In a message dated 30/05/2009 22:31:46 GMT Daylight Time,  
gmvoeth@........... writes:

Hello  PSN;

Just out of curiosity has any of you guys with
those garden  gate seismometers ever put one
of these little plastic levels on the  lever
to see just how far off level it is at
10 or 20 seconds. I mean  here like 1/2,
1/4 or so a bubble across the line
if you understand what  I mean here ?

Maybe it is not even crossing the line
but you can see  possibly its off level
and just touching the reference line ?

They  got these fish eye levels that just tell you
the horizontal and I thought  that that might help set
up your period ??

Has anyone ever seen a  cheap calibrated level
that will tell you fractions of a degree
off  level ?

Metrology, I have always thought, would be
a good profession  to be in. :-)










In a message dated 30/05/2009 22:31:46 GMT Daylight Time, 
gmvoeth@........... writes:
Hello 
  PSN;

Just out of curiosity has any of you guys with
those gard=
en 
  gate seismometers ever put one
of these little plastic levels on the=
 
  lever
to see just how far off level it is at
10 or 20 seconds. I=
 mean 
  here like 1/2,
1/4 or so a bubble across the line
if you understan=
d what 
  I mean here ?

Maybe it is not even crossing the line
but you=
 can see 
  possibly its off level
and just touching the reference line ?

=
They 
  got these fish eye levels that just tell you
the horizontal and I tho=
ught 
  that that might help set
up your period ??

Has anyone ever see=
n a 
  cheap calibrated level
that will tell you fractions of a degree
of=
f 
  level ?

Metrology, I have always thought, would be
a good prof=
ession 
  to be in. :-)