Section II Model 345SA
full-module Hewlett-Packard instruments. The till stands
permit the operator to
elevate
the front panel for operating
and viewing convenience.
2-16.
Rack Mounting.
2-17.
The Model 34SSA may be rack mounted by adding
rack mounting kit
Option
908 or Option
909. Option 908
contains the basic hardware and instructions for rack
mounting;
Option 909
adds
front
handles
to the
basic rack
mount kit. The rack mount kits are designed to permit
the Multimeter to be
installed
in a
standard 19
inch
rack.
When rack mounting, additional support must be
provided
at
the rear of the instrument. Be sure that the air intake at
the
rear of
the instrument
is
unobstructed.
2-18.
Interface Connections.
2-19.
The Model 34S5A is compatible
with
the
Hewlett-
Packard Interface Bus(HP-IB).
NOTE
HP-IB is Hewlett-Packard's implementation
of
IEEE std 488-1975, "Standard Digital Interface
for
Programmable Instrumentation
The Multimeter is connected to the
HP-IB
by
connecting an
HP-IB
interface cable to the 24-pin
connector located on
the rear panel.
Figure
2-3
illustrates
typical
HP-IB system
interconnections and shows the 10631A/B/C
HP-IB Inter-
face Cable connectors. Each end of the
cable has both
a
male and female connector
to
simplify interconnection of
instruments and cables. As many as IS instruments can be
connected by the same interface bus:
however, the maxi-
mum length of cable that can be used to connect a group of
instruments
must not exceed 2 meters (6.S
ft.)
times the
number
of instruments to be connected, or 20
meters
(65.6 ft.), whichever
is less.
2-20.
Address Selection. The HP-IB address switch,
located on
the rear panel,
permits
the
user to set the “talk”
and “listen” address
of
the instrument. The talk and listen
address is
a
7-bit code which is selected to
provide
a
unique
address for each bus instrument. The 345SA
normally
leaves the
factory with the address switch set
to a “Listen”
address of 6 and
a
“talk” address of V. The address switch
also
allows selection of a “talk-only” mode.
Refer to
Paragraph
342 for address selection instructions.
2-21.
External
Trigger. A BNC connector,
located on the
rear panel,
is
provided
for an external trigger
input. The
trigger input is to be driven with
TTL
level signals.
2-22.
ENVIRONMENTAL REQUIREMENTS.
WARNING
To
prevent electrical
shock
or
fire
hazard, do
not expose the instrument
to
rain or moisture.
2-23.
Operating and Storage Temperature.
2-24.
In order to meet the specifications listed in Table
1-
l, the instrument should be operated within an ambient
temperature range of 23'"C
t
S^C (73“F
±
9“F). The
instru-
ment may be operated within an ambient
temperature
range of 6°C to
+
55®C
(+ 32°F to
+
131°F) with degraded
accuracy.
2-
25. The instrument may be stored or shipped where the
ambient temperature range is within
—
40^C
to *7S°C
(_40®F to +167'*F).
However,
the
instrument should not
Figure
2-3.
Typical
HP-IB
System Interconnections.
2-2
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