| Your personal background. |
|---|
While utility companies may service distant areas, there are times when the power goes
out and it will take a while before service is restored. However, let it sit at atmosphere for any length of time, and all those
undesirable nooks and crannies will fill up again, or water vapor will get stuck on surfaces.
Water or oil test. If there's a way to rinse
the inside of the turbo pump with alcohol or some other
solvent without requiring replacement of the lubrication oil
I might try that eventually. My initial assumption was contamination inside the turbo
pump and elsewhere from just sitting around for several
years in the corner of a lab without as far as I
can tell, even a dust cover for protection. Since the foreline
pressure is higher than what might be optimal using a two-stage mechanical pump, the final vacuum might not reach the turbo pump's 10-8 Torr (with Viton seals) rating.
Epoxy/Torr Seal might also work but not being solvent based, it
won't solidify immediately and there is a risk that it will just
get sucked through the hole to reappear inside
your vacuum vessel! If you have had your existing machine for quite a few years, it
might just be the time for that long overdue makeover.
While the running time of the turbo pump for these tests has been only 1/2 hour or so,
the results are probably a positive sign that the explored Universe
is safe from destruction for awhile at least. Just because the words "vacuum" and "pump" are in the listing doesn't mean it will
be useful for a laser! But if left for awhile at 1 atm,
it will have to go through the long drawn out pump down cycle again. However, note that
very small leaks (by the macroscopic standards most people are familiar
with) can result in mediocre performance even for these low to medium
vacuum systems even if your pump can go down to 0.1 micron.
However, this may not be too effective for very small leaks.
Kreuger J, Peterson M, Lundgren E (1999) Agricultural inputs of pesticide residues to stream and pond sediments in a small catchment in southern Sweden. A high foreline pressure will directly
affect the ultimate partial pressure of low molecular weight gases like hydrogen and helium due
to their relatively poor compression ratio. Use of inappropriate materials for seals and tubing can of course also
result in poor performance. This is pretty easy where flexible tubing
is used to connect components (just pinch the tubing).
Even a short length of tubing or a single threaded fitting
can trap a lot of contaminants which will become a pregressively greater
problem at pressures below a few hundred microns.
Filling the system with dry nitrogen or even dry air and keeping it sealed during
periods of non-use should solve the problem. Our experts
will diagnose the problem and carefully explain the issue
to you.
Don't place the really dirty dishes in short cycle as they will not be cleaned
thoroughly. These are cases which need other equipment in repairing, and unless you
are a professional, you will not have the ability to fix it.
These are some of the solutions that you can use to fix the leaking
garbage disposal. You can find out from several
companies whether or not it will cost more to fix than buy a new one.
The longer it sits at 1 atm (even if closed off to ambient conditions), the longer it will take.
For example, a microcrack in the turbine motor rotor or elsewhere in the foreline section of the turbo pump that
traps enough air when at 1 atm to slowly outgas during pump down. In another few seconds, the reading on the CVT-16 stopped decreasing at 2 microns (with the turbo continuing to increase speed) and the NV-8B was pegged off scale.
Pressing the "Standby" switch on the TCP-040 reduces the turbo pump
speed to about 60,000 rpm (2/3rds scale on the meter) which
is still way more than I need at the moment.
However, the idea of someone having dumped their
Chinese lunch special leftovers into the turbo pump doesn't feel right.
My site "http://Www.bonniesdelights.com/index.php?a=stats&u=kylecommons693 |
| Your feedback on this profile |
|---|
| Recommend this profile for User of the Day: |
I like this profile |
| Alert administrators to an offensive profile: |
I do not like this profile |
|
| Account data |
View |
| Team |
None |
|