Lincoln Electric CITOTIG 315DC Service Manual page 13

turn OFF.
This sequence operation, 4-step with restart disabled,
is the default setting from the factory.
4-Step Trigger Sequence with Restart Option
To select 4-Step with restart sequence:
Action
+
See "Setup menu" section below
then:
Press several times until the LED above lights up
If 4-step restart is enabled from the setup menu the
following sequence will occur for steps 3 and 4 (steps
1 and 2 are not altered by the restart option):
Press and hold the TIG torch trigger. The machine
will now decrease the output current at a
controlled rate, or downslope time, until the Crater
current is reached.
Release the TIG torch trigger. The output current
will again increase to the Welding current, like in
step 2, to continue welding.
If the weld is completely finished, use the following
sequence instead of step 3 described above.
3A. Quickly press and release the TIG torch
trigger. The machine will now decrease the output
current at a controlled rate, or downslope time,
until the Crater current is reached and the output
of the machine is turned OFF. After the arc is
turned OFF the postflow time will start.
As shown here, after
the TIG torch trigger is
quickly pressed and
released from step 3A,
it is possible to press
and hold the TIG torch
trigger another time to
end the downslope time
and maintain the output
current at the Crater
current. When the TIG
torch trigger is released
the output will again
increase to the
Welding current, like in step 4, to continue welding.
When the main part of the weld is complete go to step 3.
As shown here, again
after the TIG torch
trigger is quickly
pressed and released
from step 3A, it is
possible to quickly
Visualization
press and release the
TIG torch trigger a
second time to end
the downslope time
and stop welding.
Bi-Level (A1/A2) Trigger sequence
The Bi-Level feature is selectable only if the "option
20" is previously enabled in the Setup Menu.
To select Bi-Level sequence:
With this sequence the arc is started as in the 4S
sequence, this means that steps 1 and 2 are the same.
NOTE: The Restart option and the Pulse function are
not available for Bi-Level Trigger sequence.
13
Action
Press several times until the LED above lights up
Quickly press and release the TIG torch trigger.
The machine will switch the current level from A1
to A2 (background current). Each time this trigger
action is repeated the current level will switch
between the two levels.
3A. Press and hold the TIG torch trigger when
the main part of the weld is complete. The
machine will now decrease the output current at
a controlled rate, or downslope time, until the
Crater current is reached. This Crater current
can be maintained as long as necessary.
Visualization