Chapter 3. OPERATION
20 | ADTS 405 Mk2 Instruction Manual-English © 2015 General Electric Company – All rights reserved.
3.4 Operating modes
CAUTION Once initialised wait 15 minutes to allow the pressure measurement system
to reach a stable operating temperature. The “Warm-up” period can be reduced to 5
minutes if the system has been powered following a short period of inactivity.
The air data test system can now be set for a variety of functions and modes that follow:
1. Pressure measurement mode
2. Pressure control mode
3. Timed leak rate measurement
4. Control to local ground pressure
The ADTS 405 always powers-up in Measure mode with the pressure controllers off. When
changing to Control Mode the pump unit must be switched on and producing the correct pressure
and vacuum.
Each operating function shows the required key presses to set displays and selections.
Measure Mode (Pressure measurement mode)
To select the measured parameter press:
STATIC
PITOT
ALT SPEED MACH
Ps Qc Pt
or or
Measured value Units of measurement
Measured
parameter
Alt 10000
ft
Leak Measure
CAS 350 kts
Leak Measure
“leak-measure” when
measure mode selected
Change display single,
dual or triple press:
Change units from
aeronautical to pressure:
SETUP
SETUP
[MORE]
[CONTROL]
[Ps Pt DUAL]
[DISPLAYS/OPTIONS]
[DISPLAY TYPE]
[OPTIONS]
[UNITS]
[NEXT]
[PREV]
[SAVE]
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