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Model
l l 180A Section I
SECTION
GENERAL
INFORMATION
1-1.
INTRODUCTION.
1-2.
The Hewlett-Packard
Model
3480A/B Multifunction
Digital Voltmeter may be equipped with Option 005 Data
Storage.
Up
to 50 complete
DVM
readings may be entered
into Data Storage at up to 1000 readings per second. The
output
of
these stored readings may be governed by an
external device. Data Storage
is
ideal for use with a digital
recorder where readings may be taken at high speed, stored,
then outputted at 10 to
20
lines per second.
1-3. Each stored reading includes
all
information generated
by the 3480A/B including input voltage magnitude, range,
function, polarity, and overload. The number
of
readings
stored
is
selectable up to 50.
When
stored readings are
outputted, two additional digits are added
to
identify the
reading number.
All
output lines are isolated from the
3480A/B input terminals.
1-4. Option 005 Data Storage includes Isolated
BCD.
When
Data Storage
is
disabled, the output
of
the 3480A/B
becomes identical to that
of
Isolated
BCD.
1-5. The 3480A/B offers a wide variety
of
plug-in units
which may be used with Data Storage. These plug-ins
include the 3481 A with a single 10 V
de
range, the 3482A
with 5
de
ranges, the 3484A with 5
de
ranges, 5 true rms
ac
ranges and 6
S1
ranges and the 3485A with up
to
50 input
channels plus 3
de
ranges.
1-6.
Any
of
the above capabilities including Data Storage
may
be
purchased in a self-contained data logger, the
2070A, which includes the 3480A Multifunction
DVM,
the
5055A Digital Recorder plus any 3480 plug-in. A special
rear panel includes the major Data Storage control lines in
the form
of
easy
to
use switches.
1-7.
Accessories
Furnished
(with
Data
Storage
only).
6 foot
"Y"
cable with Remote Control lines and
BCD
lines
split and left unterminated. Other end has 100 pin connec-
tor for Data Storage.
1-8.
Accessories
Available
(with
Data
Storage
only).
-hp-
11181 A: Data Storage Cable for use with 5050B or
5055A Digital Recorders. This
is
a
"Y"
cable with Remote
Control lines split and left unterminated and the
BCD
lines
terminated with a
50
pin connector for use with a digital
recorder. Other end has 100 pin connector for Data
Storage.
3480A
DIGITAL
VOLTMETER
3481A
BUFFER
AMPLIFIER
+I 4
(,
r 4
DATA
STORAGE
may
be
used
with
any
combination
of
these mainframes
and
plug-ins.
1
~1-
,
·
7 1'
(e:
3482A
DC
RANGE
UNIT
.....
-
..
-
34808
DIGITAL
VOLTMETER
l("
I "
Ir'
' . I
3484A
MULTI-FUNCTION
UNIT
2070A
DATA
LOGGER
3485A
SCANNING
UNIT
Figure 1-1. Data Storage.
1-1
