barfield DALT55 Instruction Supplement
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DALT55 INSTRUCTION SUPPLEMENT61-101-02184_02186-B Page 1/14Jan /10 /20131. GENERAL INFORMATION1.1 PurposeElectronic pressure sensors are far more stable, damage-resistant andmore widely available than analog instruments. The DALT55 is designedas a digital, retrofit replacement for the current analog altimeter instrumentfound in the 1811 Pitot-Static Test Set series and equivalent testers. Thefit, form and size of the DALT55 allows for easy installation into the test set.1.2 DescriptionData on the DALT55 shows on a graphic liquid crystal display (LCD). Thedisplay is backlit with an auto-shutdown timer for battery life protection. Abattery pack supplies the power for the instrument. A keypad is used foraccess to, and movement through, the menu functions shown on thedisplay. Additional keys on the keypad allow adjustment of the displaycontrast. The icons also serve as an indication of the battery power leveland show the two-instrument state.1.3 FeaturesThe DALT55 calculates and displays such aeronautical data as altitude,vertical speed, differential or Pitot* pressure, and engine pressure ratio*(EPR). It may perform an automatic static leak test or a calibrationprocedure.NOTE: * Feature is available when DALT55 and DAS650 are connected aspart of instrument configuration.Units of measurements for the DALT55 are user-determined andselectable. Units for aeronautical data can be expressed in feet, feet perminute (English), in meters and meters/minute. Units for static pressuredata are available in inHg abs, mb abs or psia. The user may also choosebetween the Aeronautical or Pressure display.The DALT55 allows the user to retrieve maintenance information such asinstrument serial number (S/N), manufacturer part number (P/N),configuration of single or dual instruments, time, date and password settingand enabling automatic power off. |
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