In a message dated 22/09/2006, JohnJan@........ writes:

>We  just got an ev17 force balance seismometer (electrotech) in here, 
>and  don't know how to connect it correctly. Seems there is only one 
>input  (500 ohm resistance), the other input is a short.



Hi there,
 
    There are EV-17 references on psn. Try typing EV-17  seismometer into 
google.
    As far as I can remember the EV-17 was a 1 Hz  geophone type with a 
calibration coil, not a full force balance system.
    _http://www.seismicnet.com/psnlist/020128_160720_1.html_ 
(http://www.seismicnet.com/psnlist/020128_160720_1.html) 
    _http://www.seismicnet.com/psnlist/020128_171420_1.html_ 
(http://www.seismicnet.com/psnlist/020128_171420_1.html) 
 
    Regards,
 
    Chris Chapman






In a message dated 22/09/2006, JohnJan@........ writes:
<=
FONT=20
  style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>>We=20
  just got an ev17 force balance seismometer (electrotech) in here, 
>=
and=20
  don't know how to connect it correctly. Seems there is only one 
>in=
put=20
  (500 ohm resistance), the other input is a short.
<=
/DIV>

Hi there,
 
    There are EV-17 references on psn. Try typing E=
V-17=20
seismometer into google.
    As far as I can remember the EV-17 was a 1 Hz=20
geophone type with a calibration coil, not a full force balance system.
    http://www.s=
eismicnet.com/psnlist/020128_160720_1.html
    http://www.s=
eismicnet.com/psnlist/020128_171420_1.html
 
    Regards,
 
    Chris Chapman