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   1. Make marks on FFU switches that are not turned off in MCE, IFI, PRM, PR3, PR2, BS, SR2, SR3, SRM, OMC with "Pink Tape".
   * 4 people stand by (MCE, IFI, PRM), (PR3, PR2, BS), (SR2, SR3), (SRM OMC) FFU switchs.
   * Keep taking sensitivity of FPMI condition by a operator.
 * Turn off almost FFUs at the same time by 4 people, except for pink one.
   * Check the difference btw FFU operation and alnost-no operation. 		   1. Make marks on FFU switches that are not turned off in MCE, IFI, PRM, PR3, PR2, BS, SR2, SR3, SRM, OMC with "Pink Tape".<<BR>> (Operated FFU / Total FFU) list is,<<BR>>
 || area name ||MCE || IFI || PRM || PR3 || PR2 || BS || SR2 || SR3 || SRM || OMC ||
 || Operation/Total ||2/16||2/12 ||2/12 ||4/16 ||4/20 ||4/20||4/20 ||4/16 ||4/16 ||4/16 ||

  130 FFUs will be turned off. This corresponds to 26kW heating power.
  26kW corresponds to about two water cooler cooling ability (2 x 14kW).
<<BR>>
    1.#2 4 people stand by (MCE, IFI, PRM), (PR3, PR2, BS), (SR2, SR3), (SRM OMC) FFU switchs.
    * Keep taking sensitivity of FPMI condition by an operator.
  * Turn off almost FFUs at the same time by 4 people, except for pink one.
    * Check the difference btw FFU operation and alnost-no operation.

Plans for trial just after ER

  • Noise investigation about FFUs in the corner stations
    • Method

      1. Make marks on FFU switches that are not turned off in MCE, IFI, PRM, PR3, PR2, BS, SR2, SR3, SRM, OMC with "Pink Tape".
        (Operated FFU / Total FFU) list is,

    area name

    MCE

    IFI

    PRM

    PR3

    PR2

    BS

    SR2

    SR3

    SRM

    OMC

    Operation/Total

    2/16

    2/12

    2/12

    4/16

    4/20

    4/20

    4/20

    4/16

    4/16

    4/16

    • 130 FFUs will be turned off. This corresponds to 26kW heating power. 26kW corresponds to about two water cooler cooling ability (2 x 14kW).


  1. 4 people stand by (MCE, IFI, PRM), (PR3, PR2, BS), (SR2, SR3), (SRM OMC) FFU switchs.
  2. Keep taking sensitivity of FPMI condition by an operator.
  3. Turn off almost FFUs at the same time by 4 people, except for pink one.
  4. Check the difference btw FFU operation and alnost-no operation.

KAGRA/EngineeringRun/ER191217_24/postERtrial (last edited 2020-01-05 17:30:32 by tatsuki.washimi)