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2
MANUAL CHANGES
Model
339A
Qparatien.
The
ac
voltmeter section
of
the
Model
339A
Option
001
measures
the
true
rms
value
of input
voltages
from
.
1
mV
full
scale
to
300V
full
scale
in
fourteen ranges.
Frequency range
of
the
meter
section
is
1
0Hz
to
80kHz
for
the
.
1
mV
and
.3mV
input
ranges,
and
1
0Hz
to
1
1
0kHz
for
the
.00
1
V
to
300V
input ranges.
Parfarmanca Test
All
the
performance
test
given
in
the
standard
339A
Operating
and
Service
Manual
are
valid for
use on instruments with Option
001
.
The
following
test
is
added
to
allow
verification of Fuil-Scale
Accuracy and Frequency Response
of
instruments with Option
001
installed.
FUNCTION
INPUT LEVEL
FILTERS
OFF
(out)
METER RESPONSE
VU
INPUT
RANGE
ImV
INPUT/GND SELECT
DIS.
AN/
(center
position)
b.
Set-up
the
test
equipment
as
shown
in
Figure 4-
la.
c.
Set
the
AC
Calibrator controls
for
an output
of
.
1
V
@
1
0Hz.
d.
The
333A
.
1
mV
1
0Hz
meter
indication
should be
within the
Test
Limits
listed
in
Table
4-1A.
e.
Using
the
AC
Calibrator,
verify
the
339A
Voltmeter
ac-
curacy
for
each
.ImV
Test
Frequency
in
Table
4- la.
f.
Set the
339A
controls
as
follows:
^^Scala
Accuracy aid Frequency Reapense
Tast
lOptiM
001).
equipment
Required:
INPUT
RANGE
.
3m
v
g.
Set
the
AC
Calibrator controls
for
an output
of
3mV
(5)
10Hz.
ac
calibrator
(-hp-
Model
745A)
100k
onm
resistor
(
ho- Fart
No.
0757-0465)
100 ohm
resistor
(
hp- Part No.
0757-0401)
h.
The
339A
,3mV
1
0Hz
meter
indication
shouid be
within the
Test
Limits
listed
in
Table
4-1 A.
a.
Set
the
339A
controls as follows:
i.
Using
the
AC
Calibrator, verify
the
339A
Voltmeter accuracy
for
each
,3mV
Test
Frequency
in
Table
4- la.
TaWn
4-la. Fall-Scaln
Accuracy and Frequency Response
Tut
Limits
for
Option 001.
Input
Rapga
&
Input
Laval
FREQUENCY
10Hz
30kHz
80kHz
(±4%)
TEST
LIMITS
(±2%)
(
14
%)
<-h
10%,
-30%)
0001V
0003V
000096-
000104
.000098-000102
.000096.0001
94
.0000
70-
0001
1
.000288-000312
.000294-.
000306
.000288-000312
.00021
-.00033
AC
;
A
l
IEHATOH
Figure
4
1a.
Full-Scale
Accuracy
and
Frequency Response
Tast
Equipment
Set up For Option 001.
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