Chapter 3. OPERATION
18 | ADTS 405 Mk2 Instruction Manual-English © 2015 General Electric Company – All rights reserved.
3.2.3 Units of Measure
When operating, in either pressure measure or pressure control modes, the ADTS 405 can display
the following unit information:
Table 3-1: Units of Measure
Figure 3-1: Front Panel
Aeronautical Functions
Display
Abbreviation
Displayed Units
(if applicable)
Altitude ALT ft, m
Calibrated and True Airspeed CAS, TAS kts, km/h, mph
Mach MACH -
Rate of Climb ROC ft/m, m/m, m/s, hm/m
Rate of Airspeed Rt CAS, kts/m, km/h/m, mph/m
Rate of Mach RtMCH Mach/m
Pressure Functions
Display
Abbreviation
Displayed Units
(if applicable)
Static (Absolute) Ps [P]
Pitot (Absolute) Pt [P]
Dynamic or Impact (Differential) Qc [P]
Engine Pressure Ratio EPR -
Rate of Ps Rt Ps [P]/m
Rate of Pt RtPt [P]/m
Rate of Qc Rt Qc [P]/m
Rate of EPR Rt EPR EPR/m
Where [P] is the currently selected pressure units from the following list:
mbar, inHg, mmHg, inH
2
O (4°C), inH
2
O (20°C), psi, hPa, kPa, inH
2
O (60°F), kg/cm2,%FS
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