Model 3710 Plasma Control Console
Operator’s
Manual
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Issued: 03/11
Page
53
A3.5 Energize console main power. Press the WATER ON a
switch. The light illuminates, indicating when water flow
reaches 5 gpm (19 l/min.) or more, and the water pump
rotates.
A3.6 Press ARC GAS switch. Slowly turn test manifold
regulator handle clockwise to increase pressure.
A3.7 Open the test manifold valve and slowly rotate the
regulator clockwise to increase the pressure to 100 psi (690
kPa), as indicated by the pressure tester). Rotate the
primary and secondary console regulators clockwise to 100
psi (690 kPa).
A3.8 Turn the gas supply OFF at the test manifold main valve
and rotate both console regulators an additional one-half
turn clock-wise to balance input and output pressures.
Maintain console power to keep solenoid valves open
during testing. Note the pressure indicated on the tester and
observe the pressure reading periodically over a 15 minute
period.
A3.9 A pressure decrease of 0.3 psi or more at any time in the
15-minute time period indicates a leak. Refer to section 4,
locate and correct the leak. A pressure drop on both gauges
indicates a leak in the primary gas circuit. A pressure drop
on the secondary gauge only indicates a leak on the
secondary gas circuit. Keep gas connected after this test to
satisfy the arc gas pressure switch safety.
A-4. Pressurized Gas Leak Test: Carrier Gas
EXPLOSION HAZARD -- Be sure the testing gas supply tank/line
has a safety over-pressurization relief valve installed. Perform this
test only after completing step 1.1 to prepare the system for testing.
A4.1 Turn the gas supply OFF at the test manifold and relieve
pressure from previous testing (if any).
A4.2 Press the carrier gas switch. Switch light illuminates when
the solenoid energizes. Increase carrier gas regulator
pressure to 100 psi (690 kPa), as indicated by the pressure
tester.
