Chapter 7. Reference
80 | ADTS 405 R/F Mk2 Instruction Manual-English
© 2017 General Electric Company – All Rights Reserved.
c.
To de-select auto run press [NONE].
7.2.19 HELP
The
HELP
key provides help on each key. The help message generally gives associated
functions and ways of changing the use of each key. To get help on any of the keys on the
keypad:
a.
Press
HELP
, then press the required key for information. Some help screens show a
flashing [MORE] over the F4 key, press
F4
for further information.
b.
Press
CLEAR/QUIT
to exit the help system.
7.2.20
or
(Nudge Keys)
Change the current aim up or down by a small increment. This facility can be used to align a
pointer of an instrument to a precise indicated value and compare this indicated value with
the measured value. This facility may be used for pressure switch testing as follows:
a.
Aim for a pressure just below the expected operating point.
b.
When the pressure is achieved, repeatedly press
until the switch operates.
c.
Record the pressure reading shown on the display.
d.
Repeat this procedure using the
until the switch returns to its original condition,
refer to Section 4.8, “Airspeed Switch Test,” on page 36 for an example. Holding the
nudge function automatically repeats the function.
e.
Record the pressure reading shown on the display.
Note:
(1) Holding down one of the
keys automatically repeats the function.
Note:
(2) The nudge value can be used for large increments e.g., 100 kts or 5,000 ft to
“step through” cardinal points on a test.
7.2.21 Number 0 to 9
Use these keys for numeric entry. All data entry is based on over-writing the existing value,
when the first numeric key is pressed, the existing number is replaced by the key pressed.
a.
Press
ENTER
to complete numeric entry. Press
CLEAR/QUIT
if a mistake is made
during numeric entry. At any time, the existing number may be recovered by pressing
CLEAR/QUIT
.
7.2.22 -000
This key performs two functions during numeric entry.
1.
If it is the first numeric key pressed, it produces a minus sign for the entry of negative
numbers.
INFORMATION
Make sure the nudge increment is set to a suitable value
before using the nudge facility to change the aim value. See Section 7.3.25,
“SETUP,
(Nudge Keys),” on page 90 to change the value of
increment for the nudge facility.
