INFICON MDC-360C Thin Film Deposition Controller - Manual (Page 123)

MDC-360C DEPOSITION CONTROLLER
CONTROLLER INSTALLATION 8-13
Figure 8-11 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-360.
Star washers are
recommended to be
use 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)