Tweco 350 4R Wirefeeder - Manual (Page 46)

7-2 Manual 0-5182
weldskill 250, 350 service
Service
Note that due to the dangers of stray output currents damaging fixed wiring, the integrity of fixed wiring sup-
plying Cigweld welding power sources should be inspected by a licensed electrical worker in accordance with
the requirements below -
a) For outlets/wiring and associated accessories supplying transportable equipment - at least once every
3 months; and
b) For outlets/wiring and associated accessories supplying fixed equipment - at least once every 12
months.
General Maintenance Checks
Welding equipment should be regularly checked by an accredited Cigweld Service Provider to ensure that:
• Flexible cord is of the multi-core tough rubber or plastic sheathed type of adequate rating, correctly
connected and in good condition.
• Welding terminals are in suitable condition and are shrouded to prevent inadvertent contact or short
circuit.
• The Welding System is clean internally, especially from metal filing, slag, and loose material.
Accessories
Accessory equipment, including output leads, electrode holders, torches, wire feeders and the like shall be
inspected at least monthly by a competent person to ensure that the equipment is in a safe and serviceable
condition. All unsafe accessories shall not be used.
Repairs
• If any parts are damaged for any reason, it is recommended that replacement be performed by an ac-
credited Cigweld Service Provider.
2. Power Source Calibration
Schedule
Output testing of all Cigweld Power Sources and applicable accessories shall be conducted at regular intervals
to ensure they fall within specified levels. Calibration intervals shall be as outlined below -
a) For transportable equipment, at least once every 3 months; and
b) For fixed equipment, at least once every 12 months.
If equipment is to be used in a hazardous location or environments with a high risk of electrocution as outlined
in AS 1674.2 - 2007, then the above tests should be carried out prior to entering this location.
Calibration Requirements
Where applicable, the tests outlined in Table 7-2 below shall be conducted by an accredited CIGWELD service
agent.
Testing Requirements
Output current (A) to be checked to ensure it falls within applicable Cigweld power source specifications
Output Voltage (V) to be checked to ensure it falls within applicable Cigweld power source specifications
Motor Speed (RPM) of wire drive motors to be checked to ensure it falls within required Cigweld power
source / wire feeder specifications
Table 7-2: Calibration Parameters
Periodic calibration of other parameters such as wave balance (AC), timing functions and high frequency start
is not required unless a specific fault has been identified.
Calibration Equipment
All equipment used for Power Source calibration shall be in proper working condition and be suitable for con-
ducting the measurement in question. Only test equipment with valid calibration certificates (NATA certified
laboratories) shall be utilized.