INFICON MDC-260 Thin Film Deposition Controller - Manual (Page 112)

MDC-260 DEPOSITION CONTROLLER
CONTROLLER INSTALLATION 8-12
IMPORTANT!
RECOMMENDED GROUNDING METHOD
Figure 8-10 Recommended Grounding Method
1. As shown, sink two grounding rods
into the earth approximately six feet
apart. Locate these rods as close as
possible to the vacuum cabinet.
2. Measure the resistance between
the rods. If the resistance is greater
than 3 Ohms, consult an Electrician
specializing in grounding systems. If
the resistance is 3 Ohms or less,
connect a length of copper grounding
strap to the system’s central
grounding point, which should be
somewhere on the vacuum system.
3. Silver solder the other end of this
grounding strap to the rods. Do not
rely on mechanical connections.
Bolt copper strap to
ground lug of the
MDC-260.
Star washers are
recommended to be
used between the
front panel mounting
angles and the rack.
The star washers will
cut through the paint
providing four
additional ground
points between the
MDC and the
instrument rack.
System Grounding Point
Bolt copper straps to
clean, bare metal.
Copper straps should be
as wide as practical,
preferably a 1’’ wide
copper sheet or braid.
Building Floor
Grounding Rods, 6 ft.
apart copper-clad steel,
¾” dia. X 8 ft. (minimum)