4-1.
INTRODUCTION
4-2.
This section of the raanxial contains the informa-
tion necessary for you to maintain your Model 893 AC-
DC Different^ Voltmeter. The
information is arranged
under
headings of "SERVICE
INFORMATION,
DISAS-
SEMBLY
INSTRUCTIONS,
GENERAL MAINTENANCE,
PRECALIBRATION AND
TROUBLESHOOTING,
and
CALIBRATION PROCEDURES.
"
A list
of
the test equip-
ment required for maintenance of this instrument is
contained in
Figure
4-1.
E the recommended
test
equip-
ment is not available,
other
instruments having
the
equivalent specifications may be
substituted.
4-3. Your instrument was completely tested and
aligned before
leaving the factory
and
calibration should
not
be
necessary durii^ the first 90 days of
operation.
However, should
you wish to check the instrument ac-
curacy
against most
of
the specifications contained in
Section I, the information contained in the Calibration
Procedures
may
be used. The Calibration Procedures
are arranged
in
such
a
manner
that
by disregarding
the
adjustment
information that
may
be used
as
Instrument
Performance
Checks.
4-4.
We recommend that you
thoroughly
read and
understand this section
of
the manual before attempting
any
maintenance
on
your instrument.
4-5.
SERVICE INFORMATION
4-6, Each instrument manufactured by
the
John Fluke
Mfg. Co.
,
Inc. is
warranted for
a
period of one year
upon
delivery to the original purchaser.
Complete
war-
ranty information is contained in
the Warranty
page
located at the rear of this manual.
4-7. Factory authorized calibration
and
repair
service
for all
Fluke instruments
are available
at
various world
wide locations. A
complete list
of
factory
authorized
service
centers
is
located at the
rear of this manual.
If requested, an
estimate
will be
provided to the
cus-
tomer before any repair work is begun on instruments
beyond
the warranty period.
4-1
SCi‘3 A
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