1、Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Richmond, ATTN: DSCR-VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616 or e-mailed to STDZNMGTDLA.MIL. Since contact information can change, you may want to verify the currency of this address
2、information using the ASSIST database at http:/assist.daps.dla.mil. AMSC N/A FSC 6645 INCH-POUND MIL-DTL-81219C 20 April 2009 SUPERSEDING MIL-I-81219B(AS) 7 October 1987 DETAIL SPECIFICATION INDICATOR, ELAPSED TIME, ELECTROCHEMICAL Inactive for new design after 24 August 1998. This specification is
3、approved for use by all Departments and Agencies of the Department of Defense. 1 SCOPE 1.1 Scope. This specification covers the design and performance requirements for lightweight, small and low resolution electrochemical elapsed time indicators. 1.2 Part or Identifying Number. The PIN is as specifi
4、ed on the applicable MS sheet. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as exam
5、ples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3 and 4 of this specification, whether or not they are listed. Provided by IHSNot for ResaleNo reproduction o
6、r networking permitted without license from IHS-,-,-MIL-DTL-81219C 2 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these docum
7、ents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U S Military Property MIL-STD-202 - Test Method Standard, Electronic and Electrical Component Parts MIL-STD-889 - Dissimilar Metals MS90373 - Indicator, Elapsed Tim
8、e, Electrochemical (Copper) 115 Volt 50/2400 Hertz or 28 Volt DC MS90386 - Indicator, Elapsed Time, Electrochemical, (Mercury) 115 Volt AC 50/2400 Hertz, 28 Volt DC or 5 Volt DC (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Docu
9、ment Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related MS sheets), the text of this document takes precedence. Nothing in this document,
10、however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Materials. Materials shall conform to applicable specifications and as specified herein. Materials for which there are no applicable specifications, or which are not specifically de
11、scribed herein, shall be of the best quality, of the lightest practicable weight and suitable for the purpose intended. 3.1.1 Fungus-proof materials. Materials that are nutrients for fungi shall not be used where it is practical to avoid them. 3.1.2 Recycled, recovered, or environmentally preferable
12、 materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements and promotes economically advantageous life cycle costs. 3.1.3 Metals. Metals shall be of t
13、he corrosion resistant type or suitably treated to resist corrosion due to fuels, salt fog, or atmospheric conditions likely to be met in storage or normal service. 3.1.4 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals as defined in MIL-STD-889 shall no
14、t be used in intimate contact with each other. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-81219C 3 3.1.5 Nonmagnetic materials. Nonmagnetic materials shall be used for all parts of the transmitter except where magnetic materials are esse
15、ntial. 3.1.6 Non-ferrous materials. Non-ferrous materials shall be used for all parts of the indicator except where ferrous materials are required. 3.1.7 Corrosive fumes. Materials used in the construction of the transmitter shall not produce corrosive or deleterious fumes under the test conditions
16、specified herein. 3.1.8 Protective treatment. When materials are used in the construction of the indicator that are subject to deterioration when exposed to climatic and environmental conditions likely to occur during service usage, they shall be protected against such deterioration in a manner that
17、 will in no way prevent compliance with the performance requirements of this specification. Protective coatings that will crack, chip, or scale with age or the extremes of climatic and environmental conditions shall not be used. 3.2 Design and construction. 3.2.1 Design. The indicator shall be in ac
18、cordance with the applicable MS drawing and the requirements specified herein. 3.2.1.1 Size. The outline dimensions shall be in accordance with the applicable MS drawing. 3.2.1.2 Indication. The type and characteristics of the indication of the elapsed time shall be in accordance with the applicable
19、 MS drawing. 3.2.1.3 Sealing. Unless otherwise specified herein, the indicating cell shall be hermetically sealed or fully encapsulated. The hermetic sealing or encapsulation shall be accomplished such that the seal will not be dependent upon materials which will be adversely affected by the action
20、of any atmosphere to which the indicator may be subjected. 3.2.1.4 Scale. The indicator scale shall be in accordance with the applicable MS drawing and 3.2.1.4.1 and 3.2.1.4.2. 3.2.1.4.1 Scale visibility. The scale shall be so designed that the full scale of the indicator can be easily read at a dis
21、tance of 18 inches. There shall be no objectionable shadow on the graduated scale with general illumination and the indication cell shall be free from defects that would prevent the indicator from being easily read. Such defects include but are not limited to scratches, cracks and chips. This requir
22、ement applies both before and after the tests specified herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-81219C 4 3.2.1.4.2 Divisions. The timer scale shall be divided as below: a. MS90373 at least 10 scale divisions, each correspondin
23、g to 1/10th of the full scale length. b. MS90386 as specified on the MS sheet. 3.2.1.5 Terminals. The terminals shall be solder type and shall be capable of carrying the applicable current and voltage. 3.2.1.6 Polarity. On all DC indicators and regulators, the symbol “+” shall be marked or stamped i
24、n a permanent, legible manner on or as close to the positive terminal as is practicable. 3.2.1.7 Finish. The indicator shall be finished in a durable black color. The finish shall not melt, crack, blister or scale as a result of the tests specified herein 3.2.1.8 Identification of product. Meters, a
25、ssemblies and parts thereof shall be marked for identification in accordance with MIL-STD-130. The indicator shall be identified in accordance with the applicable MS sheet. 3.2.1.9 Interchangeability. All parts having the same manufacturers part number shall be directly and completely interchangeabl
26、e with each other in respect to installation and performance. 3.2.1.10 Holder. A mounting holder, when required, shall be in accordance with the applicable MS sheet. 3.2.1.11 Input power. The indicator shall supply the range of voltage, and if applicable frequency, specified on the applicable MS she
27、et. It shall be controllable over these ranges. 3.2.1.12 Weight. The total weight of the indicator or indicator assembly (indicator, holder and regulator) shall not exceed that specified on the applicable MS sheet. 3.2.2 Construction. The indicator shall be constructed so that no parts will work loo
28、se in service. It shall be built to withstand strains, jars, vibrations, and other conditions incident to shipment, storage, installation, and service. 3.3 Performance. The indicator shall give the specified performance when subjected to any of the tests or combinations of tests specified in section
29、 4. 3.4.1 Low temperature storage. The indicator shall withstand a temperature of -80C (-112F) as specified in 4.6.12 and meet the operational requirements of 3.4.8. 3.3.2 Dielectric strength. The indicator shall be capable of withstanding an application of 1500 Vac, 60 Hz between terminals and case
30、 at sea level barometric pressure without damage, arcing or current leakage in excess of 1 milliampere (see 4.6.3). 3.3.3 Thermal shock. Unless otherwise specified in the applicable MS sheet, the indicator shall operate without degradation through a range of -55C to 85C (-67F to 185F) Provided by IH
31、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-81219C 5 ambient (see 4.6.4). There shall be no warping, cracking or discoloration which would adversely affect the performance of the indicator. The indicator shall maintain its specified accuracy during and
32、 after the thermal shock. 3.3.4 Altitude. The indicator shall operate with barometric pressure ranging from 30 inches of mercury (sea level) to 0.82 inch of mercury (80,000 feet elevation) and with pressure varying at a maximum rate of 0.5 inch of mercury per second (see 4.6.6). 3.3.5 Salt atmospher
33、e. The indicator shall meet the operational check requirements of 3.4.8 after being subjected to the tests specified in 4.6.7. There shall be no signs of corrosion of the metal parts after the test. 3.3.6 Vibration. The indicator shall show no evidence of breakage, separation of electrolyte, permane
34、nt deformation or loosening of parts and shall be operative during and after subjection to the vibration test specified in 4.6.8. Application of the vibration shall be in each of the three principal planes. 3.3.7 Shock. The indicator shall show no evidence of breakage, separation of electrolyte, per
35、manent deformation or loosening of parts and shall be operative during and after subjection to the vibration test specified in 4.6.9. 3.3.8 Operational check. Each indicator shall meet the requirements specified in the applicable MS sheet (see 4.6.2). 3.3.9 Hermetic seal. The indicator shall show no
36、 evidence of leakage when tested as specified in 4.6.5. 3.3.10 Power consumption. Power consumption at rated voltage shall be in accordance with the applicable MS sheet (see 4.6.11). 3.3.11 Life accuracy. Unless otherwise specified in the applicable MS sheet, accuracy shall be within five percent (5
37、%) of actual elapsed time when tested in accordance with 4.6.10. 3.4 Workmanship. The indicator, including all parts and accessories, shall be so constructed and finished that it shall be free from all defects which would affect proper functioning in service. Particular attention shall be given to f
38、reedom from blemishes, defects, burrs and sharp edges, accuracy of dimensions, radii of fillets and marking of parts and assemblies (see 4.6.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-81219C 6 4. VERIFICATION 4.1 Classification of in
39、spections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Conformance inspection (see 4.5). 4.2 Inspection condition. Unless otherwise specified, all inspections shall be performed in accordance with test conditions specified in the
40、applicable test method document or applicable paragraph(s) in this specification. 4.2.1 Standard atmospheric conditions. Whenever the pressure and temperature existing at the time of the test are not specified, the test shall be conducted at an atmospheric pressure of 29.92 inches of mercury (Hg) an
41、d at an ambient temperature 25 C 5 C (77 F 9 F). 4.3 First article inspection. First article tests shall be performed when specified by the procuring document (see 6.2). 4.3.1 First article sample. The first article sample shall consist of three indicators for each voltage and hour rating combinatio
42、n. The indicators submitted for testing shall have been previously subjected only to the individual tests of 4.5.1. Samples shall have been manufactured by the manufacturers normal production process. 4.3.2 First article tests. The first article inspection shall consist of the examinations and tests
43、 specified below and in the MS sheet. Tests shall be performed in the order shown. Failure of any indicator to pass all the tests shall be considered a failure of the sample lot. Requirement Method a. Examination of product 3.2, 3.4 4.6.1 b. Operational check 3.3.8 4.6.2 c. Power consumption 3.3.10
44、4.6.11 d. Dielectric strength 3.3.2 4.6.3 e. Thermal shock 3.3.3 4.6.4 f. Vibration 3.3.6 4.6.8 g. Shock 3.3.7 4.6.9 h. Salt Atmosphere 3.3.5 4.6.7 i. Altitude 3.3.4 4.6.6 j. Hermetic seal 3.3.9 4.6.5 k. Life accuracy 3.3.11 4.6.10 l. Low temperature storage 3.3.1 4.6.12 4.4 Conformance inspection.
45、Conformance inspection shall consist of the individual tests of 4.4.1 for each unit produced, as well as the sampling plan of 4.4.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-81219C 7 4.4.1. Individual tests. Each transmitter shall be s
46、ubjected to the following tests as described in 4.6. a. Examination of product (see 4.6.1). b. Operational check (see 4.6.2) 4.4.2 Sampling plan. 4.4.2.1 Sample plan quantity. The quantity of indicators tested for conformance inspection shall be as follows: Quantity offered Quantity to test First 15
47、 1 Next 50 1 Next 75 1 Next 100 1 Each additional 200 1 or fraction thereof When a defective indicator is detected, no indicators from those still in stock or later produced shall be accepted until the extent and cause of failure have been determined and appropriately corrected. In addition, the sam
48、ple frequency shall be restarted at the 1 out of 15 level. 4.4.2.2 Sample plan tests. Sampling plan tests are in addition to the individual tests. a. Thermal Shock (see 4.6.4). b. Hermetic seal (see 4.6.5). c. Dielectric strength (see 4.6.3). 4.5 Disposition of tested indicators. Indicators which ha
49、ve been subjected to either first article inspection testing or conformance inspection sample plan testing may not be delivered on a contract specifying the military part number. 4.6 Methods. 4.6.1 Examination of product. Each indicator shall be inspected to determine compliance with the requirements specified herein with respect to materials, workmanship, marking, dimensions, and weight. 4.6.2 Op
