Summary of Contents for ETS-Lindgren MACS/D Series
- Page 1 Magnetic Active Compensation System (MACS) MACS/D Series Digital Signal Processor-Based User Manual February 2019 1680736 Rev C...
- Page 3 ETS-Lindgren Inc. reserves the right to make changes to any products herein to improve functioning or design. Although the information in this document has been carefully reviewed and is believed to be reliable, ETS-Lindgren does not assume any liability arising out of the application or use of any product or circuit described herein; nor does it convey any license under its patent rights nor the rights of others.
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Page 5: Table Of Contents
TABLE OF CONTENTS NOTES, CAUTIONS AND WARNINGS SAFETY INFORMATION GENERAL SAFETY CONSIDERATIONS OPERATORS SAFETY SUMMARY 1.1 CONFORMANCE TO INDUSTRY STANDARDS ....11 1.1.1 Safety . - Page 6 3.3.2 Controller Rear Panel ......22 3.3.3 System Controller Main PCB Coil Resistance Jumpers 3.3.4 Coil Driver Amplifier ......25 HTML USER AND DEVELOPMENT INTERFACE 4.1 TOP LEVEL MENU PAGE .
- Page 7 6.3.1 Acquire ....... 49 6.3.2 Setup ....... . 49 6.3.3 Operate .
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Page 9: Notes, Cautions And Warnings
NOTES, CAUTIONS AND WARNINGS Note: Denotes helpful information intended to provide tips for better use of the product. Caution: Denotes a hazard. Failure to follow instructions could result in minor personal injury and/or property damage. Included text gives proper procedures. Warning: Denotes a hazard. -
Page 10: General Safety Considerations
GENERAL SAFETY CONSIDERATIONS Before power is applied to this instrument, ground it properly through the protective conductor of the AC power cable to a power source provided with the protective earth contact. Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal could result in personal injury. -
Page 11: Operators Safety Summary
OPERATORS SAFETY SUMMARY The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and cautions will be found throughout the manual where they apply. 1.1 CONFORMANCE TO INDUSTRY STANDARDS This instrument complies with the following industry safety standards and regulatory requirements. 1.1.1 Safety CSA: Electrical Bulletin... -
Page 12: Power
Indicates dangerous voltages. Earth terminal, ground. 1.4 POWER 1.4.1 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 130 volts RMS, or 220/240 volts 50/60 hertz that does not apply more than 260 volts RMS between the supply conductors, or between either supply conductor and ground. -
Page 13: Do Not Operate In Explosive Atmospheres
Australia/China/New Zealand/Argentina Israeli 3-pin/blade 3 blade 220V 240V Swiss 3-pin Danish 3-pin 220V Table 1. International Power Connector/Voltage Identification 1.4.5 Do Not Operate in Explosive Atmospheres This product is not certified for operation in an explosive atmosphere. 1.4.6 Do Not Remove Covers or Panels To avoid personal injury, do not remove the product covers or panels unless qualified to do so. -
Page 15: Servicing Safety Summary
SERVICING SAFETY SUMMARY SERVICING INFORMATION FOR QUALIFIED SERVICE PERSONNEL ONLY Refer also to the preceding Operators Safety Summary. 2.1 DO NOT SERVICE ALONE Any internal adjustment, maintenance, and repair of the opened instrument under voltage should be carried out only by a skilled person who is aware of the hazard involved. -
Page 17: System Description
SYSTEM DESCRIPTION Figure 1. ETS-Lindgren MACS/D digital active compensation system (probe, coils not shown) 3.1 INTRODUCTION ETS-Lindgren MACS/D-ACR (Magnetic Active Compensation Shielding/Digital–Adjustable Compensation Ratio) systems are designed to significantly attenuate environmental magnetic fields affecting TEM, STEM, MRI, or other magnetically-sensitive instrumentation or equipment. All MACS/D signal conditioning is performed in the digital domain by the system’s high resolution, low-latency digital signal processor (DSP), which permits exacting definition of the extremely accurate filter characteristics required for ACR processing. - Page 18 Figure 2. MACS/D Active Compensation System Functional Configuration, illustrating single axis of 3 identical axes Definitions: • MXA – MACS/D Controller/Signal Processor • ADC – Analog to Digital Converter • DSP – Digital Signal Processor • DAC – Digital to Analog Converter •...
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Page 19: Overview And System Components
3.2 OVERVIEW AND SYSTEM COMPONENTS 3.2.1 System Controller (MXA) The MACS/D System Controller is supplied with a universal software/firmware (SW/FW) package that permits configuring, by LAN software access and selection, appropriate SW/FW for a) general EMF Compensation (EMFC) shielding applications or b) MRI system shielding. The resulting MACS/D system configurations are denoted as MACS/D-EMFC-ACR (MEA) and MACS/D-MRI-ACR (MMA) respectively. -
Page 20: Magnetic Field Sensor
3.2.3 Magnetic Field Sensor Triaxial fluxgate magnetometer probes are specified for MACS/D system installations to provide extended-low- frequency attenuation of time-varying interfering fields within the Protected Volume (PV). The model series of magnetic probe specified for MACS/D systems has been selected for low noise sensing of interfering magnetic fields with good dynamic range in a single compact, integrated package. -
Page 21: System Controls, Connectors And Indicators
narrow, to move the coil boundaries somewhat into the room with the cables crossing the ceiling and floor. Specification and installation of system magnetic field compensating coils and guidelines for estimating geometric limits are presented in Section 5.1.3, Compensation Coil Installation. 3.3 SYSTEM CONTROLS, CONNECTORS AND INDICATORS 3.3.1 Controller Front Panel The MACS/D MXA controller front panel and display, accessible by site operators and users, consists of... -
Page 22: Controller Rear Panel
(1c) Date and Time – Date is written in YY/MM/DD format, updated from the embedded computer Real Time Clock (RTC) or public NTP server. (1d) Local Area Network (LAN) IP address, via DHCP or permanently assigned if behind firewall. (1e) System Configuration –... - Page 23 (11) Z coil connection to coil driver (amplifier), via rack cabinet internal harness. (12) X MAIN test input/monitor output (BNC jack in parallel with MAIN probe X channel input (15)). ° (13) Y MAIN test input/monitor output (BNC jack in parallel with MAIN probe Y channel input (15)). ° (14) Z MAIN test input/monitor output (BNC jack in parallel with MAIN probe Z channel input (15)).
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Page 24: System Controller Main Pcb Coil Resistance Jumpers
3.3.3 System Controller Main PCB Coil Resistance Jumpers Reliability of the MACS/D magnetic field compensation system is enhanced by limiting the Coil Driver Amplifier (CDA) axial channel output voltages and currents to appropriate maximum levels for a range of possible coil resistance values. -
Page 25: Coil Driver Amplifier
Figure 6. Coil Impedence Jumper Configuration for Units S/N: ETS001-ETS017 (previous MPCB versions) Note: View is from front of MXA Controller. Jumpers for default 12.5-20 ohm range are indicated by filled in locations. Blank locations are 8-12.5 ohm range. Channel i.d.'s from left to right are: ZB (J19,20), ZA (J17,18), YB (J15,16), YA (J13,14), XB (J11,12), XA (J9,10). - Page 26 yellow and red LED’s. Per channel status indicators are provided for BRIDGED mode, over TEMP, and over CURRENT conditions. Note: Illumination of the RED level LED indicate an error requiring factory service. (33) Signal Level Indicators – Illumination of the lowest LED begins when the output voltage reaches -18dB below rated output (approx.
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Page 27: Html User And Development Interface
HTML USER AND DEVELOPMENT INTERFACE NOTE: All HTML pages function both locally and remotely. This infrastructure underpins the remote diagnostics and developmental testing. 4.1 TOP LEVEL MENU PAGE The Home Page provides a brief description of the available pages. Figure 10. MACS/D Home Page 4.2 MACHINE PERFORMANCE TRACES PAGE The Trace Page provides a 60 second trace of various system parameters. -
Page 28: Examine A Trace
4.2.1 Examine a Trace Figure 11. MACS/D Trace Page (38) Selectable Trace Strips and Definitions • X, Y, Z These strips are identical to those on the Front Panel Display. These traces are the weighted average of the ambient magnetic field value at the probe location following baseline offset acquisition and HF filtering, and are displayed in µT (microteslas, 1µT=10 mG). - Page 29 Note: There are actually 6 outputs, but the secondary set is not present in the trace. The Secondary Set is not currently used and is reserved for future features. Note: On the Parameters page (see Section 4.4), these output sets are referred to as “Bank 1” and “Bank 2”. •...
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Page 30: Dsp Capture Page
(41) System Information – This field reports the system’s operational status, the CDA A.C. input current in ARMS, and the most recent MCC, DSP, and CPLD versions installed. Other information in this area is for development and advanced diagnostic purposes and not normally used on-site. 4.3 DSP Capture Page The Capture page is used to acquire a long-term trace. -
Page 31: Dsp Parameters Page
(44) Capture Time – Select the desired duration time from the drop down menus for hours, minutes, and seconds. (45) Name – This field is optional; the filename of the saved capture will be the timestamp from when the trace was started, followed by the name entered into this field (if applicable). - Page 32 Figure 14 below shows the Basic Parameters. Users do not need to be logged in to view this page. Without logging in, only the Front Panel Intensity slider may be changed. Figure 14. MACS/D Parameters Page - Basic (47) Gamma – This parameter control panel sets the degree of ACR offset contribution; the value of zero for a given axis denotes zero ACR component.
- Page 33 (52) System Status – The current System Status is displayed for informational purposes. This field cannot be changed. Figure 16. MACS/D Parameters Page - Advanced NOTE: The Advanced Parameters are for Field Engineer or Expert use only and are password protected. The register panels in the Advanced Parameters page allow modification of the system internal coefficients.
- Page 34 source choices, “Std” refers to the normal MACS/D signal processing chains for the X, Y, Z axes; “Main” is the direct Main probe input (X, Y, Z axes); “Aux” is the direct Auxiliary probe input (X, Y, Z axes); “Coil” is the PEM transducer input (X, Y, Z axes);...
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Page 35: Local Login And Vpn Secure Remote Access
4.5 LOCAL LOGIN AND VPN SECURE REMOTE ACCESS 4.5.1 Local Internet or LAN Ethernet Connection Disconnect Ethernet cable during normal operation. Network communication may be over a LAN or through a local Ethernet switch or router. Direct connection to a PC is also supported. If you connect an Ethernet cable directly between a PC and the MACS, the MACS/D will be reachable at IP Address 10.190.190.3. -
Page 37: Installation
INSTALLATION 5.1 SYSTEM LAYOUT A MACS/D active-shielded site installation consists of a tri-axial fluxgate probe; a rack cabinet housing a MEA⁴ - or MMA⁵ -configured MACS/D system controller with a coil driver amplifier (CDA); and three orthogonal sets of Helmholtz coil pairs. Multiconductor cables comprising the Helmholtz coil pairs are usually located in proximity to the room vertices. -
Page 38: Macs/D Rack Cabinet Location
sensing element is printed on the probe housing along with the product code, measurement range, and serial number. Each of the orthogonal sensing elements is precisely aligned with respect to the central axis of the probe cylinder. Bipolar power for the sensors (±15V) is supplied via the probe signal cable; three wires are used for the discrete X, Y and Z sensor output signals and associated ground. - Page 39 may be required, and in larger rooms the required cables may be comprised of 16 AWG conductors in place of the lighter 18 gauge cable normally specified. In some cases, less ideally 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.
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Page 40: Compensation Coil Connections To The Rear Interface Panel
In each coil of the coil set, the cable conductors are cross-connected by means of 15-pin Molex or equivalent male/female plug sets to obtain a 15-turn coil assembly, as illustrated in Figure 18. Correct phasing of the individual coils in each axial pair is essential for proper operation of the system. Once connected as a Helmholtz pair, each coil's field vector, as seen at the coil center, must point in the same direction. -
Page 41: System Final Installation
Note: MRI and other filtered-entry rooms, and parallel-wired installations require the 2-wire scheme. Utilization of shielded MACS/D to entry filter interconnect cable is recommended for sites experiencing incidences Figure 20. Electrically identical Coil Connection Schemes, 4 wire/2-wire of abnormally high environmental R.F. levels (in excess of approximately 1 V/m, at one or more spot frequencies in the range of 100 KHz –... -
Page 42: Onsite Setups And Electrical Interconnects
100-120V, 50-60 Hz US/Canada/Japan Installations* 220-240V, 50-60 Hz UK and European Installations *CDA maximum output is limited to 400W/bridged channel for reduced A.C. mains voltage of Japan Installations, unless the CDA has been specified for 100Vac input. Refer to Section 2 for additional safety details. •... -
Page 43: Setup Using The Web Ui
5.2.2.4 Power Up: • Power up the system by turning on the rocker switch/breaker on the MXA controller’s rear panel (Figure 5, (18)). A chime sounds, and system initiates boot load, the message “LOADING” is presented on the front panel display screen. -
Page 44: Field Compensation Adjustment And Verification
Do not modify coefficients without factory authorization. S4B GAIN – 0,0,0 for standard BNW⁷ coefficient set. (In any unique case where a factory- approved non-standard filter coefficient set is used, recommended values will be supplied.) S3K –Verify standard coefficient set: X kp = 0.1, X k1 = 1.0, X k2 = 1.0; same for Y, Z axes. Select the appropriate System Configuration: MMA for MRI sites, MEA for EMFC sites. -
Page 45: Amplifier Current Check And Attenuation Factor Checks
5.3.2.2 MMA (Compensation for MRI magnet interaction with interfering fields): • Adjust Principle Axis (Z-axis) Gamma ± value for optimum isocenter interfering signal cancellation. If large X-Y plane interference exists, adjust Secondary Axes (Y- and Z-axes) Gamma ± values for possible isocenter cancellation improvement. -
Page 47: Operation
OPERATION 6.1 GENERAL COMMENTS All MACS/D core systems are controlled by state machine logic contained in a Complex Programmable Logic Device (CPLD). The CPLD monitors various system conditions, responds to user controls, displays status information, and controls internal networks, based on the system operational state. The machine states are defined in the CPLD; the sequence of machine states is defined in the DSP firmware (FW), which determines the current operating state and what, if any, changes are to be made in the controller subsystem settings in response to changes in the system operating conditions as determined by the MACS/D Digital Signal Processing (DSP) engine and Machine Control... -
Page 48: Macs/D Controller Operational States
6.3 MACS/D CONTROLLER OPERATIONAL STATES The POWER, LEVEL, and CONTROL LED Indicator Lights (Figure 3, (2-4)) indicate the machine state. The RESET and DISABLE pushbuttons (Figure 3, (5, 7)) with corresponding indicators (Figure 3, (6, 8)) permit manual front panel control and controller state monitoring. When the MACS/D System is powered, it is always in one of the following states: ACQUIRE, SETUP, OPERATE, OVERLEVEL, DISABLED-AR, or DISABLED-PB. -
Page 49: Acquire
Key: BLUE Solid Steady Blue RED Solid Steady Red Blue w/ Red Slow Flash (300ms every 3 sec) Blue w/ Red Med Flash (300ms every 2 sec) Blue w/ Red Fast Flash (300ms every 1 sec) Blue Fast Flash (400ms every 0.8 sec) Blue/Red Flash (400ms/400ms) Disabled-AR... -
Page 50: Operate
6.3.3 Operate The unit enters its OPERATE state when it successfully leaves the Setup state. When in the OPERATE state the system is operating normally, i.e., compensated axial magnetic field values at the probe are below the Trip thresholds and no system faults are detected. While in the OPERATE state, if a POWER Trip occurs, typically due to an A.C. -
Page 51: General Comments
GENERAL COMMENTS 7.1 SCHEDULED INSPECTIONS There are no normally scheduled inspections required. The system is self-monitoring and will provide a chime signal along with front panel and remote status indications (over the secure VPN Internet connection) if an out-of- specification condition such as excessive Protected Volume (PV) magnetic fields is detected. 7.2 INDICATIONS FOR RE-CALIBRATION A need for re-calibration is indicated by reduced system magnetic field attenuation factor or system shutdown that is found to be due to reduced magnetic field attenuation or to oscillation in one or more axes. -
Page 52: Macs/D Rack Cabinet
7.8 MACS/D RACK CABINET For installation and operating convenience, the MXA controller is supplied mounted in an steel equipment rack with the Coil Driver Amplifier (CDA). Although the physical placement of the rack cabinet will usually not affect 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. -
Page 53: Appendices
APPENDICES A.1 BARTINGTON PROBE SPECIFICATIONS Bartington MAG-03MCT-series Number of axes Analog output +/-10V full-scale; operational range ±14V Supply Voltage (MACS/D) ±15V Supply current +27mA, -8mA (+1.4mA per 100μT for each axis) Power supply rejection ratio 5μV/V Output impedance 10Ώ Linearity error <... -
Page 54: Subsystems - Macs/D Controller (Mxa)
A.2.1 SUBSYSTEMS - MACS/D CONTROLLER (MXA) Number of axial channels Data conversion rate 100Ks/s Data conversion resolution Input full scale ±10V Signal processing latency, I/O 20µs Output range selection (internal jumper, ±2V (12.5-20 ohm coil set), ±1.4V (8-12.5 ohm coil set), ±10V each axis) (special application) Front panel display... -
Page 55: Controller State Flowchart
A.3 CONTROLLER STATE FLOWCHART AZ Period MTA (Test) 10sec 20sec 4 sec 4sec 20sec 120sec 4 sec “ 4sec 120sec 4 sec “ MEA-1 “ “ “ “ “ 17 min Note: Retry counter values are max. number of retries... -
Page 56: Ets-Lindgren Worldwide Contact Information
A.4 ETS-LINDGREN WORLDWIDE CONTACT INFORMATION Address 1360 North Wood Dale Rd Suite G Wood Dale, IL 60191 Phone (630) 307-7200 (630) 307-7571 Email sales@ets-lindgren.com Address 1301 Arrow Point Drive Cedar Park, Texas 78613 Phone (512) 531-6400 Service Phone (512) 531-2609 (512) 531-6500 Email sales@ets-lindgren.com... - Page 57 CHINA Address Room 1016-1018, 10th floor Jin Ao International Building No. 17 Ma Dian East Road, Haidian Dist., Beijing, P.R.C 100088 Phone + 86 (10) 82730877, 82730878 + 86 (10) 82730880 Email china@ets-lindgren.com Address Room 805, building 8, No 28 Tongxin road Hongkou district, Shanghai, P.R.C, 200083 Phone...
- Page 58 SINGAPORE Address 100 Beach Road #13-03 Shaw Tower Singapore 189702 Phone +65 63910912 +65 62989509 Email singapore@ets-lindgren.com TAIWAN Address 8F-1, No. 380, Sec 1, Fu-Hsing South Road, Virtuoso Enterprise Building, Taipei, Taiwan 106 Phone (886)-2-27023389 (886)-2-27023389 Email taiwan@ets-lindgren.com...
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