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Magnetic Active

Compensation System (MACS)

MACS/D Series Digital Signal Processor-Based

User Manual

1680736 Rev C

February 2019

Содержание MACS/D Series

Страница 1: ...Magnetic Active Compensation System MACS MACS D Series Digital Signal Processor Based User Manual 1680736 Rev C February 2019 ...

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Страница 3: ...ense under its patent rights nor the rights of others All trademarks are the property of their respective owners Copyright 2019 by ETS Lindgren Inc All Rights Reserved No part of this document may be copied by any means without written permission from ETS Lindgren Inc Trademarks used in this document The ETS Lindgren logo is a registered trademark of ETS Lindgren Inc Revision Record MANUAL PRODUCT...

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Страница 5: ...1 4 2 Grounding the Product 12 1 4 3 Danger Arising From Loss of Ground 12 1 4 4 Use the Proper Power Cord 12 1 4 5 Do Not Operate in Explosive Atmospheres 13 1 4 6 Do Not Remove Covers or Panels 13 2 SERVICING SAFETY SUMMARY 15 2 1 DO NOT SERVICE ALONE 15 2 2 USE CARE WHEN SERVICING WITH POWER ON 15 2 3 POWER SOURCE 15 3 SYSTEM DESCRIPTION 17 3 1 INTRODUCTION 17 3 2 OVERVIEW AND SYSTEM COMPONENTS...

Страница 6: ...llation 37 5 1 2 MACS D Rack Cabinet Location 38 5 1 3 Compensation Coil Installation 38 5 1 4 Compensation Coil Connections to the Rear Interface Panel 40 5 2 SYSTEM FINAL INSTALLATION 41 5 2 1 Initial Onsite Verifications 41 5 2 2 Onsite Setups and Electrical Interconnects 42 5 2 3 Setup Using the WEB UI 43 5 3 FIELD COMPENSATION ADJUSTMENT AND VERIFICATION 44 5 3 1 Setting the Axis Polarity and...

Страница 7: ...YSTEM REPAIR OR REPLACEMENT 51 7 7 PROBE 51 7 8 MACS D RACK CABINET 52 7 9 COIL DRIVER AMPLIFIER CDA 52 APPENDICES 53 A 1 BARTINGTON PROBE SPECIFICATIONS 53 Bartington MAG 03MCT series 53 Bartington MAG 03MCT1000 53 Bartington MAG639 Reserved 53 A 2 1 SUBSYSTEMS MACS D CONTROLLER MXA 54 A 2 2 SUBSYSTEMS COIL DRIVER AMPLIFIER CDA 54 A 2 3 MACS D SYSTEM ASSEMBLED IN RACK CHASSIS SPECIFICATIONS 54 A ...

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Страница 9: ...nual for additional information If the instruction manual has been misplaced download it from ets lindgren com or contact ETS Lindgren Customer Service High Voltage Indicates presence of hazardous voltage Unsafe practice could result in severe personal injury or death High Voltage Indicates presence of hazardous voltage Unsafe practice could result in severe personal injury or death Protective Ear...

Страница 10: ...e servicing contact ETS Lindgren servicing or modifying the unit by yourself may void your warranty If you attempt to service the unit by yourself disconnect all electrical power before starting There are voltages at many points in the instrument which could if contacted cause personal injury Only trained service personnel should perform adjustments and or service procedures upon this instrument C...

Страница 11: ...e to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life 1 2 2 As Marked on Equipment CAUTION indicates a personal injury hazard not immediately accessible as one reads the markings or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one reads ...

Страница 12: ...grounded through the grounding conductor of the power cord A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation 1 4 3 Danger Arising From Loss of Ground Upon loss of the protective ground connection all accessible conductive parts including knobs and controls that may appear to be insulating can render an electrical shock 1 4 4 Use the ...

Страница 13: ...duct covers or panels unless qualified to do so Do not operate the product except for installation setup calibration by qualified personnel or place this product in permanent operation without the covers and panels properly installed Australia China New Zealand Argentina 3 blade 240V Israeli 3 pin blade 220V Swiss 3 pin 22V Danish 3 pin 220V Table 1 International Power Connector Voltage Identifica...

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Страница 15: ...A C mains voltages exist at several internal points in this product To avoid personal injury do not touch exposed primary circuit connections or components while power is on Disconnect power before removing protective panels soldering or replacing components 2 3 POWER SOURCE This product is intended to operate from a power source of either 100 120 volts 50 60 hertz that does not apply more than 13...

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Страница 17: ...ic MRI magnet modeling data may be incorporated in MACS D ACR system to provide an additional measure of isocenter interference cancellation improvement For EMFC applications the digital processor provides additional free space compensation within the Protected Volume PV while ACR capability permits optional offsetting of the point of optimal field cancellation when interfering signal gradient or ...

Страница 18: ... interference frequency spectra appearing within the MACS D system s passband approximately 1mHz 500 Hz configured with standard probe extended high frequency options available and constant attenuation coefficient for any interference spectra within the system passband Constant attenuation applies regardless of spectral amplitude for the wide range of signal amplitudes within the system s dynamic ...

Страница 19: ... D system enables the precise tailoring of filter characteristics that are required for flexible and accurate ACR compensation long term stability and programmable updating An MXA embedded Linux based Machine Control Computer MCC handles system management which includes support for system start up and self test on site setup and calibration event logging system functional monitoring during operati...

Страница 20: ...nates a cylindrical housing with electrostatic shielding to minimize radiofrequency emission from the probe s fluxgate switching drivers For typical charged particle beam applications e g electron microscopy e beam lithography the MAG 03MCT100 with a full scale range of 100mT 1G is normally employed Less frequently the MAG 03MC1000 with a full scale range of 1000mT 10G may be specified for EMFC si...

Страница 21: ...rough the system web user interface UI which is discussed in further detail in Section 4 1 Display screen Displays for each of 3 orthogonal axes the compensated magnetic field in the room during normal operation Also displays various error conditions including trip off conditions caused by excessively strong ambient magnetic fields and or possible system failure 1a Axial Level Records Scrolling di...

Страница 22: ...set reboot the MACS D X ACR Approximately 45 seconds is required to reinitialize and re acquire the geomagnetic environmental field baseline following a reset reboot 6 RESET Pushbutton Indicator Light BLUE Solid indicates that the system is energized and in its normal OPERATE state and magnetic field levels are within TRIP and WARNing thresholds BLUE Flash ing indicates the system is in its baseli...

Страница 23: ...nformation 20 X coil current drive signal to coil driver amplifier via rack cabinet internal harness 21 Y coil current drive signal to coil driver amplifier via rack cabinet internal harness 22 Z coil current drive signal to coil driver amplifier via rack cabinet internal harness 23 X AUXILLARY test input monitor output BNC jack in parallel with AUX probe X channel input 26 24 Y AUXILLARY test inp...

Страница 24: ...ly for production testing or special applications Normal installations make use of one of the two jumper positions available for each channel even numbered jumper positions for total axial coil set resistances of 12 5 20 ohms amplifier bridged mode output limited to approximately 80V and odd numbered jumper positions for total axial coil set resistances of 8 12 5 ohms amplifier bridged mode maximu...

Страница 25: ...nel LED level and status indicators are provided for each of the 8 amplifier channels Output level from 18dB through clipping is shown in the progression of green 31 32 33 35 34 Figure 8 Coil Driver Amplifier CDA Front Panel Note A vented grille covers the Ashly Amplifier front panel when installed in the MACS D rack cabinet assembly to prevent unauthorized access to the power switch however front...

Страница 26: ... an internal harness within the rack enclosure Connection of the room or shielded enclosure tri axial compensating coil array to the amplifier outputs is made via a 6 pin 5mm Euro connector for each axis located at the rack enclosure rear interface panel see Figure 19 MACS D system rack enclosure rear connection points for magnetic field probe compensation coils A C mains power source and LAN in S...

Страница 27: ...S D front panel and other hardware status There are 35 Trace Strips available to show the values of the A D and D A converters used in the MACS D The Peak Average display for each of the three axes may also be shown These correspond to the three strips on the MACS D front panel All values are updated every 1 second The values shown are the most recent values from the MACS D registers NOTE Due to t...

Страница 28: ...ields in each axis corresponding to probe voltage variations at the Main inputs Aux X Aux Y Aux Z These strips show the output values of the Aux channel s A D converters offset corrected for current baseline and scaled to match probe scale factor The resulting plots represent the absolute values of the peak averaged interfering magnetic fields in each axis corresponding to probe voltage variations...

Страница 29: ...probe PEM and coil ETC coefficients GAM X GAM Y GAM Z The GAM strips show the Outputs from the S3 Filters after the Gamma level adjust stages 39 Front Panel Status Indicator LEDs and Active Controls These indicators and controls are the same as the indicators and on the front panel of the System Controller Refer to Figure 3 2 through 8 in Section 3 3 for descriptions of the POWER LEVEL CONTROL RES...

Страница 30: ...if these actions are attempted if the user is not logged in Note A file stored on the MACS D defines the actual registers captur 1698608 ed The default content is to include the Status Z Main Z DEC Z S3 Z 42 Data Capture Status Trace Inactive Active This field will read Trace Inactive by default Once a capture is started the status will change from Trace Inactive to Capture Active Note that it may...

Страница 31: ... item to save the file Use the browser s Back button to return to the Capture Page Users need to be logged in to download files Deleting Files Click on the Delete Icon to delete files from the MACS D Users need to be logged in to delete files 4 4 DSP PARAMETERS PAGE The Parameters Page is used to view and edit the MACS D operational parameters Any changes to the parameters are stored on the MACS D...

Страница 32: ...ges are applied immediately Persistent field values over the Trip Level threshold in any axis will cause the system to go to an OVERLEVEL Trip condition and shut down after a programmed number of reset attempts 50 Front Panel Intensity The illumination level for the Graphics Display and LEDs on the Front Panel may be controlled using this slider This same slider can be found on the Trace Page see ...

Страница 33: ...anges and S4B Gain 53 Probe Scale This is the scale of the attached probe expressed as mT V Be certain that the corresponding Main and Aux settings match the scale factors of the probe or probes in use 54 IO Mapping This selection matrix permits selecting the mapping of several MXA internal source options to the signal output ports Figure 5 20 22 for production test and diagnostic purposes All rou...

Страница 34: ...uration This line permits selection of the major application configuration for the MACS D system MEA is selected for Electron Microscopy support MMA is selected for MRI system support There is also a Test function MTA used for factory test and on site diagnostics importantly an installed system should not be left permanently in Test mode Changing the System Configuration may result in inadvertentl...

Страница 35: ...local network may need configuration to allow the specific protocols required The Call Home port number is 62665 This port needs to be enabled for outbound connections from the MACS D to the server The MACS D also uses the TINC tunneling protocol to communicate with our VPN server This is port 655 The MACS D will also allow local connections using SSH and HTTP These are not required for any extern...

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Страница 37: ...d a significant distance from the iso center of an MRI or the desired optimum field reduction point of an EMFC site with good results often attainable by adjusting MACS D ACR parameters to effectively offset the location of optimum compensation from the actual probe location see Figure 14 47 in Section 4 4 It is important to note when determining placement of the MACS D compensating coil sets that...

Страница 38: ...uired or in special situations where a smaller isolated local PV is required a frame constructed of non conducting materials may be employed for coils support Generally two similar sized coils comprising a Helmholtz pair are required for each axis Optimum compensation mapping and greatest PV occur with an ideal Helmholtz geometry where the coil separation is approximately half the mean coil segmen...

Страница 39: ...deally from the standpoint of driver amplifier dissipation parallel connected coils of 2 cable turns per coil of the standard 15 conductor 18 AWG cable may suffice Use the compensation coil worksheet to verify the correct cable conductor size and number of turns per coil Ref 170823R1 ETS Helmholtz Compensation Coil Worksheet Figure 18 Helmholtz Coil Connector Pin Assignments ...

Страница 40: ...to Figure 19 below for connecting the compensation coils Refer to Figure 20 for the coil wiring configuration either parallel or series connected Driven compensating coils for each axis are normally arranged in an approximate Helmholtz geometry consisting of two separated coils per axis Connectors Euroblock 5 08mm 6 pin at the rear interface panel are configured so that wire pairs from the coils m...

Страница 41: ...nd CDA should be 18 or 20 AWG With the MACS D controller power OFF or with the controller in DISABLED PB manually disabled mode connect the coil feed wires to the 5 08mm Euroblock connectors supplied with the MACS D system and plug into the appropriate axial mating connectors at the MACS D rear Coil Interface Panel 5 2 SYSTEM FINAL INSTALLATION 5 2 1 Initial Onsite Verifications Ensure that the MA...

Страница 42: ...em fluxgate probe with the compensation coil axes 5 2 2 2 Survey Probes A magnetic field survey system consisting of two survey probes with logging capability is helpful although not essential for system setup Its primary utility is for evaluating and monitoring final installed system attenuation of interfering signals If used the location of the survey probes must meet the following criteria 1 Lo...

Страница 43: ...ents should occur within 1 minute 5 2 3 Setup Using the WEB UI Refer to Section 4 for the following steps as needed If not already done or window closed use a web browser to open the web UI by typing in the IP address on the front panel display The IP address will appear at the bottom of the MXA controller display Figure 4 1d This will take you to the Home page Log In Contact factory for login pas...

Страница 44: ...e MACS D MXA controller FP X display Look for a decrease in the interfering signal If the signal increases keep the Output Gain setting at 4 dB switch the polarity at right side of Output Gain slider and observe an interference decrease of about 20 If the interference level is low and the difference between the polarities is not discernible proceed to the next step Open the X Drive display While o...

Страница 45: ... 4 one minute peak to peak records of the Main X display or Y or Z whichever axis has the largest interference with the system DISABLED to the average of a similar series of records taken with the system in the OPERATE state This process will yield a system attenuation factor usually within 20 of the actual value Overall interfering field attenuation determined by this method should be greater tha...

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Страница 47: ... fixed rate or a custom fixed rate selectable as a system configuration option to constantly track the minimum average compensating magnetic field If a RESET acquisition operation is initiated during an Operational Volume OV magnetic field offset event due to external interference the same periodic LSB steps insure that the correct minimum average environmental magnetic field level is eventually a...

Страница 48: ...e states of the MACS D system RESET PBSW LED DISABLE PBSW LED LEVEL LED SYSTEM STATE X Y Z WARNING or TRIP STATUS BLUE Solid BLUE Solid BLUE Solid OPERATE None RED Solid RED Solid BLUE Solid Power Cycle full System Reboot detection N A BLUE Flash BLUE Flash BLUE Solid ACQUIRE Manual or Power Cycle Reset None BLUE Solid BLUE Solid BLUE RED Slow Flash SETUP Trip Threshold depends on machine state de...

Страница 49: ...ensation in a total elapsed time of approximately 16 seconds In the case of a newly installed system where the axial Output Gains have not yet been adjusted and interfering fields exist at the fluxgate probe location in excess of one or more axial Trip threshold levels see Figure 14 49 for adjustment screen the system will enter its SETUP state instead of the normal OPERATE state 6 3 2 Setup A SET...

Страница 50: ...purposes DISABLED AR indicates that the system has tripped off after its normal Auto Reset sequence due to an OVERLEVEL condition detected in one or more axes DISABLED PB indicates that the MACS D system has been manually put into standby mode by someone pressing the MXA front panel RESET pushbutton DISABLED AR signals that an abnormal condition has occurred while the system is in its normal OPERA...

Страница 51: ... the probe must remain in its installed position and orientation Proper system operation after the probe is repositioned will require system recalibration 7 5 COIL S REPOSITION The coils should remain in or near their installed position and orientation System recalibration is required after repositioning of the coils 7 6 SUBSYSTEM REPAIR OR REPLACEMENT Possible need for repair or replacement of sy...

Страница 52: ...ffect its performance the cabinet should be located at least 1m approximately 3ft distant from any large power transformer and as a safety consideration it must be located outside of the 0 5 mT 5G field contour of any large magnet 7 9 COIL DRIVER AMPLIFIER CDA Access to the rear of the CDA chassis e g for verifying the amplifier A C mains input voltage may be made by removing the four rear interfa...

Страница 53: ...xis to reference face 0 1 Measurement noise floor Standard version 6 10pTrms Hz at 1 Hz Low noise version MAG 03MCTL 6pTrms Hz at 1 Hz Size Diameter 25mm 0 98 Length including connector 202mm 8 0 Weight 85grams Connector mating connector Hirose RM15TRD10P RM15TRD10S Bartington MAG 03MCT100 Measurement range 100µT Scaling 100mV µT Scaling temperature coefficient 20ppm ºC Offset in zero field 5nT Of...

Страница 54: ...IER CDA Note BRIDGED MODE OPERATION ONLY Number of bridged power output channels 4 Channel pairs 1 2 3 4 5 6 7 8 7 8 is spare reserved Rated power into 8 ohm IHF bridged channel 500 W Max differential output voltage 100V Max rated output current 8 amps Warning 10A internally fused fuses are not field replaceable Frequency response D C 20KHz 1 dB Damping factor 250 Input sensitivity 32 dB bridged I...

Страница 55: ...3 CONTROLLER STATE FLOWCHART T1 N1 T2 N2 T3 AZ Period MTA Test 10sec 1 20sec 1 4 sec 4sec MMA 20sec 1 120sec 3 4 sec MEA 4sec 3 120sec 1 4 sec MEA 1 17 min Note Retry counter values are max number of retries ...

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