Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 40

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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.
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).
ACCESSORIES
Solid State Relays (SSRs):
K847-DC – Can switch up to 40VDC, 2 amps max-
K847-AC – Can switch up to 130VAC, 2 amp max-
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
The 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 con-
trolled 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.
SQUARE WAVE TIG 355
imum load. Package of two.
imum load. Package of two.
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