990 CLD Autoline™ Leak Detector
2-2
DRAFT 2/2/04
Leak Detector Location and Required Services
Vacuum Technologies recommends the use of either its SD-90, SD-200, SD-300, or SD-450
helium stable mechanical pumps. Do not use a pump that exhibits helium retention
characteristics which cause high background.
The best arrangement for joining the leak detector and the mechanical pump is to use a
stainless steel or aluminum vacuum-tight manifold whose ends match and abut the NW 16
connection at the high vacuum pump.
Services required for operation include:
❑
Power 115 VAC, 50/60 Hertz, 15 A service. (Option: 230 VAC, 50/60 Hertz)
❑
Helium, welding grade, standard cylinder with pressure regulating. valve and hose.
Care should be exercised in the selection of the size of a mechanical pump because its
pumping speed is inversely proportional to the minimum detectable leak of the subsystem.
The discharge port (foreline) of the high vacuum pump requires a 16 mm KF-type fitting to
connect it to the mechanical pump.
Installation
The spectrometer tube/high vacuum pump assembly can be mounted horizontally, or
vertically with the spectrometer tube on the top of the assembly. Support rails must be
added on the sides of the main electronics console when the console is mounted in a
standard 19” rack and when rack slides are not used.
When rack slides are used, Vacuum Technologies recommends the Model CTN-1-20
non-tilt, quick-disconnect slide manufactured by ZERO Corporation, Monson, MA.
Installation of the system consists of:
1. Performing “Electrical Connections” on page 2-3.
2. “Leak Rate Output Voltage Selection” on page 2-5, if required.
3. Setting the “Leak Rate Output Voltage Selection” on page 2-5.
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