TM-273245 Page 2
S-74 MPa Plus
EXPLODING PARTS can injure.
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Failed parts can explode or cause other parts to
explode when power is applied to inverters.
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Always wear a face shield and long sleeves
when servicing inverters.
SHOCK HAZARD from testing.
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Turn Off welding power source and wire feeder
or stop engine before making or changing me-
ter lead connections.
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Use at least one meter lead that has a self-
retaining spring clip such as an alligator clip.
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Read instructions for test equipment.
FALLING EQUIPMENT can injure.
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Use lifting eye to lift unit only, NOT running
gear, gas cylinders, or any other accessories.
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Use correct procedures and equipment of ade-
quate capacity to lift and support unit.
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If using lift forks to move unit, be sure forks are long enough to
extend beyond opposite side of unit.
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Follow the guidelines in the Applications Manual for the Revised
NIOSH Lifting Equation (Publication No. 94
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110) when manu-
ally lifting heavy parts or equipment.
MOVING PARTS can injure.
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Keep away from moving parts such as fans.
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Keep away from pinch points such as drive
rolls.
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Have only qualified persons remove doors,
panels, covers, or guards for maintenance and
troubleshooting as necessary.
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Keep hands, hair, loose clothing, and tools
away from moving parts.
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Reinstall doors, panels, covers, or guards
when maintenance is finished and before re-
connecting input power.
ELECTRIC AND MAGNETIC FIELDS (EMF)
can affect Implanted Medical Devices.
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Wearers of Pacemakers and other Implanted
Medical Devices should keep away from serv-
icing areas until consulting their doctor and the
device manufacturer.
OVERUSE can cause OVERHEATING.
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Allow cooling period; follow rated duty cycle.
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Reduce current or reduce duty cycle before
starting to weld again.
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Do not block or filter airflow to unit.
H.F. RADIATION can cause interference.
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High-frequency (H.F.) can interfere with radio
navigation, safety services, computers, and
communications equipment.
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Have only qualified persons familiar with electronic equipment
install, test, and service H.F. producing units.
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The user is responsible for having a qualified electrician prompt-
ly correct any interference problem resulting from the installa-
tion.
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If notified by the FCC about interference, stop using the
equipment at once.
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Have the installation regularly checked and maintained.
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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.
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Use Testing Booklet (Part No. 150 853) when
servicing this unit.
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Consult the Owner’s Manual for welding safety
precautions.
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Use only genuine replacement parts from the manufacturer.
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Read and follow all labels and the Technical Manual carefully be-
fore installing, operating, or servicing unit. Read the safety in-
formation at the beginning of the manual and in each section.
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Perform installation, maintenance, and service according to the
Technical Manual, industry standards, and national, state, and
local codes.
1-3. California Proposition 65 Warnings
WARNING: This product can expose you to chemicals in-
cluding lead, which are known to the state of California to
cause cancer and birth defects or other reproductive
harm.
For more information, go to www.P65Warnings.ca.gov.
1-4. EMF Information
Electric current flowing through any conductor causes localized electric
and magnetic fields (EMF). The current from arc welding (and allied pro-
cesses including spot welding, gouging, plasma arc cutting, and
induction heating operations) creates an EMF field around the welding
circuit. EMF fields can interfere with some medical implants, e.g. pace-
makers. Protective measures for persons wearing medical implants
have to be taken. For example, restrict access for passers
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by or con-
duct individual risk assessment for welders. All welders should use the
following procedures in order to minimize exposure to EMF fields from
the welding circuit:
1. Keep cables close together by twisting or taping them, or using a
cable cover.
2. Do not place your body between welding cables. Arrange cables
to one side and away from the operator.
3. Do not coil or drape cables around your body.
4. Keep head and trunk as far away from the equipment in the
welding circuit as possible.
5. Connect work clamp to workpiece as close to the weld as
possible.
6. Do not work next to, sit or lean on the welding power source.
7. Do not weld whilst carrying the welding power source or wire
feeder.
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 operations.
If cleared by your doctor, then following the above procedures is recom-
mended.
