5-4
OPERATION
HT4001 Instruction Manual
CONTROLS AND INDICATORS (Cont.)
Gas Console (Fig. 5-3)
•
PLASMA N
2
/O
2
Toggle Switch (S1)
Selects the use of either nitrogen or oxygen as the plasma cutting gas.
•
Test Preflow / Run / Test Cut Flow Toggle Switch (S2)
Test Preflow - Used when setting the plasma gas preflow flow rates on the flow meters
as specified in the
Cut Charts . In this position the contactor is disabled.
•
N
2
(FM1) and O
2
(FM2) flow meters - In test preflow, indicate the percentage of
plasma gas flow, nitrogen or oxygen/nitrogen mix, required for pre-cut conditions.
•
N
2
Preflow (MV2) and O
2
Preflow (MV3) metering valves - Adjusts plasma gas
preflow.
Test Cut Flow - Used when setting the plasma gas cut flow rate on the N
2
or O
2
flow
meter for cutting conditions as specified in the
Cut Charts . In this position the contactor
is disabled.
•
N
2
(FM1) or O
2
(FM2) flow meter - In test cut flow, indicates the percentage of
plasma gas flow, oxygen or nitrogen, required for cutting conditions.
•
PLASMA Cut Flow motor valve (MV1) (Activated by momentary switch) - Adjusts
plasma gas test cut flow.
Run - Enables the contactor and the subsequent firing of the arc after the gas flow rates
have been set in the Test Preflow and Test Cut Flow positions and the H
2
O Injection
(torch water injection) as described below has been set.
•
H
2
O Injection flow meter (FM3) - Indicates the percentage of injection water flow as
indicated in the
Cut Charts.
•
H
2
O Injection metering valve (MV4) - Adjusts injection water flow as indicated in the
Cut
Charts.
Summary of Contents for HT4001
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