INFICON MDC-260 Thin Film Deposition Controller - Manual (Page 101)

MDC-260 DEPOSITION CONTROLLER
CONTROLLER INSTALLATION 8-1
8. CONTROLLER INSTALLATION
8.1 MOUNTING
The MDC-260 is intended for either rack mounting or desktop usage. When rack
mounting, it should be mounted at approximately eye level for maximum
operating ease. If the MDC-260 is mounted in a rack containing other heat
generating equipment, care should be taken that there is adequate ventilation to
assure that the ambient temperature does not exceed the MDC-260’s ambient
temperature rating.
8.2 PROPER GROUNDING
The MDC-260 was designed for maximum noise immunity and in most cases will
require no special grounding precautions. In the event that noise sensitivity is
noted in unusually noisy environments, more attention to proper grounding may
be required. It is important that the rack in which the MDC-260 is mounted is
tightly grounded to the vacuum station. This grounding is best accomplished by a
multipoint mechanical connection through the structure itself or through
grounding straps. Grounding straps should be as wide as practicable, preferably a
1” wide copper sheet or braid.
A small diameter copper conductor does not create an effective ground.
Although the D.C. resistance measured with such a connection may be low, the
inductance can be high allowing rapidly changing currents to create large
potential differences over the length of the ground wire. Multiple current paths
significantly reduce the inductance, and since the inductance of a conductor is
inversely proportional to it’s radius, wide straps will have the lowest inductance.
In particularly noisy environments it is desirable to ground the MDC-260 to the
rack frame, or other good ground, by means of a grounding strap connected to the
grounding lug provided on the rear panel.
8.3 EXTERNAL CONNECTIONS
Most external connections are made through the rear panel (See Figure 8-4). The
Remote Power Handset connector and a temporary USB connection are, however,
located on the front panel (Figure 8-3).
8.3.1 POWER ENTRY MODULE
The power entry module is an internationally approved type. It provides
connection to the power source and a protective ground. Two fuse holders,
voltage selection wheel and RFI filter are part of the power receptacle assembly.
The power plug must be removed to change the fuses or the voltage selection
wheel position.