1、MILIT. RY SPECIFIC, MI L-D-81227B E5 Decarber 1976 SUPERSEDING MIL-D-81227A 24 June 1971 TION DETECTOR KIT, WATER, AUTOMOTIVE - AVIATION FUEL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE P - v 1.1 Scope. This specification covers two t
2、ypes of electrically operated free water kits, designated as Model MK II. 1.2 Classification. The detector kits shall be of the following types as specified (see 6.1 and 6.2). Type I - Water detector, Mk II with viewer and pads. Type III - Water detector, Mk II with viewer and battery case. Designat
3、ed as KMU-352/E. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent spec- fied herein. SPECIFIC ATIONS FEDERAL W-C-596 - Connector, Plug, Electrical, Connector, Receptacle,
4、 Electrical QQ-C-320 - Chromium Plating (Electrodeposited) QQ-N-290 - Nickel Plating (Electrodeposited) QQ-P-416 - Plating, Cadmium (Electrodeposited) PPP-B-585 - Box, Wood, Wirebound Beneficial comments (fecommendations, additions, deletions) and any pertinent data which may be of use in improving
5、this document should be addressed to: Engineering Specifications and Standards Department (Code 93), Naval AU Engi- neering Center, Lakehurst, NJ 08733, by using the self-addressed Standardizatiom Document improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 66
6、40 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-BL227B 66 = 7779706 OL429O 7 - MIL-D-81227B FEDERAL (Continued) PPP-B-601 - Box, Wood, Cleated-Plywood PPP-B-621 - Box, Wood, Nailed and Lock-Corner PPP-B-636 - Box, Shipping, Fiberboard MILITA
7、RY MIbE-5558 - Enamel, Wrinkle Finish, for Aircraft Use MIL-M-7298 - Manual, Technical, Commercial Equipment MIL-S-7742 - Screw Threads; Standard, Optimum Selected Series, General Specification for MIL-S-8516 - Sealing Compound, Polysulfide Rubber Electric Connectors and Electric Systems, Chemically
8、 Cured MIGA-8625 - Anodic Coatings, for Aluminum and Aluminum Alloys MIL-L-10547 - Liners, Case, and Sheet, Overwrap; Water-Vaporproof or Waterproof, Flexible MIL-D-81248 - Detector Pad, Free Water MIL-S-81282 - Standard, Free Water Detector STANDARDS FEDERAL FED-STD-595 - Colors MILITARY MIL-STD-10
9、5 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage MIL-STD-130 - Identification Marking of U. S. Military Property MS35489 - Grommet, Rubber, Hot Oil and Coolant Resistant PUB LICA TION S U.S. AIR FORCE TECHNICAL ORDER T, O. 42B-1.1 - Quali
10、ty Control of Fuels and Lubricants 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-81227B (Copies of specification, standards, drawings, and publications, required by suppliers in connection with specific procurement functions should be obtai
11、ned from the procuring activity or as directed by the contracting officer. ) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on the date of invitation for bids or request for proposal sh
12、all apply. UNIFORM CLASSIFICATION COMMITTEE Uniform Freight Classification 4 (Application for copies should be addressed to Uniform Classification Com- mittee, Room 202 Union Station, 516 W. Jackson Blvd., Chicago, Illinois 60606. ) 3. REQUIREMENTS . 3.1 First article. The water detector kit furnish
13、ed under this speci- fication shall be a product which has been inspected and has passed the first article inspection specified herein (see 4.3). 3.2 Materials. Materials shall conform to the applicable specifica- tions as listed or required herein. Materials which are not covered by specifications,
14、 or which are not specifically described herein, shall be of the best quality, of the lightest practical weight and suitable for the purpose intended. 3.2.1 Metals. Metals for all component parts shall be in accordance with those specified in Figure 1. 3.2.2 Fungusproof materials. Materials which ar
15、e nutrients for fungi shall not be used in the detector kit where it is practical to avoid them. Where used and not hermetically sealed, they shall be treated with a fungicidal agent acceptable to the procuring activity. 3.2.3 Electrical. 3.2.3.1 Power requirement. The Mk II Free Water Detector shal
16、l be designed to operate on 120 volts DC, as indicated in Figure 1, or 120 volts A. C., 60 hertz. Y 3.2.3.2 Wiring. External and internal wiring shall be in accordance with Figures 1 and 3. The internal wiring shall be neat and accomplished in such a manner that individual wires may be easily traced
17、. 3.2.4 Threads. Screw threads O. 060 inch in diameter or larger shall be in accordance with MIL-S-7742. 3.2.5 Weight. The weight of the completely assembled Water Detector Kit shall not exceed 5 pounds for Type I and 15 pounds for Type III. This weight does not include batteries. 3 Provided by IHSN
18、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.20 6.1 Aluminum alloy protection. Unless otherwise specified, all alum- inum alloy parts shallbe coated with an anodic film, dyed matte black, in accordance with Class 2, MIL-A-8625. 3.2.6.2 Exterior finish. Where ap
19、plicable, the exterior finish shall be in accordance with MIL-E-5558, Type I or II, using Federal Standard No. 595, Color 17038. 3.2. 6.3 Interior finish. Unless otherwise specified, the interior requires only the coating specified in 3.2.6.1, A 3.3 Identification of product. A nameplate, in accorda
20、nce with Figure 2 shall be securely attached to the exterior of the case, and shall be legibly and durably marked with the NSN (see 6.5) and information as follows: for Type I - Viewer Kit, Free Water Detector, Model No. MK II for Type III - Viewer, Free Water Detector, Model No. KMU-352/E I 3.4 Ser
21、vice data package. A service data package consisting of materials and manuals, as described below, shall be furnished, in an envelope, with each unit. Detector pads (3.4.2) while not physically in the envelope shall be con- sidered part of the service data package. 3.4.1 Standards. A total of 3 stan
22、dards conforming to MIL-S-81282, shall be provided with each unit. The standards shall be included in the envelope, or optionally, one may be attached to the unit as specified in 3.5.2.1. Instructions for attaching the standard to the unit shall be included. The standards shall be supplied to the co
23、ntractor as Government furnished material (see 6.4). 3.4.2 Detector pads. Each Type I service data package shall contain 500 free water detector pads (47 mm) conforming to MIL-D-81248. The pads shall be supplied to the contractor as Government furnished material (see 6.4). 3.4.3 Technical manual. Ea
24、ch data package shall contain two copies of an approved technical manual (see 4.3.1.1). The manual shall be prepared in accord- ance with MIL-M-7298 and shail include a list of component parts; complete instruc- tions for installation, operation, placement and replacement of batteries for Type III,
25、standards and the fiuorescent lamp; and maintenance of the unit. 3.4.3.1 Schematic drawing Typ e III only. Type III Technical Manual shall contain a schematic drawing of the battery case and free water detector. The manual shall include a statement: Air Force personnel shall consult AF Publication T
26、O 42B-1.1 for additional information on the use of this detector. 4 - Y Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILD- 8 1227.B 3.5 Design and construction. The Free Water Detector shall be a portable unit capable of determining the amount of
27、free or undissolved water sus- pended in fuels. The kit shall be capable of being handcarried by personnel to a fueling site for the purpose of.analyzing fuel for water content. The instrument shall withstand the normal strains, jars, vibrations and any other conditions incident to service use. The
28、detector (Type I and III) shall be constructed in accordance with Figures 1, 2, and 3 as applicable. Type III shall include the battery case described in 3.5.2.3. 3.5.1 Performance. 3.5.1.1 .a - Slide. The slide shall move freely without binding on any part of the exterior of the box. 4 3.5.1.2 Elec
29、trical system. The electrical system shall be activated by holding both momentary switches in the llonll position until the ultraviolet bulb lights. At this time, the starter switch (see Figure 1) shall be released. The system shall deactivate when the second switch is released. 3.5.1.3 Standards. T
30、here shall be no decrease in fluorescence at the edges of the standard (as a result of positioning of the standard) when the detector is tested as described in 4.5.3. 3.5.2 Component parts. The component parts of the detector shall be as specified below and in the figures in this specification. 3.5.
31、2.1 Standards. The standard shall conform to MIL-S-81282 and shall be capable of being securely attached to the retaining strip, mounted in such a man- ner that the edge is flush with the overhanging edge of the strip. Standards shall be Government furnished (see 6.4). 3.5.2.2 Viewer assembly. The v
32、iewer assembly shall have the capability of indicating water content of fuel samples in parts per million. This indication shall be made after the 47 mm detector pads which conform to MIL-D-81248 are subjected to the passage of 500 rnl of fuel on the upstream surface of the sampling apparatus. When
33、using the 37 mm diameter detector pads and taking line samples (i. e., the fuel sample is passed directly through the detector pad without first being collected in a sample bottle) only 300 mi of the fuel shall be passed through the detector pad. The viewer shall indicate the water content by compar
34、ing the detector pad with the four fluorescing standards. If water droplets are present in the sample, they will dis- perse on the pad and cause the sodium fluorescein treated pads to fluoresce under an ultraviolet light. The design of the viewer shall be in conformance with Figures 1, 2, and 3. 3.5
35、.2.3 Batte,ry case, Type only. The battery case shall be fabricated from the same materials specified for the detector housing (Figure 1) except that the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D-81227B thickness shall be not less than
36、1/16 inch. A synthetic or natural rubber pad shall be securely attached to each of the bottom corners of the case. The overall outer dimensions shall approximate those of the detector, except that the height shall not exceed 3 inches (not including rubber pads). The completed case shall be capable o
37、f supporting the total weight of the detector without evidence of distortion or buckling. The case shall not wobble or rock when placed on a flat surface. All component parts of the case shall be securely mounted to prevent movement when the case is carried or tipped to any angle. 3.5.2.3.1 Battery
38、compartment. The battery compartment shall accommo- date two (2) 69 volt batteries, each 8 by 2 by 2-1/2 inch (Burgess Battery Company 2-46) or equal. The batteries shall be easily inserted or removed from the compart- ment? When positioned within the compartment, the batteries shall be side by side
39、, lengthwise, and shall make positive contact with the terminal board contacts (3.5.2.3.4). As positioned, the upper battery terminal shall be the positive pole, Unless otherwise specified (see 6.2), batteries shall not be supplied with the battery case. 3.5.2.3.2 Battery clamping device. The batter
40、ies shall be held in position by a device which maintains sufficient pressure for continuous electrical contact between the battery and terminal board regardless of movement or position of the battery case. The clamping or holding device shall be positioned within the battery cage manually or by usi
41、ng only a screwdriver. Resistor. A 600 (10%) ohm, 10 watt, resistor shall be mounted 3.5.2.3.3 within the battery case. 3.5.2.3.4 Terminal board. The battery terminal board shall be fabricated from phenolic fiberboard that has 1/4-inch minimum thickness. The battery termi- nal board shall have perma
42、nently mounted battery terminals with helical wire coil type compression springs to make electrical contact with the batteries; or optionally, flat beryllium copper or phosphor bronze leaf type springs may be used. The board shall be vertically mounted within the battery case so that it is parallel
43、to the width of the case. The battery terminals on the terminal board shall be aligned so that each pair of contacts (for the individual battery) is in a vertical line which is perpen- dicular to the bottom of the battery case. A permanent marking, identifying the positive contact of each pair of co
44、ntacts shall be conspicuously placed within the battery case. 3.5.2.3.5 Receptacle. A 125-volt, 15-ampere electrically rated receptacle, compatible with the plug specified for the detector, shall be securely mounted, to prevent movement, in a ffcut-outff in the wall nearest the terminal board, The r
45、ecep- tacle shall be situated to allow plug insertion or removal to be accomplished from the outside. All mounting hardware, brackets, and screws for the receptacle shall be corrosion resisting steel. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
46、-MIL-D-81227B 3.5.2.3.6 Wiring. Adequate electrical wiring (Figure 1 schematic) shall be provided entirely within the battery case to interconnect the terminal board contacts, the resistor and the receptacle. The terminal board wiring shall be such that the topmost contacts are for connection with t
47、he positive contact of the battery. There shall be no incomplete or cold solder joints, and no danger of electrical “shorting“ of components with the metal case. 3.5.2.4 Coupling devices, Type III. The detector and battery case shall be coupled as specified below, to form a Type III unit. The batter
48、y case shall be bottom mounted. All mounting hardware shall be suitably plated to resist corrosion and shall be positioned so as not to interfere with the proper assembling of the inter- na1 components of the detector and battery case, including the batteries. 3.5.2.4.1 Hinges. The battery case shal
49、l be hinged to the detector along the length that is adjacent to the test pad holder. One 9-1/2 inch hinge, or 2 smaller hinges placed equidistant from the centerpoint shall be used. The hinges shall be designed to permit the top mounted detector to be opened a minimum of 174 degrees. In addition the smaller hinges shall permit quick assembly or disassembly of the two units. 3.5.2.4.2 Latches. Two toggle action draw bolt type latches shall be mounted on the
