HP 9120A Operating Manual
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A
CAUTION
THE
91OOA CALCULATOR WILL
,A\
oPERATE FROM A
400
HERTZ
.
POWER SOURCE,
THE
9120A
PRINTER
WILL
NOT. DAMAGE
COULD
RESULT TO THE PRINTER
IF 4OO HERTZ POWER IS APPLIED.
A member of the
growing
9100
system's instrument fam-
ily,
the 9I20A
printer gives
the
9100 series calculator
printing
power.
The
91204 will
print,
singularly or
in any
combination, the contents of the calculator's
X
keyboard,
Y accumulate, and Z
temporary
registers.
The
printer
will
also
print
the
contents
of the
calculator's memory.
The Model
91204
requires either
115
or
230 volts AC
-+lOo/o,
50 to 60
Hertz and approxímately
45
watts of
power.
With
the
printer
disconnected from the
AC
power
source,
slide
the
line voltage switch on the rear
panel
until
the
line is under the
voltage
to be
used.
GENERAL
INFORMATION
GENERAL
DESCRIPTION
POWER
REQUIREMENTS
RAD|O FREQUET{CY
INTERFERENCE
GROUNDING
REQUIREMENTS
3
CAUTION
DO NOT APPLY OPERATING POWER
TO THE
9120A PRINTER UNLESS
THE
LINE VOLTAGE SWITCH ON
THE
REAR PANEL IS IN THE PROPER
POSITION.
Radio
Frequency
lnterference
(RFl)
is
generated
by many
electrical
devices, included in this
group
is the 9120A. A
paper
length of
less
than one
foot
will minimize
the
amount of RFI
generated
by the
printer;
as
the
paper
is
conductive it acts as an antenna.
To
protect
operating
personnel,
the National Electrical
Manufacturer's Association
(NEMA)
recommends that
the
printer
keyboard
and
cabinet
be
grounded.
The
printer
is
equipped
with a three-conductor
power
cable which, when
plugged
into an
appropriate receptacle,
grounds
the
cabinet of the
printer.
The center
pin
on the
power
cable
three-pronged
connector is
the
ground
connection.
,t\