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MEL 1000 System User`s Manual Rev A

1. Figure 1 1 System block diagram copyright 1992 1993 Tristan Technologies 1 1 SMM 1000 System User s Manual om X y xy IL L Figure 1 2 System Front View copyright 1992 1993 Tristan Technologies 1 2 SMM 1000 System User s Manual Figure 1 3 System Floor Plan copyright 1992 1993 Tristan Technologies 1 3 SMM 1000 System User s Manual 1 1 CRYOGENIC SQUID CHIP The SQUID chip has nine integrated SQUIDs Each SQUID has a detection loop 14um X 14um which is set away from the SQUID junctions The detection loops are in a linear array with a spacing of 50m Figure 1 4 SQUID Chip copyright 1992 1993 Tristan Technologies 1 4 SMM 1000 System User s Manual 1 2 COMPUTER CONTROL AND DATA ACQUISITION 1 2 1 Computer Hardware The system is cont
2. 5 4 12 XY Plot PULL DOWN MENU Selecting the XY Plot pull down menu causes the computer to display the panel illustrated in Figure 5 4 12 The user must first Select File to be plotted Subsequent to selecting a file the relevant system parameters contained in the file are displayed in the File Info window All plots are displayed in the Channel plot window A display of the plot is activated by selecting Plot Next Data Set Generally the user selects the appropriate controls or plot parameter before selecting Plot Next Data Set Selecting a Plot Parameter does not cause a plot to be displayed only by selecting Plot Next Data Set is the plot window activated The Restart control allows the user to rewind the currently Selected File to the beginning of the data set This control is provided for as a convenience for the user The Select File control has the same affect as the Restart but the Select File requires the user type in a file name The following describe each control on the XY plot menu X Axis Linear Log Selecting Log takes the log base 10 of the AC magnet data before plotting on the X axis Please note the X Axis AC Magnet control must be selected for Log plot Selecting Linear plots the data directly from the file with no Log taken Y Axis Linear Log Selecting LOG takes the Log10 of the data before plotting Selecting LINEAR causes the data to be plotting without log10
3. 4 28 Figure 5 4 27 High Speed Acquisition Pull Down Menu 4 29 Figure 5 5 1 1 3d Plotting Inputs Menus s ssnssesesneneene 4 31 Figure 5 5 1 2 3d Plot Parameters Menus we 4 33 Figure 5 5 2 Sample Contour Plot 4 34 Figure 5 5 3 Sample Surface Plot 4 35 Figure A 3 1 Probe Op DIAGl atm is sas ans nn Un dr sce NG TIS E A 6 Figure A 3 2 Probe Wiring Diagram 1 A 7 Figure A 3 3 Probe Wiring Diagram 2 Figure A 3 4 Probe Wiring Diagram 8 ae Figure A 3 5 Probe Wiring Diagram 4 A 10 copyright 1992 1993 Tristan Technologies v SMM 1000 System User s Manual WARRANTY WARRANTY Tristan Technologies warrants its products to be free from defects in material and workmanship Obligations under this warranty shall be limited to replacing repairing or giving credit for the purchase price at Tristan s option of any instrument returned shipment prepaid to its factory for that purpose within one year of delivery to the original purchaser provided prior authorization for such return has been given by an authorized Tristan representative This warranty shall not apply to any instrument which Tristan s inspection discloses to have become defective or unworkable due to abuse mishandling misuse accident alteration negligence improper installation or other causes This warranty shall not apply to any instrument or component not manufactured by Tristan
4. Figure 5 4 12 XY Plot MENU 5 4 13 SQUID Control Status PULL DOWN MENU copyright 1992 1993 Tristan Technologies 5 20 SMM 1000 System User s Manual Selecting the SQUID Control Status pull down menu causes the computer to display the panel illustrated in Figure 5 4 13 SQUID controller GPIB Query command and responses from the SQUID controller These GPIB commands are ntt manualumented in the SQUID controller manual Figure 5 4 13 Parameters MENU 5 4 14 GPIB Help PULL DOWN MENU Selecting the GPIB Help pull down menu causes the computer to display the panel illustrated in Figure 5 4 14 GPIB Help GPIB Diagnosis Results GPIB Diagnosis GPIB Reset Figure 5 4 14 GPIB Help MENU copyright 1992 1993 Tristan Technologies 5 21 SMM 1000 System User s Manual By selecting the control GPIB Diagnosis the GPIB Diagnosis Results window displays the contents of the variable ibsta iberr and the state of the GPIB interface hardware lines Activating the GPIB reset control issues the two GPIB commands ibsic and ibcmd These GPIB commands are used to issue a bus reset Issuing a bus reset should not harm any of the GPIB devices or GPIB controller card The National Instruments NI 488 2 MS DOS Software Reference manual contains the definition for the ib terms used above 5 4 15 Heater and Relay Control PULL DOWN MENU Selecting the Heater Relay Control pull down menu causes the computer to d
5. AT6400 Video Card Orchid Technology 830 0071 2 810 Mouse Card Logitech Bus Mouse 0780120 Serial I F Card Monitor SR279128 Keyboard HY199181 NI GPIB 59406 921118000088 SQUID Controller DC0083 Magnetometer SQUIDs PreAmps MultiCards MP159 MP146 MP179 copyright 1992 1993 Tristan Technologies A 5 SMM 1000 System User s Manual A 3 Probe Top Wiring TRANSFER PORT HELIUM LEVEL METER NTS ENTS PUMP OUT PORT ore PUMP OUT PORT SPARE SAMPLE LINES NS Cl A MAGNET INPUT SQUID 1 i SQUID 2 BLANK COVERS SQUID 3 T 9 PHILTEC CONTROL THERMOMETERS MOTORS sd Figure A 3 1 Probe Top copyright 1992 1993 Tristan Technologies A 6 SMM 1000 System User s Manual Figure A 3 2 Probe Wiring Diagram 1 copyright 1992 1993 Tristan Technologies A 7 SMM 1000 System User s Manual ETCIE 26 2V POWER SUPPLY 12V POWER SUPPLY ee Ak Figure A 3 3 Probe Wiring Diagram 2 copyright 1992 1993 Tristan Technologies A 8 SMM 1000 System User s Manual i 1 NNEC TOF H a i io E T BE fe moto
6. EOS 0 i if BINARY_read handle void LAST_OP i STRING TYPE NO_ERR return ERR REPORTED return NO_ERR 7 end function static int read DATA Descriptor int handle titiz char str 100 advance DATA file to class handle str if strcemp str SDATA DESCRIPTOR 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED BINARY_read handle void amp CFG DATA num fields INT TYPE for i 0 i lt nS chan i BINARY read handle void amp CFG DATA SQUID des i STRING TYPE BINARY_ read handle void amp CFG DATA SQUID dtypeli INT TYPE for i 0 i lt nAC chan i BINARY_read handle void amp CFG DATA AC des i STRING TYPE if BINARY read handle void amp CFG DATA AC dtypeli INT TYPE NO ERR return ERR_REPORTED return NO_ERR end function static int read_POSITION int handle char str 100 if DataFileVerNum10 gt 20 advance DATA file to class handle str if stremp str SPOSITION INFO 0 ERROR handle FILE READ ERR NO ADD ERR return ERR REPORTED BINARY_read handle void amp SYS POS num params INT TYPE BINARY_read handle void amp SYS POS data type INT TYPE if SYS POS num_params gt 1 BINARY_read handle void amp SYS POS default_level INT_TYPE if SYS POS num_params gt 2 BINARY_read handle void SYS POS board_type STRING_TYPE file_advance_extra_params SYS POS num_params 3 han
7. Make a full page high resolution print Make a full page medium resolution print Make a half page high resolution print Make a half page medium resolution print Choose a different printer Exit the program and abort print ao3 zZ _ rao copyright 1992 1993 Tristan Technologies 5 35 SMM 1000 System User s Manual NE lt u space bar enter any key not listed Make a color separation Vary Postscript fonts and line widths Reduce and position plot Enter zoom mode Redraw the picture Exit back to 3d user interface display hard copy options menu 5 6 EXTERNAL DOS PROGRAMS 5 6 1 NDE System Batch File Menu Utility Description A helpful utility menu bat organizes execution of NDE system computer programs With the menu bat installed on the NDE system computer operation of the programs is more user friendly and resembles that of a turnkey system The programs NDE 3d DOS s Chkdsk DOS s DIR of the NDE data and the TAPE utility may all be executed though continuous menu selection Menu Appearance The menu bat menu appears to the user as follows Welcome to TRISTAN s NDE system Run NDE Run 3d Plot NOo ROD Exit to DOS Check the Hard Disk Check Data Directory Run TAPE Backup utility Read Read me file Type the number you want and press ENTER Files Required The following files are required 1 c Menu bat 2 c 1 bat 8 c 2 bat 4 c 3 bat 5 c 4 bat 6
8. WARNING LARGE FILES TAKE LONG TIME PERIODS TO CONVERT TO ASCII ALSO LARGE DATA FILES CONVERT TO MUCH LARGER ASCII FILES DISK SPACE IS A CONSIDERATION WHEN CONVERTING A FILE TO ASCII FILE CONVERSION MAY TAKE PLACE OVERNIGHT 5 4 20 Convert Header to ASCII PULL DOWN MENU This utility has the same affect as the one described in 5 4 19 except only the information in the header of the data file is converted to ASCII 5 4 21 Convert ASCII to File PULL DOWN MENU This utility converts the file written by executing the utility in 5 4 19 back to binary form copyright 1992 1993 Tristan Technologies 5 24 SMM 1000 System User s Manual 5 4 22 Dummy Output File PULL DOWN MENU This utility writes a dummy data acquisition data file by using an artificial AC magnet No data acquisition takes place This utility may be executed without any hardware or SQUIDs on the measurement system 5 4 23 Manual Scanner Control Pop Up MENU The Manual Scanner Control Pop Up Menu is accessed by selecting the Pull down menu Manual Table Move This menu may be selected while accessing the AC null Data Acquisition Auto Position Acq or the High Speed acquisition menu s Current Motor Position Indexer A real time display of the current motor position as reported from the AT6400 indexer card Current Motor Position Encoder A real time display of the LAWSON position transducer read of position User Coord The coordinate system for the LAW
9. 5 14 6 1 8 3D PRINTER CONFIGURATION onses 5 14 6 1 9 DATA ACQUISITION ERROR LOGGING 5 14 6 2 NDE Software Modifications 000000000 000 5 14 6 2 2 Accessing NDE Data Files 5 15 Chapter 7 MAINTENANCE 6 1 7 1 DEWAR VACUUM teeters 6 1 APPENDIX A ADDITIONAL INFORMATION iii A 1 AJ SETUP sh E ann ten aie er Ad A 2 COMPUTER HARDWARE SETUP A 1 A 3 Probe Top Wiring cee wn A 6 A4 SMM In tallation 2 25288888 cen eecevee terne ENUNG KEH NGA KEKER NGAKAK KETA ENGETAN A 11 copyright 1992 1993 Tristan Technologies iv SMM 1000 System User s Manual List of figures Figure 1 1 System block diagram ss 1 1 Figure 1 2 Cryogenic dewar amp probe 1 2 Figure 1 3 Cryogenic dewar Dimension 1 3 Figure 1 4 Squid Chip 1 4 Figure 1 5 Sample surface plot from a scan of a magnetic disk 0 00 0 eee 1 8 Figure 1 6 Magnetic Field as a function of distance along the axis 1 8 Figure 1 7 Superconducting magnetic field circuit 1 9 Figure 1 8 Control Console sir we 1 10 Figure 3 5 1 Flo r Layouts cases e ma aa ga e aa da EEN aa Uang near TET SEREN WAKNE NA E eag e 3 3 Figure 5 1 Menu Bar with hardware installed 4 1 Figure 5 2 Menu Bar without hardware installed 4 2 Figure 5 3 Pull Down Menus nane pas adasa pani na apaa an ge pangan e aa TEAS pan nest sa nan dans dre panga TEGEN BE
10. BINARY_read handle void amp SYS GEN MDAC_f1 INT_TYPE BINARY_read handle void amp CFG GEN MDACf1 INT TYPE num_chan count channels SYS GEN MDAC_f1 bit_check 0x0001 for i 0 i lt num_chan it if CFG GEN MDACfl bit check bit check BINARY read handle void amp CFG Mch i inP UNSIGNED_INT_TYPE copyright 1992 1993 Tristan Technologies 6 18 SMM 1000 System User s Manual BINARY read handle void amp CFG Mchli Q UNSIGNED INT TYPE if BINARY read handle void amp CFG Mch i Ran INT TYPE NO ERR return ERR_REPORTED end if bit _check lt lt 1 end for return NO_ERR end function static int read SQUID chan int handle int i bit check j num chan char str 100 advance DATA file to class handle str if stremp str S SQUID CHANNELS 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED BINARY_read handle void amp CFG GEN S_def_fl INT_TYPE BINARY read handle void amp CFG GEN Sfields INT TYPE BINARY read handle void amp SYS GEN MS INT TYPE BINARY read handle void amp SYS GEN Sfields INT TYPE bit_check 0x0001 p num chan count channels CFG GEN S def fl for i 0 i lt num_chan i S 7 if SYS GEN MS amp bit check bit check BINARY read handle SYS Squid i des STRING TYPE Description for each squid for j 0 j lt 3 j BINARY_read handle amp SYS Squid
11. Run 3d Plot echo 3 Check the hard disk echo 4 Check data Directory echo 5 Run TAPE backup utility echo 6 Read Read me file echo 7 Exit to DOS echo prompt Type the number you want and press ENTER Files needed to execute NDE c autoexec bat c config sys c 386max pro c command com c menu bat c 1 bat 2 bat 3 bat 4 bat 5 bat 6 bat 7 bat c atbrds cfg c 386max c dos c at gpib c mouse c nde 3d bat copyright 1992 1993 Tristan Technologies A 3 SMM 1000 System User s Manual c nde nde bat c nde test ndelw exe c nde params startup cfg c nde params system tti c nde 3dcode 3drt exe c nde 3dcode 3d cfg c nde 3dcode gpc c nde ndedata just the directory c nde common include display uir c nde common include plot uir c nde common include hlp NDE runs without the hlp files but requires them for help in NDE copyright 1992 1993 Tristan Technologies A 4 SMM 1000 System User s Manual Software Versions and Serial Numbers Software Packages Vesion Number Serial Number 386Max NI GPIB 422186 55 2 1 1 35733 NI DAQ for DOS Windows NI DAQ for Lab Windows MS DOS version 5 0 1801C102 035 71 Mouse Driver 6 2 MBAL038366 F620 25221435 Tape 0148 3 03 or Hardware Serial Numbers 1004 0337 Hardware 486 PC Mother Board Serial Number 5004513355
12. The Unselect Position File control allows for a data acquisition file write without position information stored in the file and by unselecting the position file the user has manual control of the Bursts File parameter There are three data acquisition trigger modes supported There are the Mouse mode the Remote mode and the Timed mode The Trigger Mode controls how the data is acquired between Bursts With the Trigger Mode on Mouse subsequent Bursts of data are triggered by a click of the mouse button on the Begin Acquisition control With the Trigger Mode on Remote subsequent bursts are triggered by a remote signal to the computer This is for systems with a position control system With the Trigger Mode on Timed subsequent bursts are automatically trigger with a delay of burst interval between each Burst The AC Magnet indicator control is a light indicating if the AC magnet is on or off When the light is colored red the AC magnet is on and no color indicated the AC magnet is off Selecting AC Null causes the AC null algorithm for all installed SQUID channels to be executed Selecting SQUID Reset causes all installed SQUID controller channels to go into reset for 1 second Selecting the Interburst Reset SQUID s to the ON resets the SQUID controller by issuing the GPIB command RSET for 500 milli seconds between subsequent bursts of data By turning OFF the Init SQUID Reset control the SQUID reset pr
13. Tristan representative or the factory in San Diego California Keep the shipping container and packing material for the carrier and insurance inspections If the unit does not appear to be damaged but does not operate to specifications contact the nearest Tristan representative or the Tristan factory and describe the problem in detail Please be prepared to discuss all surrounding circumstances including installation and connection detail After obtaining authorization from the Tristan representative return the unit for repair along with a tag to it identifying yourself as the owner Please enclose a letter describing the problem in as much detail as possible 3 2 REPACKING FOR RETURN SHIPMENT If it is necessary to return the system you should repack the unit in its original container if available For this reason it is advisable to save the original crate sent by Tristan however if this is not possible use the following instructions for repacking 1 Wrap the unit in either bubble wrap or foam rubber 2 Cover the bottom of a sturdy container with at least 3 inches of Styrofoam pellets or shredded paper 3 Set the unit down onto the packing material and fill the rest of the container with Styrofoam or shredded paper The unit must be completely protected by at least 3 inches of packing material on all sides copyright 1992 1993 Tristan Technologies 3 1 SMM 1000 System User s Manual 3 3 SYSTEM COMPONENTS The following co
14. controls have the same meaning as in the Data Acquisition and Auto Position Acq Menu controls The following defines User Interface Controls SQUID Channels Allows the user to select the acquired SQUID channels SQUID Converter Rate Hz This is how fast the A D converter rate is operating in the SQUID controller The possible A D converter rate settings are 6kHz 12kHz 24kHz and 48kHz The fastest possible SQUID acquisition rate is Fastest Acquisition Rate SQUID Converter Rate number of SQUID channels Sample Rate Channel Hz This is the actual data acquisition rate per SQUID channel This data is stored on disk and displayed on the plots if Activate Real Time Display is activated If the GPIB Sample Rate is less than the SQUID A D Converter Rate some of the data is Decimated The decimation factor may be calculated by Decimation Factor SQUID A D converter rate GPIB Sample Rate The Decimation factor is the number of points per SQUID channel to use for a decimation For example if the GPIB sample rate is 100 Hz and the A D converter rate is 6 kHz and one SQUID channel is active Decimation Factor 6000 100 60 Therefore for every 60 samples in the buffer 59 samples are thrown away This algorithm chooses the first sample in the buffer to save Sample Burst The number of samples for each SQUID channel per Burst These samples are stored on disk and plotted if Activate Real Time Display is selected Bursts Scan The number of burst
15. count channels SYS GEN Relay fl for i 0 i lt num heaters i if BINARY read handle void SYS Relay i descr STRING_TYPE NO_ERR return ERR_RE PORTED Ef for j 1 j lt SYS GEN Rfields j if BINARY_read handle void str STRING_TYPE NO ERR return ERR_REPORTED read extra parameters return NO_ERR end function int advance DATA file to class int handle char strl char str 100 str 0 0 if is class found FALSE while str 0 if BINARY_read handle str STRING_TYPE NO_ERR return ERR_REPORTED if str 0 amp amp str 1 str 0 0 strcpy strl str else strcpy strl class name is class found TRUE return NO_ERR end function int BINARY read int handle void val int data type int TAG num bytes char str char str_storage 150 read the tag the number of bytes to read is stored in the tag is_ class_found FALSE strcpy class_name no_class if ReadFile handle amp TAG 2 lt 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED bah if TAG INT TYPE TAG UNSIGNED INT TYPE TAG BINARY QD TYPE ReadFile handle val 2 else if TAG FLOAT TYPE TAG LONG TYPE TAG UNSIGNED LONG TYPE TAG FLOAT IEEE TYPE ReadFile handle val 4 else if TAG DOUBLE TYPE ReadFile handle val 8 else if TAG amp OxO0ff STRING TYPE string typ
16. menus for executing the program with hardware installed The pull down menus associated with no hardware installed are a subset of the pull down menus associated with hardware installed The following ntt manualument describes the pull down menus for hardware initialization the functioning and title of the no hardware pull down menus are the same as that of the hardware installed pull down menus Selecting a title on a pull down menu causes an panel to appear on the screen or the computer to perform some action Controls on the panels initiate some action by the computer WARNING NUMERIC ENTRIES FOR CONTROL BOXES REQUIRE THE KEYBOARD S ENTER KEY TO BE PUSHED PARAMETERS TYPED IN THESE CONTROL BOXES DO NOT UPDATE UNTIL THE ENTER KEY IS PUSHED All of the panels accessed by the program are illustrated below The remainder of this chapter discusses each one of the pull down menu titles System Setup Data Acquisition Data Analysis Utilities Quit Help AC Field Setup AC Field Null Manipulate Data SQUID Control Status DC Magnet Ramp Data Acquisition XY Plot GPIB Help SQUID Control Auto Position Acq 3d Plot Heater Relay Control System Parameter High Speed Acq Function Gen Control Helium Level Check PC Memory Conv File to ASCII Conv Header to ASCII Conv ASCII to File Dummy Output File Create Position File Manual Table Move Conv File to Spread Figure 5 3 Pull Down Menus 5 4 DESCRIPTION OF PULL DOWN MENU TITLES The pull d
17. 1 mm e Adjust tilt e Repeat until AZ approximately 1 um If unable to use Z sensor the sample may be leveled via the following procedure Move to 2 mm 0 0 and 0 2 mm 0 each position move z in plus direction until shut off Record z height move back 100 um 4 Vacuum Can Assembly e Remove any old Indium e Grease with M grease Vacuum Can and top of can sealing surfaces e Grease with M grease New Indium o ring e Install o ring in Vacuum Can e Carefully install Vacuum Can making sure o ring is not disturbed e Tighten all 12 nuts in circular pattern 5 Pump down He purge e Move probe to pump down station e Install valve and bellows e With probe valve closed start Vacuum pump e Open Vacuum line on pump stand and verify Vacuum to approximately lt 200 m e Open probe valve and verify pressure increase e When pressure reads approximately lt 500 m backfill with He until over pressured poppet valves pop Repeat twice more e Close Vacuum valve probe with it backfilled and remove Vacuum line copyright 1992 1993 Tristan Technologies 4 2 SMM 1000 System User s Manual 6 Cool Down The cool down procedure described below assumes the probe is being lowered into liquid He If possible it is preferable to lower into the dewar with LN as this will save He The procedure is the same though one must be careful to remove all LNo before transferring He The dewar can be pressurized to remove the LNo e Raise the
18. 1993 Tristan Technologies 1 6 SMM 1000 System User s Manual 1 2 2 8 Data Analysis Functions After the data has been acquired and stored in a file the operator is able to process the data using a variety of data analysis functions All data that is acquired is stored in a standard format that will include a header file describing all of the important data acquisition parameters A new file will be created by the data analysis function that has the same format as the original file The header file will be modified to indicate that the data has been processed by the specified data analysis function See chapter 5 for more details The data analysis functions supplied includes Decimate This will reduce the number of data points stored in the file by rejecting a specified percentage of the data points A specified number of points at the beginning and end of each data burst can also be rejected FFT A fast Fourier transform will be applied to each burst of data Average This will average the data over a specified parameter e g the data from all bursts in the file could be averaged together or multiple FFT s could be averaged together Slope Calculate the ratio of change in magnetometer output to change in applied field This ratio can be calculated for each cycle of applied ac field or for the average of all cycles of applied field during the data burst Area Calculate the area of the B H loop This can be done for each c
19. 4 NORMAL OPERATION 4 1 REFILLING THE DEWAR WITH LIQUID HELIUM After the initial liquid helium transfer subsequent transfers will be required on a regular basis The liquid helium should never be allowed to completely boil out of the helium reservoir Always refill the dewar while there is still some liquid helium in the reservoir a minimum level of 5 is recommended During normal use this will require that the helium be refilled every 2 3 days To refill the dewar first set up the Model 5000 SQUID Electronics to continuously monitor the helium level see Model 5000 Operator s Manual for Instructions You can transfer liquid helium into this system using standard techniques but you will find it quite helpful to follow the following guidelines Begin to transfer helium with the transfer tube OUTSIDE the magnetometer dewar This will cool down the tube without evaporating liquid in the dewar Do not insert the transfer tube into the magnetometer dewar until liquid helium can be seen coming out the end of the transfer tube it will look like a plume of very cold gas about 5 cm long Then insert your insulated transfer tube into the dewar a total distance of 24 cm from the top plate Transfer at a moderate rate using an approximate pressure in your storage dewar of 10 kilopascal Stop the transfer by venting the storage dewar when the magnetometer dewar reaches about 95 When the storage dewar has been vented back to atmo
20. AMP FLOAT TYPE BINARY read handle void amp CFG AC i freq FLOAT TYPE BINARY_ read handle void amp CFG AC i IS ON INT TYPE file advance extra params CFG GEN ACfields 3 handle end if if SYS GEN AC mag flsbit check bit check BINARY read handle void amp SYS AC i LAB_PC CHAN INT TYPE BINARY read handle void amp SYS AC i AV FLOAT TYPE BINARY read handle void amp SYS AC i R FLOAT TYPE if BINARY read handle void amp SYS AC i TV FLOAT TYPE NO ERR return ERR_REPORTED file advance extra params SYS GEN ACfields 4 handle end if j bit_check lt lt 1 end for return NO ERR end function static int read MDAC global int handle char str 100 advance DATA file to class handle str if stromp str SMDAC GLOBALS 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED BINARY read handle void amp CFG Mgl num fields INT TYPE BINARY read handle void amp CFG Mgl Ran INT TYPE if BINARY read handle void amp CFG Mgl ndat INT TYPE NO ERR return ERR_REPORTED A si file advance extra params CFG Mgl num fields 2 handle return NO ERR end function static int read_MDAC_chan int handle int num chan i bit check char str 100 advance DATA file to class handle str if stremp str MDAC CHANNELS 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED
21. Cold Cover Eyes and Exposed Skin Accidental contact of liquid helium or the cold gas that results from its rapid evaporation may cause a freezing injury similar to a burn Protect your eyes and cover the skin where the possibility of contact exists Eye protection should always be worn when transferring liquid helium 2 3 Keep Air and Other Gases Away from Liquid Helium The low temperature of liquid helium or cold gaseous helium can solidify another gas Solidified gasses and liquid particularly solidified air can plug pressure relief passages and foul relief valves Plugged passages are hazardous because of the continual need to vent the helium gas which evolves as the liquid continuously evaporates Therefore always store and handle liquid helium under positive pressure and in closed systems to prevent the infiltration and solidification of air or other gases Do not permit condensed air on transfer tubes to run down into the container opening 2 4 Keep Exterior Surfaces Clean to Prevent Combustion Atmospheric air will condense on exposed helium cooled piping Nitrogen having a lower boiling point than oxygen will evaporate first from condensed air leaving an oxygen enriched liquid that may drip or flow to nearby surfaces Areas and surfaces upon which oxygen enriched liquid can form or come in contact with must be cleaned to oxygen clean standards to prevent possible ignition of grease oil or other combustible substances Leak test
22. Each FFT is performed on each subsequent burst of data for number of points specified by the user The number of points n for the FFT must satisfy the condition n 2 i iis an integer Operates on both SQUID and AC magnet data The FFT algorithm uses the Lab Windows analysis functions BkmanWin and Spectrum May operate on both SQUID and AC data AC may be OFF The AC data written to the analysis file is real FFT data 5 16 SMM 1000 System User s Manual Running Operates on the entire data set The burst data is AC may be ON or OFF Average truncated at the end of the burst if there are The AC data is not processed insufficient samples in a burst to define a group by the running average of samples for averaging The user specifies the algorithm If the AC is ON number of points to average The average the written analysis file contains operation is performed on the SQUID data only a dummy entry for the AC The SQUID data is added up for the user magnet specified number of samples then divided by the user specified number of samples Filter Performs the filter on each burst of data Only AC may be ON or OFF SQUID data is processed by this algorithm All The AC data is not processed filters Low Pass High Pass Band Pass and by the Filter algorithm If the Band Stop use the Lab Windows Butter worth AC is ON the written analysis analysis functions Bw_LPF Bw_HPF Bw_BPF file contains the same data
23. MENU BARS AND HARDWARE CONFIGURATION 4 1 5 3 PULL DOWN MENUS AND PANELS sisie 4 2 5 4 DESCRIPTION OF PULL DOWN MENU TITLES 42 5 4 1 AC Field Setup PULL DOWN MENU 4 3 5 4 2 DC Magnet Ramp PULL DOWN MENU 00000e0nnen anan ne nenen n nenen ene nenene 4 3 copyright 1992 1993 Tristan Technologies iii SMM 1000 System User s Manual 5 4 3 SQUID Control PULL DOWN MENU 00000r0e0en enem enan anane nne eaaa n nenen nane 4 4 5 4 4 System Parameter PULL DOWN MENU 4 6 5 4 5 AC Field Null PULL DOWN MENU 47 5 4 6 Data Acquisition PULL DOWN MENU 4 8 5 4 7 Enter Timing Parameters MENU 4 10 5 4 8 Auto Position Acq PULL DOWN MENU 4 11 5 4 9 Select Files Pop up MENU 4 12 5 4 10 Create Position File Pop up MENU and PULL DOWN MENU we 4 12 5 4 11 Manipulate Data PULL DOWN MENU eee 4 13 5 4 12 XY Plot PULL DOWN MENU 00000e 00002 4 17 5 4 13 SQUID Control Status PULL DOWN MENU 4 19 5 4 14 GPIB Help PULL DOWN MENU iii 4 20 5 4 15 Heater and Relay Control PULL DOWN MENU 4 21 5 4 16 Function Generator Control PULL DOWN MENU 4 22 5 4 17 Helium Level PULL DOWN MENU 4 23 5 4 18 Check PC Memory PULL DOWN MENU 4 23 5 4 19 Convert File to ASCII PULL DOWN MENU 4 23 5 4 20 Convert Header to ASCII PULL DOWN MENU 4 24 5 4 21 Convert ASCII
24. NO ERR return ERR_REPORTED if NUM OUT _CLASSES lt num read classes read classes NUM OUT CLASSES else read classes num read classes for i 1 i lt read_classes i ee eC E ce N errr N ace nas Sucka ie la nas See ee ee if read DUMMY class handle NO_ERR return ERR_REPORTED copyright 1992 1993 Tristan Technologies 6 15 SMM 1000 System User s Manual return NO_ERR end function static int read DUMMY class int handle int num params i char str 100 if BINARY read handle void amp num params INT TYPE NO_ERR return ERR_REPORTED B for i 0 i lt num params i if BINARY_read handle void str STRING TYPE NO_ERR return ERR_REPORTED return NO_ERR end function static int read_GEN_INFO int handle char str 100 long dummy advance DATA file to class handle str if strcmp str GENERAL INFORMATION 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED aan if BINARY_read handle void amp SYS GEN num_fields INT_TYPE NO_ERR return ERR REPORTED number of parameters if BINARY_read handle void data_fname STRING TYPE NO_ERR return ERR REPORTED read data filename if BINARY_read handle void SYS GEN fdate STRING TYPE NO_ERR return ERR_REPORTED read date if BINARY_read handle void SYS GEN ftime STRING TYPE NO ERR return ERR REPORTED read
25. Rotation Angle deg o 00 Sweep Mode Serpenti sT Raster Micrometer z Millimeter Units Centimeter Inches Motor Steps Step Plot Read Position File Write Position File Fiqure 5 4 10 Create Position File Pop up MENU 5 4 11 Manipulate Data PULL DOWN MENU Selecting the Manipulate Data pull down menu causes the computer to display the panel illustrated in Figure 5 4 11 The Manipulate data controls allow the user to post process a raw data acquisition or a previously post processed data acquisition file Selecting the Select File control causes a user to be prompted for a file name The file associated with the file name typed in by the user should be a valid file for a desired post processed operation The type of post process operations are selected by mouse clicking next to the appropriate operation The post processing operations consist of P P Amplitude Peak to Peak Amplitude B H Area SQUID channel vs AC magnet B H Slope SQUID channel vs AC magnet Average Decimate Data FFT Running Average Digital Filter Multiply Offset and Volts to Tesla Once the appropriate post processing operations are selected Activate Analysis is selected and the post processing operations are executed For every operation selected a file is written This file contains the processed data and can be plotted by the XY plot algorithm AC data is data collected with the AC Magnet ON DC data is data collected with t
26. a dc magnetic field to a sample The dc magnet operates in a persistent field mode The dc magnet is 0 99 cm in diameter and 38 cm long with 250 turns The measured field profile from this magnet is shown in Figure 1 6 The distance from the magnet center line to the Squid chip is about 2 5 cm B Tesla Tesla 0 001 0 0001 0 0 5 1 1 5 2 2 5 3 z cm Figure 1 6 Magnetic Field at 1 Amp as a function of distance along the axis The circuit used in the superconducting magnet circuit is shown in Figure 1 7 The switch heater is activated via an external power supply See the appendix for the pin connections copyright 1992 1993 Tristan Technologies 1 8 SMM 1000 System User s Manual Figure 1 7 Superconducting magnetic field circuit copyright 1992 1993 Tristan Technologies 1 9 SMM 1000 System User s Manual 1 4 Control Console Major part of the system electronics and the computer control system are housed in a custom fabricated control console This console is desk like in nature and is approximately 1 5 m wide by 0 6 m deep by 0 7 m tall Figure 1 8 Control Console copyright 1992 1993 Tristan Technologies 1 10 SMM 1000 System User s Manual 1 7 MEASURED PARAMETERS AND FACTORY TEST DATA The following parameters were measured at Tristan prior to shipment Dimensions and weights are approximate and are given for
27. as and Bw_BSF respectively The user inputs high in the raw data file cutoff frequency low cutoff frequency and filter order appropriately for each filter Multiply Multiplies each SQUID sample of data by a user AC may be ON or OFF input number for the entire file AC data is not The AC data is not processed processed by the multiply algorithm If the AC is ON the written analysis file has the same AC data as the raw data file Offset Adds an offset to each SQUID sample of data for AC may be ON or OFF Volts to Tesla copyright 1992 1993 Tristan Technologies the entire file The user specifies the offset AC data is not processed Multiplies the each SQUID channel by volt to tesla conversion factor stored in the data file by each SQUID sample of data for the entire file The AC data is not processed The AC data is not processed by the offset algorithm If the AC is ON the written analysis file contains the same AC data as the raw data file AC may be ON or OFF If the AC is ON the written analysis file contains the same AC data as in the raw data file 5 17 SMM 1000 System User s Manual Filename extensions DATA Set CYCLE BURST FILE RAW DATA N A N A DAT Peak to peak amp AMC AMB N A Area Slope Average Decimate FFT Running Average N A RU N A N A BBP N A N A N A MLF N A N A OSF Volt to Tesla N A A TES ASCII file ASC Binary file BIN Position XYZ
28. burst interval BINARY read handle void amp CFG ACQ indel DOUBLE TYPE initial delay if BINARY read handle void amp CFG ACQ sfreq FLOAT TYPE NO ERR return ERR REPORTED SQUID sample freq T if CFG ACQ num_fields gt 8 BINARY_read handle void amp CFG ACQ raw_ndat LONG_TYPE num of samples file advance extra params CFG ACQ num fields 9 handle return NO_ERR n end function static int read_DC int handle int num_chan i j char str 100 advance DATA file to class handle str if stremp str DC MAGNET 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED a if BINARY read handle void amp SYS GEN DC mag fl INT TYPE NO ERR return ERR_REPORTED TO a E BINARY read handle void amp SYS GEN DCfields INT TYPE BINARY read handle void amp CFG GEN DCf1 INT TYPE BINARY_ read handle void amp CFG GEN DCfields INT TYPE num chan count channels SYS GEN DC mag f1 for i 0 i lt num chan i BINARY read handle void amp CFG DC i AMP FLOAT TYPE BINARY read handle void CFG DC i AMPtd STRING TYPE file advance extra params CFG GEN DCfields 2 handle BINARY read handle void amp SYS DC i AV FLOAT TYPE BINARY read handle void amp SYS DC i TV FLOAT TYPE BINARY read handle void amp SYS DC i R FLOAT TYPE BINARY read handle void amp SYS DC i E FLOAT TYPE for j 0 j lt 3 j BINAR
29. c 5 bat 7 c 6 bat 8 c 7 bat 10 c nde nde bat 11 c nde 3d bat 12 c autoexec bat Contents of Files Menu bat echo off cls echo echo echo Welcome to TRISTAN s NDE system echo copyright 1992 1993 Tristan Technologies 5 36 SMM 1000 System User s Manual echo echo echo echo echo echo echo echo echo echo Type the number you want and press ENTER Run NDE Run 3d Plot Check the hard disk Check data Directory Run TAPE backup utility Read Read me file Exit to DOS NO O1 B D 1 bat echo off cls cd nde call nde cd menu 2 bat echo off cls cd nde call 3d cd menu 3 bat echo off cls chkdsk f pause menu 4 bat echo off cls dir c nde ndedata w p pause menu 5 bat echo off cls cd tape tape cd menu 6 bat echo off cls type c nde read me more pause menu 7 bat copyright 1992 1993 Tristan Technologies 5 37 SMM 1000 System User s Manual echo off cls prompt p t h h h h h h d h h h h h g 5 7 TYPICAL AC ACQUISITION AND ANALYSIS MENU SELECTION 1 AC Field Setup set the desired frequency and amplitude of the AC magnet Turn the AC magnet control on 2 DC Magnet Ramp if a different field is desired in the DC magnet 3 SQUID Setup set the sample frequency in the SQUID controller 4 AC Field Null null the AC field 5 Data Acquisition setting the proper number of samples bursts and trigger mo
30. m m_ m_ m_ m if SYS GEN num fields gt 18 BINARY read hand e void SYS GEN encoder STRING TYPE if SYS GEN num fields gt 19 BINARY read hand e void amp SYS GEN NCUIN INT TYPE if SYS GEN num fields gt 20 BINARY read hand e void amp SYS GEN WAVETEKIN INT TYPE if SYS GEN num fields gt 21 BINARY read hand e void amp SYS GEN LABPCIN INT TYPE if SYS GEN num fields gt 22 BINARY_read handle void amp SYS GEN KEPCOIN INT TYPE file advance extra params SYS GEN num fields 23 handle return NO_ERR end function static int read GEN ACQ int handle copyright 1992 1993 Tristan Technologies 6 16 SMM 1000 System User s Manual char str 100 advance DATA file to class handle str if stremp str S GENERAL ACQUISITION 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED BINARY_read handle void amp CFG ACQ num_fields INT TYPE if BINARY read handle void amp CFG ACQ Sf1 INT TYPE NO ERR return ERR_REPORTED SQUID flag BINARY read handle void amp CFG ACQ ADf1 INT TYPE Analog in flag BINARY read handle void CFG ACQ MODE STRING TYPE acquisition mode BINARY_read handle void amp CFG ACQ ndat LONG TYPE num of samples BINARY read handle void amp CFG ACQ nburst LONG TYPE num of bursts BINARY read handle void amp CFG ACQ bint DOUBLE TYPE
31. multiplier 5 Descriptor SQUID 6 Volts Tesla Low SQUID 6 Volts Tesla Medium SQUID 6 Volts Tesla High SQUID 6 lacquisition multiplier 6 NCU heaters on system number of parameters channel descriptor channel descriptor channel descriptor channel descriptor channel descriptor channel descriptor channel channel ONDA amp NH MAX MDAC on system number of parameters SQUID channel for list MDAC 1 SQUID channel for list MDAC 2 SQUID channel for list MDAC 3 lposition info in data file number of parameters data type of coordinates FLOAT DOUBLE INT LOW or HIGH Indexer limit switches level AUX1 Indexer Board type YES or NO turn indexer off Indexer address in Decimal Movement Mode 1 SINGLE AXIS 2 ALL AXIS 3 X SQUID Mode 1 and 2 X positive move Mode 1 and 2 Y positive move Mode 3 A motor sign move Mode 3 B motor sign move Mode 3 A motor AT6400 axis Mode 3 B motor AT6400 axis number of parameter on axis Inumber of axis on system ldistance per revolution in inches axis 1 steps per revolution axis 1 lvelocity axis 1 lacceleration axis 1 lpulse width axis 1 deceleration axis 1 distance per revolution in inches axis 2 steps per revolution axis 2 lvelocity axis 2 lacceleration axis 2 pulse width axis 2 deceleration axis 2 number of parameters copyright 1992 1993 Tristan Technologies 6 6 SMM 1000 System User s Manual
32. plot 3 Execute 3d select appropriate controls in the user interface and plot 5 5 1 1 3d Plotting Inputs MENU The user activates figure 5 5 1 1 on the computer by executing the program 3d The following describe each control on the 3d Plotting Inputs Menu Squid Channel Allows the user to select which SQUID channels are plotted The user must select a file before the SQUID channels can be selected The SQUID channels selected controls are limited to those SQUID channels acquired and stored in the NDE data file AC Allows the user to select the AC magnet data for plotting Change Plot Parameters Activating this control causes the computer to display the Manual Scaling menu illustrated in figure 5 5 1 2 Change Axis Labels Activating this control causes the computer to display the Axis Labels menu illustrated in figure 5 5 1 2 Surface Contour Selects the SURFACE or CONTOUR plotter Help Displays the help menu associated with the 3d Plotting Inputs Menu Select Data File Allows the user to select a data file for plotting The SQUID channels data AC magnet data and position coordinates are stored in the data file Each channel is mapped to a Z coordinate on the surface plot and the contour levels for the contour plot Select Position File Allows the user to select a position file that is used with the data file when plotting Normally the data file contains position information and the position file is not selec
33. reduction CFG display channel CFG monitor filter COWS SSERVICE HISTORY class from SYS File This area in the file is reserved for a sevice history of the system Any modification or service to the system hardware must be logged here Please type in all text before the next and use a standard text editor such as DOS EDIT This history gets written to the data files Data files have gone to version 2 1 The Service History class is limited to 50 lines and 80 characters per line DATE DESCRIPTION nde code comments 29 June 92 System startup and initialization 29 March 93 More service history Line required to end Service history SHEATER REFERENCE class L 2 3 4 5 6 7 8 SYS Heater channels 1 number of heater params DC_Magnet_ 1 Heater Description Circuit 1 SQUID 1 Heater Description Circuit 2 SQUID 3 Heater Description Circuit 3 SQUID 5 Heater Description Cirkt 4 AC relay 1 Heater Description Circuit _ 5 Heater Description DC_Magnet_ 2 Heater Description DC_Magnet_ 3 Heater Description SMDAC MAP class 1723 MDAC channels installed 1 number of MDAC params 1 SQUID channel for MDAC 3 SQUID channel for MDAC 5 SQUID channel for MDAC SLAST OPERATION class DUMMY RAW DATA EOS SDATA DESCRIPTOR class 18 number of parameters SQUID CHANNEL 1 FLOAT data type SQUID CHANNEL 2 FLOAT data type SQUID CHANNEL 3 FLOAT data type SQUID CHANNEL 4 FLOAT data type SQUID CHANNEL 5 FLOAT data
34. reference only Performance data is the result of testing done at Tristan Under ideal conditions you should expect to achieve similar performance in your laboratory but small differences are to be expected 1 7 1 System details Helium Dewar Dewar Capacity 21L Equilibrium Helium Consumption 5 Uday Suggested Operating Time Between Refills 3 days Dimensions Overall Height 46 inches Maximum Diameter 17 inches Weight empty 50 lb Construction All Al dewar with fiberglass neck Superinsulated Helium Level Sensor Superconducting Wire with 1012 active length Volts at 026 8 3 Volts Noise SQ 1 SQ2 SQ3 T V x108 Calculated 56 56 SQUID 11 Hz 3 3 effective area x 10 2m2 196 196 Vi 19 19 fT HHHZ 1X10 10 1X10 10 1X10 10 all above on range 5 TUNE SQ 1 SQ 2 SQ 3 BIAS SKEW V pp mon TUNE VOLTS Panel copyright 1992 1993 Tristan Technologies 1 11 SMM 1000 System User s Manual Chapter 2 SAFETY PRECAUTIONS 2 1 SAFETY PRECAUTIONS FOR HANDLING LIQUID HELIUM AND LIQUID NITROGEN The potential hazards of handling liquid helium stem mainly from the following properties WARNING 1 THE LIQUID IS EXTREMELY COLD HELIUM IS THE COLDEST OF ALL CRYOGENIC LIQUIDS 2 THE ULTRA LOW TEMPERATURE OF LIQUID HELIUM CAN CONDENSE AND SOLIDIFY AIR 3 VERY SMALL AMOUNTS OF LIQUID HELIUM ARE CONVERTED INTO LARGE VOLUMES OF GAS 4 HELIUM IS NOT LIFE SUPPORTING 2 2 Extreme
35. routine operates the heat switches and ramp the field as required The operator is required to turn the main power on to the magnet power supply 1 2 2 3 SQUID Control All necessary functions of the SQUID system are under computer control via the IEEE 488 bus Utilities are provided to allow direct operator control of GAIN SQUID RESET RANGE SQUID Heaters These and many other SQUID control functions are automatically controlled as required to perform various sample measurements In particular all necessary data acquisition parameters are automatically set by the computer prior to a sample measurement copyright 1992 1993 Tristan Technologies 1 5 SMM 1000 System User s Manual 1 2 2 4 Heater Control The magnet persistent switch heater SQUID heater and pick up coil heaters are operable from the computer console These heaters are also automatically switched on and off as required for various sample measurement procedures 1 2 2 5 Interface to Automated Motion Control The system is interfaced to an automated magnetometer positioning mechanism a remote positioning mechanism Communication between the remote positioning mechanism and the data acquisition computer will coordinate the motion of the remote positioning mechanism to the acquisition of data Position information will be entered into the computer by a format described in the POSFILE EXE in chapter 5 1 2 2 6 AC Signal Nulling Complete control of th
36. taken AC Magnet selection causes the AC Magnet data to be plotted on the X axis Teslas Volt If Tesla is selected the data is multiplied by the testla to volts conversion number stored in the data file The data is assumed to be in stored in volts copyright 1992 1993 Tristan Technologies 5 18 SMM 1000 System User s Manual WARNING THE DATA FILE MAY BE CONVERTED TO TESLA BY SELECTING VOLTS TO TESLA IN THE MANIPULATE DATA MENU THE USER MAY SELECT TESLA IN THE XY PLOT MENU AND THE DATA IS ALREADY CONVERTED TO TESLA THE PLOTTED DATA IS WRONG DO NOT SELECT TESLA IN THE XY PLOT IF THE DATA HAS ALREADY BEEN CONVERTED TO TESLA Data Set The data is plotted by cycle burst file trace or position file If trace data may be plotted vs the position information in the data file or the position file One Cycle A cycle of data corresponds to data collected during one AC magnet cycle For plotting the AC magnet must be ON the file is of raw data and there must be more than one AC magnet cycle per burst One Burst Data collected at one position The file can be raw data or an analysis file and there must be more than one data point per burst Entire File The entire data set in a file is plotted without regard to cycle or burst One X Trace Plots SQUID channel or AC magnet vs position Position is one X trace of the table Each trace is plotted by selecting Plot Next Data Set Position Fi
37. type SQUID CHANNEL 6 FLOAT data type SQUID CHANNEL 7 FLOAT data type SQUID CHANNEL 8 FLOAT data type AC Magnet 1 DOUBLE data type copyright 1992 1993 Tristan Technologies 6 12 SMM 1000 System User s Manual SPOSITION INFO 12 FLOAT HIGH AUX1 NO 768 3 A 2 8 class SYS number of parameters coordinate data type SYS Indexer default level SYS Indexer board type Indexer Driver on always Indexer Address move mode 1 1 axis 2 all axis 3 X SQUID mode 1 and 2 X positive move mode 1 and 2 Y positive move mode 3 X positive move mode 3 X negative move IA motor axis number B motor axis number CFG number of parameters C NDEWORK NDEDATA DUM xyz pos file name Centimeters Hello NONE NONE 10 0 00000000 5 00000000 SSCANNER INFO 6 2 0 20000000 25000 1 00000000 1 00000000 0 30000000 1 00000000 0 20000000 25000 1 00000000 1 00000000 0 30000000 1 00000000 SCOIL INFO 0 SDEWAR INFO 0 SRELAY REFERENCE 1 2 3 4 5 6 1 DC_Magnet_ 1 DC_Magnet_ 1 DC_Magnet_ 2 DC_Magnet_ 2 DC_Magnet_ 3 DC_Magnet_ 3 SPOSITION READ 3 lposition units comment store position file NONE or X Y store transducer NONE or X Y number of X traces XY trace rotation angle Fieldtek optical peak class number of parameters number of axis linches per revolution steps per revolution lvelocity lacceleration lpulse width ldeceleration linches per rev
38. 0 SRELAY REFERENCE 1 2 3 4 5 6 1 DC Magnet_ 1 DC Magnet_ 1 DC_Magnet_ 2 DC Magnet 2 DC_Magnet_ 3 DC_Magnet_ 3 SPOSITION READ 3 5 600 0 28 0 57 560 0 28 0 57 2 600 28 0 57 3 number of parameters lRelays Parameters lDescriptor relay lDescriptor relay lDescriptor relay lDescriptor relay lDescriptor relay lDescriptor relay RPRPRPRPEPPR Number of Channels Number of parameters per channel base address 1 card channel 1 mode 1 sample time 1 axis map 1 base a card c Imode 2 ak mode 3 sample time 3 axis map 3 6 1 4 EXAMPLE STARTUP CFG FILE TRISTAN CFG FILE Ziel SGENERAL INFORMATION 5 dummy params startup cfg 09 28 1993 10 33 31 9 SGENERAL ACQUISITION 9 1 2 3 0 Timed 2 5 0 00000000 0 00000000 100 0 2 SDC MAGNETS 1 2 3 2 0 0 07 15 1993 11 12 39 0 0 07 15 1993 11 12 39 0 0 07 15 1993 11 12 39 SAC MAGNETS NOWE OH copyright 1992 1993 Tristan Technologies TRISTAN id Version num class one number of parameters luser comment File Name lfile creation date lfile creation time Number of Classes class two number of parameters SQUID channels on Analog in channels on Acquisition Mode Samples Burst number of bursts file ltime between bursts linitial delay squid box sample freq Raw data Samples Burst class three DC magnets defined number of parameters current am
39. 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense H Tesla Volt channel 3 4 Range 1 5s 2 5 3 50 4 500 3 Gain 1 1x 2 2x 3 5x 4 10x 3 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense L Tesla Volt channel 4 4 Range 1 5s 2 5 3 50 4 500 4 Gain 1 1x 2 2x 3 5x 4 10x 4 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense L Tesla Volt channel 5 4 Range 1 5s 2 5 3 50 4 500 5 Gain X 2 2x 3 5x 4 10x 5 SELS 2 2k 3 4k 4 16k 5 NO 6 Dect 7 Tune 8 Sense L Tesla Volt channel 6 4 Range 1 5s 2 5 3 50 4 500 6 Gain 1 1x 2 2x 3 5x 4 10x 6 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense L Tesla Volt channel 7 4 Range 1 5s 2 5 3 50 4 500 7 Gain 1 1x 2 2x 3 5x 4 10x 7 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense L Tesla Volt channel 8 3 lRange 1 5s 2 5 3 50 4 500 8 Gain 1 1x 2 2x 3 5x 4 10x 8 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense SSQUID globals lclass eight 8 number of parameters 0 SQUID box REPF SQUID box AD converter rate ADCR 0 SQUID box decimation factor 3 SQUID box data type DTYPE 0 SQUID box digital filter mode copyright 1992 1993 Tristan Technologies 6 8 SMM 1000 System User s Manual 0 SQUID box BWRF iki SQUID box monitor channel CHAN vK 1 SQUID box monitor filter MONF SPOSITION INFO class 8 number of parameters C NDEWORK NDEDATA DUM xyz position file name Centimeters lposition units Hello comment NONE store
40. 6 781 2242 6 707 2298 6 SSQUID CHANNELS 12 3 4 5 6 7 8 4 Pe re PETET 5 SQUID1 1cm_axial_ AC 6 7e 009 0e 006 0e 006 0 bo SQUID2_1 5 mm mag 5 62e 008 0e 006 0e 006 0 0 4 SQUID3 3mm axial AC 88e 007 z 0e 006 3 1e 005 0 2 4 SQUID4 3mm axial 3 07e 008 0e 006 0e 006 40 bo SQUID5_3mm_axial_ AC 7e 007 0e 006 0e 006 0 fo SQUID6_3mm_axial 3 7e 008 0e 006 0e 006 0 bo bo copyright 1992 1993 Tristan Technologies CFG AC null number of class SYS MDAC channels ava CFG MDAC channels def CFG in Phase 1 CFG Quad 1 CFG Range 1 CFG in Phase 2 CFG Quad 2 CFG Range 2 CFG in Phase 3 CFG Quad 3 CFG Range 3 class CFG SQUID channels de CFG number of paramet SYS MAX SQUIDS SYS number of paramet SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range CFG SQUID box Gain 1 CFG SQUID box PPL fi SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range 2 CFG SQUID box Gain 2 CFG SQUID box PPL fi SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range 3 CFG SQUID box Gain 3 CFG SQUID box PPL fi SYS SQUID Descripto
41. 74 5 6 5 SQUID1 1cm_axial_ AC 6 7e 9 K 0e 6 0e 6 0 SQUID2 1 5 mm mag 5 62e 8 0e 6 0e 6 Number of parameters per magnet lAmp volt conversion for mag 1 Resistance conversion for mag 1 Volt Tesla at tail mag 1 The error volts for mag 1 Ramp rate 1 amps sec lRamp rate 2 Ramp rate 3 Time delay 1 Time delay 2 Time delay 3 Time delay 4 Time delay 5 Time delay 6 Lab PC board number mag 1 Lab PC analog in KEPCO on off sense Lab PC analog in amps sense for KEPCO Lab PC analog out KEPCO driver INCU Heater channels of DC magnet 1 Amp volt conversion for mag 2 Resistance conversion for mag 2 Volt Tesla at tail mag 2 The error volts for mag 2 dummy dummy dummy dummy dummy dummy dummy dummy dummy Lab PC board number mag 2 Lab PC analog in KEPCO on off sense Lab PC analog in amps sense for KEPCO Lab PC analog out KEPCO driver INCU Heater channels of DC magnet 2 lAmp volt conversion for mag 3 Resistance conversion for mag 3 Volt Tesla at tail mag 3 The error volts for mag 3 dummy dummy dummy dummy dummy dummy dummy dummy dummy Lab PC board number mag 3 Lab PC analog in KEPCO on off sense Lab PC analog in amps sense for KEPCO Lab PC analog out KEPCO driver INCU Heater channels of DC magnet 3 The Number of AC Magnets The Number of parameter mag LAB PC Analog in channel The AMP Volt c
42. 94e 000 1 914117e 000 4 128707e 000 4 137207e 000 1 085793e 000 2 034948e 000 3 999574e 000 4 433653e 000 6 1 7 NDE PRINTER CONFIGURATION The NDE printer configuration menu may be accessed by typing the following DOS commands 1 c gt cd ndecode 2 c ndecode gt ndelw config The NDE printer configuration menu then appears The user may then change the printer type by selecting Configure Output For higher quality outputs users may choose to use PostScript printers 6 1 8 3D PRINTER CONFIGURATION The 3D software may be configured by executing the program EQUIP from the c nde 3dcode gpc directory The EQUIP program then prompts the user for the desired printer 6 1 9 DATA ACQUISITION ERROR LOGGING If a Data acquisition error occurs during a burst or at a position the number of that burst or position is logged to a file The file name is c nde ndecode NDEERR LOG Every time a data acquisition occurs the NDEERR log file is erased and re written The nature of the Data acquisition errors are with data transmission or data manipulation in the SQUID controller 6 2 NDE Software Modifications 6 2 2 Accessing NDE Data Files NDE data and analysis files are written in Microsoft binary format These binary files include a header and data The header and data are in a format specific to the NDE program No other computer program such as Microsoft Excel can directly read a NDE binary file This section discusses methods for accessing
43. D controller 2 Tristan Noise Cancellation Unit NCU 3 Wavetek function generator 4 AT6400 indexer for table scanner movement 5 Lawson 20 bit AD position transducer for position read Hardware Configurations Options supported by the NDE software Each NDE system has a subset of the hardware configuration described above The configuration is established at the factory prior to shipment If the hardware configuration is changed at a time subsequent to shipment the NDE software may easily be re configured in the field to support any of the above listed hardware configurations Subsequent to hardware initialization the menu bar in Figure 5 1 appears on the computer screen System Setup Data Acquisition Data Analysis Utilities Quit Help Figure 5 1 Menu Bar with hardware installed copyright 1992 1993 Tristan Technologies 5 1 SMM 1000 System User s Manual NOTE THE PC S MEASUREMENT COMPUTER PROGRAM REQUIRES THE CORRECT INSTALLATION OF INTERFACE CABLES AND POWER ON FOR HARDWARE INITIALIZATION OF THE CONFIGURED DEVICES If the user desires to execute the program without hardware installed a subset of hardware initialization menu bar appears on the screen as illustrated in Figure 5 2 System Setup Data Analysis Utilities Quit Help Figure 5 2 Menu Bar without hardware installed 5 3 PULL DOWN MENUS AND PANELS The menu bars titles allow access to pull down menus Figure 5 3 illustrates all of the pull down
44. ER CONTROL USES THE UNITS DISPLAYED IN ITS OWN MENU DATA ACQUISITION WILL ALWAYS MOVE IN UNITS OBTAINED FROM THE POSITION FILE Define Current Position with Coordinates If selected the user in presented with another panel allowing for the defining of the current position Optical Peak Voltage This control is active only for system with the LAWSON position transducer card The optical peak voltage allows the user to set a peak voltage used in the interpolation the z position user coordinate The peak voltage is set by 1 Installing the sample in the probe copyright 1992 1993 Tristan Technologies 5 25 SMM 1000 System User s Manual 2 Moving the Z stage until the peak voltage the found The Z position voltage is read by changing the encoder from User Coord to volts 8 Input that peak voltage into the Optical Peak Voltage control Define Acquisition Rotation Angle This control is currently not available Manual Scanner Control K Y Z T Current Motor Position Indexer Current Motor Position Encoder user Coord Cal Table Units S Absolute Hove Coordinates 0 000000 0 000000 0 000090 2 000000 fav to en Stop Motion Indexer Command Define Current Position as Origin Optical Peak Voltage Units lmicrometers Define Current Position with Coordinates Hove Hardware Home and Set as Origin Define Acquisition Rotation Angle Figur
45. Fl gt If Any Error Enabled System Boot Up Nun Lock On Weitek Processor Absent Floppy Drive Seek At Boot Enabled System Boot Up Sequence DAG Ci System Boot Up CPU Speed High Fast Gate A20 Option Enabled Password Checking option Disabled Shadow RAM Option Disabled BIOS SETUP PROGRKM ADVANCED CHIPSET SETUP c 1990 American Megatrends Inc All Right Reserved On Board Serial Port 1 Disabled On Board Serial Port 2 2fB On Board Parallel Port 378 on Board Floppy Controller Enabled On Board IDE Controller Enabled 8 bit DNA Active Clocks 2 CLKs 16 bit DMA Active Clocks 2 CLKs DMA Clock SCLK 2 Command Delay 8 bit Cycle No Command Delay 16 bit Cycle No 8 bit 1 0 Wait States 4 WS 16 bit I O Wait States 0 WS Size 203MB copyright 1992 1993 Tristan Technologies A 2 SMM 1000 System User s Manual Contents of 386max pro config sys autoexec bat Files 386max pro RAM B800 C900 exclude video area RAM F000 10000 config sys Device C 386MAX 386MAX SYS pro c 386max pro DOS HIGH UMB devicehigh c newgpib gpib com files 30 buffers 20 8 stacks 9 256 devicehigh c mouse mouse sys shell c command com c E 1024 p f autoexec bat set echo off prompt p t h h h h h h d h h h h h g PATH DOS numlock SET TMP c tmp set TEMP c temp set GPC C nde 3dcode gpc echo off cls echo echo echo Welcome to TRISTAN s NDE system echo echo echo 1 Run NDE echo 2
46. For the program nde to use the experiment cfg file s stored parameter s the following menu options are selected system parameter read user file and then the user types in the appropriate experiment file name WARNING Several of the important parameters in the startup cfg and experiment cfg file include 1 The peak amplitude in ampere s of the last DC field stored in the DC magnet 2 The SQUID Tesla Volt ranges 3 The MDAC settings for AC null The startup cfg file always gets updated with these important parameters The experiment cfg file only gets updated with the parameters when the user explicitly saves the system parameters to a file The program s System Parameter menu can be used to save the system parameters to a experiment file If an experiment cfg file is read by nde as the input file the value for the important parameters in the file may not be correct During nde s process of reading in an experiment cfg file the user is asked if the program should use the important parameters in the experiment cfg file or the startup cfg file For most user s the parameters stored in the startup cfg file are the correct ones Raw and Analysis File Format These files are in written in DOS binary mode Binary mode files are used to preserve disk space Binary mode files can not be read into a word processor or text editor When the DOS type command is issued with a binary file the characters display on th
47. N Figure 5 4 1 AC Field Setup Menus Figure 5 4 2 1 DC Field Ramp Menus Figure 5 4 2 2 DC Ramp File Illustration ES Figure 5 4 3 SQUID Control Menus sssi iiinis aviaire Figure 5 4 4 System Parameter Menus ss Figure 5 4 5 AC Field Nul Menus Figure 5 4 6 1 Data Acquisition Only Scan Menus ae Figure 5 4 6 2 Remote mode timing illustration 410 Figure 5 4 7 Enter Timed Mode Parameters Menus 4 11 Figure 5 4 8 Auto Position Scan Menus s es 4 11 Figure 5 4 9 Select Files Menus 0 0 cee 4 12 Figure 5 4 10 Create Position File Pop up Menus 4 13 Figure 5 4 11 Manipulate Data Menus is 4 14 Figure 5 4 12 XY Plota Menusa ass sanes a agak a ena naen ag ae ae Ng a ARA Ta NENG a chestaieeccsessdsheptsienteasaat ents 4 19 Figure 5 4 13 Parameters Menus c cee 4 20 Figure 5 4 14 GPIB Help Menus 4 21 Figure 5 4 15 Heater and Relay Control Menus 0 0enenenenenena nenen enan ananem nne en en ena nane ne nane 4 22 Figure 5 4 16 Function Generator Control Menus sserenenaaae anan an ananem nenen nenen n neneman 4 23 Figure 5 4 17 Helium Level Menus 0 cess 4 23 Figure 5 4 23 Manual Scanner Control Pop Up Menu 4 25 Figure 5 4 24 XY Plot Labels Pop Up Menu 4 26 Figure 5 4 25 XY Plot Manual Scaling Pop Up Menu 4 26 Figure 5 4 26 XY Plot Enter Manual Scaling Pop Up Menu 4 27 Figure 5 4 27 High Speed Acquisition Pull Down Menu
48. NDE data and analysis files by hard copy output or with other PC programs or on other computer platforms The methods of accessing NDE files written during data acquisition include 1 Using the XY plot feature in the NDE program 2 Using the 3d plot in the 3d program 3 Using the NDE s Conv File to ASCII and then post processing the ASCII file Post processing includes porting that ASCII file to another computer or using that file by a PC program such as Microsoft Excel If the ASCII file is ported to another computer a program could be written to process that file on that platform copyright 1992 1993 Tristan Technologies 6 14 SMM 1000 System User s Manual 4 Porting that binary data or analysis file to another platform and then writing code to read that file An NDE binary file has a smaller size than the ASCII file containing the same information If disk space or porting time is important processing files in binary format is a better choice than processing ASCII files Reading NDE Binary Files with a Computer Program NDE Binary Files contain a header and data The header contains NDE system parameter and configuration information pertinent to the data in the file Examples of information stored in the file header include the magnitude of the AC and DC field the SQUID sample frequency the number of bursts of data the number of samples per burst of data etc Those parameters are stored on a byte by byte basis according
49. ORT IRQ DMA 0 0x2C0h 11 5 15 N A N A N A N A Ox3F8h 4 N A N A Ox2F8h 3 N A N A 0x378h 7 N A N A N A 5 N A N A 0x300h Disabled N A PRIMARY QD WAVETEK 0 15 9 none none none 1 Sec 1 Sec 1 Sec no no no no no no 7 bit 7 bit 7 bit 00H 00H 00H es es es yes no no no N A N A no N A N A 2 usec N A N A default N A N A yes N A N A 0x2C0h N A N A 5 N A N A 11 N A N A IEEE 488 Setu Binary Check Sum _ Enable Send EOI Yes Output Buffer Mode Overwrite Send EOS No EOS Val 10 230H 238H 568ms GND Channel 0 Channel 1 Channel 0 Channel 1 Contents of PC BIOS BIOS SETUP PROGRAM STANDARD CMOS SETUP C 1990 American Megatrends Ine All Rights Reserved Date mn date year Fri Jun 18 1993 Base memory 640 KB Time hour min sec 09 34 38 Ext memory 7168 KB Daylight saving Disabled Cyin Head WPcom LZone Sect Hard disk C type 47 USER TYPE 683 16 o 0 38 Hard disk D type Not Installed Ploppy dxive A 1 2 MB 5 1 4 Floppy drive B 1 44 MB 3 1 2 Primary display VGA PGA EGA Keyboard Installed BIOS SETUP PROGRAM ADVANCED CMOS SETUP C 1990 American Megatrends Inc All Riehts Reserved Typematic Rate Programming Disabled Typematic Rate Delay msec Typematic Rate CCharseSec 15 Above 1 MR Memory Test Memory Test Tick Sound Memory Parity Error Check Enabled Hit lt DEL gt Message Display Enabled Hard Disk Type 47 RAM Area 0 300 Wait For lt
50. REP ORTED for j 1 j3 lt SYS GEN Hfields j if BINARY_read handle void str STRING TYPE NO_ERR return ERR_REPORTED read extra parameters return NO_ERR end function static int read_MDAC_MAP int handle char str 100 int i j num_chan advance DATA file to class handle str if strcemp str SMDAC MAP 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED if BINARY_ read handle void amp SYS GEN MDAC fl INT TYPE NO ERR return ERR_REPORTED num chan count channels SYS GEN MDAC fl if is class found FALSE BINARY_read handle amp SYS GEN Mfields INT TYPE read the num of params if SYS GEN Mfields gt 0 amp amp is_ class_found FALSE copyright 1992 1993 Tristan Technologies 6 20 SMM 1000 System User s Manual for j 0 j lt num chan j BINARY read handle amp SYS MDAC j SQUID chan INT TYPE for i 1 i lt SYS GEN Mfields it m T BINARY read handle str STRING TYPE read extra parameters return NO_ERR end function static int read LAST OP int handle LINE LS char str 100 advance DATA file to class handle str if stremp str LAST OPERATION 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED if BINARY read handle void LAST OP 0 STRING TYPE NO ERR return ERR_REPORTED z E for i 1 i lt 7 amp amp strcmp LAST OP i 1
51. SON position transducer read The choices include user coord stage coord and volts Absolute The coordinate system used in table movement The choices include relative and absolute The default is absolute Move Coord The user desired coordinate for table movement WARNING THE TABLE MOVEMENTS WHILE ACQUIRING DATA ARE IN RELATIVE COORDINATES IF RELATIVE IS SELECTED IN THE MANUAL SCANNER CONTROL MENU RELATIVE COORDINATES USE NO HOME EACH MOVE IS RELATIVE TO THE LAST IF ABSOLUTE COORDINATES ARE DESIRED PLEASE SELECT ABSOLUTE BEFORE EXITING THE MENU FOR DATA ACQUISITION Move to Origin Selecting this control causes the table scanner to move to 0 0 or the user defined home Move Activates the table scanner for movement to the coordinates defined in the Move Coordinates control boxes STOP MOTION The emergency stop button to kill table movement Indexer Command This control is reserved for factory use Define Current Position as Origin The current table scanner position is defined at the new origin 0 0 or home Move Hardware Home and Set as Origin Moves the table scanner to the Hardware Home defined by Limit switches on the table This control applies only to systems installed with home limit switches Units Defines the units for table movement WARNING DATA ACQUISITION MOVEMENT IS DEFINED BY UNIT INFORMATION CONTAINED IN THE POSITION FILE IF THE UNITS ARE DIFFERENT IN THE MANUAL SCANNER CONTROL THE MANUAL SCANN
52. Scanning Magnetic Microscope 1000 Computer Controlled 3 Channel Magnetometer System B L E TRISTAN TECHNOLOGIES SAN DIEGO CALIFORNIA U S A copyright 1993 Revision Record August 1993 Oct 5 1993 Product Release 1993 by Tristan Technologies Inc All rights reserved No part of this manual may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of Tristan Technologies Inc Tristan reserves the right to change the functions features or specifications of its products at any time without notice Any questions or comments in regard to this product and other products from Tristan please contact Tristan Technologies Inc 6191 Cornerstone Court E Ste 107 San Diego CA 92121 U S A phone 619 550 2700 fax 619 550 2799 CRYOLAB is a trademark of CRYOLAB Corporation GraphiC 6 0 is a trademark of Scientific Endeavors Corporation LabWindows is a trademark of National Instrum
53. The DC field has been ramped 3 An Autozero is completed The updated MDAC values are then stored copyright 1992 1993 Tristan Technologies 6 2 SMM 1000 System User s Manual The file system tti contains information specific to the measurement system hardware configuration and is normally not changed from the factory settings An third file may be used by the program nde This third file is not required by the program but is provided for as a convenience for the user to define a system configuration for his own experiment The experiment file name is user selected and this name should not be startup cfg or system tti This experiment cfg file contains the same parameters and has the same file format as the file startup cfg When this file is used by nde the startup cfg file parameters are not used by the measurement system There are two methods for writing the experiment cfg file to the hard disk The first method consists of reading the startup cfg file into an ASCII editor such as DOS 5 s edit modifying the appropriate parameter s in that file and then saving that file to a name other than startup cfg The sequence of events for the second method of writing an experiment file consists of executing the program nde modifying the appropriate parameters via the program s menu screens selecting the program s system parameters menu option and then the user types in a file name for storing those modified parameters
54. This procedure may be repeated several times until the helium level is low WARNING THE PRESSURE IN THE VACUUM SPACE MUST NEVER BE ALLOWED TO CHANGE QUICKLY RAPID PRESSURE CHANGES WILL CAUSE PERMANENT DAMAGE TO THE THERMAL SHIELD AND SUPERINSULATION If the dewar does not perform well after pumping the vacuum or if it requires pumping at intervals more frequent than once a year there may be a leak in the dewar If you suspect this problem contact your Tristan representative for assistance copyright 1992 1993 Tristan Technologies 7 2 NDE 1000 System User s Manual APPENDIX A ADDITIONAL INFORMATION A 1 SETUP A 2 COMPUTER HARDWARE SETUP Interrupts and addresses GPIB card QD SQUID Controller COM1 NCU COM2 LPT1 BUS MOUSE Compumotor AT6400 IEEE address amp setup v2 1 1 Pri address Sec address Timeout setting Terminate read on EOS Set EOI with EOS on Writes Type of compare on EOS EOS byte Send EOI with last byte of write System controller Assert REN swhn SC Enable Auto serial poll Bus timing Parelle Poll Duration Use this GPIB Interface Base I O Address DMA Channel Interrupt Level QD SQUID controller IEEE 488 Setup page Lawson Labs A D Cards Address 1 Address 2 Settling time Pin 4 Pin 6 Pin 8 Pin 13 Pin 15 copyright 1992 1993 Tristan Technologies A 1 SMM 1000 System User s Manual IEEE address 1 0 P
55. When products manufactured by others are included in Tristan s equipment the original manufacturer s warranty if any is extended to purchaser to the extent permitted by that manufacturer Tristan reserves the right to make changes in design at any time without incurring any obligation to install same on units previously purchased There are no warranties which extend beyond the description herein This warranty is in lieu of and excludes any and all other warranties or representations expressed implied or statutory including merchantability and fitness for purpose as well as any and all other obligations or liabilities of seller including but not limited to special or consequential damages No person firm or corporation is authorized to assume for Tristan any additional obligation or liability not expressly provided for herein copyright 1992 1993 Tristan Technologies vi SMM 1000 System User s Manual Chapter 1 Introduction 1 1 SYSTEM OVERVIEW The main components of the system are Liquid Helium Dewar Three Channel Scanning SQUID Magnetometer Probe Computer Control and Data Acquisition System Pump Down and Warm Up Station Probe Crane Probe Stand Control Console Miscellaneous Accessories Optical Microscope w stand Lab Jack Motor Cable Position Sensor Cable X Y Stage Extension Cable One GPIB cable 6 Level Meter Cable 15 These components are shown in Figures 1 1 amp 1 3
56. Y_read handle void amp SYS DC i Rate j FLOAT_TYPE for j 0 j lt 6 j if BINARY read handle void amp SYS DC i Time j FLOAT TYPE NO ERR return ERR_REPORTED z if SYS GEN DCfields gt 13 BINARY_read handle void amp SYS DC i LAB PC BOARD INT TYPE BINARY read handle void amp SYS DC i LAB PC KEPON INT TYPE BINARY read handle void amp SYS DC i LAB PC AMPSENSE INT TYPE BINARY read handle void amp SYS DC i LAB PC KEPON INT TYPE BINARY read handle void amp SYS DC i HEAT ON NCU INT TYPE file advance extra params SYS GEN DCfields 18 handle end for return NO_ERR end function static int read AC int handle int bit check i num chan copyright 1992 1993 Tristan Technologies 6 17 SMM 1000 System User s Manual char str 100 advance DATA file to class handle str if strcmp str AC MAGNET 0 ERROR handle FILE READ ERR NO ADD_ERR return ERR_REPORTED if BINARY read handle void amp SYS GEN AC mag fl INT TYPE NO ERR return ERR_REPORTED AN BINARY read handle void amp SYS GEN ACfields INT TYPE BINARY read handle void amp CFG GEN ACfl INT TYPE BINARY_read handle void amp CFG GEN ACfields INT TYPE num_chan count channels SYS GEN AC_mag_f1l bit check 0x0001 for i 0 i lt num_chan i if CFG GEN ACfl bit check bit check BINARY read handle void amp CFG AC i
57. a acquisition When the AC magnet is turned on the AC field is automatically acquired and written to the output data file AC Field Setup AC Magnet Amps Peak 5 0000 ac Frequency Hz 1 0000 On AC Magnet Control off lal Figure 5 4 1 AC Field Setup Menu 5 4 2 DC Magnet Ramp PULL DOWN MENU Selecting the DC FIELD Ramp pull down menu causes the computer to display the panel illustrated in Figure 5 4 2 1 DC FIELD RAMP Enter DC Magnet Amps LC 7 Parameters Note If Last DC magnet current is incorrect edit the file startup cfz Figure 5 4 2 1 DC Field Ramp Menu Please see figure 5 4 2 2 for an illustration of the DC Magnet Ramp algorithm copyright 1992 1993 Tristan Technologies 5 3 SMM 1000 System User s Manual Fiqure 5 4 2 2 DC Ramp Algorithm Illustration The user sets the Enter DC Magnet Amps field and then selects Activate The DC Magnet Ramp algorithm consists of ramping the DC magnet from zero amps to the last applied amps ramping from the last applied amps to the Enter DC Magnet Amps and then ramping to zero amps Heater switches are also turned on and off during this ramping process The panel s Parameters field displays the last DC magnet amps and the time and date of the last update The last DC magnet amps and other DC Magnet Ramp parameters as illustrated in figure 6 2 are stored in the STARTUP CFG input file This value is read when the program is initial
58. ar larger or smaller with an eyeball position further away or closer to the surface The eyeball position only yields a vector direction to the surface copyright 1992 1993 Tristan Technologies 5 33 SMM 1000 System User s Manual Figure 5 5 1 2 3d Plot Parameters MENU 5 5 2 CONTOUR PLOT EXAMPLE Figure 5 5 2 illustrates an example contour plot obtained by using the TRISTAN 3d plot utility this is 816 points total Figure 5 5 2 Sample Contour Plot copyright 1992 1993 Tristan Technologies 5 34 SMM 1000 System User s Manual 5 5 3 SURFACE PLOT EXAMPLE Figure 5 5 3 illustrates an example SURFACE plot obtained by using the TRISTAN 3d plot utility Figure 5 5 3 Sample Surface Plot 5 5 4 3D HARD COPY OPTIONS The 3d plot utility is configured to obtain a high resolution HP Laser Jet print out For a complete listing of the printing capabilities please see the Scientific Endeavors GraphiC manual This manual presents a condensed procedure to obtain a hard copy The following procedure lists an easy method to obtain a hard copy Execute 3d in the usual manner option 2 from batch file system Select a data and position file Select the appropriate scaling options Select Plot Once the data is plotted to the screen the following options are available by typing the selected key 2 3 4 5 Key Typed Action Convert TKF file to another format Redirect the printer output to a file
59. ated cold gas can become trapped between the closed ends a pressure relief device must be provided in that line to prevent excessive pressure build up 2 6 Keep Equipment Area Well Ventilated Although helium is nontoxic it can cause asphyxiation in a confined area without adequate ventilation Any atmosphere which does not contain enough oxygen for breathing can cause dizziness unconsciousness or even death Helium being colorless odorless and tasteless cannot be detected by the human senses and will be inhaled normally as if it were air Without adequate ventilation the expanding helium can displace air and result in an atmosphere that is not life supporting The cloudy vapor that appears when liquid helium is exposed to the air is condensed moisture not the gas itself The issuing helium gas is invisible Liquid containers should be stored in large well ventilated areas If a person becomes groggy or loses consciousness when working around helium get them to a well ventilated area immediately If breathing has stopped apply artificial respiration If a person loses consciousness summon a physician immediately copyright 1992 1993 Tristan Technologies 2 2 NDE 1000 System User s Manual Chapter 3 INSTALLATION 3 1 INITIAL INSPECTION All Tristan instruments and equipment are carefully inspected and packaged at Tristan prior to shipment However if a unit is received mechanically damaged notify the carrier and the nearest
60. channel vs Magnet control causes the following to occur 1 The computer acquires data for one cycle of AC magnet and SQUID data for the channel selected 2 The least squares linear regression fit of the SQUID channel versus the AC magnet volts is then calculated 3 The best linear fit data and raw data are then plotted in the SQUID Channel plot window 4 The text box window displays the slope offset and error terms from the linear regression 5 4 6 Data Acquisition PULL DOWN MENU Selecting the Data Acquisition pull down menu causes the computer to display the panel illustrated in Figure 5 4 6 This panel is displayed during data acquisition Figure 5 4 6 1 Data Acquisition Only Scan MENU copyright 1992 1993 Tristan Technologies 5 7 SMM 1000 System User s Manual Selecting a SQUID channels radio control button chooses that channel for data acquisition Only SQUID channels may be selected from the channels installed on the system Subsequent to selecting Begin Acquisition data is acquired for the SQUID channels and if selected the AC magnet channel Selecting Change Time Delays causes the computer to display the Enter Timing Parameters pop up panel discussed in the section 5 4 7 of this manual The Samples Burst control is the number of samples in a Burst of data The Bursts File control is the number of Bursts for a File of data The Sample Rate Hz control is the acquisition rate for each sample of data
61. control the user is prompted for a data or analysis file name in binary format Status A display is the current status of the conversion process Please note if no file conversion is taking place the Status control displays Idle Channels Allows the user to select which SQUID channels to convert copyright 1992 1993 Tristan Technologies 5 29 SMM 1000 System User s Manual Indexer Allows the user to select the AT6400 indexer channels to convert Encoder Allows the user to select the LAWSON position read channels to convert Delimiter The seperator used for subsequent data in the converted file Format The options include Matrix or Column If Matrix is choosen the data is written in the following format 1 The X indexer positions are in the first row 2 The Y indexer positions are in the first column 3 The channel data is written in matrix format corresponding to entries that match the position in the appropiate row and column 4 There is on file written for each channel or encoder position If Column is choosen the data is written in the following format 1 Each channel of data is written in a column Channels of data include SQUID channels indexer channel or encoder channels 2 There is one file written for all the channels 3 Each column is labeled with the appropiate channel number One File per Channel Currently not available Convert Activates the process of converting the slected file and options to a spread
62. de 6 Manipulate Data execute the desired analysis on the acquired data 7 XY plot plot the analyzed or raw data 8 3 D plot create an XY position file and plot with the an analysis file having one sample per burst The following illustrates some of the lengths of time for total data acquisition for typical data sets SAMPLE OF DATA SETUPS SQUID sample Samples TOTAL TIME AC 1HZ cycles 1 AC 2HZ cycles 2 rate Hz AC cycle HZ in burst AC cycle Hz in burst 1000 2500 2 5 sec 1000 2 5 500 5 10 sec 25 sec 125 sec 200 sec fast 005 2500 12 5 sec med 01 2500 25 sec slow 08 2500 200 sec copyright 1992 1993 Tristan Technologies 5 38 SMM 1000 System User s Manual Chapter 6 FILE STRUCTURE amp MAINTENANCE 6 1 DIRECTORY STRUCTURE AND EXAMPLE DATA FILE Section 6 1 1 discusses the directory structure necessary for executing the program NDE The directory structure listing contains the sub directory name and the sub directory file names The listed files and directory structure are neccessary to execute the program Section 6 1 2 describes the NDE file structure An important part of program operation is understanding the file structure Section 6 1 3 lists an example output raw data acquisition file listing The listing includes a header comments and some raw data This file is a ASCII representation of the data file The ASCII representation is created by fir
63. dle copyright 1992 1993 Tristan Technologies 6 21 SMM 1000 System User s Manual BINARY read BINARY read BINARY read BINARY read handle void amp CFG POS num params INT TYPE handle void amp CFG POS pos_fname STRING TYPE handle void amp CFG POS pos units STRING TYPE handle void amp CFG POS comment STRING TYPE BINARY_ read handle void str STRING TYPE CFG POS store pos file fl decode pos file string str 20 BINARY read handle void str STRING TYPE CFG POS store trans fl decode trans string str 20 BINARY read handle void amp CFG POS num_traces INT TYPE file_advance_extra_params CFG POS num_params 6 handle else CFG POS store pos file fl CFG POS store trans fl 0 return NO_ERR end function static int read SCANNER int handle char str 100 int TA advance DATA file to class handle str if stremp str S SSCANNER INFO 0 ERROR handle FILE READ ERR NO ADD _ERR return ERR REPORTED BINARY_ read handle void amp SYS SCAN num params INT TYPE if SYS SCAN num_params gt 0 BINARY_read handle void amp SYS SCAN num axis INT TYPE for j 0 j lt SYS SCAN num axis j BINARY_ read handle void amp SYS SCAN inch rev j DOUBLE TYPE BINARY_ read handle void amp SYS SCAN steps rev j LONG TYPE BINARY_ read handle void amp SYS SCAN velocity j DOUBLE TYPE BINARY_read handle void amp SYS SCAN accel
64. e copyright 1992 1993 Tristan Technologies 6 23 SMM 1000 System User s Manual num bytes TAG gt gt 8 num_bytes amp 0x00ff TAG amp 0x00ff if data_type STRING_TYPE ReadFile handle val num bytes str val 7 str num bytes 0 if str 0 is_ class_found TRUE strcpy class_name str else str_storage num_bytes 0 if str_storage 0 is_ class_found TRUE strcpy class_name str_storage else ReadFile handle str storage num bytes ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED return NO_ERR end function copyright 1992 1993 Tristan Technologies 6 24 SMM 1000 System User s Manual Chapter 7 MAINTENANCE 7 1 DEWAR VACUUM Because there is some diffusion of helium through warm fiberglass helium gas should not be allowed to remain in a warm dewar for extended periods There is also a small amount of helium diffusion that occurs during normal operation through the warm upper portion of the neck tube Large quantities of air water and other gasses are also outgassed from the warm interior surfaces of the dewar vacuum space However there is a getter in the vacuum space which absorbs large amounts of gas when the dewar is cold Therefore the vacuum space should not require any maintenance for over a year of normal operation Eventually the vacuum space of the dewar will need to be re evacuated This will b
65. e 5 4 23 Manual Scanner Control Pop Up Menu 5 4 24 XY Plot Labels Pop Up MENU The XY Plot Labels Pop Up Menu is accessed by selecting XY Plot Pull Down Menu and then the Modify Labels control The controls on the Labels Menu illustrated in figure 5 4 24 are used when plotting data from the XY plot menu The following describe each control Plot Title The label at the top of the plot Label The label parallel to each axis X or Y Number Digits Right of Decimal Point The graph numeric axis labels format Number of Divisions The number of numeric labels appearing on each axis Fixed Point Scientific Notation The format of the numeric axis labels Asterisk Data Each data point is Asterisked Label Plot with Channel Number Print the channel number on the plot Restore Defaults Restores the most commonly used labels copyright 1992 1993 Tristan Technologies 5 26 SMM 1000 System User s Manual Fiqure 5 4 24 XY Plot Labels Pop Up Menu 5 4 25 XY Plot Manual Scaling Pop Up MENU The XY Plot Manual Scaling Pop Up Menu is accessed by selecting XY Plot Pull Down Menu and then the Modify Scaling control The controls on the Manual Scaling illustrated in figure 5 4 25 are used when plotting data from the XY plot menu For the following description the control applies to the appropriately selected X or Y axis Manual Scale N Axis By selecting this control the manual scaling parameter are used during plotting instead of auto scalin
66. e AC Field Nulling Circuit allows the operator to manually null the in phase and quadrature signal from the ac magnet that is detected by each SQUID channel An automated procedure is also supplied that automatically nulls the signal from all channels by issuing a single command prior to data acquisition 1 2 2 7 Automated Data Acquisition Procedures Three classes of automated data acquisition procedures are supplied manual trigger mode timed mode remote trigger mode In each of these the operator is prompted to specify e channels from which data is to be acquired e data acquisition rate samples sec e number of data points to be acquired in a single burst e ac field amplitude and frequency If the operator desires and the acquisition rate is slow enough to allow for it the operator is able to view the acquired data in real time on the CRT monitor Manual Trigger Mode In the manual mode the operator may trigger each burst of data using the mouse Multiple bursts will be stored in a single file Timed Mode In the timed mode each burst of data will begin after a predetermined delay time until all bursts specified have been acquired Multiple bursts are stored in a single file Remote Trigger Mode In the remote mode each burst of data may be triggered by a remote signal This will usually be used to synchronize data Acquisition with the scanning device the remote positioning mechanism copyright 1992
67. e data file and may be used to plot magnetic field versus position in the XY plane WARNING AUTO POSITION ACQUISITION IS USED TO INTERFACE WITH THE XY TABLE SCANNER SYSTEM THE SYSTEM WILL LOCK BY ATTEMPTING DATA ACQUISITION WITH NO XY TABLE SCANNER PRESENT PLEASE USE THE DATA ACQUISITION MENU FOR ACQUISITION WITHOUT AN XY TABLE SCANNER copyright 1992 1993 Tristan Technologies 5 11 SMM 1000 System User s Manual Auto Position Acq NDEIO0OO0O0 SYSTEM ace O DIN O O AC Hagnet Indicator Init SQUID Reset Gon Sample RateCHz Samples Positiont 100 On Change Time Delays Interposition Reset SQUIDs off Status Real Time Display O AC Null Reset squIDs Manual Table Control Select File Begin Acquisition Figure 5 4 8 Auto Position Scan MENU 5 4 9 Select Files Pop up MENU The Select Files menu is illustrated in figure 5 4 9 The Select Files Pop up menu is accessed by selecting Select Files from the Auto Position Scan Data Acquisition or XY plot menu For Auto Position Acquisition access the user selects Select Position File and Select Data File prior to data acquisition For Data Acquisition access the user Selects Data File and the Select Position File is optional If the position file is not selecrted a position file is automatically selected by using the las
68. e screen are not readable The measurement program has a utility that converts raw and analysis files to a readable standard text mode The measurement program s XY plot manipulate data and surface modules require the binary mode raw or analysis file These modules do not read a raw and analysis files that have been converted to text mode Raw and analysis files contain a header and data The header contains system parameter information that is pertinent during the data acquisition This header information is similar to the information stored in the startup cfg and system tti files For a raw file the data are the numerical values obtained during the data acquisition For a data acquisition with the AC magnet on the data consists of the SQUID box measurements and the AC magnet amps during each SQUID box measurement For data acquisition with DC only the data consists of the SQUID box measurement for all of the active channels The analysis file contains the processed acquisition data in the same file format as in the raw file copyright 1992 1993 Tristan Technologies 6 3 SMM 1000 System User s Manual One additional class in the raw and analysis file not in the input files is the Last Operation Performed Class The Last Operation Performed Class contains information about what operations were last performed on the file The file may have been post processed several times The history of the post processing operations are contained in thi
69. e top Drop shield down into the stand and replace the stand top plates e Lower probe onto top plates e Start blower CAUTION Probe should not be opened until the stages are at room temperature 4 3 TUNING THE SQUID AND OPERATING THE CONTROL ELECTRONICS Comprehensive instructions for tuning and operating the SQUID electronics may be found in the MODEL 5000 DC SQUID CONTROLLER OPERATOR S MANUAL which has been included with this system For expedient sake we are providing the following section as a quick setup procedure Any questions and detail operations please refer back to the Squid Controller operator s manual The basic procedure steps are copyright 1992 1993 Tristan Technologies 4 3 SMM 1000 System User s Manual Comment RLZ1 Page 3 Turn the power on for the SQUID controller do the autotuning of the Squids and verify the variable setups The SQUID controller variables should all have the proper settings as it did from the manufacturer Users should still verify them to make sure it suits their particular test environment copyright 1992 1993 Tristan Technologies 4 4 SMM 1000 System User s Manual Turn Power ON by pressing the white POWER button It will go through power on self test Once finished it will be in the Status Display screen Push TUNE key 2 times If the tuned value is Good it will proceed back to the Status Display screen If the Tuned value is Baa it will stay in
70. ecome obvious in one of two ways The helium evaporation rate will increase during normal operation If the evaporation rate has increased by more than 30 you should consider repumping the vacuum space You will be unable to transfer liquid helium All of the helium transferred into the dewar will immediately evaporate If the vacuum is extremely poor the outside of the dewar may get cold and even condense water especially along the tail CAUTION CARE MUST BE TAKEN IN THE USE OF THE CRYOLAB DEWAR VALVE IT IS VERY DIFFICULT TO TELL IF THE VALVE IS DISENGAGED OR NOT IT IS BEST TO PULL THE BODY UPPER OFF WHILE KEEPING THE PISTON EXTENDED I E CLOSED BEFORE REMOVING THE VALVE BODY If you suspect a poor vacuum use the following procedure to check and pump on the vacuum CAUTION EXTREME CAUTION MUST BE USED WHEN EXAMINING THE VACUUM THERE ARE MANY FINE LAYERS OF SUPERINSULATION IN THE VACUUM SPACE RAPID CHANGES IN PRESSURE MAY CAUSE RUPTURING OF THE SUPERINSULATION THEREFORE NEVER ABRUPTLY OPEN THE DEWAR VACUUM SPACE TO ATMOSPHERIC PRESSURE THE DEWAR VACUUM SHOULD BE SLOWLY VENTED OVER A PERIOD OF ABOUT 15 MINUTES THE HELIUM RESERVOIR MUST ALWAYS BE AT ROOM TEMPERATURE WHEN GAS IS ADMITTED TO THE VACUUM SPACE OR WHEN IT IS BEING PUMPED The dewar is equipped with a vacuum space evacuation valve mounted on the dewar top Before opening this valve a leak tight connection should be made to it and the pumping line to t
71. ection The MDAC s affect how much AC flux is introduced into the SQUID input circuit to cancel the AC signal from the magnet The In Phase MDAC controls the amplitude of the AC flux and the QUAD is the out of phase AC flux Selecting Null All causes the AC null algorithm to be executed for all installed SQUID channels Selecting SQUID Reset immediately causes all installed SQUID channels accessed through the SQUID controller to go into reset for 1 second A SQUID channel is selected by choosing the appropriate radio button control The NULL UP and DOWN controls for the IN Phase or Quad MDAC apply to the selected SQUID channel Only one SQUID channel may be selected for a NULL UP or DOWN control The User Interface does not allow selection of channels that are not installed in the system Selecting NULL causes the AC null algorithm to be executed for the SQUID channel and MDAC selected After the NULL of the AC field Volts RMS of the SQUID channel vs MDAC settings is then plotted to the SQUID channel plot window Selecting UP causes the MDAC setting in the Tristan NCU box to be incremented until UP is selected again Selected DOWN causes the MDAC setting to be decrement until the same DOWN is pushed again The MDAC settings may be explicitly set by typing a value into the displayed control numeric window for each MDAC These numeric windows also contains the current settings for all the MDAC s Selecting the Plot SQUID
72. ents Corporation TM microPREAMP and QUANTUM DESIGN are trademarks of QUANTUM DESIGN Inc WAVETEK is a trademark of Wavetek Corporation copyright 1992 1993 Tristan Technologies ii SMM 1000 System User s Manual Table of Contents Table of Contents sii en Hate he ne Han ee Bas Hate Haine mn ta ee iii List of figures Vi WARRANTY eee Vi Chapter 1 Introduction 1 1 1 1 SYSTEM OVERVIEW 1 1 1 1 CRYOGENIC SQUID CHIP ow eects 1 4 1 2 COMPUTER CONTROL AND DATA ACQUISITION 1 5 1 2 1 Computer Hardware eee wanen 1 5 1 2 2 Custom Software 1 5 1 2 2 1 AC Field Control 1 5 1 2 2 2 DC Field Control PO LL 1 2 2 3 SQUID Control iii 1 5 1 2 2 4 gt Heater Control asana Havens wate ean eave RRQ WANA baad RE 1 6 1 2 2 5 Interface to Automated Motion Control 1 6 1 2 2 6 AC Signal Nulling eee 1 6 1 2 2 7 Automated Data Acquisition Procedures 1 6 1 2 2 8 Data Analysis Functions 0 00 cece eee cece sentence teeeeeseeeeeeneas 1 7 1 2 2 9 Data Plotting Functions 1 7 3 MAGNETIC FIELD SYSTEM 1 8 1 3 1 DC Field 1 8 1 4 Control Console ss 1 10 1 7 MEASURED PARAMETERS AND FACTORY TEST DATA 1 11 1 7 1 Syst m d tails inei aneia we 1 11 Chapter 2 SAFETY PREGCAUTIONS sii
73. er control boxes are locked out until the acquisition has been completed or aborted Remote mode AC data acquisition user interface selections suggested For those systems supporting a position control system the computer can connect to this position system via a digital input output signals through the PC Lab module The digital signals will remotely control the position stage according to the position file set up The sequence to use the remote mode is as follow 1 Set the appropriate AC magnet frequency AC magnet amplitude and SQUID controller ranges These controls are all accessed by using the System Setup pull down menus 2 Turn on the position system Activate the position system digital lines to the acquisition computer and move to the starting acquisition position 3 Perform an AC null by selecting AC null from the AC null pull down menu 4 Select the Data Acquisition pull down menu Set the trigger mode to Remote Choose the Select Files control From the Select Files menu select a Create a position file that contains the same position information as the position system programmed movement b Select that created position file c Select the data file name to store the acquired data and position coordinates 5 Set the appropriate time delays by selecting Change Time Delays The time delay occurs after the OK to move digital output line is set LOW by the acquisition computer and before data acquisit
74. f Y The number of increments the Table scanner moves in the Y direction Num of Positions This is a read only control The number of positions is gotten by multiplying the Num of Y Num of X Sweep Mode The manner in which the table scanner moves A Serpentine movement resembles a back and forth sort of movement A raster movement resembles the movement of the CRT gun For a demonstration of these movements try each sweep setting Units The distance units used by the table scanner This control selects which unit gets written to the position file comment line Adding the units to the comment provide the user a way of record keeping his units and are not used by the NDE in any other way Step Plot Plots one position at a time for the entire number of positions Create Position File Creates the parameterized position file Read Position File Reads a user selected file into the plot window and loads the controls X start Ystart Num of X Num of Y X inc Yinc and rotation angle with the appropiate values Rotation Angle The trace is rotated by this angle with respect to the starting point The normal sequence of control parameter selection for writing a position file is 1 Choose the appropriate X start X inc Num of X Y start Y inc and Num of Y control parameters 2 Choose the appropriate Sweep Mode The sweep mode refers to motion pattern of the table scanner head For most cases the default Serpentine expres
75. g The manual scaling parameters are modified by selecting Modify Manual Scale for N Axis Modify Manual Scale for N Axis Selecting this control causes the Enter Manual Scaling Menu illustrated in figure 5 4 25 to appear Manual Scaling Manual Scale Y Axis O Manual Scale X Axis O Modify Manual Scale for Y Axis O Modify Manual Scale for X Axist Figure 5 4 25 XY Plot Manual Scaling Pop Up Menu 5 4 26 XY Plot Enter Manual Scaling Pop Up MENU The XY Plot Enter Manual Scaling Pop Up Menu is accessed by selecting XY Plot Pull Down Menu the Modify Scaling control and then the Modify Manual Scale for N Axis The controls on the Enter Manual Scaling illustrated in figure 5 4 26 are used when Modify Manual Scale for N Axis is selected from the Manual Scaling menu illustrated in figure 5 4 25 For the following description the control applies to the appropriately selected X or Y axis copyright 1992 1993 Tristan Technologies 5 27 SMM 1000 System User s Manual Max The maximum numeric value used in plotting The data is clipped for data greater than the max value Note max must be greater than min Min The minimum numeric value used in plotting The data is clipped for data less than the min value Figure 5 4 26 XY Plot Enter Manual Scaling Pop Up Menu 5 4 27 High Speed Acquisition PULL DOWN MENU The High Speed Acquisition is illustrated in figure 5 4 27 Many of the High Speed Acquisition
76. he AC magnet OFF copyright 1992 1993 Tristan Technologies 5 14 SMM 1000 System User s Manual Fiqure 5 4 11 Manipulate Data MENU NOTE FOR DATA COLLECTED WITH NO AC MAGNET THE ANALYSIS SET CONTROL MUST BE SET TO ENTIRE BURST FOR ACCESS TO ANY ANALYSIS FUNCTIONS copyright 1992 1993 Tristan Technologies 5 15 SMM 1000 System User s Manual Algorithm AC Impact Amplitude Processes SQUID data only for a Burst or Cycle For each Burst or Cycle the computer finds the greatest and least SQUID reading The P P Amplitude Greatest SQUID reading Least SQUID reading The P P Amplitude is then written to the output analysis file AC may be ON or OFF The AC data is not processed by the P P Amplitude algorithm If AC is ON the written analysis file contains the P P amplitude of the AC magnet B H Area B H Slope Average Decimate For a cycle or burst calculates the area of the SQUID data vs AC magnet curve Please note the SQUID data is in units of volts and the AC magnet data is in units of amperes For a cycle or burst calculates the slope of the SQUID data vs AC magnet best fit line Please note the SQUID data is in units of volts and the AC magnet data is in units of amperes The Lab Windows analysis library LinFit function call is used For a burst or cycle it averages the SQUID data The samples in a cycle or burst are added up then divided by the number of samples in a cycle
77. he level of the bias current in the SQUID sensor SQUID Triangles Helps to check the quality of the measurement SQUIDs by inputting an AC signal into all of the installed SQUID channels The user then connects an oscilloscope to the Analog Output port on the front of the SQUID controller and looks for a triangular shaped waveform Each channel may be checked by selecting the appropiate Monitor Channel GPIB SQUID command This control is reserved for factory use Sample Rate Hz This control allows the user to set the acquisition rate when acquireing IEEE format data IEEE format data is automatically acquired when using the Data Acquisition or Auto Position Acq menues The sample rate is set in the SQUID controller by copyright 1992 1993 Tristan Technologies 5 4 SMM 1000 System User s Manual 1 Setting the SQUID controller s A D converter rate i e 6kHz 12kKHz 24kHz or 48kHz The A D converter collects the real SQUID data for a single channel The A D converter is multiplexed for all the SQUID channels 2 Setting the SQUID controller s REPF The REPF repeat factor is the number of times the channel list is repeated in the SQUID controller s measurement buffer 3 The SQUID controller then averages the measured data in the buffer for each channel The averaged data is then downloaded to the PC via the GPIB interface Monitor Filter The filtering applied to the analog output port of the SQUID controller Output Voltage Di
78. he valve should be evacuated using a leak detector or a pumping station equipped with a diffusion pump and cold trap or other pumping system with equivalent capability The cold trap is necessary to prevent back streaming of pump oil into the vacuum space after it has reached a low static pressure OPEN THE VALVE VERY SLOWLY AND OBSERVE THE PRESSURE IN THE DEWAR DO NOT BEGIN PUMPING UNTIL YOU OBSERVE THE PRESSURE If you observe a high pressure more than a few Torr you should pump the vacuum space very slowly by opening the valve as little as possible copyright 1992 1993 Tristan Technologies 7 1 NDE 1000 System User s Manual A satisfactory vacuum is about 100 200 millitorr when the whole dewar is at room temperature If it is higher than 500 millitorr it should be reevacuated Depending on the pressure this may take up to 24 hours to obtain a satisfactory pressure WARNING DO NOT LEAVE THE DEWAR PUMPING UNATTENDED Since most of the time required is for outgassing of the surfaces in the dewar it is better to pump the dewar for 15 minutes every few hours There is little advantage to leave the pump connected continuously If your leak detector indicates a high level of helium gas it may be advantageous to flush the vacuum space once with nitrogen gas Slowly fill the vacuum space with 10 Torr of nitrogen gas this should not be done at a rate faster than 1 Torr per minute It should then be re evacuated as described above
79. i VT j FLOAT_TYPE Volt Tesla for L M H range BINARY_read handle amp SYS Squid i mult FLOAT_TYPE multiplyer file_advance_extra_params SYS GEN Sfields 5 handle if CFG GEN S_def_fl amp bit_check bit_check BINARY read handle void amp CFG Sch i VTR INT TYPE BINARY read handle void amp CFG Sch i Ran INT TYPE BINARY read handle void amp CFG Sch i Gain INT TYPE if BINARY_read handle void amp CFG Sch i PLL INT TYPE NO_ERR return ERR_REPORTED file_advance_extra_params CFG GEN Sfields 4 handle end if bit_check lt lt 1 end for return NO_ERR end function static int read_SQUID_global int handle char str 100 advance DATA file to class handle str if strcmp str SSQUID GLOBALS 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED ets BINARY_read handle void amp CFG Sgl num_fields INT_TYPE BINARY read handle void amp CFG Sgl REPF INT TYPE BINARY read handle void amp CFG Sgl ADCR INT TYPE BINARY read handle void amp CFG Sgl DECF INT TYPE BINARY read handle void amp CFG Sgl DTYPE INT TYPE BINARY read handle void amp CFG Sgl DFMD INT TYPE BINARY read handle void amp CFG Sgl BWRF INT TYPE BINARY read handle void amp CFG Sgl CHAN INT TYPE if BINARY_read handle void amp CFG Sgl MONF INT TYPE NO_ERR return ERR_REPORTED fi
80. i file and becomes active when entering the High Speed Acquisition Menu The High Speed acquisition requires the installation of a special Tristan SQUID controller card HIGH SPEED DATA ACQUISITION SQUID channel 100 80 60 40 20 SQUIDS 1 2 3 4 5 6 7 8 Channels O O O O Oa gt SQUID A D Converter Rate Hz2 gt STE KHz 9 20 40 60 80 100 Sample Rate Channel Hz gt 1000 00 Activate Real Time Display Status Samples Burst 100 Motor On Trigger Mode MO Init SQUID Reset Bursts Scant 10 Timed orf i Change Time Delays SQUID Reset Select File Preview Acquisition Begin Acquisition Figure 5 4 27 High Speed Acquisition Pull Down Menu 5 4 28 Convert File to Spreadsheet PULL DOWN MENU Converrt File to Spreadsheet illustrated in figure 5 4 28 is accessed by selecting Conv File to Spread from the utility pull down menu Convert File to Spreadsheet is normally used to convert a binary data or analysis file to an ASCII format that is readable by other spreadsheet or plotting programs For example Microsoft s Excel can read the spreadsheet file created by using this menu Excel s 3d plotting option easily plots the speadsheet file created with the Matrix option of this menu Select File By selecting this
81. ing solutions should be selected carefully to avoid mixtures which can leave a residue that is combustible When combustible type foam insulations are used they should be carefully applied to reduce the possibility of exposure to oxygen enriched liquid which could upon impact cause explosive burning of the foam 2 5 Pressure Relief Devices Must Be Adequately Sized While most cryogenic liquids require considerable heat for evaporation liquid helium has a very low latent heat of vaporization Consequently it evaporates very rapidly when heat is introduced or copyright 1992 1993 Tristan Technologies 2 1 NDE 1000 System User s Manual when liquid helium is first transferred into warm or partially cooled equipment The quenching of a superconducting solenoid or even minor deterioration of the vacuum in the helium container can result in significant evaporation Pressure relief devices for liquid helium equipment must therefore be of adequate capacity to release helium vapor resulting from such heat inputs and thus prevent hazard due to excessive pressure This system has been designed to safely vent the evolving helium gas in the event of any reasonable failure mode WARNING DO NOT MAKE ANY MODIFICATIONS TO THIS SYSTEM WHICH MIGHT AFFECT ITS ABILITY TO VENT HELIUM GAS IN THE EVENT OF AN EMERGENCY SUCH AS LOSS OF VACUUM IN THE DEWAR VACUUM SPACE If transfer lines can be closed off at both ends so that a cryogenic liquid or the rel
82. ion 6 Select Begin Acquisition copyright 1992 1993 Tristan Technologies 5 9 SMM 1000 System User s Manual Femete uni dois 1 e kan Don t take data line emo Uni oving Digital out on Computer Remote j ptional Lu Interburst dela y Lu Interburst delay j it tabilizing t Stabllizing time 3000 017 Remote Mode Acquisition Timing Diagram Figure 5 4 6 2 Remote mode timing illustration 5 4 7 Enter Timing Parameters MENU Selecting the Enter Timing Parameters menu causes the computer to display the panel illustrated in Figure 5 4 7 The Burst Interval control allows the user to select an additional amount of time in seconds between subsequent bursts of data The Initial Delay control is the time in seconds between the initial turning on of the AC magnet and the acquisition of data If the AC magnet is off the Initial Delay is the time in seconds between the selection of Begin Acquisition and data acquisition The Initial Delay parameter applies to all trigger modes and Auto Position acquisition The initial delay applies only to the first burst or position The Interburst Delay parameter is used by timed and remote trigger modes and by Auto Position Acquisition NOTE THE TIMING PARAMETERS HAVE A RESOLUTION OF 55 MILLI SECONDS THE DELAY MUST BE GREATER THAN 55 MILLI SECONDS THE TIMER DELAYS IN STEPS OF 55 MILLI SECONDS copyright 1992 1993 T
83. ion important system information and data acquired are stored in the raw file A raw data file that is processed by one of nde s analysis function s is referred to as an analysis file Organization of Files Contents of input raw and analysis files include parameter and comments Parameters are organized into classes sub classes and fields Classes sub classes and fields are merely concepts used to help organize the parameters and are not used as parameter s in the measurement system A class is a group of parameters that have a common function for example DC magnet information A sub class is a sub group of information within a class such as sub classes DC magnet number 1 and DC magnet number 2 A field is one parameter within a sub class such as the field magnitude of the last electric current in DC magnet number 1 Information about number of classes sub classes and fields are stored within each file This information is necessary to make the future file format compatible with the current file format Future file formats will use the same organization of information into classes sub classes and fields The future file formats will contain the currently specified parameters and will add additional parameters By using classes sub classes and fields raw and analysis files created with the current measurement system can be used by future revisions of the program nde Addi
84. ior to the AC magnet activation is shut off The Status control displays the current state of the system If the user interface is active the Status control displays Idle and when acquireing data the Status control displays Acquireing Data for burst NOTE TO ABORT THE DATA ACQUISITION PRESS ENTER ON THE KEYBOARD DURING DATA ACQUISITION THE MOUSE IS SHUT OFF DURING DATA ACQUISITION Selecting the Real Time Display control displays a graphing panel above this panel When a burst of data is acquired the graphing panel then graphically displays the acquired data Selecting the Select File control causes the Select Files pop up panel Section 5 4 9 to be displayed The program does not allow any data to be acquired without first selecting a data file name If no position file is selected the position file is automatically selected by using the last position file selected That position information is stored in the data file as the data is acquired The position file contains X Y coordinates of the probe tail position relative to the sample being tested The position file selection sets the Samples Bursts parameter to the number positions in the position file NOTE THE USER MAY SELECT MANUAL TABLE MOVE FROM THE UTILITY PULL DOWN MENU FOR CONTROL OF THE TABLE SCANNER copyright 1992 1993 Tristan Technologies 5 8 SMM 1000 System User s Manual Subsequent to Data Acquisition the user interface paramet
85. isplay the panel illustrated in Figure 5 4 15 None of the Heaters are activated until the Activate control is selected The user selects the heaters to be activated by selecting from the Other Heaters and SQUID Sensor Heaters controls The heaters accessed via the SQUID controller correspond to the SQUID Sensor heater controls The heaters accessed via the NCU correspond to the Other Heaters controls The NCU Relays are accessed via the Relay section of this menu The Seconds Active numeric control corresponds to the number of seconds the heater switches are On after the Activate control is selected The CLEAR ALL HEATERS clears the user interface control by shutting off the displayed activated controls Please note the CLEAR ALL HEATERS control does not shut off the heaters this control only clears the user interface Figure 5 4 15 Heater and Relay Control MENU 5 4 16 Function Generator Control PULL DOWN MENU Selecting the Function Generator Control pull down menu causes the computer to display the panel illustrated in Figure 5 4 16 The AC Magnet Indicator light indicates the current state of the NCU oscillator on or off The following describe the user interface controls AC ON Turns on the AC magnet The TRISTAN NCU AC magnet relay is turned on If the NDE system is configured with a Wavetek function generator the the appropiate sinusodial frequency and amplitude are set and the waveform is executed If the system is configu
86. j DOUBLE TYPE BINARY_read handle void amp SYS SCAN pulse_width j DOUBLE_TYPE file_advance_extra_params SYS SCAN num_params 5 handle return NO_ERR end function static int read_COIL int handle char str 100 advance DATA file to class handle str if stremp str COIL INFO 0 ERROR handle FILE READ ERR NO ADD ERR return ERR REPORTED BINARY_ read handle void amp SYS COIL num params INT TYPE file advance extra params SYS COIL num params 0 handle return NO_ERR end function static int read DEWAR int handle char str 100 advance DATA file to class handle str if stremp str DEWAR INFO 0 ERROR handle FILE READ ERR NO ADD ERR return ERR REPORTED BINARY_read handle void amp SYS DEWAR num params INT TYPE file advance extra params SYS DEWAR num params 0 handle return NO_ERR end function static int read RELAY int handle copyright 1992 1993 Tristan Technologies 6 22 SMM 1000 System User s Manual char str 100 int i num heaters j advance DATA file to class handle str if stremp str RELAY REFERENCE 0 ERROR_handle FILE READ ERR NO ADD ERR return ERR_REPORTED if BINARY_ read handle void amp SYS GEN Relay fl INT_TYPE NO_ERR return ERR_REPORTED BINARY_read handle amp SYS GEN Rfields INT_TYPE read the num of params if SYS GEN Rfields gt 0 num_heaters
87. le Allows the user to plot a position file The position file name is prompted for and then plotted to the Channel plot window Restart Allows the same selected file to be plotted from the beginning of the data set Plot Next Data Set activates the plotting for the next data set Channel Selects the SQUIDs or AC magnet plot channels Offset Adds this value onto the channel data before plotting Reverse Polarity multiplies the plotted data by 1 Modify Scaling Allows the user to set the axis scaling by inputting maximum and minimum values for the X and Y axis Selection of this control causes the computer to display the menu illustrated in figure 5 4 27 with the appropriate controls for manual scaling Modify Labels Allows the user to modify the axis labels Selection of this control causes the computer to display the menu illustrated in figure 5 24 26 Print Scale 90 prints on 90 of the page Full uses the entire page copyright 1992 1993 Tristan Technologies 5 19 SMM 1000 System User s Manual Grid allow the user to put a grid on the plot screen Zoomin Allows the user to zoom in on the plotted data The zoom in parameters are defined by the mouse cursors visible in gray on the plot screen Zoom Out Zooms out to the parameters previously defined by Zoom In This option may not be used to make the plot window larger than the data To make the plot window larger than the data use ma
88. le advance extra params CFG Sgl num fields 8 handle return NO ERR ii 7 end function copyright 1992 1993 Tristan Technologies 6 19 SMM 1000 System User s Manual static int read SERVICE HISTORY int handle char str 100 advance DATA file to class handle str if stremp str S SSERVICE HISTORY 0 ERROR handle FILE READ ERR NO ADD _ERR return ERR_REPORTED str 0 INO SYS SER_HIS num_lines 0 while str 0 if BINARY read handle str STRING TYPE NO_ERR return ERR_REPORTED if SYS SER_HIS use TRUE amp amp SYS SER HIS num lines lt 50 strcpy SYS SER HIS buffer SYS SER HIS num lines str is _ class found FALSE strcpy class name no class return NO_ERR end function static int read HEATER REF int handle char str 100 int i num heaters j advance DATA file to class handle str if stremp str SHEATER REFERENCE 0 ERROR handle FILE READ ERR NO ADD ERR return ERR_REPORTED if BINARY_read handle void amp SYS GEN Heat_f1l INT TYPE NO_ERR return ERR_REPORTED if is_ class_found FALSE BINARY_read handle amp SYS GEN Hfields INT TYPE read the num of params if SYS GEN Hfields gt 0 amp amp is_ class_found FALSE num_heaters count_channels SYS GEN Heat_f1l for i 0 i lt num_heaters i if BINARY_read handle void SYS Heat i descr STRING_TYPE NO_ERR return ERR_
89. ly loaded into memory and is written to the input file at the end of the DC FIELD Ramp process The new value stored as the last DC magnet amps in the input file is the Enter DC Magnet Amps 5 4 3 SQUID Control PULL DOWN MENU Selecting the SQUID Control pull down menu causes the computer to display the panel illustrated in Figure 5 4 8 Each control corresponds to a setting on the SQUID controller Please see the SQUID controller manual for a more complete description of the control titles Range Sets the sensitivity of the measurment in terms of flux quanta The range indicates the maximum flux quanta the SQUID channel can measure Gain Sets the gain on amplifiers that feed the anti alias filters Null Mode This command allows the user when to activate the null algorithm The null algorithm consists of nulling the output of the channel to zero volts by use of the offset D A converter after a momentary reset The possible Null Modes are OFF MAN and AUTO If MANual is selected the null algorithm is activated after a SQUID reset If AUTO is selected the null algorithm is activated subsequent to a SQUID reset or when the voltage exceeds the discriminator voltage Null Activate The null algorithm is activated for the selected channel Offset Offsets the current injected into the channel Tune Activate Adjusts the maximum BIAS current of the SQUID sensor to obtain a maximum amplitude of response from an input signal Bias Sets t
90. mber of parameters NDE Customer Name 6 AUG 93 Ship Date 6 AUG 93 SYSTEM TTI file write date 13 207 SYSTEM TTI file write time XXXXX Serial Number 33 Computer clock speed 5 Mouse interrupt number 0 The Max Analog in Channels 12 0 Helium Cal number 7 5 15 number of classes WAVETEK AC magnet oscillator source NCU or WAVETEK NEW Use OLD or NEW NCU commands 30000 lbytes in software cash 40 to 64k 0 0 sample time fudge factor 0 001 plotting sample time fudge factor channel 1 9 lburst time fudge factor 4 SQUID controller Binary Acquisition Channel NONE AT6400 or NONE motor driver NONE NONE or FIELDTEK encoder YES INCU installed YES or NO YES Wavetek installed YES Lab PC installed YES Kepco installed DC5000 DC5000 or NONE SQUID box YES GPIB installed 52 lacquisition re do railed value 35 0 lHelium level min for DC ramp 2 0 AC max Amps 10 0 DC max Amps FACTORY USER or FACTORY VERSION NO Shut SQUID box display off during acquisition NO ARE THERE CALIBRATION TABLES for fieldtek SDC Magnets 1 2 3 Number of magnets in this system copyright 1992 1993 Tristan Technologies 6 4 SMM 1000 System User s Manual 18 251 04025 0159 o GO OGO ES Oo Un EN 04025 100167 Oo OOOOOOO0DO0 o out H 04025 00272 OOOOOOOODOOHOONNKUWNHKOOOOOOOOOH HPOONHKWNKNJNINNNNHHE RR OO 2000000000 w N AC Magnets co 2D 00 0 0000175 SSQUIDS 1273
91. mode 2 CFG samples burst 5 CFG number of bursts 0 00000000 CFG burst interval 0 00000000 CFG initial delay 100 0 CFG Squid frequency 2 raw file samples burst SDC MAGNET class 1243 SYS DC magnets available 18 SYS number of available parameters 125 3 CFG DC magnets defined 2 CFG number of defined parameters 0 0 CFG DC magnet amps copyright 1992 1993 Tristan Technologies 6 9 SMM 1000 System User s Manual 07 15 1993 11 12 39 251 0159 04025 0 0 HOUBRIJINNNN ERRHHOO 20000000 0 0 m 0 0 07 15 1993 11 12 39 29 L 0 00167 04025 0 000000 00o 0 HOUR OOOOOO000OohHO 0 x 0 0 07 15 1993 11 12 39 254 00272 04025 SO00000000H oOO 20000000 0 3 0 8 SAC MAGNET 4 NOW H 0 25 0 75e 005 SMDAC GLOBALS 2 7 copyright 1992 1993 Tristan Technologies 6 10 SMM 1000 System User s Manual CFG SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS SYS CFG CFG SYS SYs SYS SYS SYS SYS SYs SYS SYS SYS SYS SYS SYs SYS SYS SYS SYS SYS CFG CFG SYS SYS SYS SYS SYS SYS SYS SYS SYs SYS SYS SYs SYS SYS SYS SYS SYs SYs Time of last DC field change amps volts comversion Tesla volts at tail resistance conversion error volts for DC ramp DC ramp rate DC ramp rate DC ramp rate DC ramp time delay DC ramp time delay DC ram
92. mponents are included with this system Please check carefully when unpacking the equipment to verify that everything is located We recommend that you save the shipping crates for possible future use in case the system has been damaged and needs to be repaired Quantity Description Custom Designed SQUID Magnetometer Probe Custom Designed Liquid Helium Dewar MODEL 5000 de SQUID CONTROL Quantum Design MODEL 500 de SQUID multiCARD installed in MODEL 5000 microPREAMP with cable to connect MODEL 5000 to Probe Miscellaneous Accessories System Instruction Manual DC SQUID Electronics Instruction Manual Quantum Design Indexer and Driver Manuals A D Board Manual Philtec Specifications Control Console Pump Down and Warm Up Station Probe Crane Probe Stand Optical Microscope w stand Lab Jack Position Sensor Cable Motor Cable X Y Stage Extension Cable GPIB cable 6 Level Meter Cable 15 486 PC ref 1 2 1 M HU RU A US A RU A A US A A A A pani 8 D QD 4 4 adi 3 4 System Assembly Dewar Dewar is mounted in the dewar stand via the rubber shock cords provided The support rings on the dewar are aligned normal to each side of the dewar stand A shock cord attaches from each middle support ring to the two adjacent eye bolts in the upper corners of the dewar stand Four additional shock cords are stretched between the lower eye bolts on the dewar stand and attached to the lower dewar support rings via S hooks The
93. mprised of a collection of objects such as menu bars panels pop up panels and controls Please see the Lab Windows User Interface Library Reference Manual for a complete description of the user interface objects and operation IMPORTANT Any data entry must be followed by a lt RETURN or the values will not be used even though the values are shown on the screen This is a limitation of the LAB WINDOWS environment The DC fields are limited by 20 Amps The AC by 5 Amps The maximum SQUID sample rate is about 250 Hz The slowest continuous SQUID sample rate is about 10 Hz The AC magnet maximum frequency is about 200 Hz Please note a 200 Hz AC magnet frequency is a gross under sample of AC data with a SQUID sample rate of 300 Hz NDE software warns the user if fewer than 10 samples per AC magnet frequencies are sampled The maximum field that can be acquired plotted or analyzed has a limitation of 8000 entries per burst The entire data file may have more than 8000 samples The file size is only limited to the size of the hard disk 5 2 MENU BARS AND HARDWARE CONFIGURATION Figures 5 1 and 5 2 illustrate the menu bars associated with the program NDE Subsequent to the program s initialization a menu bar appears on the screen If initialization with hardware is selected PC communication to the system hardware configuration is establisted Current software supported hardware configuration options include 1 SQUI
94. ng manual scaling only Axis Step The displayed axis step value on the contour or surface plot The step value determines the number of displayed divisions on the X and Y axis These parameter are used during manual scaling and when the On Off switch is ON User Eye X Y and Z position of the user eyeball position for viewing the displayed surface Label The labels that are displayed on each axis and the plot title label If the data has a comment that comment is always displayed as one of the titles An additional title may be displayed by entering that title in the Plot Label control copyright 1992 1993 Tristan Technologies 5 32 SMM 1000 System User s Manual Number of Grids This applies to both the X and Y direction This number is used by the surface or contour interpolator For best results a data point should be spaced every 2 to 20 grid cells Too many data points confuse the interpolator and too few result in bad estimates of z interpolated values Perspective The size of the Z axis as compared to the X and Y axis A High perspective displays might display more fluctuations in the data A Low perspective might display less fluctuations but the data appears in perspective to the X and Y axis Multiplier The data multiplier The data multiplier is used most often when plotting Tesla data The multiplier improves the format of the Z axis labels Number of Divisions The number of divisions on the Z axis This contr
95. nual scaling accessed by selecting Modify scaling and re plot the data set Print Screen dumps the entire XY plot menu to the LASER printer Print Graph print the graph only in an enhanced format XY PLOT ORDER OF OPERATIONS During plotting several plotting options may be selected If the plotting options are selected the sequential order of those operations are 1 Volt to Tesla Conversion 2 Take Log10 of the absolute value of the data 3 Offset add offset to data 4 Polarity multiply data by 1 5 Clip for manual scaling A clip consists of setting data greater than the user specified maximum or minimum to the user specified maximum or minimum 6 Plot XY PLOT File Info Channel 1 000e 2 8 000e 1 i 6 000e 1 Y Axis 4 000e 1 2 000e 14 0 000e 0 T T 7 T 9 000 29 000 40 000 69 000 80 000 190 000 x Axis Select File 1 2 3 4 5 6 7 8 ACH a X Axis Data Set k i channel D 0 0 D 0 0 OQ D tiner AC Hagnets One Cycle 0O Lo a z One Burst offset 0 00 0 00 6 00 6 00 0 00 0 00 0 00 0 00 0 090 Gets Reverse Linezr Volts Entire Files posrity O Oo m o o Oo o o Log Tesla One X Tracey Modify Scalingt Modify Labels Print Scale UT Grid O Plot Burst Position Filet
96. ol only appears for a surface plot Number of Contours The number of contours on a contour plot This control only appears for a contour plot Tolerance The precision used for the surface and contour plotter The larger the tolerance the less the precision If GraphiC displays the error message Too few data points try a coarser grid try to reduce the precision by inputting a larger tolerance Significant Digits The number of significant digits to the right of the decimal point used for axis labels Label Size The size of the axis labels in inches Most plots have appropriate label size of 0 1 to 0 3 Scaling Manual uses the axis parameters that include start step and end from the controls displayed Channel Auto Each channel is auto scaled as plotting occurs Global Auto All the channels use the same scaling The scaling is set by using the channel with the smallest minimum and largest maximum File Information and Time Display the file name file size date and time of file creation current date and time on the plot Save Scaling to User File Allows the user to save the current plotting parameters to a file Restore Scaling from a User File Allows the user to restore a plotting parameter file to the current parameters Plot 3d plots using the scaling parameters selected WARNING concerning a SURFACE plot The X User Eye Y User Eye Z User Eye position must be outside the surface plotted The surface size does not appe
97. olution steps per revolution velocity lacceleration lpulse width deceleration class number of parameters class number of parameters class SYS Heater channels number of relay params Relay Description Relay Description Relay Description Relay Description Relay Description Relay Description class number of channels 5 number of parameters 600 lbase address decima 0 card channels address 28 mode O unipolar 128 bipolar 0 57000000 sample time laxis map 1 x 2 y 3 z 560 lbase address decima 0 card channels address 28 mode O unipolar 128 bipolar 0 57000000 sample time 2 laxis map 1 x 2 y 3 z 600 lbase address decima card channels address 28 Imode O unipolar 128 bipolar 0 57000000 sample time 3 laxis map 1 x 2 y 3 z Time sec Squid Data for each Channel AC mag copyright 1992 1993 Tristan Technologies 6 13 SMM 1000 System User s Manual 3 799132e 004 0 000000e 000 1 099542e 001 2 862883e 000 0 000000e 000 1 503999e 001 3 844757e 001 3 225469e 000 6 141329e 001 3 799132e 004 2 984279e 001 6 529338e 001 3 537187e 000 1 218581e 000 4 417495e 001 9 110948e 001 3 793122e 000 1 803810e 000 3 799132e 004 5 781045e 001 1 154887e 000 3 989237e 000 2 360593e 000 7 053424e 001 1 380466e 000 4 122439e 000 2 880148e 000 3 799132e 004 8 214566e 001 1 584275e 000 4 190629e 000 3 354281e 000 9 246160e 001 1 763098e 000 4 192729e 000 3 775515e 000 3 799132e 004 1 0131
98. onversion factor mag 1 Resistance conversion factor mag 1 Volts Tesla at tail MAX SQUID channels please define below Number of SQUID parameters channel Descriptor SQUID 1 Volts Tesla Low SQUID 1 Volts Tesla Medium SQUID 1 Volts Tesla High SQUID 1 acquisition multiplier 1 Descriptor SQUID 2 Volts Tesla Low SQUID 2 Volts Tesla Medium SQUID 2 Volts Tesla High SQUID 2 copyright 1992 1993 Tristan Technologies 6 5 SMM 1000 System User s Manual 0 SQUID3 3mm axial AC 0 SQUID4 3mm axia 3 07e 8 0e 6 0e 6 0 SQUIDS 3mm axial AC 7e 7 0e 6 0e 6 0 SQUID6 3mm axia 3 7e 8 0e 6 0e 6 0 SHEATER REFERENCE 127374757 6 778 DC_Magnet_ 1 Circuit 1 SQUID 1 Circuit 2 SQUID 3 Circuit 3 SQUID 5 Cirkt_ 4 AC relay 1 Circuit 5 DC_Magnet_ 2 DC_Magnet_ 3 MDAC 2 3 rer O1 H H H DH SPOSITION INFO 12 FLOAT LOW AUX1 NO 768 3 re 1 2 SSCANNER INFO on Oo Oo s 7 S 4 9 SWODONDWODON FPOPFNOFPORPENOND gt Oo SCOIL INFO 0 SDEWAR INFO l acquisition multiplier 2 Descriptor SQUID 3 Volts Tesla Low SQUID 3 Volts Tesla Medium SQUID 3 Volts Tesla High SQUID 3 lacquisition multiplier 3 Descriptor SQUID 4 Volts Tesla Low SQUID 4 Volts Tesla Medium SQUID 4 Volts Tesla High SQUID 4 lacquisition multiplier 4 Descriptor SQUID 5 Volts Tesla Low SQUID 5 Volts Tesla Medium SQUID 5 Volts Tesla High SQUID 5 lacquisition
99. or burst respectively Operates on the entire data set The burst data is truncated at the end of the burst if there are insufficient samples in a burst to define a group of samples for decimation The decimate data operation is performed on the SQUID and AC magnet data The user specifies SAVE 1 out of lt user specified gt data samples The user specified number of data samples indicates the denominator of the fraction of data to save The numerator of the fraction of data samples to save is always 1 For example the user specifies SAVE 1 out of 3 data samples This means for each 3 data samples 1 data sample is saved to the output analysis file This SAVE 1 out of 3 data samples effectively reduces the amount of data by a factor or 1 3 AC must be ON The written analysis file contains a dummy entry for the AC magnet Data not completing a AC magnet cycle is not processed The burst area calculation is the total area of all the cycles with incomplete AC cycle data not included in the calculation AC must be ON The written analysis file contains a dummy entry for the AC magnet AC may be ON or OFF The AC data is not processed by the Average algorithm If AC is ON the written analysis file contains a the average for the AC magnet data May operate on both SQUID and AC data AC may be OFF The AC data written to the analysis file is real decimated data copyright 1992 1993 Tristan Technologies
100. ore Default Parameter File causes the program to load the default input file STARTUP CFG into the current parameters This file load erases any system parameters the user might have changed via the user interface When the user selects Save Params as Default Parameter File the current system parameters are stored in the STARTUP CFG file When Restore User Parameter File is selected the user is asked to type in a file name After copyright 1992 1993 Tristan Technologies 5 5 SMM 1000 System User s Manual the file name is typed in that file is used as the input file and read into the computer s system parameter s When Save Params in a User Parameter File is selected the user is asked to type in a file name The current system parameters are then stored in that user selected file Fiqure 5 4 4 System Parameter Menu 5 4 5 AC Field Null PULL DOWN MENU Selecting the AC Field Null pull down menu causes the computer to display the panel illustrated in Figure 5 4 5 AC Field Hull HDACS 100 SQUID Channel In Phase Quad Range a0 ae ET p o 20 9 9 60 i 20 E 0 EE 5 4 0 o 9 SEH a 3 20 5 O 0 6 o D k k EE 9 20 40 60 80 100 7 0 Magnet Current or MDAC setting PT Le as pal pi Range copyright 1992 1993 Tristan Technologies 5 6 SMM 1000 System User s Manual Figure 5 4 5 AC Field Null MENU This menu aids in manual AC Field Null and allows for AC Field Null with one control sel
101. own menu titles consist of AC field setup DC Magnet Ramp SQUID Control System Parameter AC Field Null Data Acquisition Auto Position Acq Manipulate Data High Speed Acquisition XY Plot 3 D Plot SQUID Control Status GPIB Help Heater Relay Control Function Generator Control Helium Level Save System State Check PC Memory Convert File to ASCII copyright 1992 1993 Tristan Technologies 5 2 SMM 1000 System User s Manual Convert Header to ASCII Convert ASCII to File Dummy Output File Create Position File Manual Table Move and Convert File to Spreadsheet Selecting one of these titles causes the computer to perform some action directly or display a panel Most of descriptions below ntt manualument the user interface portion of NDE with the exception of the Manipulate Data section that describes each analysis algorithm used in processing NDE data 5 4 1 AC Field Setup PULL DOWN MENU Selecting the AC Field Setup pull down menu causes the computer to display the panel illustrated in Figure 5 4 1 This menu only applies to systems with an AC magnet The AC Magnet signal may be generated by the Tristan NCU The control boxes on this panel allow the user to set the electric current the frequency and to turn on or off the AC magnetic field during data acquisition The panel s AC Magnet Control control does not instantly turn on the AC magnet this switch only sets a flag in the program indicating that the AC magnet is on during dat
102. p time delay DC ramp time delay DC ramp time delay DC ramp time delay LABPC board number LABPC to Kepco on sense LABPC to Kepco amps sense LABPC to Kepco driver DC magnet heater channels DC magnet amps Time of last DC field change amps volts comversion Tesla volts at tail resistance conversion error volts for DC ramp DC ramp rate DC ramp rate DC ramp rate DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay LABPC board number LABPC to Kepco on sense LABPC to Kepco amps sense LABPC to Kepco driver DC magnet heater channels DC magnet amps Time of last DC field change amps volts comversion Tesla volts at tail resistance conversion error volts for DC ramp DC ramp rate DC ramp rate DC ramp rate DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay DC ramp time delay LABPC board number LABPC to Kepco on sense LABPC to Kepco amps sense LABPC to Kepco driver DC magnet heater channels terass SYS SYS CFG CFG CFG CFG CFG SYS SYS SYS SYS AC magnets available number of available parameters AC magnets defined number of defined parameters AC amps AC freq AC ON OFF flag Lab Pc card pin Amp Volt conversion Resistance conversion Tesla Volts at tail class CFG CFG number of parameters global range 21 MDAC CHANNELS 12 3 127374757 6 778 884 2999
103. pos file coordinates NONE or X Y NONE store transducer coordinates 10 number of X trace positions 0 00000000 XY trace angle of rotation 5 00000000 Optical peak volts 6 1 5 EXAMPLE RAW DATA ACQUISITION FILE TRISTAN OUTPUT FILE TRISTAN ID Dk VERSION NUMBER SGENERAL INFORMATION class one 32 SYS number of parameters C NDEWORK NDEDATA DUM dat data file name 09 28 1993 current date 0 33 31 current time C NDEWORK NDEDATA DUM dat raw file name 9 total number of classes example data file luser comment NDE SYS customer name 6 AUG 93 SYS ship date XXXXX SYS serial number OSC 1 WAVETEK 0 NCU 0 SYS max analog in 33 SYS computer clock speed 5 SYS mouse interrupt 2 0 SYS Helium Ca 30000 software cash size 0 00000000 sample time fudge 0 00100000 plot sample time fudge 90000000 lburst time fudge Fi SQUID Controller Binary Acq Channel NONE AT6400 or NONE motor driver NONE INONE encoder YES INCU installed YES Wavetek installed YES LAB PC installed YES KEPCO installed DC5000 SQUID controller YES GPIB installed Died acquisition railed err value 35 00000000 helium level min for DC ramp 5 00000000 Maximum AC magnet current 10 00000000 Maximum DC magnet current FACTORY USER or FACTORY program NO SQUID box off during acquis NO CAL tables for POSITION transducer SGENERAL ACQUISITION class 9 CFG number of parameters 1 2 3 ICFG SQUID flag 0 CFG analog in flag Timed CFG acquisition
104. probe slightly and install the plexiglass shield around the probe Connect the shield to the counterweighted shield cable e Lift probe and shield with crane until probe will clear the top ofdewar lt e Insure that all clamps on the dewar are aligned outward to allow the shield to clear e Remove dewar plug and quickly position probe over dewar Lower probe until shield is in place e Taking care that the probe is centered and not stuck slowly lower into the dewar e When probe is down all the way lift the shield and remove the probe cable The shield may then be placed in the warmup stand e Rotate probe to desired orientation and tighten the six probe clamps e Connect all cables to the top of the probe These cable are Level meter 4 pin Motor lines 26 pin Position sensor lines 8 pin Three SQUID connectors 9 pin Thermometer 10 pin Sample lines 10 pin Magnet lines 10 pin NOOR CO D e Transfer He as required See 4 1 7 Warm Up e Move SQUID chip more than 1 mm away from sample e Remove all cables from the top of the probe e Position shield above probe and attach the probe cable e Loosen all six clamps and rotate to clear shield e Lower shield into position e Holding shield in place raise probe slowly e Once probe is above the dewar position it over the warmup stand Replace dewar plug e Lower probe and shield into warmup stand until probe is just above th
105. ps date and time of DC field current amps date and time of DC field current amps date and time of DC field class four AC magnets defined number of parameters current peak amps l AC freq AC mag state 6 7 SMM 1000 System User s Manual SMDAC globals class five 2 number of parameters 21 number of MDAC samples 7 MDAC global QUAD range SMDAC channels class six 4 24 3 4 5 6 7 8 MDAC channels defined 3 number of parameters 884 lin Phase channel 1 2999 QUAD channel 1 6 Summation Range channel 1 1781 lin Phase channel 2 2242 QUAD channel 2 6 Summation Range channel 2 1707 lin Phase channel 3 2298 QUAD channel 3 6 Summation Range channel 3 2048 lin Phase channel 4 2048 QUAD channel 4 A Summation Range channel 4 2048 lin Phase channel 5 0 QUAD channel 5 7 Summation Range channel 5 2048 lin Phase channel 6 2048 QUAD channel 6 0 Summation Range channel 6 2048 lin Phase channel 7 2048 QUAD channel 7 Summation Range channel 7 2048 lin Phase channel 8 2048 QUAD channel 8 Summation Range channel 8 SSQUID channels class seven PEs E ped OF 148 SQUID channels defined 4 number of parameters L Tesla Volt channel 1 4 Range 1 5s 2 5 3 50 4 500 1 Gain 1 1x 2 2x 3 5x 4 10x 1 SELS 1 1k 2 2k 3 4k 4 16k 5 N0 6 Dect 7 Tune 8 Sense L Tesla Volt channel 2 4 Range 1 5s 2 5 3 50 4 500 2 Gain 1 1x 2 2x 3 5x 4 10x 2 SELS 1 1k 2
106. r SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range 4 CFG SQUID box Gain 4 CFG SQUID box PPL fi SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range 5 CFG SQUID box Gain 5 CFG SQUID box PPL fi SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SYS SQUID Descriptor SQUID acquisition mu CFG Volts Tesla Range CFG SQUID Box Range 6 CFG SQUID box Gain 6 CFG SQUID box PPL fi CFG Volts Tesla Range CFG SQUID Box Range 7 samples ilable ined fined ers ers T 1 Low Wire 1 Medium Wire 1 High Wire tiplyer 1 ter 1 2 2 Low Wire 2 Medium Wire 2 High Wire tiplyer 2 ter 2 3 3 Low Wire 3 Medium Wire 3 High Wire tiplyer 3 ter 3 4 4 Low Wire 4 Medium Wire 4 High Wire tiplyer 4 ter 4 5 5 Low Wire 5 Medium Wire 5 High Wire tiplyer 5 ter 5 6 6 Low Wire 6 Medium Wire 6 High Wire tiplyer 6 ter 6 7 6 11 SMM 1000 System User s Manual CFG SQUID box Gain 7 CFG SQUID box PPL filter 7 CFG Volts Tesla Range 8 CFG SQUID Box Range 8 CFG SQUID box Gain 8 CFG SQUID box PPL filter 8 wo SQUID GLOBALS class 8 CFG number of parameters 0 CFG REP factor CFG AD converter rate CFG Decimation factor CFG data type CFG digital filter mode CFG bandwidth
107. r privers i i i BTOIS 26 i ji hi id costs P Face F pd fl al user conection 1 H ial BTC12 1 i eo I sun CONNECTORS 1 mu 3 Re lb coco pu i a pe E i el Sap LES El lel 3 i REAR VE fod emae toee FI 1 g MAGHET HEATEP i Ho L ve q A R MATE NTGRO21 DWG Figure A 3 4 Probe Wiring Diagram 3 copyright 1992 1993 Tristan Technologies A 9 SMM 1000 System User s Manual 0 4 D Lena ai Figure A 3 5 Probe Wiring Diagram 4 copyright 1992 1993 Tristan Technologies A 10 SMM 1000 System User s Manual A 4 SMM Installation copyright 1992 1993 Tristan Technologies A 11 SMM 1000 System User s Manual
108. red with the NCU oscillator instead of the Wavetek the appropiate sinusodial frequency and amplitude in the NCU is set and executed copyright 1992 1993 Tristan Technologies 5 22 SMM 1000 System User s Manual AC OFF Turns off the AC magnet The TRISTAN NCU AC magnet relay is turned off If the NDE system is configured with a Wavetek function generator the function generator is set of 0 volts DC NCU AC OFF Turns off the AC magnet relay in the TRISTAN NCU The AC magnet is shut off by using this control The Wavetek or NCU onboard oscillator are not affected by this control Freq Hz The frequency of the AC magnet For a frequency change to take affect the control AC off then AC on must be selected If the system is configured with a Wavetek frequencies are continuos If the system is configured with a NCU oscillator the frequencies are discrete In this NCU oscillator case the user interface control allows for only discrete frequency settings Amps peak Sets the amplitude of the AC magnet For a amplitude change to take affect the control AC off then AC on must be selected WARNING Selecting AC ON turns ON the AC magnet and burns helium The AC magnet may accidentally be left ON when exiting this menu Function Generator Control FreqcH29 1 00 Amps Peak AC Hag Indicator Figure 5 4 16 Function Generator Control MENU 5 4 17 Helium Level PULL DOWN MENU Selecting the Helium Le
109. ristan Technologies 5 10 SMM 1000 System User s Manual Figure 5 4 7 Enter Timed Mode Parameters MENU 5 4 8 Auto Position Acq PULL DOWN MENU The Auto Position Acq menu illustrated in figure 5 4 8 is similar to the Data Acquisition menu The following user interface controls work in the same way as discussed in the Data Acquisition menu section 5 4 6 Channel SQUID Channel A D IN AC magnet indicator Real Time Display Sample Rate Change Time Delays AC null Reset SQUID s Select Files and Begin Acquisition The Auto Position Samples Position control has the same functionality as the Data Acquisition Samples Burst control The Auto Position Interposition Reset SQUIDs control has the same functionality as the Data Acquisition Interburst Reset Control Selecting Manual Table Control activates the Manual Scanner Control Pop Up Menu described in section 5 4 25 The binary switch Init SQUID Reset controls the state of the SQUID reset prior to data being acquired The Status control is used to indicate current data acquisition motor movement plotting disk write or idle For example if data is being acquired the Status control displays Acquiring Data Position 1 The Auto Position Acq menu is used when a scanning table is present Manual control of the scanner table is available by using this menu The position file is used to store coordinates and control the position of the XY table scanner The position data is automatically stored in th
110. rolled by an IBM AT compatible computer system including 80486 microprocessor 33 MHz 14 color monitor 1024x768 resolution capability with appropriate software 28mm dot pitch mouse and keyboard 8 MByte memory expandable to 32 MByte 210 MByte hard disk one 5 25 floppy 1 2 MByte one 3 5 floppy 1 44 MByte two digital I O cards with two 20 bit A D inputs IEEE 488 compatible digital communication port two RS 232 communication ports one Centronics compatible 8 bit parallel port one cartridge tape back up 120 MByte compressed capacity MS DOS 5 0 operating system Custom Software for control of all critical system components see below Miscellaneous software utilities for debugging graphing memory management and communication 1 2 2 Custom Software Custom software is supplied that is capable of controlling all critical system components acquiring data from all SQUID channels and analyzing the data to determine the magnetic properties of the sample being tested AC and DC field control requires optional hardware Specific features include 1 2 2 1 AC Field Control Both amplitude and frequency of the sinusoidal ac field applied to the sample are computer controlled The field is automatically turned on and off as required during specific measurements 1 2 2 2 DC Field Control The dc field amplitude and ramp rate is computer controlled A fully automated
111. s class For example raw data is acquired the data is decimated the data has a P P amplitude performed on each cycle and then the data is averaged for each burst Each one of these operation s has a file associated with it The last entry in the Last Operation Performed Class corresponds to the last operation performed on that file For this example the file last written with averaged data would contain the following entries in the Last Operation Performed Class RAW DATA DECIMATED DATA P P AMPLITUDE CYCLE and AVERAGE BURST In the above described manner the Last Operation Performed Class has another entry added every time a post processing operation is completed A maximum of 7 post processing operations are supported 6 1 3 EXAMPLE SYSTEM TTI FILE TRISTAN _SYS_FILE Ziel SService History Tristan id Version number Descriptor for the first class This area in the file is reserved for a sevice history of the system Any modification or service to the system hardware must be logged here Please type in all text before the next and use a standard text editor such as DOS EDIT This history gets written to the data files Data files have gone to version 2 1 80 characters per line The Service History class is limited to 50 lines and DATE DESCRIPTION nde code comments 29 June 92 System startup and initialization 29 March 93 More service history Line required to end Service history General 32 INu
112. s collected per file Begin Acquisition Starts Data Acquisition Please note that a file must be selected to begin acquisition SQUID Reset Resets all the SQUID channels copyright 1992 1993 Tristan Technologies 5 28 SMM 1000 System User s Manual Select File Allows the user to select a data file and position file Preview Acquisition Acquires data without writting to a file for one burst Begin Acquistion Starts the process of acquiring data and writting to a file Change Time Delays Selecting this control display the panel illustrated in figure 5 4 7 Trigger Mode The choices are Motor and Timed If Motor is selected the at6400 stepper motor stopping movement triggers a data acquisition If Timed is selected data acquisition is continuous with only the termination of a interburst delays triggering subsequent data acquisitions Notes on High Speed Acquisition High Speed Acquisition uses binary mode in the SQUID controller Binary mode is associated with raw data from the SQUID controller s A D converter The triggering mode is always Timed Timed has the same meaning as that triggering mode for Data Acquisition Only Scan The GPIB Rate is the rate for a download of each buffer from the SQUID controller This rate is fixed at 100 Hz for high speed acquisition If the AC Magnet is on for data acquisition the NDE obtains the AC magnet data from the SQUID controller The AC Magnet SQUID channel is defined in the system tt
113. ses the Table scanners head type of movement 3 Check the user input control parameters by selecting Step plot 4 After the parameters are correct for the desired Table scanner movement select Write Position File The Table scanner moves in a square or rectangular grid This utility expresses the Table scanner movement in terms of an XY plane All movement is incremented in the X direction for a row then in the Y direction for the next row The movement then fills in a grid by incrementing all Y for each row Each point on the grid corresponds to a measurement by the TRISTAN NDE system This measurement must be at a single position Normally during data acquisition many samples of data are collected at a single position The data is processed by using one of the computer program NDE s burst analysis functions An example of a burst analysis function is slope The slope of the SQUID data vs the AC magnet data is calculated at each position or burst The file generated by the burst analysis function serves as a file used by the TRISTAN 3d plot utility This create position file utility helps the user to generate a position file used by the 3d plot utility and defines the table scanner positions copyright 1992 1993 Tristan Technologies 5 13 SMM 1000 System User s Manual Create Position File Positions Xx start 0 0000 xX inet 0 5000 Y start 0 0000 Y inc 0 5000 Num of Positions
114. sheet file Figure 5 4 28 Convert File to Spreadsheet Pull Down Menu copyright 1992 1993 Tristan Technologies 5 30 SMM 1000 System User s Manual 5 5 3d 3 Dimensional GraphiC program 5 5 1 3d 3 Dimensional PLOT PROGRAM The 3d plot utility is executed by selecting option 2 from the NDE System Batch File Menu utility or executing the program 3drt exe The 3d plot utility contains SURFACE and CONTOUR plots that operate directly on NDE system data and position files The 3d user interface is illustrated in figures 5 5 1 1 and 5 5 1 2 3d provides for a hard copy using the HP Laser Jet printer Section 5 5 4 discusses the various hard copy options The 3d SURFACE and CONTOUR plots use the Scientific Endeavors GraphiC libraries The 3d user interface use the National Instruments real mode User Interface Library The following sections discuss operation of the user interface and shows examples SURFACE and CONTOUR plots All plots use data in the form of X Y Z data points plotted to a right handed rectangular coordinate system The following lists the steps the user may do to create his own SURFACE or CONTOUR plot using the 3d plot utility 1 Acquire data with position information using NDE 2 Analyze the data with a burst analysis function using NDE This analysis is accessed via the manipulate data menu and must be analyzed with burst selected on the control Analysis Set The analysis file is used as the data file for the 3d
115. spheric pressure remove the transfer tube and replace the plug in the top of the dewar 4 2 Mounting Sample e Use four 00 90 screws to mount chip holder to stage e Connect leads to chip holder e Verify all lines below surface e Visually check for flatness and surface cleanliness e Verify that z stage is fully retracted e Using lab jack slowly raise x y stages until seated in support legs CAUTION Watch for x y sensors hitting tilt stage wires pinching under support legs e Snap spring latches in place e Connect x y motor and sample lines e Remove lab jack 2 Verify x y z Motion and Sensors copyright 1992 1993 Tristan Technologies 4 1 SMM 1000 System User s Manual e Connect motor and position sensor lines at top of probe e Down load AT6400 operating system ATSTART e Start NDE software and enter manual table move under utilities e move x 1 mm while moving raise squid chip via spring attachment x motor should shut off Repeat test for x y y z motions 3 Leveling e Move stages x y to positive limit e Define position as 3175 3175 mm e Move to 0 0 e Move z down slowly until z sensor is on front side of optical peak and reading 3v e Define position as z 0 e Move to 2 mm 0 0 and 0 2 mm 0 Record z position voltage each location Both axis e Calculate AVx V X V X AVy V Y V Y e Calculate AZ AV 11 3 um v Calculate turns turns 1018 9 AZ AX e Move Z to
116. splays the value of each SQUID channel s output voltage Please note Sample Output Voltage must be selected to update the display Reset SQUIDs Resets all the installed SQUID channels Heat SQUIDs Turns on the heaters for all the installed SQUIDs The heaters are left on for 10 seconds then turned off Sample Output Voltage Samples the output voltage for all the installed SQUIDs and displays the voltage in the Output Voltage controls Monitor Channel Selectes the SQUID channel output to the SQUID controller s Analog output port SQUID Control SQUID 4 2 3 4 5 6 7 8 ALL Range E Null Activate o o o o o o o o o Tune Activate O o O o o o o o Oo Bias 10 00 10 00 10 00 10 00 10 00 19 00 10 00 10 00 SQUID Triangles O GPIB SQUID Commands Sample RateCHz 0 00000 Monitor Channel Honitor Filter S NONE Output Voltage 0 000 0 000 0 000 o 000 0 000 o 000 0 000 0 000 Reset SQUIDs Heat SQUIDs Sample Output Voltage Fiqure 5 4 3 SQUID Control Menu 5 4 4 System Parameter PULL DOWN MENU Selecting the System Parameter pull down menu causes the computer to display the panel illustrated in Figure 5 4 4 The input file STARTUP CFG is read by the computer program when the program is initially loaded into the computer s memory Selecting the Display Current Parameters control displays another panel containing those system parameters stored in the input file Selecting Rest
117. st executing NDE s menu option Acquire Data and then converting the acquired raw data file to ASCII by executing the menu option Convert File to ASCII 6 1 1 NDE DIRECTORY STRUCTURE Directory PATH listing for Volume MS DOS_5 Volume Serial Number is 1872 746A C NDE NDE bat Batch file for executing NDE 3d bat Batch file for executing 3d read me Readme file NDECODE NDELW EXE 3DCODE CONTOUR PLT SURFACE PLT CONTOUR INP SURFACE INP 3DRT EXE 3D CFG GPC CONFIG GPC EQUIP EXE PRINTER1 PRN FNT DRV DAT TAB COMMON INCLUDE DISPLAY UIR HLP PLOT UIR NDEDATA PARAMS STARTUP CFG SYSTEM TTI copyright 1992 1993 Tristan Technologies 6 1 SMM 1000 System User s Manual 6 1 2 FILE STRUCTURE DESCRIPTION Basic Description An important aspect of the NDE data measurement system are files stored on the acquisition computer s hard disk The computer program nde uses these files to define important information Prior and during data acquisition important information stored in files includes hardware and software initialization parameters parameters important to an individual s experiment system state and system configuration These files used to define the system information prior and during data acquisition are referred to as input files During data acquisit
118. stiin eiria iii r 2 1 2 1 SAFETY PRECAUTIONS FOR HANDLING LIQUID HELIUM AND LIQUID NITROGEN EEE TE a a agan done sense aa E A Nak EN an aa a ET 2 1 2 2 Extreme Cold Cover Eyes and Exposed Skin 2 1 2 3 Keep Air and Other Gases Away from Liquid Helium 2 1 2 4 Keep Exterior Surfaces Clean to Prevent Combustion 2 1 2 5 Pressure Relief Devices Must Be Adequately Sized 0a0ananannenen anan enennananan ananem nenen 2 1 2 6 Keep Equipment Area Well Ventilated 2 2 Chapter 3 INSTALLATION osses 3 1 SAINTHALAINSPEGTIONG 5255 1235 at an San Re ag a een aka anaa aa NANG TRTE 3 1 3 2 REPACKING FOR RETURN SHIPMENT is n 3 1 3 3 SYSTEM COMPONENTS osei wi 3 2 Chapter 4 NORMAL OPERATION sses we 4 1 4 1 REFILLING THE DEWAR WITH LIQUID HELIUM 4 1 4 2 Mounting Sample 4 1 2 Verify x y z Motion and Sensors 4 2 E Ta PEE A a A KEH rend 4 2 If unable to use Z sensor the sample may be leveled via the following DrOC AUFR s eene dont e tE NIN EEE EE E dis ten AA NS NAE 4 2 4 Vacuum Can Assembly sisi awa SAS ANGE NEH UNG NONA and arii NGENAKAKE KKN En 4 2 5 Pump down He purge we 4 2 6 Cool Down 4 3 LL NN AUN ER TR PE aa nana A a te EEE EE PEN Bah ga 4 3 4 3 TUNING THE SGUID AND OPERATING THE CONTROL ELECTRONICS 4 3 Chapter 5 USER INTERFACE iii we 4 1 5 1 BASIC DESCRIPTION 0 0n0anenennan aan ane nean nene wee 4 1 5 2
119. t position file For XY plot access the user selects a data file and the position file selection is optional If a position file is selected the XY plotter uses the selected position file during an X trace plot Selecting Create Position File activates the Create Position File Pop Up Panel described in section 5 4 10 Figure 5 4 9 Select Files MENU 5 4 10 Create Position File Pop up MENU and PULL DOWN MENU The position file create menu is a panel accessed by selecting Create Position File from the Select Files Menu or by selecting the Create Position File from the main menu bar This menu copyright 1992 1993 Tristan Technologies 5 12 SMM 1000 System User s Manual aids the user in the creation of a position file used in 3 D plotting and defining positions for the table scanner The position file contains the XY plane position information See the illustration on Figure 5 4 10 for the menu screen associated with the position file create utility Definition of menu screen control parameters X start The initial X starting position of the table scanner X inc The increment distance of X as the table scanner moves This parameter may be positive or negative Num of X The number of increments the table scanner moves in the X direction Y start The initial Y starting position of the table scanner Y inc The increment distance of Y as the Table scanner head moves This parameter may be positive or negative Num o
120. ted The user may select a position file and that file is used for the X and Y coordinates no matter if the data file contains position information copyright 1992 1993 Tristan Technologies 5 31 SMM 1000 System User s Manual WARNING Position and data file names follow the standard DOS convention The prefix must me no more than 8 characters and the extenuation must be no more the 3 characters A file name must also have a Example of good file names MY_data1 xyz for a position file and MY_data1 avb for a data file Plot Activates the Surface or Contour plotter with channel auto scaling for the selected channels Quit Quits the 3d program 3d Plotting Inputs File Parameters SQUID Channel 2 3 4 5 6 7 8 AC Surfacel Contour Change Plot Parameters Select Data File Select Position File Quit Figure 5 5 1 1 3d Plotting Inputs MENU 5 5 1 2 3d Plot Parameters MENU Selection of Change Plot Parameters control from the 3d Plotting Inputs Menu displays the 3d Plot Parameters menu illustrated in figure 5 5 1 2 Definition of User Interface Controls Axis Start The displayed axis starting value on the contour or surface plot These parameter are used during manual scaling only The start and end values can be used to exclude and include data on the surface or contour plot Axis End The displayed axis ending value on the contour or surface plot These parameter are used duri
121. that screen Value between 20 to 50 are still ok Make sure the initialsettings are correct amp The up downlleft right Range 500 cursor keys can toggle Gain 1x and the channels Filter 1k and Monitor Filter None The decr incr keys can A see footnote on Helium level ae the monitor filter ield For Bad tune results if the value shown is between 20 and 50 it can generally be used If you choose to ignore it just proceed by pressing ESC key Otherwise Push TUNE key three times It will repeat the auto tune process If the tuned result is good proceed to 3 Push TUNE key two times to go to the Tune Setup Screen Use the key to toggle the Heater cycle to YES Push TUNE key one time to go through the heating of SQUID to heat remove trapped flux and tuning the SQUID copyright 1992 1993 Tristan Technologies 4 5 SMM 1000 System User s Manual A Make sure the Helium level is OK Check the Helium Level Sensor screen settings to be the following Helium Level Sensor HE Monitor Disable HE Display ENABLE CALCULATED LEVEL Volts at 0 8 23 or as specified in system tti b Faure es copyright 1992 1993 Tristan Technologies 4 6 SMM 1000 System User s Manual Error Bookmark not defined Chapter 5 USER INTERFACE 5 1 BASIC DESCRIPTION The user interface is the graphical human interaction portion of the program NDE EXE This user interface is co
122. time BINARY_read hand e void raw fname STRING TYPE read raw file name BINARY read hand e void amp num_read_classes INT_TYPE total number of classes BINARY read BINARY read BINARY read BINARY read BINARY read BINARY read andle void user comment STRING _TYPE user comment andle void SYS GEN cust name STRING TYPE cust name andle void SYS GEN ship date STRING TYPE andle void SYS GEN serial num STRING TYPE andle void amp SYS GEN OSC INT_TYPE oscillator source and e void amp SYS GEN MDA INT_TYPE MAX ANALOG IN BINARY read handle void amp SYS GEN CS INT TYPE clock speed BINARY read handle void amp SYS GEN MOUSEINT INT TYPE mouse interrupt if BINARY_read handle void amp SYS GEN Hcal INT_TYPE NO_ERR return ERR_REPORTED Helium Cal if SYS GEN num_fields gt 12 BINARY_read handle void amp dummy LONG TYPE if SYS GEN num_fields gt 13 BINARY_read handle void amp SYS GEN sample_time_fudge DOUBLE TYPE if SYS GEN num_fields gt 14 BINARY_read handle void amp SYS GEN plot_sample_time_fudge DOUBLE TYPE if SYS GEN num_fields gt 15 BINARY_read handle void amp SYS GEN burst_time_fudge DOUBLE TYPE if SYS GEN num_fields gt 16 BINARY_read handle void amp SYS GEN bin_chan INT_TYPE oscillator source if SYS GEN num_fields gt 17 BINARY_read handle void SYS GEN motor_driver STRING_TYPE
123. tionally raw and analysis files created with future revisions of nde may be used by the current versions of nde However current input files may be read by future versions of the program but are not guaranteed to initialize the measurement system in the same way Additionally future input files may be read by the current program but are not guaranteed to initialize the system in the same way Parsing Classes Subsequent classes are marked for the parser with a This informs the parser that the next character read is the beginning of a class definition The must be in the 1st column on the text page Comment lines may be added to files by the This informs the parser that the subsequent information in the file are comments The parser does not assume any additional classes in the file until the next is parsed Input Files Basic Description Two input files are required by the program nde These files must be named startup cfg and system tti and be in the proper file format When the program is first loaded into the computer s memory these two input files are read from the hard disk Initially the file startup cfg contains factory default parameters These default parameters are used by the measurement system except when the parameter s are changed via nde s user interface Startup cfg is written to the hard disk with the current system parameters whenever 1 The user saves startup file 2
124. to File PULL DOWN MENU 4 24 5 4 22 Dummy Output File PULL DOWN MENU 4 24 5 4 23 Manual Scanner Control Pop Up MENU 4 24 5 4 24 XY Plot Labels Pop Up MENU 4 25 5 4 25 XY Plot Manual Scaling Pop Up MENU 4 26 5 4 26 XY Plot Enter Manual Scaling Pop Up MENU 4 26 5 4 27 High Speed Acquisition PULL DOWN MENU ss 4 27 5 4 28 Convert File to Spreadsheet PULL DOWN MENU 4 28 5 5 3d 3 Dimensional GraphiC program 4 30 5 5 1 3d 3 Dimensional PLOT PROGRAM 4 30 5 5 1 1 3d Plotting Inputs MENU vsestr iriti 4 30 5 5 1 2 3d Plot Parameters MENU amengan raaa en abane nan Gen awe ndanani gekne 4 31 5 5 2 CONTOUR PLOT EXAMPLE 4 34 5 5 3 SURFACE PLOT EXAMPLE 4 35 5 5 4 3D HARD COPY OPTIONS i 4 35 5 6 EXTERNAL DOS PROGRAMS eee 4 36 5 6 1 NDE System Batch File Menu Utility 5 7 TYPICAL AC ACQUISITION AND ANALYSIS MENU SELECTION 4 38 Chapter 6 FILE STRUCTURE amp MAINTENANCE eee eects we 5 1 6 1 DIRECTORY STRUCTURE AND EXAMPLE DATA FILE 00000e00nenan anan nenen nana nenen 5 1 6 1 1 NDE DIRECTORY STRUCTURE in 6 1 2 FILE STRUCTURE DESCRIPTION 6 1 3 EXAMPLE SYSTEM TTI FILE wes 6 1 4 EXAMPLE STARTUP CFG FILE oo iii 6 1 5 EXAMPLE RAW DATA ACQUISITION FILE 000000n0n nenen enen anaman nana emanen enene 5 9 6 1 7 NDE PRINTER CONFIGURATION
125. to the data type The data type and the number of bytes are also stored for each parameter The file may be read into the computers memory by reading the number of classes the number of parameters for each class the data type and number of bytes for each parameter Please see section 6 1 2 File Structure Description for definitions of terms used in this section The following illustrates the source code for reading a NDE binary file header and data file static int read_func NUM_OUT_CLASSES int handle amp read GEN INFO amp read GEN ACQ amp read DC amp read AC amp read MDAC global amp read MDAC chan amp read SQUID chan amp read SQUID global amp read SERVICE HISTORY amp read HEATER REF amp read MDAC MAP amp read LAST OP amp read DATA Descriptor amp read POSITION amp read SCANNER amp read COIL amp read DEWAR amp read RELAY int read DATA file header int handle int i read classes char str 100 asc_to bin flag FALSE if BINARY_read handle void str STRING TYPE NO ERR return ERR_REPORTED if strcmp str TRISTAN_OUT_id 0 ERROR handle FILE_READ_ID_ERR NO_ADD_ERR return ERR_REPORTED BINARY read handle void data file ver num STRING TYPE version num DataFileVerNum10 int atof data_ file ver num 0001 10 if strcmp data file ver num version num 0 ERROR handle FILE DATA VER ERR NO ADD ERR if read GEN _ INFO handle
126. turn buckles are adjusted to center level and raise the dewar Crane The crane should be positioned as shown in figure 3 5 1 so that the probe cable is centered on the dewar and the warmup stand Once the position is determined the crane should be bolted to the floor Warmup Pumpdown stand The vacuum pump is installed in the rear of the warmup stand on the metal bracket The vacuum line is attached to the red hose using a hose clamp Power is then connected lines are coded The warmup stand should be located adjacent to the dewar stand on the right hand side with the front surface flush with the dewar stand Once in place the crane power should be connected Console 1Quantum Design San Diego CA USA copyright 1992 1993 Tristan Technologies 3 2 SMM 1000 System User s Manual Position the console to the right of the warmup stand The console should not be touching the warmup stand The AT6400 AUX1 should be mounted behind the computer The temperature controller SQUID controller and electronics box are all mounted in the rack on the left hand side of the console After all components are positioned cabling should be attached Different connector types are used to insure proper installation Figure 3 5 1 Floor Layout copyright 1992 1993 Tristan Technologies 3 3 SMM 1000 System User s Manual Chapter
127. vel pull down menu causes the computer to display the panel illustrated in Figure 5 4 17 Selecting the Read Helium Level control causes the computer to activate the SQUID controller helium level meter for 5 seconds and then display the value in the Helium control A continuous read of the Helium level in the SQUID controller may be executed by selecting the Continuous Helium Check control Each check of continuous check takes approximately 5 seconds of metering time The Fill Rate control is a measure of how fast the helium level is changing The Fill Rate is useful when filling the probe with helium WARNING To shut OFF the Continuous Check control click the mouse on continuous check Off for at least 5 seconds copyright 1992 1993 Tristan Technologies 5 23 SMM 1000 System User s Manual Fiqure 5 4 17 Helium Level MENU 5 4 18 Check PC Memory PULL DOWN MENU Check the amount of RAM memory available to the program for dynamic memory allocation and displays 5 4 19 Convert File to ASCII PULL DOWN MENU Selecting the Convert File to ASCII causes the computer to prompt the user for a data acquisition or analysis file name The file with the file name type in by the user is then converted from file binary mode to a readable ASCII or text mode file The measurement system stores all of its data files in binary This utility provides a means for the user to easily see the processed or raw data in text mode
128. ycle of applied field or for the average of all cycles Amplitude Calculate the peak to peak amplitude of the magnetometer output or any other measured output during a single cycle of applied ac field or during a single burst of data Filter This will apply a low pass high pass or band pass digital filter to the data Other Tools will be provided to simplify the addition of other data acquisition procedures as may be required For example these tools will read and write the standard data file formats 1 2 2 9 Data Plotting Functions A variety of data plotting functions is supplied that can operate on the standard data format This will allow any data file to be plotted in any of the following formats some of these formats may not be meaningful for some of the data files Time Series Plots the data amplitude versus data point X Y Plot Plots the amplitude of one magnetometer function versus AC current Contour Plot Plots the amplitude as a contour plot versus X Y position 3 D Contour Plot Plots the amplitude of a data set versus X Y position copyright 1992 1993 Tristan Technologies 1 7 SMM 1000 System User s Manual DA MWA A F nal NG N al f jz a Vi 2 qu QU ANE P NAN NI uN 4 Au aD E Figure 1 5 Sample surface plot from a scan of a magnetic disk 1 3 MAGNETIC FIELD SYSTEM 1 3 1 DC Field The superconducting magnet on the magnetometer probe is capable of applying

MEL 1000 System User`s Manual Rev A

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