Druck ADTS 505 User Manual 3 - 23
K0260 Issue No. 8
3
3.7.8 Go To Ground
On completion of testing and, before disconnecting from the aircraft system or UUT, the pressures
in the system must be taken to the local atmospheric pressure (ground) with zero airspeed.
• If the display shows "Leak Measure", press LEAK MEASURE/CONTROL.
• Press GROUND, (go to ground).
• The pressure in the system changes towards ground. The ground pressure replaces the
static or altitude aim value; zero replaces the airspeed aim.
Note: If required, new rates of change can be entered while going to ground.
• Wait for the display to show zero airspeed and atmospheric pressure.
• The display changes to "safe at ground" for 5 seconds then to "aircraft safe at ground"
with the message "confirming system settings .....".
Note: During this operation:
keep the power supply connected and switched on.
the system disables the key-pad.
it is safe to disconnect the pipes from the aircraft system or UUT.
• After completing this operation the display changes back to "safe at ground" with the
message "Press Clear/Quit to continue".
• It is now safe to continue testing or to switch off and disconnect the aircraft system or
UUT.
Note: If the ADTS 505 stays in the "safe at ground" for 30 minutes the
"confirming system settings ....." operation will be repeated. The
operation automatically re-checks the ADTS controller settings,
the pumps start and the display shows:
No pressure is applied to the output ports during this operation.
Shut-down
• When the airspeed is zero and the Ps channel pressure is close to ground, the
atmospheric pressure is re-measured to update the recorded ground pressure (QFE).
• Press QUIT/CLEAR to continue with normal operation; the ground and zero valves
automatically close.
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