Periodic
Safety
Check
"'Important
When
testing
RF
equipment,
follow
these
test
procedures
to
liuplicate
manufacturer
test
(iata.
Keep
test
leads
to
the
minimum
length
usable;
lead
inductance
and
stray
capacitance
can
adversely
affect
readings.
Carefully
select
suitable
ground
paints
to
avoid
ground
loop
error
in
measurements.
The
accuracy
of
most
RF
instruments
IS
approximately
1-5%
of full
scale.
Using
uncompensated
scope
probes
causes
large
errors
when
measuring
high
voltage
RF
waveforms.
Periodic
Safety
Check
Perform
the
folloV\ing
safety
check
every
six
months
to
verify
that
the
generator
is
functioning
properly.
Record
the
test
results
for
reference
in
future
tests.
If
the
generator
fails
to
meet
any
of
the
checks,
refer
to
Section 6, Troubleshooting.
Warning
Electric Shock
Hazard-When
taking measurements
or
troubleshooting the
generator, take appropriate precautions, such as using isolated
tools and
equipment, using the
"one hand rule," etc.
Electric
Shock
Hazard-Do
not touch any exposed wiring or conductive surfaces
while the generator is disassembled and energized. Never wear a grounding
strap when working on an energized generator.
The generator contains electrostatic-sensitive components. When repairing the
generator, work at a static-control workstation. Wear a grounding strap when
handling electrostatic-sensitive components, except when working on an
energized generator. Handle circuit boards by their nonconductive edges. Use an
antistatic container for transport of electrostatic-sensitive components and circuit
boards.
111e
sumllk,ry
of
safety
checks:
•
Inspect
the
generator
and
accessories
•
Inspect
the
internal
components
• Test
the
generator
• Verify REM
function
•
Confirm
outputs
•
Check
leakage
current
and
ground
resistance.
Recommended
Test
Equipment
• Digital
voltmeter-Fluke
77
or
87,
or
equivalent
• True RMS
voltmeter-Fluke
8920,
or
equivalent
•
Oscilloscope-Tektronix
2445,
or
equivalent
•
Leakage
current
tester-Use
UL
load
device
or
commercially
available
leakage
tester
•
Leakage
table-per
lEC 601-2-2,
Figure
104
•
100,200,300,500
ohm,
a11250
watt,
1
(~'()
tolerance,
noninductive
(Dale
NH-250
or
equivalent).
Force
FXTM-C
Service
Manual
5-13
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