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DATA PRECISION 938 User Manual

DATA PRECISION 938
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42-5124
MODEL
938
mtispiece.
Model
938
Digital
Capacitan
ce
Meter
MODEL
938
INTRODUCTION
Chapter
1
INTRODUCTION
1.1
GENERAL
DESCRIPTION
Data
Precision
Model
938
Digital
Capacitance
Meter
(Frontis
piece)
is
a
hand-held,
portable,
field
and
laboratory,
3
1
/z-digit
capacitance
meter.
It
employs
a
unique
circuit
(patent
pending)
that
provides
accuracy,
stability,
and
noise
immunity
not
previously
obtainable
in
low-cost
capacitance
meters.
The
meter's
eight
(8)
range
scales,
providing
the
user
with
nominal
full
scale
values
from
200
pF
to
2000
gF
(in
decade
steps),
with
corresponding
resolutions
from
0.1pF
to
1
gF,
make
this
instrument
a
useful
tool
in
a
wide
range
of
applications.
Reduced
component
count,
the
use
of
low-powered
CMOS
IC
’
s,
and
the
use
of
a
liquid
crystal
display
all
contribute
to
reliable
performance
over
an
extended
battery
life
(100
to
200
hours
with
normal
usage).
Optionally,
an
accessory
Battery
Eliminator
(Data
Precision
Model
BE9)
may
be
used
to
power
the
instrument
from
local
ac
sources.
The
BE9
is
available
for
each
of
the
standard
supplies
(100VAC,
117VAC,
200VAC,
or
240VAC).
The
Model
938
is
assembled
in
the
new
Data
Precision
standard
hand-held
mini
case
configuration,
molded
of
high-impact
Noryl*
plastic,
and
resistant
to
shock
and
vibration
in
even
the
most
stringent
of
field
environmental
applications.
The
Model
938
is
supplied
with
battery
and
spare
fuse,
and
is
ready
to
use
as
soon
as
the
battery
iS
installed
in
the
case
(see
Chapter
3).
The
front
panel
includes
standard
banana-jack
recep
tacles,
as
well
as
recessed
spring-clip
connectors
with
select
able
spacing
for
capacitor
leads
of
varying
separations.
A
stan
dard
banana-plug
to
alligator
clips
test
lead
set
(T9)
is
included
in
the
standard
configuration.
‘
Registered
trademark.
1-1

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DATA PRECISION 938 Specifications

General IconGeneral
BrandDATA PRECISION
Model938
CategoryMeasuring Instruments
LanguageEnglish