NPFC - MIL-R-122
RESISTORS, FIXED, PRECISION, ESTABLISHED RELIABILITY, GENERAL SPECIFICATION FOR
| Organization: | NPFC |
| Publication Date: | 19 February 1990 |
| Status: | active |
| Page Count: | 50 |
scope:
This specification covers the general requirements for hermetically sealed, high precision, low reactance, fixed, resistors that possess a high degree of stability with respect to time under severe environmental conditions, with an established reliability. Resistors covered by this specification have life failure rates ranging from 1 percent to 0.001 percent per 1,000 hours (see 1.2.1.2). These failure rates are established at 60 percent confidence on the basis of life tests. The failure rate (FR), identified by the appropriate symbol, is referred to operation at full rated voltage and rated temperature, with a permissible change of ±0.5 percent in resistance as the criteria for failure (see 6.1). A part per million (ppm) quality system is used for documenting and reporting the average outgoing quality of resistors supplied to this specification. Statistical process control (SPC) techniques are required in the manufacturing process to minimize variation in production of resistors supplied to the requirements of this specification.
intended Use:
The resistors covered by this specification are intended for use in application where high precision and stability are required.
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