GE ADTS 542 Instruction Manual page 61

P S
ITOT TATIC
Figure 3-6: Measure mode screen - Multi Channel
You can switch the system between aero units and pressure units using the toggle control (4).
Control mode
When CONTROL mode is selected at icon (1), the ADTS pumps and pressure control functions are acti-
vated but will not cause any change in the current pressures unless requested by the operator.
The CONTROL mode screen also displays real time Pitot Static parameter measurements based on
the current pressures and rates of change of pressures present at the Ps and Pt ports. It also has a
'Aim' field for each parameter to allow you to enter new target values for the controller of the ADTS or
any connected aircraft systems.
This screen may be configured at icon (2) to accept and present data in either aeronautical or pressure
units.
The Pt channel display may be configured at icon (3) to present either CAS or Mach (when in Aero
units) and either Qc or Pt (when in Pressure units).
A progress bar (4) indicates rate and percentage completion towards the requested new target aim.
The effort meter (5) can swing left or right according to whether control of the requested pressure for
that channel is requiring predominantly vacuum (left) or pressure (right), e.g, an excessive left swing
when at an altitude set-point might give early indication of a leak to atmosphere (continuous drain on
vacuum pump resource).
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