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Category 3: Out of Specification
Diagnostic: Outside Sensor Limits
Functional Behavior:
The following diagnostic flags are set: “Out of Specification Status” and “Environmental Conditions Out of
Device Specification” (Bit 29 and Bit 23 are set to 1).
Causes and Triggers:
The diagnostic flag is set if the internal reading of the A/D converter present in the application processor
is out of range. This indicates that the internal temperature sensor present in the application processor
cannot be read, and there is no way of knowing if the instruments is operating within the advertised
environmental specifications (temperature). If the value read is within 200 mV below or 200 mV above the
lowest/highest possible ADC reading value this flag will be set.
Diagnostic: Environmental conditions out of device specification
Functional Behavior:
The following diagnostic flags are set: “Out of Specification Status” and “Outside Sensor Limits”
(Bit 29 and Bit 22 are set to 1).
Causes and Triggers:
The diagnostic flag is set if the internal reading of the A/D converter present in the application processor
indicates that the instrument is operating in temperatures that are below -40° or above 85°.
Category 4: Maintenance Required
Diagnostic: Fault Prediction
Functional Behavior:
The following diagnostic flags are set: “Maintenance Required Status” and “Fault Prediction Maintenance
Required” (Bit 28 and Bit 21 are set to 1).
Causes and Triggers:
The diagnostic flag is set if the device resets due to a brownout. Since the device is battery powered, this
indicates a drop in voltage, meaning that somethings is wrong with the power supply system.
Diagnostic: Power Is Critical Low
Functional Behavior:
The following diagnostic flags are set: “Maintenance Required Status” and “Power Is Critical Low:
Maintenance is needed short-term” (Bit 28 and Bit 20 are set to 1).
Causes and Triggers:
The diagnostic flag is set if the remaining battery capacity (DLMO.PowerSupplyStatus = 3 ) is less than
25% and battery life (DLMO.EnergyLeft) is less than 10 days.
