James,

To be sure we are texting about the ~ same seismometer, you might
take a peek at this PDF at:

www.yerdurumu.org/makaleler/documents/instrument.pdf

On page 38 is Figure 2.17 which ~ matches the physical vertical I have. The
manual I have calls it the "series 201", which they call the "S-5007-v".
The model designation ~ difference may only be just subtle subsequent
model changes over the years from the ~ 1950's through the 1960's
but it seems like no one has a complete collection of manuals to
compare the minor/major differences.

The manual I have is mostly the old spirit duplicator (fading purple)
text which is quite difficult to read now.  I'll try to see if I can copy
the
pages in time with my printer/scanner.  The text has a set up procedure
but it doesn't have a "trouble indications and resolutions", which can
still leave one with no recourse but to simply try what may think could
work.  Hang loose...

Till then....with this problematic guessing mass balance game;
it could be a single or a number of corrections that could be tried :

You might be trying to attain too great a period and/or, it's subject to
too much temperature variation affecting the spring.  The best period
I used in the past was 15s; periods greater than that would also
have the mass wander up or down....probably from the varying
temperatures in it's environment on the spring with contraction
or expansion of the metal.  The instrument is notorious for needing
a constant temperature casing/s insulation/s.  I had mine in a insulated
vault and with the steel covering also covered in insulation; but it would
still wander and need adjustment measured in days, or a week or two
at best.  Try raising the base rear two adjustment screws up for a shorter
period and see if that helps elongate the time from what it now is;
along with ~ heavy insulation.  The original sales "pitch", mentions
30> seconds, but it's been proven to be a nuisance; unless one likes
to adjust ~ every day or ever so number of (?) hours of the day.  As
long as the mass varies daily about the center indicator say, 3/8" varying
up and or down, that's OK, you'll still get a useful seismic signal.  I'm
not
absolutely sure, but even a 1 degree temperature change will
affect some the spring/balance at a 15s mass period, and get much
worse (larger displacement) with a longer period.

Not all models of the vertical have a sliding counter weight attachment.
One could just use small lead or coin counterweights on the boom, for minor
 finger moving balance weight adjustment without using the ~ (very) touchy
base screws adjustments.  Some model/s used a motor driven counterweight
with a photocell for remote adjustments.

It doesn't "sound" like you need to adjust the wire from the spring
to the top mechanical adjustments anymore.

I don't know what you have underneath the instrument for it too
set on (?), if it's not a reasonably solid and thick ~ stable concrete
pier, even slight movement will frequently upset the balance often
from environmental influences.

You have a very good (but old fashioned) ~ long period vertical
instrument...it's worth resolving the balance problem/s.

We'll ~ work it out...

Take care, Meredith

On Fri, Feb 24, 2012 at 2:45 PM, JAMES C ALLEN  wrote:

> Meredith Lamb, Bob or others that may have knowledge of Spregnether 5000
> Vertical Seis:
> It has been my understanding that in setting up this machine it was
> imperative to have the unit mass indicator balanced between the upper and
> lower stop, which thus far for me has been illusive .  The mass indicator
> either slowly goes to the bottom or the top.  I have adjusted the spring
> wire and still I can not get it to remain balanced between the stops.  Does
> anyone have a copy of the manual who could provide a photocopy or email the
> setup instructions included or provide any tips or suggestions.
> James Allen
>
>
>
James,

To be sure we are texting about the ~ same seismo=
meter, you might
take a peek at this PDF at:=A0
=A0
www.yerdurumu.org/makaleler/documents/instrument.pdf<=
/a>







On page 38 is Figure 2.17 which ~ matches the physical =
vertical I have. The
manual I have calls it the "series 201&=
quot;, which they call the "S-5007-v".
The model design=
ation ~ difference may only be just subtle subsequent




model changes=A0over the years from the ~ 1950's through the 1960&=
#39;s
but it seems like no one has a complete collection of manua=
ls to
compare the minor/major differences. =A0=A0


The manual I have is mostly the old spirit duplicator (fading pu=
rple)
text which is quite difficult to read now. =A0I'll try =
to see if I can copy the
pages in time with my printer/scanner. =
=A0The text has a set up procedure


but it doesn't have a=A0"trouble indications and resolutions&=
quot;, which can still leave one with no=A0recourse but to simply try what =
may think could work. =A0Hang loose...

Till then..=
...with this problematic guessing mass balance game;



it could be a single or a number of corrections that could be tried :<=
/div>

You might be trying to attain too great a period a=
nd/or, it's subject to
too much temperature variation affecti=
ng the spring. =A0The best period


I used in the past was 15s; periods greater than that would also
have the mass wander up or down....probably from the varying
temperatures in it's environment on the spring with contraction
<=
div>or expansion of the metal. =A0The instrument=A0is notorious for needing=




a constant temperature casing/s insulation/s. =A0I had=A0mine in a ins=
ulated
vault and=A0with the steel covering also covered in=A0insu=
lation; but it would
still=A0wander and need adjustment=A0measure=
d in days, or a week or two



at best. =A0Try raising the base=A0rear two adjustment screws up for a=
 shorter
period and see if that helps elongate the time from what=
 it now is;
along with ~ heavy insulation. =A0The original sales =
"pitch", mentions



30> seconds, but it's been proven to be a nuisance; unless one =
likes
to adjust ~ every day or ever so number of (?) hours of the=
 day. =A0As
long as the mass varies daily about the center indica=
tor say, 3/8" varying=A0



up and=A0or down, that's=A0OK, you'll still get a useful seism=
ic signal. =A0I'm not
absolutely sure, but even a 1 degree te=
mperature change will=A0
affect some the spring/balance at a 15s =
mass period, and get much

worse (larger displacement)=A0with a=A0longer period.

Not all models of the vertical have a sliding counter weight attac=
hment.
One could just use small lead or coin counterweights on th=
e boom, for minor


finger moving balance weight adjustment without using the ~ (very) touchy b=
ase screws adjustments. =A0Some model/s used a motor driven counterweight
with a photocell for remote adjustments.




It doesn't "sound" like you need to adjust the wire from the =
spring
to the top mechanical adjustments anymore.

<=
/div>
I don't know what you have underneath the instrument for it t=
oo


set on (?), if it's not a reasonably solid and thick ~ stable conc=
rete
pier, even slight=A0movement will frequently upset the=A0bal=
ance often
from=A0environmental influences.

<=
div>
You have a very good (but old fashioned) ~ long period vertical

instrument...it's=A0worth=A0resolving the=A0balance problem/s.

We'll ~ work it out...

T=
ake care, Meredith=A0

On Fri, Feb 24, 2012 at 2:45 PM, JAMES C ALLEN <jca=
llen1@...........> wrote:



Meredith Lamb, Bob or others that may have k=
nowledge of Spregnether 5000 Vertical Seis:

It has been my understanding that in setting up this machine it was imperat=
ive to have the unit mass indicator balanced between the upper and lower st=
op, which thus far for me has been illusive . =A0The mass indicator either =
slowly goes to the bottom or the top. =A0I have adjusted the spring wire an=
d still I can not get it to remain balanced between the stops. =A0Does anyo=
ne have a copy of the manual who could provide a photocopy or email the set=
up instructions included or provide any tips or suggestions.







James Allen