Entering Other MIL-HDBK-217 Miscellaneous Parts
The following table describes the part parameters required for other subcategories of miscellaneous parts when a MIL-HDBK-217 model is selected for the calculation. The other subcategories supported by this model are:
• Ferrite Device, Microwave
• Filter
• Fuse
• Incandescent Lamp
• Load, Dummy or Microwave
• Meter
• Microwave Element
• Neon Lamp
• Quartz Crystal
• Termination
• Vibrator
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If No data required is shown in the Prediction Data pane, the model either uses no part-specific parameters in its failure rate equation, or the model uses a constant failure rate. Clicking Pi Factors opens the Pi Factors window, where you can view Pi factors for the failure rate equation and/or the failure rate. For more information, see Part Pi Factors.
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Parameter
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Type
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Description
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Quality Level
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Choice List [Parts Count also]
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Required only for the following subcategories: Filter, Meter, and Quartz Crystal.
The quality screening level used in the manufacturing of the device. Choices are:
• Mil-Spec
• Commercial
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Type
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Choice List [Parts Count also]
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Required only for the following subcategories: Ferrite Device, Microwave; Incandescent Lamp; Load, Dummy or Microwave; Meter; Microwave Element; and Vibrator.
The type of device. Choices vary by subcategory.
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Composition
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Choice List [Parts Count also]
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Required only for the Filter subcategory.
The composition of the filter. Choices include:
• Ceramic Ferrite, MIL-F-15733
• Composition 1, MIL-F-18327
• Composition 2, MIL-F-18327
• Discrete LC, MIL-F-15733
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Application
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Choice List
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Required only for the following subcategories: Incandescent Lamp and Meter.
The type of current. Choices are:
• AC
• DC
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Utilization
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Choice List
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Required only for the Incandescent Lamp category.
The ratio of illumination hours to total equipment operating hours. Choices are:
• < 0.10
• 0.10 to 0.90
• 0.90
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Rated Voltage
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Real (Volts)
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Required only for the Incandescent Lamp subcategory.
The rated voltage of the device.
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Function
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Choice List [Parts Count also]
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Required only for the Meter subcategory.
Indicates the function of the meter. Choices are:
• Ammeter
• Voltmeter
• Other
Choose Other for meters whose basic meter movement construction is an ammeter with associated internal conversion elements.
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[Temperature Parameters]
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For more information, see Basic Temperature Parameters.
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[Derating Parameters]
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For more information, see Derating Parameters.
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