Tweco 211i Thermal Arc Fabricator - Manual (Page 86)

FABRICATOR 211i PROBLEMS/SERVICE
PROBLEMS AND ROUTINE SERVICE 5-4 Manual 0-5157
Power Source Calibration
A. Schedule
Output testing of all Thermal Arc Inverter 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 -
1. For transportable equipment, at least once every 3 months; and
2. For fixed equipment, at least once every 12 months.
B. Calibration Requirements
Where applicable, the tests outlined in Table 5-3 below shall be conducted by an accredited Thermal Arc
service agent.
Testing Requirements
Output current (A) to be checked to ensure it falls within applicable Thermal Arc power source specifications
Output Voltage (V) to be checked to ensure it falls within applicable Thermal Arc power source specifications
Motor Speed (RPM) of wire drive motors to be checked to ensure it falls within required Thermal Arc power
source / wire feeder specifications
Accuracy of digital meters to be checked to ensure it falls within applicable Thermal Arc power source
specifications
Table 5-3: Calibration Parameters
Periodic calibration of other parameters such as timing functions are not required unless a specific fault has
been identified.
C. Calibration Equipment
All equipment used for Power Source calibration shall be in proper working condition and be suitable for
conducting the measurement in question. Only test equipment with valid calibration certificates (NATA certi-
fied laboratories) shall be utilized.