____________________________________________________________________
Page 5-78
Cirrus Perspective™ Line Maintenance Manual
Rev. E
190-00920-00
NOTE
If
any
of
the
three
measurements
(Altitude,
Vertical
Speed,
Power
On
Time)
are
outside
of
their
respective
displayed
limits,
the
displayed
measurement
will
appear
in
red,
and
the
‘OK’
button
will
be
unavailable
(grayed
‐
out).
If
successful
calibration
is
not
achievable,
clicking
‘Cancel’
will
halt
the
program
and
produce
the
following
popup
message:
Figure
5
‐
14.
Calibration
Failed
Screen
14.
After
the
0
feet
calibration
is
complete,
the
‘Set
altitude
to
11,000
ft’
screen
appears.
15.
According
to
the
on
‐
screen
instructions,
set
the
pressure
control
system
to
a
pressure
altitude
of
11,000
feet.
16.
Allow
the
on
‐
screen
altitude
reading
to
stabilize,
then
click
‘OK’.
17.
After
the
11,000
feet
calibration
is
complete,
the
‘Set
altitude
to
30,000
ft’
screen
appears.
18.
According
to
the
on
‐
screen
instructions,
set
the
pressure
control
system
to
a
pressure
altitude
of
30,000
feet.
19.
Allow
the
on
‐
screen
altitude
reading
to
stabilize,
then
click
‘OK’.
20.
After
the
30,000
feet
calibration
is
complete,
the
‘Set
altitude
to
41,000
ft’
screen
appears.
21.
According
to
the
on
‐
screen
instructions,
set
the
pressure
control
system
to
a
pressure
altitude
of
41,000
feet.
22.
Allow
the
on
‐
screen
altitude
reading
to
stabilize,
then
click
‘OK’.
23.
After
the
altitude
calibrations
are
complete,
the
‘Program
Calibration
to
Unit?’
screen
(Figure
5
‐
15)
appears.
Click
‘OK’
to
program
the
new
calibration
to
the
GDC
74(X)
unit.
NOTE
Before
the
new
calibration
is
written
to
the
unit,
the
program
stores
the
current
calibration
to
a
file
named
CAL_(serial_num)_YYYYMMDD_
HHMMSS.txt
that
can
be
used
to
restore
the
original
calibration
back
to
the
unit
if
needed
(refer
to
the
“To
Restore
Original
Calibration”
section).
Summary of Contents for Cirrus Perspective SR20
Page 2: ......
