Table of Contents
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1-1.
INTRODUCTION
1-2.
This
eight-section
manual
provides
comprehensive
information
for
installing,
operating
and
maintaining
your Fluke
digital
multimeter.
Complete
descriptions
and
instructions
are included
for the
instrument
mainframe,
for
all
modules
necessary
in
making
dc
volts
measurements, and
for
any
optional
modules
ordered
with
the instrument.
Appropriate
sectionalized
information
is
also
included
with
any
optional
modules
subsequently ordered
and
may
be
inserted
in
Section
6.
1-3.
DESCRIPTION
1
-4.
The
multimeter
features
6-1/2
digit
resolution,
full
annunciation
and
simplicity
of operation.
Modular
construction,
microprocessor
control,
and
a
bus
structure
provide
excellent
flexibility.
Memory
programming from
the front panel (or
through
a
remote
interface)
controls
all
measurement
parameters,
mathematic
operations
and
special
operations.
An
averaging
mode
is
available
to
automatically optimize
display resolution
and
stability
for
each
function
and
range.
The
standard
hardware
configuration allows
for
measurement
of
dc
volts
in five
ranges with 100
nV
resolution
on
the
lowest
range.
Optional
modules
are available for
ac
volts
(four
ranges),
ac
or
dc
current
(five
ranges),
and
resistance (eight
ranges)
in
two-wire
or four-wire
arrangements.
1-5.
Modular
Construction
1-6.
Considerable
versatility
is
realized
through unique
contruction. All
active
components
are
contained
in
modules which
plug
into a
mainframe motherboard.
This
module-motherboard
mating,
combined
with bus
architecture
and
microprocessor
control, yields
both
ease
of option
selection
and
reduced
downtime.
NOTE
The
A3
Isolator
PCS
is
standard
in
the
8505
A.
This
assembly
is
documented
in
Section
6 of
this
manual
as
Option
-08
A.
1-7.
Microprocessor
Control
1-8.
All
modules
function
under
direct
control of a
microprocessor based
controller.
Each module
is
addressed
by
the controller as
virtual
memory.
External
reference values
and
offsets
can be
applied
separately,
stored
in
memory, and
automatically used
as factors
in
all
subsequent
readings. Digital
filtering utilizes
averaged
samples
for
each
reading.
1-9.
Software
Calibration
1-10.
The 8505A
features
microprocessor-controlled
calibration
of
all
ranges
and
functions.
Any
range
can be
calibrated
using a reference input of
any
known
value
from
60%
of range
to
full scale.
Software
calibration
can
be
performed
using front-panel or
remote
control,
allowing
recertification
without opening
the
case or
removing
the
multimeter
from
the system.
1-11.
R@elreu
fating
Remainder
A/D
Conversion
1-12.
The
multimeter adapts
Fluke's
patented
recirculating
remainder (R
2
)
A/D
conversion technique
to
microprocessor
control.
This combination provides
fast,
accurate, linear
measurements and
long-term
stability.
1-13.
Options
and
Accessories
1-14.
Remote
interfaces,
ac converters, a current
converter,
and an
ohms
converter
are
among
the
numerous
options
and
accessories available for use
with
the
multimeter.
Refer
to
Tables
1-1
and
1-2
for
complete
listings.
AC
conversion can
be
accomplished
with
either
the
AC
Averaging
module
(Option
01)
or the
RMS
module
(Option 09A).
Any
one
of the three
Remote
Interface
modules (Option
05, 06,
or 07)
can be
installed
at
one
time.
1-15.
SPECIFICATIONS
1-16.
Mainframe
specifications
with dc
volts
and dc
ratio
measurement
capability are
presented
in
Table
1-3.
Optional function
specifications are
supplied with the
respective
option
modules and
included
in
Section
6.
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