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OVERUSE
can
cause
OVERHEATED
EQUIPMENT.
1.
Allow
cooling period.
2.
Reduce
current
or
reduce
duty cycle
before
starting
to weld
again.
Follow rated
duty cycle.
STATIC ELECTRICITY
can
damage
parts
on
circuit boards.
Put
on
boards
grounded
wrist
strap
BEFORE
handlinf
or
parts.
Use proper
static-proof bags
and boxes
to
store,
move,
or
ship
PC boards.
SIGNIFICANT DC VOLTAGE exists after
removal of
input
power
on
inverters.
1.
Turn Off
inverter,
disconnect
input
power, and
discharge
input
capacitors
according
to
instructions
in
Maintenance
Section
before
touchinq
any
parts.
BUILDUP OF SHIELDING GAS
can
harm
health
or
kill.
1-4.
Principal Safety
Standards
1-5.
EMF Information
II
~
1.
Shut off
shielding
gas
supply
when not in
use.
Safety
in
Welding
and
Cutting,
ANSI
Standard
Z49.1,
from
American
Welding Society,
550 N.W. LeJeune
Rd,
Miami FL 33126
Safety
and
Health
Standards,
OSHA
29
CFR
1910,
from
Superintendent
of
Documents,
U.S. Government
Printing
Office,
Washington,
D.C. 20402.
Recommended Safe Practices for the
Preparation
for
Welding
and
Cutting
of Containers That Have Held Hazardous
Substances,
American
Welding Society
Standard AWS
F4.i,
from American
Welding Society,
550 N.W. LeJeune
Rd, Miami,
FL 33126
National Electrical
Code,
NFPA Standard
70,
from National Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA 02269.
Safe
Handling
of
Compressed
Gases in
Cylinders,
CGA
Pamphlet
P-i,
from
Compressed
Gas
Association,
1235 Jefferson Davis
Highway,
Suite
501,
Arlington,
VA 22202.
Code for
Safety
in
Welding
and
Cutting,
CSA Standard
Wi
17.2,
from Canadian Standards
Association,
Standards
Sales,
178
Rexdale
Boulevard, Rexdale, Ontario,
Canada M9W
1
R3.
Safe Practices For
Occupation
And Educational
Eye
And Face
Protection,
ANSI
Standard
Z87.i,
from
American
National
Standards
Institute,
1430
Broadway,
New
York,
NY 10018.
Cutting
And
Welding
Processes,
NFPA Standard
51
B,
from
National Fire Protection
Association,
Batterymarch
Park,
Quincy,
MA 02269.
Considerations About
Welding
And The Effects Of Low
Frequency
Electric And
Magnetic
Fields
The
following
is
a
quotation
from the General Conclusions
Section
of the U.S.
Congress,
Office of
Technology
Assessment,
Biological
Effects
of Power
Frequency
Electric
&
Magnetic
Fields
Background
Paper,
OTA-BP-E-53
(Washington,
DC:
U.S.
Government
Printing
Office,
May 1989):
.
.
.
there is
now
a
very
large
volume of scientific
findings
based
on
experiments
at the
cellular level and from studies with animals and
people
which
clearly
establish that low
frequency magnetic
fields
can
interact
with,
and
produce changes
in,
biological
systems.
While
most
of this work is of
very
high quality,
the results
are
complex.
Current scientific
understanding
does
not
yet
allow
us
to
interpret
the evidence in
a
single
coherent framework. Even
more
frustrating,
it does not
yet
allow
us
to
draw definite conclusions about
questions
of
possible
risk
or
to offer clear
science-based advice
on
strategies
to
minimize
or
avoid
potential
risks.
To reduce
magnetic
fields in the
workplace,
use
the
following
procedures:
1.
Keep
cables close
together by twisting
or
taping
them.
2.
Arrange
cables
to
one
side and away from the
operator.
3.
Do
not coil
or
drape
cables around the
body.
4.
Keep welding
power
source
and cables
as
far away
as
practical.
5.
Connect work
clamp
to
workpiece
as
close
to
the weld
as
possible.
About Pacemakers:
The above
procedures
are
also recommended for
pacemaker
wearers.
Consult your doctor for
complete
information.
OM-167 302
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3
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