Table of Contents
1.0INTRODUCTIONANDDESCRIPTION
1.1PurposeofthisCharacteristic
1.2FunctionoftheEquipment
1.3Reliability
1.4UnitDescription
1.4.1TimeBaseUnit
1.4.2TimeDisplayUnit
1.5InterchangeabilityRequirements
1.5.1GeneralRequirementsforInterchangeability
1.5.2InterchangeabilityRequirementsfortheARINC585
ElectronicChronometerSystem
1.6RegulatoryApproval
2.0STANDARDSREQUIREDTOEFFECTINTERCHANGEABILITY
2.1FormFactorsandConnectors
2.1.1.TimeBaseUnitFormFactor
2.1.1.1Cooling
2.1.2TimeDisplayUnitFormFactor
2.2SignalCharacteristics
2.3StandardInterwiring
2.4PowerCircuitry
3.0SYSTEMDESIGNCONSIDERATIONS
3.1TimeDisplayOutput
3.2UtilizationEquipmentOutput
3.3WarningDevices
3.4InputPower
3.4.1BatteryBusInput
3.4.2SystemPowerInput
3.5InstrumentPower
3.5.1PowerSource
3.5.2BrightnessControl
3.6InstrumentLightingPower
3.7ManualTimeSetting
3.8ChronographRemoteSwitch
3.9AccuracyoftheECS
3.10TimeDisplayUnitSettingAccuracies
3.10.1ChronographSettingAccuracy
3.10.2ElapsedTimeSettingAccuracy
4.0DIGITALSIGNALCHARACTERISTICS
4.1TimeDisplayInterface
4.2UtilizationEquipmentInterface
Attachments
1EnvironmentalTestCategories
2TimeBaseUnitConnectorPositioning
3ElectronicChronometerSystemInterwiring
4DataInterfaceBlockDiagram
5Figure1-Word/FrameStructure
Figure2-DigitalDataStandards Abstract
Describes an Electronic Chronometer that provides time-of-day (GMT) indication to the flight crew, as well as providing this data in digital form for use by other avionic systems. In addition, the ECS provides an Elapsed Time Indicator (hours and minutes) with a start/stop/reset function and a chronograph function.
