GE Druck ADTS 405 R/F Mk2, Instruction Manual

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Introduction
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6.2.9 RATE
1. In aeronautical units (kts, km/h), this key selects a rate of change of airspeed (Rate CAS)
display. The following rates are available in aeronautical units:
* Rate CAS is displayed with the airspeed in either CAS or TAS.
2. In pressure units (mbar, inHg etc.), this key selects a rate of change of pressure (Rate Qc,
Rate Pt or Rate EPR) display. The actual display depends on the parameter selected before
pressing
RATE . The following rates are available in pressure units:
3. If set-up mode is not switched off, SETUP , [UNITS] can be used to change the units of
display.
4. A new rate aim can be entered using the numeric keys, if the unit is in Control Mode (Aim
displayed). Use
LEAK MEASURE/CONTROL , to change between Control and Measure
mode.
5. If the automatic airspeed rate is selected (using SETUP, RATE ) the airspeed rate is
automatically adjusted to simultaneously achieve both altitude and airspeed aim values.
This adjustment normally requires a reduction in the rate from the aim value; the rate does
not exceed the aim value. When airspeed (not Qc) is automatically reduced, the display
shows
(A) after RATE CAS.
6.2.10 LEAK MEASURE/CONTROL
This key switches between MEASURE and CONTROL mode. The controllers are switched off in
Measure mode, so it can be used to measure leaks in the aircraft system.
Note:
The pneumatic supply pumps must be switched on before going to
CONTROL mode.
1. In Measure mode, the display shows “LEAK MEASURE”.
2. Press LEAK MEASURE/CONTROL to switch the controllers on.
3. The display briefly shows “REGAINING CONTROL” while the pressure controllers adjust to
the system pressure. No significant pressure transients are produced when regaining
control.
4. In “CONTROL” mode, the display shows “Aim” value.
5. 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.
Key-press sequence Rate of change display
SPEED, RATE Rate CAS *
MACH, RATE Rate MACH
Key-press sequence Rate of change display
Qc, RATE Rate Qc
Pt, RATE Rate Pt
EPR, RATE Rate EPR