Arc Machines 227 - Manual (Page 12)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION I - INTRODUCTION
1.3
RF AND EMI TRANSMISSIONS
2. RF REGULATION
The FCC regulates the RF emission limitations for welding equipment by the
use of an IEC (international) regulation created by the Special Committee on
Radio Interference (known as CISPR) subcommittee B. The regulation of
record is:
CISPR/B/63
“CODE OF PRACTICE FOR THE USE OF WELDING AND CUTTING
POWER SOURCES UTILIZING RADIO FREQUENCY VOLTAGE FOR
STARTING OR STABILIZING THE ARC.”
The regulation states that due to the variety of work requirements and
conditions it is virtually impossible to establish fixed, normalized and
predictable tests and test setups for RF limits that would actually mean
something. Instead of limits they state the following:
“The manufacturer must design and produce equipment that is functional but
at the same time, design this equipment to keep electromagnetic radiation at
a minimum.”
“The user has the responsibility to install and use the power source per the
instructions of the manufacturer. Through this practice, it is reasonable to
assume that the probability of electromagnetic disturbances will be
significantly reduced. However, if some electromagnetic disturbances are
felt, then it is the responsibility of the USER of the equipment to resolve the
situation.”
3. RF PROTECTION
AMI policy is to comply with the IEC (and thus FCC) regulations. Our
design rules and procedures include testing and observing this area. We can
assure our customers that every effort has been made to reduce RF
emissions to the absolute minimum from our power sources.
However, this does not mean that a user will not have occasional problems
with RF interference with other equipment due to the use of our equipment.
This is the nature of RF starting.
1.6