SanRex SANARG 200AP, Operator'S Manual

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WARNING:
Explosives:
The high frequency section of this machine has an output similar to a radio
transmitter. The machine should NOT be used in the vicinity of blasting
operations due to the danger of premature firing.
WARNING:
Computers:
It is also possible that operation close to computer installations may cause
computer malfunction.
3.3.3 HIGH FREQUENCY INTERFERENCE
Interference may be transmitted by a high frequency initiated or stabilized arc welding
machine in the following ways:
Direct Radiation
Radiation from the machine can occur if the unit is not properly grounded. The shielding of
the high frequency unit in the Power Source will prevent direct radiation if the equipment is
properly grounded.
Remedy: Keep the input power lines as short as possible. Enclose excessive lengths in rigid
metal conduit or equivalent shielding. The metal conduit should have a good common
ground to the welder ground.
Transmission via the Supply Lead
Without adequate shielding and filtering, high frequency energy may be fed back into the
wiring within the installation (mains) by direct coupling. The energy is then transmitted by
both radiation and conduction.
Remedy: Keep the work and torch leads as short as possible and as close together as
possible.
Radiation from Welding Leads
Radiated interference from welding leads, although pronounced in the vicinity of the leads,
diminishes rapidly with distance.
Remedy: Keeping leads as short as possible will minimize this type of interference. Looping
and suspending of leads should be avoided where possible when welding to avoid producing
additional interference.