Seqiemce Of Operation (Block Diagram); Appendix 1: Sequence Of Operation (Block Diagram - ESAB A120 Operating Manual

APPENDIX 1: SEQUENCE OF OPERATION
ACTION:
Close external
disconnect switch.
RESULT:
Power to system.
ACTION:
Connect work cable to workpiece.
Set output amperage.
RESULT:
System is ready
for operation.
ACTION:
Protect eyes and activate
Torch switch (START)
RESULT:
Fans turn on. Gas flows briefly,
then stops.Gas restarts.
DC indicator
Pilot arc established.
ACTION:
Release Torch switch.
RESULT:
Main arc stops.
Gas flow stops after post - flow.
(Fans will continue to run for
10 minutes after the Torch switch
[START] is removed)
0-5430
(BLOCK DIAGRAM)
ACTION:
ON / OFF switch to ON
RESULT:
AC indicator ON.
GAS indicator ON
when input
pressure is adequate
for power supply operation.
Power circuit ready.
ON
Power supply fans shut off.
ACTION:
RUN /
Rapid Auto Restart /
SET / LATCH switch
to SET
RESULT:
Gas flows to set
pressure.
Torch moved away from work (while
PILOT ARC
transfer distance of workpiece.
ACTION:
ON / OFF switch
to OFF
RESULT:
All indicators off.
APPENDIX
CUTMASTER A120
ACTION:
RUN / Rapid Auto Restart /
SET / LATCH
switch to RUN
(for most applications)
or to
Rapid Auto Restart
(for gouging, trimming,
or expanded metal
applications)
or to
LATCH
is used for specific applications
(torch switch can be released
after main arc transfer).
RESULT: Gas flow stops.
ACTION:
still activated).
RESULT:
Main arc stops.
Pilot arc automatically
restarts.
ACTION:
Torch moved within
RESULT:
Main arc transfers.
Pilot arc off.
ACTION:
Unplug input
power cord or
open external
disconnect.
RESULT:
No power to system.
Art #A-07979_AB
A-1