NPB Cryogenics Systems Status.
Clearly not all of this information is for everyone, but I think at
one of the items applies to everyone. Please scan the topics for those
pertinent to you.
This is information that I believe is true and current. It is
intended to be policy or the final word of or for the department
of physics. I hope you find it useful.
The gaseous nitrogen line is set to approx. 30 psig. It is available
can be used. There is a restriction in the feed line that will cause
whole piping system to drop to a lower pressure for everyone if there
too much demand. It is an intentional restriction for safety and to
the supply tank from being emptied if a line should break or if someone
leaves a valve open. Flowmeters and restrictions in individual service
corridors exist as well, so that excessive use by one lab will effect
a few other labs not everyone.
You need to have someone in Cryogenic
Services or your PI to train you before you can do nitrogen
The fill port is located inside the locked aluminum box mounted on the
loading dock wall. You need to get a key for your lab if someone else
already done so. There is a data entry terminal in the black
to the LN2 fill port. Please enter all LN2 fill data directly into the
if there is any problem with this new system. A 160 liter dewar
is in room B123 for filling small 1 to 25 liter dewars and proper
training by Cryogenic Services or your PI is required before you are
authorized to use it.
We are now collecting all recovered gas at the NPB.
The dewar storage area is in room B123. A request form and helium
use guidelines are posted near the B123 door. Dewar
be posted outside that room. E-mail
requests are also accepted. Always take the dewar
with the lowest level, from which you can get a complete transfer. Please
return unused dewars to room B123 as soon as you are done with them,
or not. If you store a dewar in your lab, you will be billed
boil-off while it is in your lab. The liquefaction equipment is in the
NPB, and we have a truck for transporting dewars to remote users.
It is operational. Unregulated it is pressurized to 120 psig. If you do
not have a regulator on your line in the lab and you plan to use
air you should get one. OSHA regulations require that compressed air
blowing off parts, or equipment or other debris removal uses be
to under 30 psig. Be cautioned; I have seen lots of water in the
It is operational. Immediately report any natural gas odors to the
University Police Department (UPD) at 392-1111.
It is to be used for the exhaust outlet of vacuum pumps. All vacuum
should be connected to it. Please contact
us before you connect anything else. It has an air handler on
that will draw air into the pipes in each lab and out one of the stacks
on the roof. It is operational.
Chilled water / Process water:
These are two separate
systems. Please get used to calling them by their
existing names. The process water is cooled by the chilled water. The
water is used mostly for air conditioning. The process water is to be
by the labs for cooling equipment. It is a recirculating, bypass
system of domestic water treated with an inhibitor and a green dye in
PVC and copper pipes. We are not allowed to run cooling water into
drains. The supply is approx. 45 psig and the return is approx. 15
psig. It is now 62 degrees F. All of these change as the labs load
it up. It is quite common for the supply and return pipes to be
Vendor owned Gas Cylinder tanks:
A small collection of helium cylinders is set up in B123 for lab use.
any other gasses, please let
us know what you need a few days before you need it. Please
on the clipboard for the ones you take . Please return empties to the
room but to the empties rack. Make sure all cylinders are secured with
straps or chains and that empty returned cylinders have their caps.
A single 35 KVA RMG motor generator is on-line and fully operational
the labs. Load coordination will have to be done. Typically you will
in your lab twist lock outlets labeled UPS. Some are 120 VAC some are
VAC. Please be prepared to have a list of your equipment that is
by UPS and its power consumption.
A 350 KW diesel generator is operational. It is in the hands of PPD for
maintenance and monitoring. It is a standby generator. It only runs
power is lost. There will be a 5-15 second period when there is no
except from the UPS system when utility power goes out. Typically all
supplied power is labeled with an "X" somewhere in the designator, or
switch or outlet is red. The red switch in your lab operates the lights
that will relight when the generator runs during a power outage. I
load managing will need to be done. The lab emergency generator power
shared with the building's emergency power systems (fire systems,
Not to be confused with;
Isolated power outlets:
Typically they are orange and are fed from a panel labeled IPP. From
I have seen, these are isolation transformers, NOT isolated ground
You need to know the difference. I think one or two labs actually have
isolated ground transformers and outlets. There is a 100 AMP circuit
in each IPP that looks like it is the main for the panel. It is not. It
is not wired to anything. The main for the whole panel is the 30 AMP
at the bottom with a little white "main" label. The manufacturer had a
Technician replace parts in the transformers because of a electrical
in an internal circuit board. They still do not seem to work and at
one of the repaired units has failed again.
In each lab there are typically three switches near a door to operate
room lights. The three switches are for a reason. One of them operates
the "normal room lights". One of them operates incandescent lights. And
the red switch operates the "emergency lights". In the event of a power
outage, only the red switched lights will relight when the emergency
is running. Therefore, I strongly recommend that you always leave the
switch lights on, so that you don't have to go stumbling in the dark to
find the switches. Turn the normal lights on and off as you enter and
a room. Do not use the incandescent lights at all. Keep them off. They
provide almost no light and they are wasteful and hot. They are to be
only for low noise experiment requirements.
The Loading Dock:
Shipping and Receiving is in B100. There are sometimes small carts in
room for moving packages to your area, but please return the cart asap.
A palette jack and hand truck area available in the machine shop to
out. Cryogenics has a mostly broken pallet jack that can be borrowed,
please ask for it before you take it and please return it promptly. We
also have small hand fork and plate lifts that can be borrowed as well
as a 3000lb capacity electric indoor forklift that we are willing to
for anyone who requires a big lifting capacity in the NPB. The
has acquired a "real" Fork truck for moving the big stuff, but OSHA
only certified drivers be allowed to operate it. Contact the Machine
with your forking needs.
Please do not park personal vehicles in the loading
dock area during
business hours (7:00 am to 5:00 pm). They will be towed. Please
the physics vehicles in their assigned spaces. The Traffic and Parking
Department has painted the parking and no parking zones in the loading
dock area. The Physics Department Main Office has a permit pass for one
reserved space. There are
two reserved spaces out back for vendors and two more for Service
If you smell a foul odor in your lab that
is new and smells like natural
gas odor, or the neighboring sewage treatment plant, but doesn't go
your best bet is to pour approximately one gallon of water into all of
your floor drains. When unused floor drain traps dry out, the sewer
gets sucked up into the lab. If you are unsure and smell a natural gas
odor, leave the area immediately and call 392-1111 on a phone outside
of that effected area to report the odor.
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