address each PSU within the range 0 9 Click and follow the instructions The standard ISOBUS addresses X 1 Y 2 Z 3 are chosen for convenience only It is simply necessary for each magnet power supply to have a different ISOBUS address For more information on the ISOBUS protocol refer to Appendix C ISOBUS A single COM port and ISOBUS cable must be used to connect all IPSs This must not be shared with other instruments All PSUs on ISOBUS simultaneous sweep W Check to send near simultaneous na are To setpoint and Hold commands to all IPS To communicate with other ISOBUS instruments from Ol such as ITCs and ILMs connect these using a second ISOBUS cable and a different COM port Then use ObjectBench or Ox
21. ford Instruments plc or its subsidiaries The use of our trademarks is strictly controlled and monitored and any unauthorised use is forbidden LabVIEW is a registered trademark of the National Instruments Corporation in the United States and other countries Technical and Customer Support Contact details for Technical and Customer Support can be found on page 40 Oxford Instruments NanoScience Tubney Woods Abingdon Oxon OX13 5QX England Tel 44 0 1865 393 200 Fax 44 0 1865 393 333 E mail nanoscience oxinst co uk www oxford instruments com VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a G Contents 1 DEAT ac 6 2 SEN SS aca ee 8 3 DIAS TAINAN CS UN SN a 10 4 oing un he SOWA S iiai Ti 5 Contig nng the RardWar Sissa aaa iaaa a 15 6 Operating ihe SOWA O csmi 31 7 CNS E ise e 3l 8 COE OO a a a aE E A en Smee eens 40 Appendix A SOR Ware Release ING CS a a 42 Appendix B Coordinate Syste NiS ee Eaa aeaaeae ea ee ene 43 PU e TOR a 46 Appendix D SCPI command reference and VRMCIIEnt susssssuuuuesuuuueuuuuueuunuuenuunnuouunnnnnunnonnuunenununnnunnnununnnenunnnenennne 4 Figures igure 1 YRM S fwae Cl al OO be aaccne sacs sccnticamieecnnesassancentausedacincnsasacenonacessaandouwtsasaeeernaseapcescateneaeeseeee 11 Figure 2 PSU settings dialog showing simulation OPTION cccece ee eee eee ee cess eee ee nena teeta seat eases taneaennnanenees 15 Figur
22. lific USB serial converters with this software In these cases please carry out the simple steps described in Appendix A Software Release Notes before loading the VRM software Installation procedure e Browse to Download the software file VRM_a b c where a b c represents the version number e Unzip the files e find setup exe located in the top level directory e Double click setup exe and follow the on screen prompts You will be asked to choose destination directories and accept the license agreement The list of files similar to the following will normally appear for a clean or new installation Adding or Changing e Al 468 2 2 8 GPIB Analyzer Application Support Lab indowe CY Run Time Engine ef System Configuration 1 1 1 e VAM Files eAl VISA 42 Aun Time Support e Al Spy eA Measurement amp Automation Explorer 4 7 1 You will be required to re start the PC to complete the installation A new icon will appear in the Start menu VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee Oa 4 Starting up the software VRM Click the icon to run the VRM software This gives the screen shown in Figure 1 By default the software is initially configured to run in simulation mode as shown O45 OND Vector Rotate Magret Field Control versions INSTRUMENTS X Sweep mide PSU Output 9 As fast as possible Magnet 0 Sa FEED Time LPT 0 008
23. llows many OI instruments to be connected to a single RS232 serial port with each instrument having a unique ISOBUS address the address is simply a number between 0 and 9 Further details are given in Appendix C ISOBUS e For GPIB communication it is important that the GPIB card is compatible with LabVIEW and your operating system Ideally your GPIB card and driver will be supplied by National Instruments e Standard Ethernet 10 100 Mbits s IEE802 3 TCP IP VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee Oa 2 Safety Issues Safety procedures are vital to prevent e Serious injury or death e Serious damage to the equipment Before you attempt to install or operate the VRM software please make sure that you are aware of all safety precautions listed in this document together with the warnings and cautions set out in other documents supplied with the system All cryogenic systems are potentially hazardous and you must take precautions to ensure your own safety The general safety precautions required when working with cryogenic systems and Superconducting magnets are given in the Safety Matters booklet Safety symbols used in this manual Symbols are used in this manual to draw your attention to safety procedures that you must follow to protect yourself or the equipment There are two types of hazard symbol used in this manual Warning The warning triangle highlights dangers
24. need not be equal In the first example the Specifications wiring and test results section of the System Assembly and User Manual gives 3 tables for the X Y and Z magnets similar to Energisation To Energisation tesla minute Temperature Current A Rate From amps minute If the X Y and Z magnets can all be swept at 1 Tesla minute which is typical the limits setting dialog becomes VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee x Limits Settings Mame of Limits Envelope 6T Cylinder Sweep Rates Tesla min E E Figure 10 Limits settings dialog 6T cylinder VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a oe 9 In the second example below you will find the field sweep rates given in the magnet Summary sheet for Z line 7 X line 11 and Y line 15 4 1 1T VR Magnet Summary Sheet agnet type standard description Magnet drawingnumber eee O 5 ZaxiscurenttoraT lt SK 780A 39H 7 Zaxissweeprate 2 Tin D 0 1 58 340 A Ho X axis Inductance 3 47 H 0 250 Tmin gt 58 340 A 15 Y axissweeprae C o5 LT 17 Maximum guaranteed vectoranglebetween 4T O J So oa OO P 18 Maximum field modulus for 3 axes 360 vector rotation amp gt 8 Cemox sensor Number X66217 32 kg 20 Z Start to End 300K 656 0 Q 21 Z Start to gnd 300K 22 x Start to End 300K 1030 0 Q 23 x Start to gnd
25. net dialog for Mercury iPS VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee aca_ lt egS SSS FOO e Choose communication protocol option from the Comms Layer drop down list Comms Layer Ethernet TCP IP 7 Jv Ethernet TCP IP USB IP Address SOBus RS 232 GPIB Additional features appear in the Mercury Settings dialog depending on the option chosen e The Ethernet option displays only the Mercury iPS IP address as shown in Figure 4 The IP address should match the setting on the Mercury iPS To determine this examine the Ethernet tab on the Settings screen of your Mercury iPS e The USB connection provides a serial interface to your PC The baud rate etc must match the settings on your Mercury iPS Examine the RS232 tab on the Settings screen of your Mercury iPS for these settings Typical choices are given below Baud Rate lt 115200 gt Parity None Data Bits 8 Stop Bits 1 0 Flow Control None A Also select the VISA resource name to match the USB serial port such as VISA Resource Name ASRL3 INSTR Please note that to make use of the USB connection you need to install a USB driver on your PC More information can be found at www mymercurysupport com e For GPIB select the VISA resource name of your Mercury iPS The syntax of the name is of the form GPIB board primary address GPIB secondary address INSTR such as VIS
26. nt slave master Computer RS232 serial PSU with ISOBUS address 1 port PSU with ISOBUS address 2 g PSU with ISOBUS address 3 Figure 19 Example showing 3 power supplies connected using an ISOBUS cable ISOBUS cable VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a aca_ lt egS SSS FOO Appendix D SCPI command reference and VRMClient The following table of SCPI commands is provided for users who wish to integrate the control of a VRM with their experiment The following conventions are used Capital letters label a keyword that must be entered literally e g SET Capital letters in angle brackets label a string that must be substituted e g lt CMD gt might represent SYS VRM COO A list of words separated by vertical lines indicate alternative values for a parameter e g LIN SPL LAGR Commands for configuring or controlling the system are of the form SET lt COMMAND gt lt PARAMETER gt Responses to SET commands are STAT SET lt COMMAND gt lt RESULT gt Commands for interrogating the system are of the form READ lt COMMAND gt Responses to READ commands are STAT READ lt COMMANDSs gt the requested data All commands are terminated by lt CR gt lt LF gt All responses are terminated by lt LF gt The software may be accessed via TCP IP port 33575 Description Command Parameter Result Read write Select co ordinate SYS VRM COO CART CYL SPH r
27. om the positive z axis towards the point P Valid range O lt 9 lt z radians O lt lt 180 degrees Figure 17 Spherical coordinate system VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a aca_ lt egS SSS FOO Cylindrical In cylindrical coordinates a point P is specified as being on a cylinder of radius p rho The projection of P on the xy plane makes an angle 9 with the reference direction x The final coordinate is the distance z along the vertical z axis Valid 0 range r lt 0 lt x radians 179 lt 0 lt 180 degrees Figure 18 Cylindrical coordinate system VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a SS Appendix C ISOBUS ISOBUS is similar to conventional RS232 serial communication but with the following additional features e It allows up to 10 Oxford Instruments devices to be connected to a single computer serial port e There is a special cable manufactured by OINS with 1 master connector plug and up to 10 slave connectors e The master connector is plugged into the computer serial port e Slave connector plug into each instrument e Each instrument is given a unique ISOBUS address 0 9 that is stored in the instrument memory e Communication with the chosen instrument is achieved by knowing the computer serial port identification and the ISOBUS address of the instrume
28. ors However it is not possible to sweep directly from A to B because this would pass outside the field limits envelope x Error 7006 occurred at VrCheckPathl oVector vi Possible reason s Different limits envelopes Go to zero before going to target In these circumstances the above error message is given It may be possible to determine a shorter path from vector A to vector B that does not pass through zero field Sweeping through zero will always work Set sweep rate This single value represents the sweep rate for the overall field vector the geometrical resultant of the 2 or 3 individual magnet sweep rates Select the sweep rate from 3 available options as shown Sweep mode m Specify time to setpoint As fast as possible Astast as possible Specify rate overall e As fast as possible With this option at least one of the magnets will be swept at its limiting rate It minimises the time to reach the target field vector e Specify time to endpoint Rates are calculated so that the sweep from the current field vector to the target field vector takes the time given by Sweep time min which should be specified If you select a time that is too short the software will minimise the time to reach the target field vector VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee eS q sSsS0S8080SsSsSsSsS eee OO e Specify rate overall Rates are calc
29. pply current leads e Choose power supply type or simulation mode from the drop down list Power Supply Type Oxford Instruments Mercury iPS 7 Mercury iPS Settings Simulation Oxford Instruments IPS 120 ommand Stop sweeps Heater delay 5 End of sweep settl lt Oxford Instruments Mercury iPS It is important to ensure that the X magnet power supply drives the X magnet and likewise Y and Z e Set heater delay seconds This heater drives the magnet persistent switch if fitted to its normal state Only when the heater is ON switch open can the current in the magnet be controlled by the power supply The delay gives the heater enough time to guarantee that the switch is open The same value for the delay ensures that the instruction to turn the heater OFF gives it time to cool and close the switch If a current is flowing the magnet will then be in persistent mode There are a number of compromises to be made regarding the choice of switch heater current set up in the magnet power supply and heater delay Advice will be provided in your magnet system manual Further background information on superconducting switches will be found in Practical Cryogenics chapter 6 and your magnet system manual VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee ooo SS o oo Fo e Set end of sweep settling time seconds This sets the delay between the end of the sweep to
30. r waits for the switch to close then runs the PSUs to zero current VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a SS 7 ConstantField The VRM software suite is supplied with the example program ConstantField This sweeps the VRM at constant magnitude through a defined arc Start the VRM software in simulation mode Navigate to the VRM software main directory and run the application ConstantField In the ConstantField window select Start A and End B orientations the sweep rate and the number of straight sections desired to simulate the rotation arc Click the button On first use you will be prompted to confirm communication between ConstantField and VRM E VrmvisAFindInsrumentyi 1 Select IP address 2 Select port number 3 Test the connection 4 successful click on OF IP address 127 0 0 1 Test Connection Poort 33575 3j Success You must click Test Connection and ensure there is a correct response as shown before proceeding The software will then calculate a series of target field vectors Commands are sent to and executed by the main VRM software Issue 01 May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee aca_ lt egS SSS FOO VRM Software Manual Constant Field File Edit Operate Tools Window Help Constant field rotation Y Z array Tesla __ Modulus
31. representation of the target field vector in grey The equivalent values of the field target vector in the other coordinate systems are available by clicking the appropriate tab 0 67082 T 110715 rad 0 729728 rad Setpoint in Spherical coordinates Setpoint 0 447214 y 110715 raq 0 5 T in Cylindrical coordinates Radian egret adians or 2 Degrees Radio buttons permit angles to be set and displayed in If the target field vector is outside the system limit an error message will appear x Error 7007 occurred at VrCheckPathToVector vi Possible reason s reg Page 32 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a Click and the software will calculate safe limits for the field vector coordinates as close as possible to those requested lf the target vector is the same as the start vector the following error will appear X Error 7007 occurred at VrGivenMax CalcRates vi Possible reason s Target vector the same as the start vector recone Click and the software will return the setpoint to zero Figure 15 VRM envelope schematic VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved Figure 15 shows a schematic diagram of a more complex limits envelope in which a cylinder along the Z axis is intersected by a sphere indicated for clarity as a circle in the XY plane Both A and B are permitted field vect
32. rt Warranty The Oxford Instruments customer support warranty is available to all our customers during the first 12 months of ownership from date of delivery This warranty provides e Repair to faults that are a result of manufacturing defects at Oxford Instruments Technical support To obtain technical support you will need to quote your Oxford Instruments order number Please contact your nearest Customer Support centre as follows Europe RoW Main Office Tel 44 0 1865 393 311 E mail helodesk nanoscience oxinst co uk Web www oxford instruments com USA Office Tel 1 800 447 4717 E mail csg ma oxinst com Web www oxford instruments com Japan Office Tel 81 03 5245 3871 E mail supercon jo oxinst com Web www oxford instruments com http oljapan com China Office Tel 86 21 68608530 1 2 3 E mail info oxford instruments com cn Web www oxford instruments com Additional services available from Oxford Instruments Oxford Instruments Direct provides one stop shopping for cryogenics magnetic vacuum and associated laboratory products as well as hard to find reference for low temperature physics optics thermometry and laboratory safety practices You can also visit on line at www oxinstdirect com Ordering parts is easy via phone fax or email Online ordering is available in North America VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee eS q sSsS0S8
33. soft to set their ISOBUS addresses e For GPIB Figure 7 appears The GPIB address is set on the instrument Also select the VISA resource name of your IPS120 The syntax of the name is of the form GPIB board primary address GPIB secondary address INSTR such as VISA Resource Name GPIBO 2 5cINSTR m VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a eS q sSsS0S8080SsSsSsSsS eee OO Power Supply Settings Power Supply Type Oxford Instruments IPS 120 Aye Heater delay s Z Axis x axis Y Axis Enabled Invert sign of current PSU Settings Z Communication Protocol GPIB YISA Resource Mame GPIBO INSTR Amps per Tesla i Test connection Figure 7 GPIB dialog for IPS120 e For simple serial RS232 communication each PSU must be connected to a dedicated PC COM port Also select the VISA resource name of your Mercury iPS such as VISA Resource Name ASRL3 INSTR Lead as the name for port 3 e Set the Amps Tesla for the X or Y or Z magnet from your magnet specification document e Finally test the connection by clicking nection VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee o 9 Set up magnet limits A description of the working limits of your magnet is contained in the file VRM data limits xml e Click to give the dialog box shown in Figure 8 Limits Se
34. ttings Name of Limits Envelope 1 0T sphere Sweep Rates Tesla min x 0 25 Y 0 25 Lee Figure 8 Limits settings dialog limits file read only To view the contents of the limits file left click the envelope name The software is supplied with a limits file that can be edited After editing you are advised to make the file read only If the file is read only and you have the appropriate login privileges navigate to the file right click and select Properties Uncheck the read only attribute e In order to edit the limits file click to give the Limits dialog that allows editing of the Limits file as shown in Figure 9 VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee ee aca_ lt egS SSS FOO C Limits Settings j Mame of Limits Envelope ME g Add limits table P Using cartesian co ordinates Using cylindrical co ordinates Edit Using spherical co ordinates Delete Sweep Rates Tesla min x 0 25 0 25 2 0 25 OK Cancel Help Figure 9 Limits settings dialog limits file can be edited e Right click any limits file to edit or delete the selected file or create a new limits file e Edit the magnet sweep rates as necessary The VRM software is supplied with default values for the magnet Sweep Rates These must be edited to correspond with values advised in your Magnet System Operator manual Values for X Y and Z
35. ulated so that the sweep from the current field vector to the target field vector is the rate given by Sweep rate T min which should be specified If you select a rate that is too high the software will maximise the rate to the target field vector Enter Setpoint lf the target field vector has been set and has been selected the software calculates and displays the Sweep time and Sweep rate If the sweep rate is too high an error will occur as shown below Error 7013 occurred at VrGivenRate CalcRates vi Possible reason s Requested sweep rate is to high Maximum possible has been calculated If you Centinue the maximum possible sweep rate will be used Set persistent non persistent mode Magnets with switch heaters may be set persistent that is with zero current in the PSUs X Yo shows that all magnets are persistent There is zero current in the switch heaters x v z shows that no magnet is persistent The currents for the switch heaters are on Further information on persistent operation of superconducting magnets will be found in your Magnet System Operator manual VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved a eS q sSsS0S8080SsSsSsSsS eee OO Clicking Non persistent runs the PSUs to currents equal to the persistent currents in the VRM magnet and energises the switch heater Clicking turns off the switch heate
36. which may cause injury or in extreme circumstances death Warnings and cautions must be followed to ensure your own safety Caution The general caution symbol highlights actions that you must take to prevent damage to the equipment The action is explained in the text Disclaimer Oxford Instruments cannot accept responsibility for damage to the system caused by failure to observe the correct procedures laid down in this manual and the other manuals supplied with the system The warranty may be affected if the system is misused or the recommendations in the manuals are not followed Warnings Warnings and cautions must be followed to ensure your own safety VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee eS q sSsS0S8080SsSsSsSsS eee OO This manual does not contain safety information for the instruments or systems that this software can be used to control For this information please refer to individual instrument manuals and system documentation VRM Software Manual May 2012 2012 Oxford Instruments NanoScience All rights reserved ee 00 3 Installing the software Use with other NI and OI software Actions must be taken to prevent hardware or software conflict that may occur in the following situations e An older version of the N1488 library is on the system PC e The system PC is also being used to run the OXSOFT control software e Please do not use Pro
Download Pdf Manuals
Related Search