Hi Folks,

I understand the necessity of using a Damper to keep the arm or boom =
from oscillate or belling after a signal begins.   I would guess, after =
an earthquake signal arrives, an undamper arm would continue to =
oscillate for many minutes, overwriting most of the incoming signature.

I also understand the importance of minimizing the friction of the =
sensor's hinges.   The signals are very small and they must overcome the =
friction before any movement of the arm can take place.

My question is:  Does a Damper, oil or magnetic, not act the same as =
hinge friction?, in that, the signal must, first, overcome the =
resistance of the Damper?

Is an undamper sensor  more sensitive than a dampered sensor?    I have =
never tried this.   Again, I know the signature would be of little =
value, but I am curious about the friction of the dampers.








Hi Folks,
 
I understand the necessity of using a =
Damper to=20
keep the arm or boom from oscillate or belling after a signal=20
begins.   I would guess, after an earthquake signal =
arrives, an=20
undamper arm would continue to oscillate for many minutes, overwriting =
most of=20
the incoming signature.
 
I also understand the importance of =
minimizing the=20
friction of the sensor's hinges.   The signals are very small =
and they=20
must overcome the friction before any movement of the arm can take=20
place.
 
My question is:  Does a Damper, =
oil or=20
magnetic, not act the same as hinge friction?, in that, the signal must, =
first,=20
overcome the resistance of the Damper?
 
Is an undamper sensor  more =
sensitive=20
than a dampered sensor?    I have never tried =
this.  =20
Again, I know the signature would be of little value, but I am curious =
about the=20
friction of the dampers.
 
Thanks, Ted