GE Druck ADTS 405, User Manual

Page: 99 / 134

6 - 7
Druck ADTS 405 User Manual
K114 Issue No. 9
6
The controllers can be switched off to measure leaks in the aircraft system.
When in leak measure mode, the display shows “LEAK MEASURE” .
Press LEAK MEASURE/CONTROL to switch the controllers on. The display briefly shows
“REGAINING CONTROL” while the pressure controllers adjust to the system pressure.
No significant pressure transients are produced when regaining control.
When in control mode, the display shows “Aim" value.
Two safety systems are built-in to protect the aircraft systems during leak testing.
These are Auto Leak recovery and Auto Limit recovery.
Auto Leak recovery automatically regains control if the leak rate exceeds the currently
set limits on either channel.
Auto Leak recovery can be switched off using SETUP, LEAK MEASURE/CONTROL , [AUTO
LEAK].
If negative airspeed or Qc occurs in measure mode, the zero valve automatically opens
for a period of one second to balance the airspeed or Qc. This only applies when the
minimum CAS (or Qc) limit is zero.
Note: This only applies when the minimum CAS or Qc limit is zero.
Auto Limit recovery automatically regains control if the pressure on either channel
leaks outside of the selected limits, (except for negative airspeeds).
Auto Limit recovery can be switched off using SETUP, LEAK MEASURE/CONTROL , [AUTO
LIMIT].
Note: Auto Limit and Auto Leak recovery functions require the pneumatic supply pump to be
switched on.
GROUND
This key enables a display of ground pressure or automatically controls the pressures
in the aircraft system to local atmospheric pressure.
The local atmospheric pressure is recorded by the ADTS 405 during the power-up
sequence.