Fluke PM6681 - Page 8

WARNING:
These
servicing instructions
are for
use
by qualified
personnel
only. To
reduce
the risk
of electric
shock,
do not
perform
any
servicing
other
than that
specified in
the
Operating Manual
unless you
are
fully
qualified
to
do so.
Authorized
service and
calibration
of
this
instrument is
avai-
lable worldv^ide.
A
list of
service
centers
is
printed on the
last
page
of this
manual.
Read
this
chapter carefully
before
you check,
adjust or
re-
pair an instrument
When the instrument
is
brought from
a cold to a
warm
environment,
condensation
may
cause haz-
ardous conditions.
Therefore,
ensure
that
the grounding re-
quirements are strictly
met
Power
extension cables must
always have a
protective
ground
conductor.
Indicates that the
operator should
consult
the manual.
WARNING:
Any
interruption
of the
protecti-
ve ground
conductor inside
or outside
the
instrument, or
disconnection
of
the protec-
tive ground
terminal, is
likely to
make
the in-
strument
dangerous.
Do not
Intentionally
disrupt the
protective
grounding.
Caution
and
Warning Statements
You
will
find specific warning
and
caution
statements
whe-
re necessary throughout the
manual.
CAUTION:
Indicates
where incorrect
operating
procedures can
cause damage to,
or de-
struction of, equipment
or
other property.
WARNING: Indicates
a
potential
danger that re-
quires correct
procedures
or
practices
in
order to
prevent
personal injury.
This
Timer/Counter has been
designed and
tested in ac-
cordance
with safety class 1
requirements
for Electronic
Measuring Apparatus of lEC
publication
1010-1, and
CSA
C22.2 No.231, and has
been
supplied in a safe
condition.
This manual
contains information and
warnings that should
be
followed
by the user and the
service
technician to
ensu-
re safe operation and repair in
order to keep the
instru-
ment in a safe
condition.
WARNING:
The opening of
covers
or
removal
of parts,
except those to
which access
can
be
gained by
hand,
is likely to
expose live
parts and
accessible
terminals
which can
cause death.
The instrument
must be
disconnected from
all voltage sour-
ces
before
it
is opened.
Remember
that the
capacitors insi-
de
the
instrument
retain their
charge
even if the
instrument
has been
disconnected
from all voltage
sources.
Grounding
This
instrument
is connected to
ground
via a sealed
three-
core power cable,
which must be
plugged
into socket out-
lets with
protective
ground contacts. No
other
method of
grounding
is
permitted
for
this
instrument.
The ground
symbol
on the rear
panel
indicates
where the
protective ground
lead
is
connected inside the
instrument.
Never
remove
or
loosen this screw.
Disposal of
Hazardous
Materiais
WARNING:
Disposal
of lithium
batteries requi-
res speciai
attention.
Do not
expose the
batteries
to
heat or put
them
under
extensi-
ve pressure.
These
measures
may
cause
the batteries to
explode.
A lithium
battery
is used to power
the
non volatile RAM in
this
instrument.
Our world suffers
from
pollution,
so
don’t
throw batteries into your
wastebasket.
Return
used batte-
ries
to your
supplier or to the
Philips
or Fluke
organization
in
your country.
Line Voltage
The
Timer/Counter
can be powered by
any voltage be-
tween 90
and 265 Vac
without
any
range
switching.
This
makes it suitable for all
nominal line
voltages
between 100
and 240 V.
•
Replacing
Components
in Primary
Circuits
Components that are
important for the
safety of this instru-
ment may only be
replaced by
components
obtained from
your local Philips
or Fluke organization.
After exchange of
the primary
circuits,
perform the safety
inspection and
tests, as described in
Chapter
5,
"Repair".
•
Fuses
This instrument is
protected
by an ordinary
1.6 A slow
blow
fuse mounted inside the
instrument.
NEVER
replace
this fuse
without
first examining
the
Power Supply
Unit.
1-2
Safety
Instructions,