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OPTIONS/ACCESSORIES
The following options/accessories are available for
your Square Wave TIG 355 from your local Lincoln
Electric Distributor.
Undercarriage (K841) – Includes a platform, wheels,
and brackets for supporting the welder and two gas
cylinders.
Pump Mounting Platform (K827) – Mounts on top of
the welder to provide a mounting surface suitable for
water recirculating pumps.
Arc Start Switch (K814) – Starts the welding
sequence if remote control for TIG welding is not
desired. Plugs into the Remote Receptacle. The
Current Control switch must be in the LOCAL position
when using the Arc Start switch; only a minimum cur-
rent (2 amp) is available in REMOTE. Includes 25 ft.
(7.6 m) cable.
Interface Kit (K846) – Mounts to the back of the LED
status PC board. Provides six isolated circuits that
can be closed to provide status indication when each
of the following functions is active: High Frequency,
Arc Established, Start, Pulse Peak, Pulse Background,
and Crater Fill. Each circuit occupies two positions on
a terminal strip and consists of a fuse, fuse holder, and
sockets for an industry standard, optically isolated
Solid State Relay (SSR) module (purchased separate-
ly, see below).
Solid State Relays (SSRs):
K847-DC – Can switch up to 40VDC, 2 amps
maximum load. Package of two.
K847-AC – Can switch up to 130VAC, 2 amp
maximum load. Package of two.
Amptrol™ (K870 or K812) – Provides a remote cur-
rent control for most TIG welding applications. Model
K870 is a foot operated control; model 812 is hand
operated. Both models plug into the remote control
receptacle. A separate switch on the Amptrol starts
the welding sequence. When the Current Control
switch on the welder is set in the LOCAL position, the
Amptrol works as an arc start switch only; it does not
control current. (Current is controlled by the rheostat
on the front panel.) When the Current Control switch
on the welder is set to the REMOTE position, current
is controlled by the Amptrol, in a range from 2 amps up
to the current set on the control panel. For a more
detailed explanation of Amptrol operation, see the
Operation Section of this manual.
ACCESSORIES
C-2 C-2
SQUARE WAVE TIG 355
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1
Use of the Synergic 7 wire feeder requires appropriate input cable assembly, wire stand, and drive roll kit. Refer to Synergic 7 Operator’s
Manual for available options.