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12. In Control Mode (AIM display), a new CAS or Qc can be entered using the numeric keys. Use
LEAK MEASURE/CONTROL to change between control and measure mode.
6.2.4 MACH/Pt
1.
In aeronautical units (ft/kts or m/km/h), this key selects a Mach display.
2.
In pressure units (mbar, inHg etc.), this selects a total pressure (Pt) display.
3.
If the altitude aim is changed, after the entry of CAS, the Mach and TAS aim values change
while the CAS value remains unchanged*. If the altitude aim is changed, after the entry of
TAS or Mach, the CAS aim value changes while the TAS and Mach values remain
unchanged*.
* The display shows = symbol next to the parameter that remains unchanged.
4.
If the Ps aim is changed, after the entry of Qc, then the Pt aim value changes while the Qc
remains unchanged*.
5.
If the Ps aim is changed, after the entry of Pt, then the Qc aim value changes while the Pt
remains unchanged*.
6.
Before entering a new Mach or Pt aim, set the rate of change of speed using the SPEED/Qc
key.
7.
Press the RATE key.
8.
In Control Mode (AIM display), a new Mach or Pt aim can be entered using the numeric
keys, Use LEAK MEASURE/CONTROL to change between control and measure mode.
6.2.5 EPR
The ADTS 405 can be used to check EPR sensors and indicators.
1.
Engine Pressure Ratio (EPR) is only available in pressure units (mbar, inHg etc.).
2.
For EPR testing, use Ps as INLET pressure and EPR to set the ratio of OUTLET pressure (Pt)
to INLET pressure.
3.
Before entering a new EPR aim, the rate of change should be set using the RATE key.
4.
In Control Mode (Aim display), a new EPR aim can be entered using the numeric keys. Use
LEAK MEASURE/CONTROL to enter measure mode and make the appropriate Ps and Pt
control state changes.
6.2.6 ROC/Ps RATE
1.
In aeronautical units (ft or m), this key selects a Rate of Climb (ROC) or vertical speed
display.
2.
In pressure units (mbar, inHg etc.), this key selects a rate of change of Ps display.
3.
SETUP, [UNITS] can be used to change the units, if set-up mode is not switched off.
4.
In Control Mode (AIM display), a new ROC or Ps rate can be entered using the numeric keys.
Use LEAK MEASURE/CONTROL to change between control and measure mode.
6.2.7 RATE TIMER
The RATE TIMER key starts an internal timer for one of three pre-defined times. On the completion
of the time period, the average rate of change over the time period is displayed.
Each selected TIME period can have an associated WAIT period to allow pressures to settle before
the timing starts. The WAIT period counts down to zero before the TIME period starts.
© 2015 General Electric Company – All rights reserved.
Introduction
ADTS 405 Mk2 Instruction Manual-English | 73
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