INFICON Cygnus Thin Film Deposition Controller - Manual (Page 147)

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Cygnus Operating Manual
6.1.3 Control Unit Installation
The control unit is designed to be rack mounted. It may be also used on a table.
The controller is forced-air cooled, with the air flow exiting the rear of the unit for
clean room convenience.
It is generally advisable to centrally locate the controller, minimizing the length of
external cabling. Sensor board to XIU cables are available in lengths of 15’ (4.6 m),
30’ (9.2 m), 50’ (15.3 m), and 100’ (30.5 m).
6.2 Avoiding Electrical Interference
Careful consideration of simple electrical guidelines during installation will avoid
many problems caused by electrical noise.
To maintain the required shielding and internal grounding and ensure safe and
proper operation, the instrument must be operated with all enclosure covers,
sub-panels and braces in place and fully secured with the screws and fasteners
provided.
NOTE: When using Cygnus with an RF sputtering system, the cable between
Cygnus and oscillator should be kept as far away from the RF transmission
cable as possible. Interference from the RF transmission cable may cause
an erroneous crystal fail.
6.2.1 Verifying/Establishing Earth Ground
If a ground must be established, the following procedure is recommended:
 Where soil conditions allow, drive two ten foot copper clad steel rods into the
ground six feet apart. Pour a copper sulfate or a salt solution around to improve
the ground’s conduction. A near zero resistance measurement between the two
rods indicates earth ground is achieved.
 Keep connections to this grounding network as short as possible.