2 connections to earth ground – INFICON Composer Gas Concentration Controller User Manual

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Composer Operating Manual

1.10.3.2 Connections To Earth Ground

The ground connection on the Controller is a threaded stud with a hex nut. It is
convenient to connect a ring terminal to the ground strap, thus allowing a good
connection with easy removal and installation. The ground connection to the
Transducer may be made to any one of four 1/4"-20 mounting holes. See

Figure

1-3

for the suggested grounding scheme. This method ensures that no ground

potential may exist between the controller and the transducer. In many cases,
a braided ground strap is sufficient. However, there are cases when a solid
copper strap (0.030" thick X 1" wide) (0.08 cm x 2.5 cm) is more suitable
because of its lower RF impedance.

Figure 1-3 System Grounding Diagram

When used with RF powered systems, the grounding scheme may have to be
modified to optimize the specific situation.

CAUTION

An external ground connection is required to ensure
proper operation, especially in electrically noisy
environments.

Back Panel

Transducer

Ground
Stud

Earth Ground

Reactor

Any Mounting

Hole, 4 Available

1/4"-20