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VIS (EY)
ryutaro.takahashi - 18:59 Thursday 11 April 2024 (29199) Print this report
Comment to Re-cabling of BF damper (29003)

I checked the resistance and inductance of the LVDT coils for the BF damper at the feedthrough flange with the flip cable.

  Before O4a This time

1 BF DPCH

1-6

2-7

3-8

4-9

5-G

 

27.8Ω/1.069mH

25.5Ω/1.064mH

26.0Ω/1.057mH

OL

 

 

29.5Ω/1.071mH

28.5Ω/1.062mH

33.1Ω/1.062mH

~40MΩ

~30MΩ

2 BF DPCV

1-6

2-7

3-8

4-9

5-G

 

24.9Ω/1.064mH

25.7Ω/1.064mH

25.3Ω/1.059mH

OL

 

 

26.3Ω/1.063mH

30.7Ω/1.064mH

27.1Ω/1.061mH

~40MΩ

~20MΩ

3 BF DSCH

1-6

2-7

3-8

4-9

5-G

 

25.7Ω/8.57mH

26.4Ω/8.61mH

24.7Ω/8.56mH

OL

 

 

28.3Ω/8.57mH

28.9Ω/8.61mH

28.3Ω/8.56mH

~40MΩ

~50MΩ

4 BF DSCV

1-6

2-7

3-8

4-9

5-G

 

25.3Ω/8.54mH

25.7Ω/8.53mH

24.5Ω/8.55mH

OL

 

 

29.0Ω/8.54mH

29.5Ω/8.54mH

27.4Ω/8.55mH

~50MΩ

~40MΩ

 

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