SECTION
I
GENERAL
INFORMATION
1.1
INTRODUCTION
The
Simpson Instrumentation Products Group Model
880
Series
are
rugged
and
reliable portable instruments. These instruments
are
divided into
two
basic
types.
(A)
Model
880
Voltmeter
(B)
Model
880
Wattmeter
These
two
basic types
are
available
in a
variety
of
ranges
to
meet
the
demand
of a
wide
field
of
applications, such
as in the
shop, laboratory,
or
Quality Control Department.
The
Model
880
Wattmeter
may
also
be
utilized
as an AC to DC
transfer
standard.
Wherever
a
precise measurement must
be
taken,
you
will
find
that
Model
880
Instruments
are
dependable
and
easy
to
operate.
1.2
DESCRIPTION
The
heart
of the
Model
880
Instrument
is the
Simpson Dyna-
mometer
type movement. These instruments
are
capable
of
dependable
AC and DC
measurements.
The
voltmeter versions
of
the
Model
880
have clearly marked binding
posts
showing
the
full
scale voltage value
of
each range. Wattmeter versions
of
the
Model
880
have separate binding
posts
for
voltage
and
current.
These units measure true wattage, (compensated
for
power
factor,
not
simply volt-amperes).
All
Model
880
instruments have
a
large,
easy
to
read 4-1/2"
scale located
in the
upper
half
of the
front
panel.
The
scale
is
hand stepped
and
drawn
to
match each individual movement's
characteristics
to
insure
the
best
possible scale tracking
accuracy.
Parallax
error
has
been virtually eliminated
by use of a
thin
"knife
edge" pointer
and an
image reflecting mirror mounted
below
the
scale
arc.
The
phenolic case
is
designed with heavy
reinforced
walls
and
back
for
maximum durability
and
protection
for the
circuit
components.
1-1
General
Information
1.3
TABLE
OF
SPECIFICATIONS
MODEL
880
VOLTMETER
Parameters:
Movement:
Sensitivity:
*
Accuracy:
Response
Time:
Frequency
Influence:
Dielectric:
Damping
Factor:
Size,
Weight
AC/DC
Volts
Dynamometer
Type
Approx.
55
Ohms
per
Volt
±
1%
of
Full
Scale®
25
°C
2.5
Seconds Maximum
±0.5%
from
54 Hz to 66 Hz
Sine Wave
2600
Volts
60 Hz
Sine Wave
2
Minimum
5
1
/*"
x
3%"
x
7"-Approx.
2V4
lb.
tyjLOGj
TV
CugllU
U/4
-A.
U/Z
A I
f^^J^Ji
\JJ±.
a
/
&
*•_*.
*Applies
when instrument
is in
horizontal position only.
MODEL
880
WATTMETER
Parameters:
Movement:
*
Accuracy:
Response Time:
Frequency Influence:
Dielectric:
Damping Factor:
Size,
Weight
AC/DC
Watts (true
power)
Dynamometer
Type
±1% of
Full Scale
@
25
°C
2.5
Seconds Maximum
±0.5%
from
54 Hz to 66 Hz
Sine
Wave
+1.5%
at 400 Hz
Sine Wave
1500
Volts
60 Hz
Sine Wave
2
Minimum
5%"
x
3%"
x
7"-Approx.
2% lb.
*Applies
when
instrument
is in
horizontal position only.
1.4
VERSIONS
AND
OPTIONS
Model
880
Voltmeters
and
Model
880
Wattmeters
are
avail-
able
in the
following
ranges
and
combinations
of
ranges:
MODEL
880
AC/DC
VOLTMETERS
Range
Catalog
Number
150V
150-300V
75-150-300V
150-300-600V
13130
13140
13150
13160
1-2
To Next Page
Loading...
Need help?
General
