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1711 Operator's Panel
The
1711 Operator's Panel
(Figure 33)
contains
switches,
keys,
lights, and
indicators
that are pertinent
to
the operating condition
of
the 171
I.
1711
Keys,
Lights, and
Switches
The operating switches,
keys,
and
li
ghts
are
shown in
Figure
34.
There are two
hori
zo
ntal
rows: switches and
keys are in the
bottom
row
a
nd
lights
are
in the top
row.
The
sw
itches
a
nd
lights
which
complement
each
other
are expla
ined
together
as follows:
Power 011
/
Ofj Switch
and
Power 011
Light.
When
the
Power
On/Off
switch is
manually positioned
ON,
DC
power
is
a
pplied
to
the
1711
(ass
umi
ng
1620
power
is
on)
.
The
1711,
in turn,
suppli
es
DC
power to the
1712.
Figure
33.
1711 Operator's
Panel
54
The
Power On light turns
o
n
as
evidence that
DC
power
is applied.
When
the Power
switch
is positioned
OFF,
DC
power
is
removed and
the
li
ght
turns
off.
T
he performance
of the
Analog-to-Digital
Converter
(ADC)
is
reduced
slightly
during the first 15
minutes of
1711
operation.
Powel'
R
eady
Light. This
light
turns on when both
the 1620 and
1711 Power
switches
are on.
Excessive
temperatures in
either
the 1711
or
1620 will
ca
use the Power Ready light to turn off.
Thermal
Light
.
1£ the internal
temperature of the
1711 exceeds
the
range
specified
for reliable operation,
1711
DC
power is lost
and
the Thermal light turns
on.
The
Power Ready light turns
off at
the
same
time.
The
1711 can
be
operated
under this
condition,
but
ADC
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