• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA30A41E20GYZ
  • Topic ID: id_13106443 Version: 5.0
  • Date: Feb 21, 2021 9:07:47 PM

MNS installation and upgrade (3.0T)

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
2Not Applicable9 hoursNot Applicable
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Non-magnetic Tool Kit1---
Table 3. Consumables
ItemQuantityEffectivityPart numberManufacturer
Tie WrapsAs needed---
Table 4. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
Ferrite toroid key1---
Table 5. Safety
Table 6. Required conditions
ConditionReferenceEffectivity
Remove any twists and kinks from the cabling. When routing cables, avoid circular loop bundles. Use “figure eight” coils of less than 6 ft (2 m) in diameter.--
Allow 3 ft (1 m) of cable slack at the entrance to the cabinets.--
If the amplifier cabinet is a AMT/Herley, move the MNS cabinet door down using the adjustable hinges before positioning the cabinet. With an opening at the top of the cabinet, the cables can be routed up and out of the MNS cabinet.--

About this task

The 3.0T Multi-Nuclear Spectroscopy (MNS) Kit includes a broadband exciter, amplifier, cabling, T/R switch, TX switch, upconverter, and service coil for 31P spectroscopy. Other MNS nuclei are supported by the kit, although separate T/R switches, coils, and phantoms are necessary.
Note: MNS scans can only be executed on the curved table. The flat or GEM table is not compatible with the MNS option.

There are two individual amplifiers that are utilized for the spectroscopy option:

  • 8 kW AMT/Herley amplifier – This is the original amplifier and is easily identified by cables connecting to the rear of the cabinet.
    Figure 1. 8 kW AMT/herley cabinet – front and back
    ItemDescription
    1Front of 8 kW AMT/Herley cabinet
    2Back of 8 kW AMT/Herley cabinet
    3Cable connections
  • CPC MNS amplifier – This is a new amplifier introduced in summer of 2014. Cables connect to the top of the cabinet for this amplifier.
Note: The CPC MNS amplifier is only compatible with DV systems MR750, MR750w and Architect T. It is not compatible with HD systems.
Figure 2. CPC cabinet – front and top
Item Description
1Front of CPC cabinet
2Top of CPC cabinet
3Cable connections

Two hoist support brackets are in the bottom of the CPC cabinet crate. Install them on the top of the cabinet so that they do not get lost.

Figure 3. CPC Cabinet – top with hoist support brackets
Item Description
1Hoist support brackets (2)
Topic ID: id_SL1870989-1054743

System power shutdown

Procedure

  1. To prevent fatal electric shock, disconnect the power from the PDU before doing the following procedures.
  2. Do LOTO on the PGR PDU/gradient subsystem, which disconnects the INPUT circuit breaker. See the MR Service Safety Manual, PN 5452735.
Topic ID: id_SL189549-1054743

Installing RF detector boards, BB AIF board, and cables

About this task

Board Requirements:
  • Amp IF Board: a quantity of 1 BB Amp IF Board is required for the MNS option, either PN 5250032 (non-RoHS) or 6250112 (RoHS)
  • RF Detector Boards: a quantity of 2 RF Detector boards are required for the MNS option. Systems with a Dual Drive RF amplifier will already have the boards installed. Systems with a Single Drive RF Amplifier will require the installation of two additional RF Detector Boards. It is required and important that the part number of the RF Detector Boards being installed match the part number of the other RF Detector Boards already installed (for NB) in the CAM (or ASC) chassis. If the CAM (or ASC) chassis has RF Detector boards with PN 5250034, then the RF Detector Boards for MNS option must also be 5250034. If the CAM (or ASC) chassis has RF Detector boards with PN 6250264, then RF Detector Boards for MNS option must also be 6250264.

Procedure

  1. (For Systems with CAM Chassis)
    1. At the front of the PGR cabinet, locate slots 19U and 19L on the UPM chassis. Remove the covers from the blank slots, remove the aluminum blanking insert panel if present, and insert one BB UPM RF detector board into each slot.
    2. Locate slot 17U/18U in the UPM chassis. Remove the covers from the blank slots, remove the aluminum blanking insert panel if present, and insert the BB amp IF board.
    3. Locate the pre-installed white sub-D cable, PN 5166354 or PN 5410020, coiled and secured in the right side of the cabinet. Uncoil the cable and attach it to BB AIF board J3 in slot 17U/18U.
    Figure 4. BB UPM RF detector and BB amplifier IF board
    Item Description
    ABB amplifier IF board - slot 17U and 18U
    BBB UPM RF detector board 19U
    CBB UPM RF detector board 19L
    D50 ohm terminators
    ESlot identification numbers
  2. (For Systems with ASC Chassis)
    1. At the front of the PGR cabinet, locate slots 10 and 13 on the UPM chassis. Remove the covers from the blank slots, remove the aluminum blanking insert panel if present, and insert one BB UPM RF detector board into each slot.
    2. Locate slot 6 in the UPM chassis. Remove the covers from the blank slots, remove the aluminum blanking insert panel if present, and insert the BB amp IF board.
    3. Locate the pre-installed white sub-D cable, PN 5722895, coiled and secured in the right side of the cabinet. Uncoil the cable and attach it to BB AIF board J3 in slot 6.
    Figure 5. BB UPM RF detector and BB amplifier IF board
    Item Description
    ABB amplifier IF board - slot 6
    BBB UPM RF detector board 10
    CBB UPM RF detector board 13
    D50 ohm terminators
    ESlot identification numbers
Topic ID: id_SL14077118-1054743

Installing MNS power connections

About this task

For systems without PDM, skip to Step 2.

Procedure

  1. (For systems with PDM) Remove the power distribution module (PDM) located in the top right corner of the PGR cabinet:
    1. Remove all cables connected to the front and top of the PDM.
      Figure 6. Front of PDM
      Figure 7. Top of PDM
    2. From the top of the PGR cabinet, remove the outer edge screws surrounding the PDM securing this unit to the rails. Remove all the screws from the PDM door.
      Figure 8. Open PDM door
    3. From the inside of the PDM, with the door open, unscrew the two cables locks (block retaining nuts) from the rear of the PDM, and disconnect the connections from the two terminal blocks. After the cables are disconnected, close the PDM door.
      Note: It is important to note the orientation of the connections at the terminal blocks. Label the cables or record where to reconnect these cables later in the procedure.
      Figure 9. PDM - disconnecting internal cable
    4. Slide the PDM out from the front of the PGR cabinet. Set it aside on a flat and safe surface.
  2. (For systems without PDM) Install the MNS breaker box in the top right corner of the PGR cabinet (for systems with PDM, proceed to Step 3):
    1. Remove the blank plate located in the top right corner of the PGR cabinet. Remove six screws from the top side of the cabinet.
    2. Attach the adapter plate to the MNS breaker box with one screw.
    3. Slide the adapter plate into position at the top of the PGR cabinet, secure it with screws (removed earlier from the top side of the cabinet), and attach the MNS breaker box to the right handrail in the PGR cabinet using two screws.
      Figure 10. MNS breaker box positioning
    4. Run the power cable from the MNS breaker box along the top edge of the PGR cabinet, and secure with cable ties as needed.
      Figure 11. Cable route along top edge of PGR cabinet
    5. Route the cable down the left side of the PGR cabinet to the terminal strip. (To access the terminal strip, the RF amplifier and CAM chassis (or ASC Chassis in case of ICE configuration) must be rolled out from the PGR cabinet.)
      Figure 12. Terminal strip location
    6. Roll the RF amplifier out from the PGR cabinet. For details, refer to XRFD and Power Supply Replacement.
    7. (For systems with CAM chassis) Roll the CAM chassis out from the PGR cabinet. For details, refer to CAM Chassis Replacement.
    8. (For systems with ASC chassis) Roll the ASC chassis out of PGR Cabinet. For details, refer to KASC Assembly Replacement.
    9. Note: It may be necessary to lean over the pulled out modules in the next step. Be careful not to put too much pressure on them.
      With a 5/16 inch socket wrench, connect the five wires from the power cable to the terminal strip as follows:
      • Connect the ground wire to terminal 6.
      • Connect wire labeled “N” (neutral) to terminal 4.
      • Connect the L1, L2, and L3 wires to terminals 1, 2, and 3. (The specific order of these wires is not important.)
      • Install the terminal strip plastic cover.
      Figure 13. Terminal strip connections
    10. Ensure that the cables are securely fastened, and return the RF amplifier and the CAM or ASC chassis to their original positions.
  3. (For systems with or without PDM) At the PGR I/O panel, remove the blank plate from the J204 connection.
  4. Attach cable.
    1. (For Systems with CAM Chassis) Attach cable 5271096 to J204 on the underside of the I/O panel. Run this cable along the side of the PGR cabinet between the cabinet wall and the recon components. Attach the other end of the cable to the BB AIF board at CAM SLOT 17/18FU J5.
    2. (For Systems with ASC Chassis) Attach cable 5271096–2 to J204 on the underside of the I/O panel. Run this cable along the side of the PGR cabinet between the cabinet wall and the recon components. Attach the other end of the cable to the BB AIF board at ASC SLOT 6 J5.
    Figure 14. I/O panel and cable locations
    Item Description
    APGR I/O panel
    BBNC cables
    CUPM cable
  5. Note:

    Before attaching the BNC cables (J200-203) to the I/O panel, connect the adapter (46-208990P1) to the BNC connector.

    Figure 15. BNC connector and adapter
    Attach BNC cables.
    1. (For systems with CAM Chassis) Attach the BNC cables to J200-203 connections on the underside of the I/O panel. Run these cables along the side of the PGR cabinet between the cabinet wall and the recon components. Attach the other ends to CAM slot 19FU J4, CAM slot 19FU J5, CAM slot 19FL J4, and CAM slot 19FL J5 .
    2. (For systems with ASC Chassis) Attach the BNC cables to J200-203 connections on the underside of the I/O panel. Run these cables along the side of the PGR cabinet between the cabinet wall and the recon components. Attach the other ends to ASC slot 10 J4, ASC slot 10 J5, ASC slot 13 J4, and ASC slot 13 J5 .
    Figure 16. BNC connectors at I/O panel
  6. Add a 50 ohm terminator (2329754 or equivalent) to any unused port(s) on the RF detector boards.
  7. Tie wrap the MNS cables that run along the side of PGR cabinet. Ensure the cables are not in the way of other components that may require service.
    Figure 17. Tie-wrapped MNS cables
  8. (For sites with PDM) After all cables are connected properly and tie wrapped, slide the PDM into the PGR cabinet:
    1. From the top of the PGR cabinet, open the PDM door, and route the power cables through the opening at the rear of the PDM.
      Figure 18. Cables from rear of PDM
    2. From the inside of the PDM, connect the cables and screw on the black retainer nuts to secure the cables.
      Figure 19. Reconnecting cables in PDM
    3. Close the PDM door, attach the PDM to the rails with the surrounding screws, and screw the PDM door closed.
    4. Connect all cables to the top and front of the PDM as shown in Figure 6 and Figure 7.
Topic ID: id_SL5482640-1054743

Installing MNS in CAM or ICE chassis

Topic ID: id_SL5482641-1054743

Installing MNS hardware in PGR cabinet with XG2 and CAM

About this task

With the introduction of XG2 gradient hardware, dual-fiber connections at the front of the IXG are relocated to accommodate installation of the MNS option. For systems with the previous XGD hardware configuration, see Installing MNS hardware in PGR cabinet with XGD.
Figure 20. Cabinet with XG2 gradient hardware (no cronus chassis above ICN)
Item Description
1XG2 gradient driver hardware
2CAM

Procedure

  1. Connect the fiber optic cable to J12 of the IXG board.
    Figure 21. IXG board with cables for MNS configuration (MR750 and MR750w, DV VCP hardware)
  2. This cable is the Gigalink (DVMR Link) from the exciter to the IXG.
Topic ID: id_SL5482645-1054743

Installing MNS hardware in PGR cabinet with XGD

About this task

On systems released before DV VCP (contains Cronus chassis, item 1 below), the ERF board must be installed into the CAM chassis.
Figure 22. Cabinet with previous hardware (pre-DV VCP)
ItemDescription
1Cronus Chassis
2XGD gradient driver hardware

Procedure

  1. Locate slot 8F on the CAM chassis in the PGR cabinet. Remove the cover from the blank slot.
    Figure 23. ERF and IXG boards with cables for MNS configuration (MR750w system)

    Click to download a higher-resolution PDF of the ERF and IXG boards in MNS configuration. PDF

  2. Insert the ERF board and seat it securely. Attach the ERF board to the CAM chassis using two screws: one at the top and another at the bottom.
  3. Remove the clock cable from J8 on the IXG board and connect it to J8 on the ERF board. The cable connects the ERF board (J8) to the exciter (J21).
  4. Daisy-chain the clock signal from the ERF board (J9) to the IXG board (J8) using the provided green cable (PN 5415142).
  5. Remove the channel 1 cable pair (PN 5191301-5/6) from J14 on the IXG board and connect it to J11 on the ERF board. This cable connects to receiver 2 (J5).
  6. Connect the ERF board (J14) to the IXG board (J14) using the cable pair (PN 5416143).
  7. Remove the cable from J13 on the IXG board and connect to J10 on the ERF board.
  8. Connect the cable (PN 5265483) from the new MNS exciter (H1) to J13 on the IXG board.
  9. Confirm that the cable pair (PN 5192963-3/4) connecting the IXG board (J11) to the exciter (J19) is connected.
Topic ID: id_SL189552-1054743

Installing broadband exciter module (5300204-2) in CAM or ICE configuration

Procedure

  1. Connect the ends of cable 5262319 to J1 and cable 5265145 to J2 at the rear of the broadband exciter module before inserting it into the PEN cabinet.
  2. From the front of the cabinet, insert the module under the NB exciter in the PEN cabinet. Route these cables to the rear of the cabinet.
    Figure 24. BB Exciter Module Location
    Item Description
    ACAN fiber-optic board (CFB)
    BNB exciter board
    CMNS BB exciter board
    DThumbscrews securing module to cabinet frame
  3. Attach the exciter board to the PEN cabinet with the two thumbscrews.
  4. In the scan room, loosen all the captive thumb screws, open the PEN access panel, and attach cable 5262319 to J31 and cable 5265145 to J33.
  5. Close the PEN access panel and tighten all thumb screws.
  6. Detach cable 5171626 from NB exciter J18, and reconnect it to broadband exciter J17_J1 lower. (This cable is not part of the MNS cable kit.)
  7. Locate the cables indicated in the table below, and connect as directed.
    Note: Route the PGR fiber cable (J12) along the left side of the PGR cabinet following the same route as the other bundled fiber cables.
    Table 7. Broadband exciter cable connections
    Cable Part number Cable run number J number on MNS exciter Connected To Description
    5266021[None]J24J14 of NB exciterConveys clock and LO signal from NB to BB exciter
    5165866-2[None]J17_J1 (upper)J18 of NB exciter1-wire data
    5171626[None]J17_J1 (lower)Pen cabinet IO (already installed)1-wire data
    5265483E2024H1 (Gigalink IO)

    (For CAM) J12 of IRF3 or IXG board

    (For ICE) J32

    		CAM
    5419641-2[None]J15J4 of SRPSDC power for MNS exciter
    5271821 (if longer than required, “figure eight” the excess length and tie wrap)[None]J21J16 of PEN cabinet topMNS Tx output of exciter
    5262319[None]J1J31 of PEN cabinet wallMNS LO
    5265145E1309J2J33 of PEN cabinet wallMNS loopback
  8. Tie wrap the cables together to ensure the cables are safely contained within the cabinet, as follows:
    • On the NB exciter, group cables from J14, J15, J17, J18, and J10.
    • On the BB exciter, group cables from J14, J17, and J18.
    Figure 25. PEN boards with cables tie-wrapped (pre-DV VCP example)
  9. Verify proper fiber optic cable connection from the exciter to:
    • J12 of the IRF3
    • or J12 on IXG board
    • or J32 on ICE
    • Depending on system type.
Topic ID: id_SL2045117-1054743

Installing MNS upconverter – PN 5189655-2 (non-RoHS) or PN 5480090-2 (RoHS)

About this task

The MNS upconverter is installed on the rear pedestal of the magnet.

Figure 26. Upconverter location

Procedure

  1. Install the MNS upconverter module into the upconverter bracket.
  2. Attach the mounting bracket with the MNS upconverter to the rear pedestal frame.
  3. Locate and connect the cables indicated in the table below.
    Table 8. MNS Upconverter Cable Connections
    Cable part number Cable run number J number on MNS upconverter Connected To Description
    5166749-5, -8M1308J3J31 of PEN cabinet wall via overhead cable trackMNS LO
    5169804-22, -31M1309J1J33 of PEN cabinet wall via overhead cable trackMNS loopback
    5181541M3356J2J11 - slot 11 board of RF hubPower and controls for MNS upconverter
    5191729-5[None]J4LPCA connector A via LPCA cable trackConnected to RF hub, slot 1, A1A2. Remove cable at RF hub and connect to J4 on the upconverter.
    5191729-3[None]J5A1A2 - slot 1 board of RF hub8W8 upconverter signal output. Install on slot previously removed on RF hub.
    Note: On the RF control board, some cables may be need to be disconnected to properly connect the MNS upconverter cables. Reconnect these cables after the upconverter is fully installed.
    Figure 27. Upconverter box (Viewed from Patient End)
Topic ID: id_SL2340744-1054743

Installing LPCA cover

Procedure

  1. With the LPCA cover off, place the two LPCA rails on the top of the MNS LPCA cover so the notches are facing up. When viewing from the patient end, the right LPCA rail should have the notch farthest away, and the left rail should have the notch closest.
  2. Attach the rails to the cover by fastening the screws from the underside. (Screw heads are hidden underneath the cover.)
  3. Install the LPCA cover on the system and secure with four screws.
Topic ID: id_SL13768933-1054743

Ferrite installation

About this task

Inside the Equipment Room, install ferrites on the gradient cables connecting to the gradient filter on the Equipment Room side of the Secondary Penetration Wall.

Procedure

  1. Open the ferrites using the tool provided (Ferrites may be opened and closed multiple times).
    Figure 28. Ferrite and key
  2. Place one ferrite on each red and black gradient lead and squeeze the ferrite to lock it closed.
    Figure 29. Ferrites installed on gradient leads

    Installation notes:

    • Ferrites fit loosely around the cables and do not require exact placement
    • Ferrites may be placed behind the bottom cover of the pen-wall filter
    • Ferrites do not require mechanical anchoring
    • Do not place a ferrite around the smaller ground lead
Topic ID: id_SL189555-1054743

Installing MNS T/R switch on LPCA – PN 2354050 (non-RoHS) or PN 5409918 (RoHS)

About this task

The MNS T/R module should be removed from the system when spectroscopy is not in use. The presence of the module during a non-MNS scan may cause image quality degradation.

Procedure

  1. Move the LPCA to a position for easy access, either to the front or rear of the magnet.
  2. Slide the MNS T/R switch on the two rails on the front of the LPCA.
    Note:
    The Delrin button at the side of the switch must be pushed to disengage the T/R switch from the LPCA rails.
    Figure 30. Delrin button on T/R switch
  3. Attach the cables of the MNS T/R switch to the MNS A-port adapter.
  4. Attach the A-port adapter to the A-port of the LPCA.
Topic ID: id_SL2321031-1054743

Installing MNS TX switch (PN 2254635)

Procedure

  1. Loosen the two thumbscrews to remove the support bracket from the secondary PEN wall (SPW).
    Figure 31. MNS TX switch setup on SPW
    Item Description
    ASupport bracket thumb screws
    BTX switch 1
    CTX switch 2 (MNS)
    DY-cable
  2. Install the MNS TX switch to the support bracket, and connect all cables as shown in the MNS cable map below. Refer to item C in Figure 31 for the location of the MNS TX switch.
    Note: The cable connections for the 8 kW RF amplifier in following illustration are the same for both the AMT/Herley and CPC cabinets.
    Figure 32. MNS cable map for MR750 (IRF3 Board in CAM Slot 7F)
    Note: Click to download a higher-resolution PDF of the MNS cable map for MR750 (IRF3 board in CAM slot 7F): PDF.
    Note: The cable connections for the 8 kW RF amplifier in following illustration are the same for both the AMT/Herley and CPC cabinets.
    Figure 33. MNS cable map for MR750/750w (PN 6250034 IXG board in CAM Slot 7F)
    Note: Click to download a higher-resolution PDF of the MNS cable map for MR750/750w (6250034 IXG board in CAM slot 7F): PDF
    Figure 34. MNS cable map for MR750/MR750w with ICE & ASC chassis
    Note: Click to download a higher-resolution PDF of the MNS Cable Map for MR750/MR750w with ICE & ASC Chassis: PDF.
  3. Reattach the support bracket to the SPW.
  4. On the upper TX switch, remove the connection from J15 of the magnet I/O, and attach the Y-cable to J123 on the upper TX switch and to J127 on the MNS TX switch (lower). Connect the other end of the Y-cable to the J15 magnet I/O connector.
    Figure 35. Y-Cable connection to magnet I/O cable
Topic ID: id_SL1871029-1054743

Restoring system power

Procedure

  1. Notify all personnel working on the system that the system is being powered up.
  2. Remove LOTO from the RF amplifier and PEN cabinet. See the MR Service Safety Manual, PN 5452735.
  3. Remove LOTO from the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
  4. Open the plastic door over the front of the PDU breakers, and switch the appropriate subsystem breakers ON.
  5. Return any individual circuit breakers that were turned off to the ON position.
Topic ID: id_SL189560-1054743

Installing spectroscopy software and configuring hardware

Procedure

  1. When the system begins to boot, do not bring up the applications. Instead, log in as root and bring up Guided Install.
    Note: It is possible that the customer changed the default password. If you cannot log in, contact the customer for the correct password.
  2. After the Guided Install window opens, select the Option Key tab.
  3. Install the MNS option key using eLicense. See Software Option Installation with eLicense Generated Keys.
    The option key delivered with the Hydrogen Only Spectroscopy Option (PROBE/SV) must also be installed.
  4. Place the rating plate on the rear of the GOC (if applicable).
  5. In Guided Install, open the Hardware Configuration screen.
    Figure 36. Guided install hardware configuration screen
  6. For Spectro RF Amp Type, select AMT. (This is the correct selection regardless if the amplifier is AMT/Herley or CPC.)
  7. Ensure all other 3.0T settings are correct for the system.
  8. Modify if necessary, and save all changes.
  9. Reboot.
Topic ID: id_SL1871048-1054743

Verifying configuration settings

Procedure

  1. At the CSD, select the Utilities tab.
  2. Select the Config File Manager, and ensure the following parameters match the definitions as stated:
    1. Spectroscopy RF Amplifier = yes to configure the MNS amplifier (amp to ready).
    2. Broadband Transceiver = yes to configure the MNS broadband transceiver (frequency change).
    3. Power Monitor Type = 4.
    4. 3T Spectro RF AMP Type = 0.
      Figure 37. Config file manager screen
  3. Click Save Changes.
  4. Click Quit to exit the Config File Manager.
Topic ID: id_SL4210640-1054743

MNS exciter calibration

About this task

The nuclei that are calibrated by default are 13C and 31P. To guarantee a linear output from the MNS exciter at other frequencies, you can edit a config file to specify which other frequency or frequencies that the site needs calibrated. This config file controls which MNS frequencies are used when calibrating the transmit gain tables of the MNS exciter. To choose frequencies to calibrate, open the config file and change the value for the desired frequencies from 0 to 1. The calibration happens during the next TPS reset or system restart. This calibration uses the loopback path only. No RF is sent to the broadband amp. The system only needs to be configured for MNS with the standard MNS hardware (exciter, cabling, etc.). It is not necessary to connect an MNS TR module during this calibration.

Procedure

  1. Note: Each additional frequency calibration will add time to the TPS reset. Calibrate only the nuclei that the site needs; do not calibrate them all.
    In a C Shell, go to the directory /w/config
    Note: The Shell window can only be launched when the EA3 user is included in the authorized EA3 group. Users not in this EA3 group will not have access to launch the Shell window. If you are not logged on as the proper logon user, log out and then log back on as the correct EA3 user with the authorized permissions.
  2. Type gedit mnsTgCal.cfgEnter
    The mnsTgCal.cfg file contains a list of available nuclei.
  3. For the nuclei that the site needs calibrated, change the value from 0 to 1.
  4. Save the file.
  5. Type more mnsTgCal.cfgEnter and confirm that the changes were saved.
    At the next TPS reset or system restart, the nuclei will be calibrated.