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Section
I1
Paragraphs 2-9 to 2-13
Model 431B
/-
STEP
@
rUSH IN TO LIMIT
STEP
a
STEP
@
SLIDE
BOTTOM
PART
TO
LIMIT
Y
STEP
@
SET
RETAINER
BACK
INTO
PLACE
SLIDE
OVER
TO
LIMIT
STEP
@
PUSH
UP
TO
LOCK
STEP
@
PLACE INSTRUMENT
INTO CASE
Figure 2-2. Steps to Place Instrument into Combining Case
FILLER PANEL
Figure 2-3. Adapter Frame Instrument Combinations
2-
2
f. Insert screws (5) on both sides of frame, and
tighten until submodular instruments a r e secure in
frame.
g. The complete assembly
is
ready for rack
mounting.
2-9. T H R E E - C O N D U C T O R P O W E R CABLE.
2-10. To protect operating personnel, the National
Electrical Manufacturers' Association (NEMA) rec-
ommends that the instrument panel and cabinet be
grounded.
All Hewlett-Packard
instruments a r e
equipped with
a three-conductor power cable which,
when plugged into an appropriate receptacle, grounds
the instrument.
The offset pin on the power cable
three-prong connector i s the ground wire.
2-11. To preserve the protection feature when oper-
ating the instrument from
a two-contact outlet, use a
three-prong
to
two-prong adapter and connect
the
green pigtail on the adapter to ground.
2-12. P R I M A R Y P O W E R R E Q U I R E M E N T S .
2-13. The Model 431B can
be
operated from an ac o r
dc primary power source. The a c source can be either
115 or 230 volts, 50 to 1000 cps. The dc source is a
24-volt rechargeable battery.
The rechargeable
battery is supplied with option 01 instruments only.
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