view D60253 operations manual - AvionTEq

PennyfGiles11,~,l";{')'~~\iiW~~~~ ~ r.. ,.•~' IAvionics SystemsDivision1.0 DESCRIPTIONThe Computer Controlled Air Data Test Set (CCADTS) has beendesigned to be sufficiently rugged for 1st line on aircraftapplications with accuracy suitable for 2nd and 3rd lineworkshop use.The CCADTS is a self contained unit for use withvacuum and pressure supplies.externalThe CCADTS comprisescontrols, sensors andof a main unitcomputer, with ahousing pneumaticseparate compactremote control and display unit. The CCADTS may be used ineither of two formats.(i) With the Remote Control and Display Unit (RCDU)mounted directly onto the front of the mainCalibrator /Control Unit (CCU), which is its normaloperating and storage position.(ii) with the RCDU operating up to 25m from theconnected via an optional electrical cable.this mode 1st line testing of equipmentsimplified by taking just the RCDU intoaircraft, with the main CCU remaining outside.CCU,InistheThe fold-out sheet (Fig. 1), at the back of this instructionmanual, shows the front panel layout of the test set with theRCDU fixed to the main CCU.The control and measurement system is based on a 16 bitprocessor and circuitry developed for airborne primary airdata computers. The pressure sensors employed in the CCADTSare designed for air data applications. There are three suchsensors used, two being of the vibrating cylinder type, and athird to monitor differential pressures, providing accuratemeasurement of airspeed down to 20 knots. This transducer isof the type used in the Penny and Giles pitot-static test setcurrently in use with military and civil helicopter operatorsworld wide.The RCDU housing is compact and easily handled in theaircraft flight deck, environment. The optionalinterconnecting lead between RCDU and CCU is a customdesigned multicore coaxial cable to ensure resistance toaviation hydraulic liquids. The equipment has been designedto ensure electromagnetic compatability within the expectedaviation environment.A dedicated printer is available which, when selected,allow direct copies of screen displays to be made.Section 3.3 below.willSee19 May 1989Rev: 1 10 Dec 1990PUB 121Page 4