Longevity TIGWELD 250 EX User manual

Operating Manual
for
250 Amp AC/DC Pulse IGBT TIG Welder With PFC Technology

TIGWELD®250 EX
www.longevity-inc.com 1
Table of Contents
Table of Content
Pg. 1
Thank you From LONGEVITY
Pg. 2
Warranty/Shipping Damage/Order Information
Pg. 3
Safety Information
Pg. 4-5
Specifications and Ratings
Pg. 7-8
Main Unit Knob/Button/Function Diagram
Pg. 9-10
TIG Pulsing
Pg.11
TIG Section: Torch Assembly
Pg. 12
Selecting the Right Tungsten
Pg. 13-14
Selecting the Right Filler Rods
Pg. 15
Argon Regulator Installation
Pg. 16
Basic TIG Operation
Pg. 17-20
Basic Stick/Arc Welding Operation
Pg. 21-25
Routine Maintenance
Pg. 26
Troubleshooting
Pg. 27
THANK YOU!

TIGWELD®250 EX
www.longevity-inc.com
We, at LONGEVITY, want to thank you for purchasing our product. You are almost ready to
experience Longevity Welding first hand. Longevity definitely appreciates your business and
understand that this equipment may be overwhelming to setup and operate so we have prepared a
manual that will assist you in understand your new plasma cutter/welder. If you have any
questions during or after reading this manual, please feel to contact us! Please take a moment to
register your product on our website at www.longevity-inc.com or www.lweld.com
Once again, thank you for choosing Longevity as your main welding supplier!
Longevity Global, Inc
23591 Foley St
Hayward, CA 94545
Toll-Free Customer Support: 1-877-LONG-INC / 1-877-566-4462
Website: www.longevity-inc.com
Sales: [email protected]
Customer Service: [email protected]
Dealers: [email protected]
Complaints: [email protected]
Please join our welding forums to share welding tips and tricks, to receive useful information
from customers who also use our products, and to be a part of the Longevity™ welding
community at www.freeweldingforum.com

TIGWELD®250 EX
www.longevity-inc.com 3
Warranty
LONGEVITY Plasma Cutters, Welders, and Multi-Purpose Welders are covered for specific Parts
and Labor warranty at our facility. For detailed information regarding your specific LONGEVITY
welder or cutter, please view our Terms and Policies page on our website at the following website
link: http://www.longevity-inc.com/terms/
Shipping Damage
Your machine is insured against damage during shipping. Keep all packing materials and containers
in case machine must be returned. We will initiate a claim with the shipping company to cover
damage or loss. If there is shipping damage upon opening your package, our customer service team
will work with you to get the matter resolved.
In Warranty Service
Customers, who own machines that are in warranty and require service, should contact our Warranty
Department by email at hel[email protected] to obtain a return authorization code. In addition to
the warranty we offer, we would like for you to register your product on our website at
www.longevity-inc.com/resources. Remember, warranty starts from the date of purchase. For your
convenience, write your order information below so you can track your order in case you need
warranty work.
Order No.: _________________________________
Date of Purchase: _____________________________
Warranty Period: ______________________________
Out-of-Warranty Service
Customers, who own machines that are out of warranty and require service, should contact us for an
estimate. Longevity offers an exchange program on out of warranty units. We also help non
LONGEVITY customers with repairs, replacement, and service.
If your unit is not manufactured by Longevity and you cannot receive service from your manufacturer or
seller, Longevity will lend out hand. Our warranty policy is also available for all plasma cutters and
welders. For more information, please email us at
[e-mail]

TIGWELD®250 EX
www.longevity-inc.com
Warnings and Safety
Welding and plasma cutting may be dangerous to the operator and to bystanders, if the
equipment is not operated properly. Welding or cutting must be performed in accordance
with all relevant safety regulations. Carefully read and understand this instruction manual
before installing and operating this equipment.
Changing function modes during welding may damage
equipment.
Before welding, disconnect the electrode-holder cable
from the equipment.
A circuit breaker is required to prevent electrical
overload of the equipment.
Only high quality welding tools should be used.
Electric Shock can be fatal.
Ensure that ground cable is connected in accordance with
applicable safety codes.
Never touch electrodes, wires, or circuit components with
bare hands. Wear dry welding gloves when welding.
The operator must be insulated from the work piece.
Smoke and gas can be harmful to health.
Ensure that the working area is well ventilated.
Avoid breathing smoke and gas generated during the
welding process. Cutting and welding can cause cancer
because of the smoke that comes from the welds and cuts.
Arc-light emission can be harmful to eyes and skin.
Always wear a welding helmet, anti-radiation glass, and
work clothes while welding.
Ensure that people in or near the working area are
protected.
Welding splash is a fire hazard.
Keep flammable material away from the work place.
Keep a fire extinguisher nearby, and have all personnel
trained in it’s use.
Surface noise generated while welding or cutting can be
harmful to hearing.
In the event of a machine fault.
Refer to this instruction manual.
If the fault cannot be determined, contact your local
dealer or supplier for assistance.