Operation; Product Description; Recommended Processes And Equipment; Welding Capability (Duty Cycle - Lincoln Electric PRECISION TIG 185 SVM169-A Service Manual

B-3

PRODUCT DESCRIPTION

The Precision TIG 185 is a member of our field
acclaimed Precision TIG family of industrial arc weld -
ing power sources. Premium features include:
1. Precise constant current output.
2. Full range square wave AC/DC TIG (GTAW) weld--
ing.
3. Enhanced version of
Start™Technology for its lower Minimum(5 amps) to
higher Maximum (185 amps) output control range.
4. Built-in high frequency stabilization for DC TIG start-
ing and continuous AC TIG welding.
5. AC/DC Stick (SMAW capability.) A new undercar-
riage (with gas bottle rack) is available for field
installation, or is included with an available Ready-
Pak TIG Welding Package. The Precision TIG
patented convenient built-in storage provisions for
welding components and cable management.
The Precision TIG 185 also provides advanced fea-
tures such as:
• Digital Meter
• Presettable control, adjustable Auto Balance™
• Fan As Needed (F.A.N.)
• Timers for fixed Preflow and variable Postflow shield-
ing gas.
• Built-in, easy to set single knob Pulse TIG control with
a "blinking" light to indicate the pulse frequency set-
ting.
• Auto-Sense remote control selection.
• Tool-less Twist-Mate electrode cable connection.
• Built-in work clamp cable permanently attached.
Four models are available for 60Hz. with Domestic and
Canadian input voltages, as well as an International
model with 50/60Hz voltages.
RECOMMENDED PROCESSES AND
EQUIPMENT
RECOMMENDED PROCESSES
The Precision TIG 185 is recommended for the TIG
(GTAW) and Stick (SMAW) welding processes within
its output capacity range of 5 amps DC,or 7 amps AC,
to 185 amps AC/DC. It is compatible with most
Magnum TIG accessories, as well as many industry
standard items, such as TIG torches (adapted for
Twist-Mate), hoses, and water coolers.
PROCESS LIMITATIONS
The Precision TIG machines are not recommended for
arc gouging due to it's limited output capacity, and are
also not recommended for pipe thawing.

OPERATION

the patented Micro-
PRECISION TIG 185
RECOMMENDED EQUIPMENT/INTERFACE
(See Installed Options in Accessories Section for
more details)
The Precision TIG 185 will be available as a basic
Machine (Only) and in two Factory-Configured Welding
Packages:
1. Machine(Only) (K2345-1)
2. Ready-Pak (K2347-1)
3. Ready-Pak w/Cart (K2347-2)
Basic module will also be available as with Domestic,
Canadian and International input voltages for user con-
figuration, with optional accessories.
Select Machine 208/230/1/60 Machine with 6 NEMA 6-50P
Plug Cable and Receptacle (K2345-1)
460/575/1/60 Machine only with cable (K2345-2)
380/400/415/1/50/60 Machine only
with cable (K2346-1)
Torch Starter Kit Air Cooled System:
(Select one) TIG-Mate
Torch Starter Kit*
Water Cooler Not Applicable
Under-Storage
Cart (Optional )
Optional Remote
Trigger Device
(Select one)
*
For "Part Numbers" or "K Numbers" see Accessories Section.
EQUIPMENT LIMITATIONS
The Precision TIG machines are protected from over
loads beyond the output ratings and duty cycles, per
the Specifications in the Installation Section, with
Thermostat protection of the output power coils and
rectifiers.
The PRECISION TIG 185 machine uses Twist-Mate
output terminals, therefore stud connection adapters
(such as LECO. S19257-series) cannot be used for
torch connection.
If a Precision Tig 185 is powered from an engine gen-
erator which doesn't have sufficient capacity, the AC
Balance control and the Output control will not provide
full range of control.
WELDING CAPABILITY(Duty Cycle)
The PRECISION TIG 185 is rated at 185 amps, 27
volts, at 15% duty cycle on a ten minute basis. It is
capable of higher duty cycles at lower output currents.
See rated output graph, on specification sheet located
in the Installation Section. If the duty cycle is exceed-
ed, a thermal protector will shut off the output until the
machine cools.
B-3
Water Cooled System:
TIG-Mate 20
Torch Starter Kit*
115V 50/60Hz
Cool-Arc 40*
K2348-(*)
Arc Start Switch*
Foot Amptrol*
Start Pedal Foot Amptrol*
Hand Amptrol*