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Simpson 2 Series - Page 12

Simpson 2 Series
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General
Description
Ohms
Rx
41.5“
of
dial
arte
Жз
eee
R
x
100,
Rx
10,000
+1.0°
of
dial
arc
21.25
of
dial
arc
AC
Volts
(Dial
calibrated
for
RMS
value
of
a
pure
sine
wave)
2.5V
thru
1000V
+2%
of
FS
+3%
of
FS
5000V
+3%
of
FS
+4%
of
FS
*These
accuracies
are
guaranteed
when
the
Model
270
Series
2
is
used
with
the
meter
dial
in
a
horizontal
plane.
In
summary,
the
change
in
accuracy
with
a
10°
Fahrenheit
temperature
change
from
77°F.
is
+4%
on
DC
and
+1%
on
AC.
These
accuracy
changes
are
linear
over
this
tempera-
ture
range,
being
+0.05%
per
°F.
on
DC
and
+0.1%
per
°F.
on
AC.
In
order
to
apply
the
temperature
correction
factors
indi-
cated
above,
the
temperature
of
the
electrical
elements
of
the
Model
270
Series
2
must
be
known.
It
can
be
assumed
that
this
temperature
is
that
of
the
area
in
which
the
Model
270
Series
2
is
being
used
if
it
has
been
in
this
area
(or
another
area
of
very
nearly
equal
temperature)
for
a
period
of
at
least
four
hours.
This
time
lapse
can
be
materially
re-
duced
by
the
removal
of
the
Model
270
Series
2
from
its
case
and
providing
rapid
air
flow
around
the
electrical
elements.
The
Model
270
Series
2
has
a
100
degree
dial
with
the
D.C.
scale
divided
into
equal
intervals
of
2
degrees
each.
The
accuracies
stated
as
''*
x
%
of
full
scale
value’’
can
be
directly
visualized'as
N
divisions
of
DC
scale.“
For
ex-
10

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