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Model 1331A
Installation
SECTION II
INSTALLATION
2-1. INTRODUCTION.
2-2. This section
contains
instructions for performing
an
initial
inspection
of
Model
1331A. Installation
procedures and precautions are presented
in
step-
by-step order. The procedures for
making
a
claim
for
warranty repairs
and
for repacking the insltument
for
shipment are also
described in this section.
2-3.
INITIAL INSPECTION.
2-4.
The instrument was inspected mechanically and
electrically
before shipment. Upon receipt, inspect
it for damage that may
have
occurred in transit.
Check for broken knobs, bent or broken connectors,
and
dents or
scratches.
If
damage is found, refer to
the claims paragraph in this section. Retain the
packing material for possible future use.
2-5. PREPARATION FOR USE.
2-6.
Model 1331A is shipped from the
factory
ready
for
use
as a
bench instrument with specifications as
listed in Section I. The following paragraphs discuss
other
mechanical
and electrical configurations
of the
instrument.
2-7.
RACK
MOUNTING
.
2-8.
Figure 2-1 shows how one or two instruments
can
be mounted in
a
single rack
adapter.
If
only
one
instrument is to be rack mounted the
extra
mount-
ing opening in the rack
adapter
can be closed with
a
filler panel. Refer to Section I for ordering infor-
mation on the rack
adapter
and filler
panel.
•
1331A·A·
S
Figure
2-1.
Rack Mounting
2-9.
POWER
REQUIREMENTS.
2-10.
Model
1331A operates on either
115
Vac or
230
Vac
±10%, 48 to 440
Hz.
All
instruments
are
shipped ready for
115
Vac operation
unless
speci-
fically ordered for 230 Vac operation. To change
from
one voltage
to the other, set the SELECTOR switch
to
the
voltage
desired
and
install the appropriate
fuse in the fuseholder on the rear panel.
Correct
fuse size is indicated
above
the fuseholder.
2-11.
POWER CONNECTIONS.
2-12. Hewlett-Packard recommends that tlie instru-
ment panel
and cabinet
be grounded.
Model
1331A
is
equipped
with
a
three-conductor power
cable
that,
when
connected
to
an
appropriate receptacle, grounds
the instrument through the offset pin. The power
jack
and
mating plug of the power cord meet International
Electrotechnical
Commission (IEC)
safety standards.
To preserve this protection feature when operating
from
a
two-contact
outlet,
use a three-conductor to
two-conductor
adapter.
Connect the
adapter
wire to
ground at the power
outlet.
2-13. INSTRUMENT COOLING.
2-14. Model 1331A is
adequately
cooled by normal
air circulation.
The instrument requires at least a 2-
inch clearance at sides and top and
5/
8-inch at
bottom when mounted singly (figure 2-2A). When
mounted in this
configuration,
the
maximum
ambient
temperature
must
not
exceed
+55 degC.
2-15.
When
mounted
in pairs, the
minimum
clear-
ances shown in figure 2-2B
must
be
provided.
When
mounted in this
configuration,
the surface
directly
beneath the instrument(s) must not be a
heat
source
and the maximum ambient temperature must not
exceed
+45 degC.
2-16. The clearances indicated in figure 2-2 will
provide
adequate
ventilation if
air
is
allowed to cir-
culate
freely
across
all surfaces
a
nd
the specified
maximum ambient temperatures are not exceeded.
Other mounting
configurations
and environments may
require additional
cooling
measures.
2-17. MONITORED
INPUTS.
2-18
Input
signals
to be displayed
are
connected to
the X-, Y-,
and
Z-axis
amplifiers
through BNC con-
nectors on the rear panel. The impedance of signal
sources must be
20
kilohms or less. The
impedance
2-1
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