3 - 2 Operation
K0260 Issue No. 8
3.2 Display Functions and Units of Measure
When operating in either pressure measuring or pressure controlling modes, the ADTS 505 can
display the following information:
Aeronautical Functions
Display Abbreviation Displayed Units
(if applicable)
Altitude ALT ft, m
Calibrated Airspeed CAS kts, km/h, mph
Mach MACH -
Rate of Climb ROC ft/min, m/min, m/s, hm/min
Rate of Airspeed Rt CAS kts/min, km/h/min, mph/min
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] /min
Rate of Pt Rt Pt [P] /min
Rate of Qc Rt Qc [P] /min
Rate of EPR Rt EPR EPR/min
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), inH
2
O (60°F), psi, hPa, kPa.
Operating Range and Performance
The ADTS 505 is supplied with a full-scale range of 650 knots for measurement and control of the
pitot pressure channel. The unit can measure altitude up to 105,000 ft; altitude control depends
on the performance of the pump, the integral pump is capable of achieving -2000 to 60,000 ft.
Refer to section 6 for more details of performance and specification.
Sets of factory-defined limits known as ARINC565, Standard, Military, Max and EPR can be selected
through the SETUP menu (see Reference section 6). Operators may also define up to five sets of
additional limits for different aircraft types. When configuring the display to aeronautical or
pressure units operators should be aware that when units of pressure are selected, wider full-scale
pressure limits will be enabled for some parameters.
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