Emf Information - Thermal Arc 201 TS Service Manual

THERMAL ARC 161STL, 201TS
• Have only qualified persons remove doors, panels, covers, or
guards for maintenance as necessary.
• Keep hands, hair, loose clothing, and tools away from moving
parts.
• Reinstall doors, panels, covers, or guards when maintenance
is finished and before reconnecting input power.
MAGNETIC FIELDS can affect Implanted Medical De-
vices.
• Wearers of Pacemakers and other Implanted Medical Devices
should keep away from servicing areas until consulting their
doctor and the device manufacturer.
OVERUSE can cause OVERHEATING.
• Allow cooling period; follow rated duty cycle.
• Reduce current or reduce duty cycle before starting to weld
again.
• Do not block or filter airflow to unit.
H.F. RADIATION can cause interference.
• High-frequency (H.F.) can interfere with radio navigation, safety
services, computers, and communications equipment.
• Have only qualified persons familiar with electronic equipment
install, test, and service H.F. producing units.
• The user is responsible for having a qualified electrician
promptly correct any interference problem resulting from the
installation.
• If notified by the FCC about interference, stop using the equip-
ment at once.
• Have the installation regularly checked and maintained.
• Keep high-frequency source doors and panels tightly shut, keep
spark gaps at correct setting, and use grounding and shielding
to minimize the possibility of interference.
!
READ INSTRUCTIONS.
• Use Testing Booklet (Part No. 150 853) when servicing this unit.
• Consult the Owner's Manual for welding safety precautions.
• Use only genuine replacement parts from the manufacturer.
Safety Instructions and Warnings
WARNING
WARNING
WARNING
WARNING
SAFETY INSTRUCTIONS AND WARNINGS

1.06 EMF Information

Considerations About Welding And The Effects Of Low Frequency
Electric And Magnetic Fields
Welding current, as it flows through welding cables, will cause elec-
tromagnetic fields. There has been and still is some concern about
such fields. However, after examining more than 500 studies span-
ning 17 years of research, a special blue ribbon committee of the
National Research Council concluded that: "The body of evidence,
in the committee's judgment, has not demonstrated that exposure to
power-frequency electric and magnetic fields is a human-health haz-
ard." However, studies are still going forth and evidence continues to
be examined. Until the final conclusions of the research are reached,
you may wish to minimize your exposure to electromagnetic fields
when welding or cutting.
To reduce magnetic fields in the workplace, use the following pro-
cedures:
1. Keep cables close together by twisting or taping them, or using a
cable cover.
2. Arrange cables to one side and away from the operator.
3. Do not coil or drape cables around your body.
4. Keep welding power source and cables as far away from operator
as practical.
5. Connect work clamp to workpiece as close to the weld as pos-
sible.
About Implanted Medical Devices:
Implanted Medical Device wearers should consult their doctor and
the device manufacturer before performing or going near arc welding,
spot welding, gouging, plasma arc cutting, or induction heating opera-
tions. If cleared by your doctor, then following the above procedures
is recommended.
1-8 Manual 0-5148