On Tuesday, November 4, 2003, at 09:48 AM, arcstarter wrote:
OK, I just bought a used diffusion pump.
Inlet is about 3 inches.
Outlet is about 1 inch.
Height is about 12 inches.
Water cooled with normally closed thermostat device on the water
jacket.
Since I don't have a spec sheet, I am at a bit of a loss as to how
to proceed. For instance, how do I determine what volume of oil to
use? The label indicates that this is an Alcatel model 6063 (which
I have looked for on the 'net but not been able to find specs on).
There are fields on the label for power, liters/minute etc but the
numbers were not inserted!
Have you tried calling up Alcatel?
The heater is also a bit of a mystery. There are apparently two
heating elements, currently wired in series but with all three leads
coming out of the can. Element one (which is physically located on
the outside edge of the heating base) measures 134 ohms. Element
two (which is located in the center of the base) measures 248 ohms,
but has heavier gauge wires than the outer heater.
Differential heating of diffusion pumps is mentioned in the literature,
to achieve a temperature gradient across the base of the stack, from
inside to outside. This is probably in support of that, although
without the technical docs, there's probably no way to tell how to
set yours up correctly.
