DLA MIL-W-36775 A-1979 WET BULB-GLOBE TEMPERATURE KIT《湿球温度试剂盒》.pdf

1、MIL-W-36775A bb 7977906 0337323 4 E-= -1 I . MIL-W-36775A( DLA-DM) 28 February 1979 SUPERSEDING MIL-W-36775 (DSA-DM) 27 August 1971 MILITARY SPECIFICATION WET BULB-GLOBE TEMPERATURE KIT This limited coordination military specification has been prepared by the Defense Personnel Support Center based u

2、pon currently available technical information. It is subject to modification. coordinated military specification, it may be used in pro- curemen t. However, pending its promulgation as a 1. SCOPE 1.1 Scope. This specificat on covers a small lightweight hand-held wet bulb-globe temperature kit for pr

3、oviding an index of heat stress in out- door areas of hot and humid cl mates, in order to control and prevent heat casualties during troop training exercises. The heat stress index is com- puted by the weighted addi tion of readings obtained from three different thermometers. 2. APPLICABLE DOCUMENTS

4、 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposals, form a part of this specification to the extent specified herein. SPEC1 FICAT IONS FEDERAL i r P-C-436 - Cleaning Compound, Al ka1 i, Boiling Vat. I -_ TT- E- 527 TT-P-17

5、57 - Enamel , Alkyd, Lustreless. - Lacquer, Ni troce1 1 Ulose, Acryl i c and Acryl i c-Butyrate , - Primer Coating, Zinc Chromate, Low-Moisture-Sensitivity. - TT-L-50 Aerosol (in Pressurized Dispensers). Beneficial comments (recommendations, additions, deletions) and any perti- nent data which may b

6、e of use in improving this document should be addressed to: Headquarters , Defense Personnel Support Center, ATTN: Di rectorate of Medi cal Materiel , CODE-ATT, 2800 South 20th Street, Phi 1 adel phi a, PA 191 O1 , by using the self-addressed Standardization Document Improvement Proposal (DD Form 14

7、26) appearaing at the end of this document or by letter. FSC 6665 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-W-36775A( DLA- DM) PPP-B-566 - Boxes Fol ding , Paperboard. PPP-B-636 PPP-B-676 - Boxes, Setup. - Boxes , Fi berboard. STANDARDS M

8、I L ITARY MIL-STD-105 MIL-STD-129 MIL-STD-171 Sampling Procedures and Tables Por Inspection by - Marking for Shipment and Storage. - Finishing of Metal and Wood Surfaces, Attributes. DRAWING DEFENSE PERSONNEL SUPPORT CENTER (DPSC) 25072 - Wet Bulb Globe Temperature Kit. connection with specific proc

9、urement functions should be obtained from the procuring activity or as directed by the contracting officer) fication to the extent specified herein, Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposals shall apply (Copies of specifications, standard

10、s and drawing required by contractor in 2.2 Other publicatlons. The following documents form a part of this speci- AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM Designation E77-66 - Verification and Cali bration of Liquid-in-Glass Thermometers. (Application for copies should be addressed to

11、 American Society for Testing DEPARTMENT OF THE ARMY TECHNICAL BULLETIN and Materials, 1916 Race Street, Philadelphia, PA 19103). TB-MED-175 - The Etiology, Prevention, Diagnosis, and Treatment OP Adverse Effect of Heat. (For information purposes only). 2 Provided by IHSNot for ResaleNo reproduction

12、 or networking permitted without license from IHS-,-,-MIL-W-3b775A bb = 77777Ob 0337325 B a . a t 1 MIL-W-36775A (DLA-DM) 3. REQUIREMENTS 3.1 Materials and components. The materials and components shall be suit- able for the intended purposes and shall conform to the requirements of DPSC Drawing No.

13、 25072 and the associated Bill of Materials. 3.1.1 Thermometer graduations. All thermometers, within their specified ranges, shall be graduated in 1 degree F. subdivisions and numbered at least at every 1OOF. markings. When tested as specified, the accuracy of the ther- mometers used for black-globe

14、, dry bulb, and wet bulb temperature indication shall be f lOF. (see 4.4.1). 3.1.2 Slide rule calculations. When ,tested as specified, the WBGT s rule readings shall agree with table IV (see 4.4.2). i de 3.2 Design and constructlon. The kit shall consist of a thermometer assembly and a slide rule as

15、sembly that is contained in a portable case The kit shall be in strict accordance with DPSC Drawing for style, dimensions and constructton. In addition, identification marking per 3.6 shall be included on each kit. The kit shall weigh no more than 20 ounces. 3.2.1 Finish and color. 3.2.1.1 Hinged bo

16、x and cover. The hinged aluminum box and cover shall be treated according to P-C-436 prior to painting. The outside of the box and cover including the hinge shall be primed according to TT-P-1757 and shall be finished with two coats of baked lusterless enamel according to TT-E-527. The color shall b

17、e olive drab approximating Federal Standard 595 Color No. 34087. 3.2.1.2 Sunshade. The sunshade shall be treated and painted as specified in 3.2.1.1. The color shall be white. The lettering and markings on the sunshade chal 1 be black. 3.2.1.3 Sheath, radiant energy. The radiant energy sheath shall

18、be colored black using a flat lacquer which conforms to TT-L-50. 3.3 Performance. The wet bu1 b-globe temperature kit shall operate in accord- 3.4 Accessories. The following additional replacement parts shall be in- ance with the instructions included in 3.5. cluded with each kit. 1 each transparent

19、 perforated shield. 1 each water reservoir. 18 inch extra wick. The replacement parts shall be in accordance with DPSC Drawing No. 25072 and Bill of Materials and shall be contained in the case above the cushion mat. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

20、nse from IHS-,-,-MIL-W-36775A (DLA-DM) 3.5 Service data. data which specifically includes the following instructions and figure (i., see figure I), Each kit shall be furnished with two copies of service GENERAL INSTRUCTIONS WET BULB-GLOBE TEMPERATURE KIT NSN 6665-00-1 59-2218 A. The wet bulb-globe t

21、emperature kit is an instrument for providing information on hot weather risks to the health of troops undergoing training, The information is displayed on a scale In the form of an index, computed from the weighed readlngs obtained from three diferent thermometers, prevailing wind. black sheath ove

22、r the bulb. The sheath and bulb are inside a transparent perforated plastic shield. direct rays of the sun by a shield painted white. of the wet bulb (WB) temperature reading plus 20% of the black globe (BG) temperature reading plus 10% of the dry bulb (DB) temperature reading and can be computed as

23、 follows: 1. A stationary wet bulb (.WB) thermometer exposed to the sun and 2. A similarly exposed “black globe (BG) thermometer with a 3. A dry bulb (DB) thermometer with its bulb shielded from the B, The wet bulb-globe temperature index (WBGT index) is equal to 70% WBGT Index = 0.7 WB + 0.2 BG + 0

24、.1 DB Use of the attached slide rule provides the correct WBGT index automatically. ing guide 1 ines from TB-MED-175 are provided, planning exercise for unseasoned personnel o marching at standard kadence should be suspended for unseasoned personnel dur- ing their first three weeks of training. At t

25、his WBGT index, training activities may be continued on a reduced scale after the second week of training. index exceeds 85. C. To use the WBGT index as a control of physical activity, the follow- 1. When the WBGT index reaches 82, discretion should be used in 2, When the WBGT index reaches 85, stre

26、nuous exerGises such as 3, Outdoor classes in the sun should be avoided when the WBGT 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MLL-W-36775A Lab

27、 777790b 0337328 3 (.d) If you have performed the slide rule movement correctly, the index should read 90. E. CAUTION. After use, empty the water reservoir to prevent wetting or rusting of parts :in the kit, F. The kit contains in addition to the parts shown in figure 1, the fol 1 owing spare compon

28、ents : 1 each transparent perforated plastic shield. 1 each water reservoir. 3.6 Identification marking. The following identification marking shall be included on the outside of the case: Manufacturers name or registered trademark. Contract or purchase order number. National Stock Number (NSN) Item

29、Identi fi cati on . U.S. The identification marking shall be either stamped, printed, or engraved on the case or shall be in the fom of waterproof decal with permanent type ink, which is firmly and securely attached to the case. All marking shall be legible, 3.7 Workmanship. Workmanship shall be fir

30、st class throughout. The kit shall be free from defects which detract from its appearance or impair its serviceabi 1 i ty. all Joints cleaned, and exposed joints ground and finished smooth to blend with adjacent areas. and legible. 3.7.1 Welding. All welds shall be durable and sound in every detail,

31、 with 3.7.2 Thermometers, The graduation markings shall be complete, permanent 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract, the contractor is responsible for the performance of all inspection re- quirements Sncl uding the technical

32、requirements for the manufacturers part numbers specified herein. Except as otherwise specified in the contract, the contractor may use his own or any other facilities suitable for the performance of the inspectton requd rements specified herein, unless disapproved by the Government. The Government

33、reserves the right to perform any of the inspections set forth in the specification to assure supplies and services conform to prescri bed requi rements 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-36775A( DLA-DM) a c P 7 Provided by IHSNo

34、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-36775A (DLA-DM) 4.1.1 Records. Records of examinations and tests performed by or for the conhractor shall be mafntalned by the contractor and made available to the Government, upon the Governments request, at any

35、time, or from time to . time, during the performance Qf the contract and for a period of three years after delivery of the supplies to which such records relate. 4.1 2 Inspection. Inspection, as as both examination (such as visual, use Of special laboratory appliances nation by techntcal means of ph

36、ysica used in this specification, is defined or auditory, investigation without the or procedures) and testing (determi- and chemical properties) of the item. 4.1.3 Certificates of quality. C rtificates of quality, supplied by the manufacturer of the thermometers, may be furnished in lieu of actual

37、perfor- mance of such testing by the contractor, provided lot identity has been main- tained and can be demonstrated to the Government. The Certificates shall in- clude the name of the contractor, the contract number, the name of the manu- facturer or supplier, the NSN, the item identification, the

38、name of the cmponent/material, the lot number, the lot size, the sample size, the date of testing, the test method, individual test results, and the specification requirements . 4.2 Sampl ing. 4.2.1 Sampling for examination, Sampling for examination shall be conducted In accordance with MIL-STD-105

39、and table I. The unit of product for sampling purposes shall be the kit, TABLE I. Sampling for examination. Inspection level AQL (Percent defective) For visual examination Major defects II 1 .o Minor defects II 4.0 For dlmensional examination s- 1 2.5 4.2.2 Sampling for tests. Sampling for tests sha

40、ll be conducted in accord- ance with MIL-STD-105 and table II. The unit of product for sampling purposes shall be as indicated in the table, 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-36775A (DLA-DM) TABLE I. Sampling for tests, t 1 I I

41、Test I Inspec- I i Characteristic Requirement procedure tion level AQL Verification of: The mome ter Accuracy of 3.1.1 4.4.1 s-2 1 .o cal i bration cal i bration t S1 ide rule Accuracy of 3.1.2 4.4.2 * s-2 I I * Acceptance shall be zero regardless of lot size. 4.3.1 Classification of defects. Examin

42、ation shall be .conducted in accord- ance with the classlflcation of defects shown in table III. Examination shall not be restricted to the possible defects that are listed in the table. TABLE PIT, ClassificatSon of defects. Categories Major 1 o1 102 103 104 105 106 107 108 1 o9 110 111 Mi nor 201 2

43、02 203 Defects Kit not complete with all component parts. Components not free of damage, dents or deformation which renders Thermometers not capable of being secured within hol ders . Thermometer assembly not capable of being cammed or maintained Thermometer assembly not capable of being properly se

44、ated Any weld not sound or not free of being broken or cracked. Slide rule not free of warping or deformation, or not easily ad- Marking on slide rule not complete, permanent or legible. Case not capable of being properly opened, closed, or securely them unsui table for Intended use. in the raised p

45、osition. within the case. justable throughout the entire range. 1 atched. Finish on cylinder around “black globe“ thermometer not complete or not free of chipping. 1 egi bl e, Graduation markings on thermometers not complete, permanent , or Identification marking not complete, permanent, or legible.

46、 Finish on case or slide rule not free of chipped areas, Exposed surfaces of case not free of burrs or sharpness. scratches or roughness. . fied as a defect. 4.4 Tests. Tests shall be conducted to determine compliance w cation requirements. 9 Provided by IHSNot for ResaleNo reproduction or networkin

47、g permitted without license from IHS-,-,-4.3.2 Dlmensional examinatton, The kit shall be examined for defects in dimensions, Any dtmenston not within the tolerance specified shall be classified as a defect. 4.4 Tests, Tests shall be conducted to determine compliance with speci- fi cati on requi reme

48、n ts . 4.4.1 Verification of accuracy of thermometer calibration. Samples of each type thermometer shall be tested in accordance with ASTM Designation E77-66 for calbratlon, The themameters shall be tested at three temper- ature points, which are the end and middle points. 4.4.2 Accuracy of slide ru

49、le calculation. The slide rule shall be used to determine the WBGT based on data in table IV. The calculated WBGT shall be compared with the value indicated in table IV. TABLE IV. 1 O0 80 120 90 1 O0 48443 Packaging inspection. The inspection of the unit package, packing and marking for shipment and storage shall be in accordance with quality assurance provisions of the applicable container sp