GE Druck ADTS 505

Druck ADTS 505 User Manual 3 - 19
K0260 Issue No. 8
3
3.7.4 Mach Test and Constant Mach
Example
 To go to 0.45 Mach, proceed as follows:
• Press LEAK MEASURE/CONTROL to enter Control Mode.
• Press SPEED/Qc then RATE to display rate of change of airspeed.
• The preset rate of speed is 300 kts/min.
• Press MACH/Pt.
• Enter an aim of 0.45.
• Wait for the Mach aim to be achieved.
• The system keeps the Mach aim constant by controlling/changing Pt (pitot) leaving Ps
(static) at a constant value.
 On completion of testing, select GROUND and wait for the `Safe at Ground' message to be displayed,
see 3.7.8., refit the pitot and static blanking caps.
Notes
1 If the altitude Ps (static) changes, the system automatically adjusts Pt (pitot) to keep the Mach
value constant.
2 Use the nudge facility for small changes to the Mach aim value.