Grounding - HELIX GRANVILLE-PHILLIPS Convectron ATM Instruction Manual

Chapter 2

Grounding

Figure 2-6 Ground connection to vacuum chamber
Metal hose clamp or other metal clamp
12
If the fitting allows continuous metal-to-metal contact between the housing
base and the vacuum chamber, the module is properly grounded via the
fitting. If the fitting requires a rubber gasket, rubber O-ring, Teflon tape, or
other material that prevents metal-to-metal contact between the housing
base and the vacuum chamber, refer to Figure 2-6 and follow these
instructions to ground the module to the vacuum chamber:
a. Attach a metal hose clamp or other metal clamp to the gauge stem of
the housing.
b. Install a 3.31 mm
and a metal ground lug, bolt, or stud on the vacuum chamber.
Gauge stem
Fitting
Improper grounding could cause product failure,
serious personal injury, or death.
To reduce the risk of product failure, serious personal injury, or
death, follow ground network requirements for the facility.
• Maintain all exposed conductors at earth ground.
• Ground the module housing to the vacuum chamber as
instructed below.
• Make sure the vacuum port to which the module is mounted
is properly grounded.
2
(12 AWG) or larger copper wire between the clamp
Vacuum chamber
®
Convectron
WARNING
2
3.00 mm (12 AWG) or larger ground wire
Ground lug, bolt, or stud
ATM Vacuum Gauge Module Instruction Manual