K114 Issue No. 9
Druck ADTS 405 User Manual 3 - 21
3
Aircraft System Protection
The ADTS 405 protects the aircraft system against user error and leaks in the aircraft
system.
Note: The pumps must be switched on.
The system protection operates:
Limit checking of user entered set-points.
Automatic regain of control if leak rate is over limit during leak testing.
Automatic regain of control if a leak takes the system pressures outside of
limits.
Mach Test and Constant Mach
To go to 0.8 Mach, enter Control Mode and proceed as follows:
Press SPEED then RATE to select rate of change of airspeed.
Enter required rate, e.g. 300 kts/min.
Press MACH.
Enter 0.8.
Wait for the Mach to be achieved.
Note: If the altitude changes the system automatically adjusts the airspeed to
keep the Mach value constant.
True Airspeed
The normal airspeed parameter is Calibrated Airspeed (CAS) (equivalent to IAS for
testing purposes).
The airspeed parameter may be changed to True Airspeed (TAS) as follows:
Press SETUP then SPEED.
Select [CAS/TAS].
Select [TAS].
Press QUIT/CLEAR repeatedly to exit set-up.
Press SPEED.
The display now shows the airspeed parameter as TAS.
Note: Airspeed parameter type can only be changed in Full Set-up mode. Rate of
change of airspeed will still be shown as Rate CAS.
Pitot temperature (Tt) is used in the calculation of TAS. To enter Tt:
Press SETUP.
Press SPEED.
Select [Pt TEMPERATURE].
Enter the temperature measured by the aircraft's Pitot temperature sensor.
Press QUIT/CLEAR three times to return to user display.
Note: Pitot temperature can only be changed in Full Set-up mode.
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