Model 3710 Plasma Control Console
Operator’s
Manual
_____________________________________________________________________________________________________________________
Issued: 03/11
Page
51
A1.4 Test purging circuit for proper function: slowly decrease
the air pressure to verify that system shuts down.
A1.5 Open front console door to verify that the door interlock
interrupts all power.
A1.6 Close the door and re-energize the console.
A-2. Leak Testing
Inspect the 3710 plasma console gas system for leaks.
Praxair Surface
Technologies
RECOMMENDS
Helium is preferred for testing due to its small molecular size. Argon or
nitrogen gas are acceptable if helium is not available.
These tests are to be performed by qualified personnel only!
EXPLOSION HAZARD -- Air purge system must be connected and
operating properly to avoid possible accumulation of flammable
gases. Purge system for at least five minutes before starting
procedure.
Test ONLY with inert gases (helium, argon or nitrogen)! DO NOT
test with combustible or oxidizing gases!
•
Collected gases present an asphyxiation risk. Work with suf-
ficient, active ventilation to assure airflow.
•
Fumes and gases can harm health or create potential fire
hazards.
•
Examine all hoses before starting test procedure. Replace
cut, burned, worn or damaged hoses.
•
Be sure console area is free of open flame, potential spark
creating devices or heat-generating devices.
•
Follow all lockout/tagout procedures when disconnecting
power.
