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SECTION 4 SYSTEM:
OPERATION
4.01
Front Panel Controls / Features
See Illustration for numbering Identification
1. Output Current Control
Sets the desired output current. Output settings
up to 60 Amps may be used for drag cutting (with
the torch tip contacting the workpiece) or higher
for standoff cutting.
2. Function Control
Function Control Knob; Used to select between
the different operating modes.
SET
Used to purge the air through the unit
and torch and leads and to adjust gas pressure.
RUN
Used for general cutting operations
RAPID AUTO RESTART
restarting of the Pilot Arc for uninterrupted cutting.
LATCH
cuts. Once a cutting arc is established, the torch
switch can be released. The cutting arc will remain
ON until the torch is lifted away from the work
piece, the torch leaves the edge of the work piece
the torch switch is activated again or if one of the
system interlocks is activated.
3. ON OFF Power Switch
ON
/ OFF
Switch controls input power to
the power supply. Up is ON, down is OFF.
4. Air/Gas Pressure Control
The Pressure
"SET" mode to adjust the air/gas pressure. Pull
the knob OUT to adjust and push IN to lock.
5.
AC Indicator
Steady light indicates power supply is ready for
operation. Blinking light indicates unit is in pro-
tective interlock mode. Shut unit OFF, shut OFF
or disconnect input power, correct the fault, and
restart the unit. Refer to Section 5 for details.
Manual 0-5389
Allows for faster
Used for longer hand held
+
Control is used in the
1
MIN
5 6 7 8 9
6.
Temp Indicator
Indicator is normally OFF. Indicator is ON when
internal temperature exceeds normal limits. Let
the unit cool before continuing operation.
7.
Gas Indicator
Indicator is ON when minimum input gas pressure
for power supply operation is present. Minimum
pressure for power supply operation is not suf-
ficient for torch operation.
8.
DC Indicator
Indicator is ON when DC output circuit is active.
!
9.
Fault Error Indicator
Indicator is ON when Fault circuit is active. See
Section 5 for explanations of fault lights.
10. Pressure Indicators
PSI
BAR
MAX
MAX
90
6.3
85
5.9
80
5.5
75
5.2
70
4.8
65
4.5
MIN
MIN
The Indicators will illuminate according to the
pressure set by the Pressure Control Knob (num-
ber 4).
OPERATION
ESAB CUTMASTER 120
2
3
4
A
MAX
PSI
BAR
MAX
MAX
+
MIN
MIN
!
Art# A-07886
10
4-1
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