1、,MIL-B-37275A 65 W 777770b 0265773 O m MILITARY SPECIF BATH, WATER, DENTAL IMPRESSION MA MI L- B-37295A 17 August 1978 SUPERSEDING MIL-B-37295 15 August 1975 CATION ERIAL, LOW TEMPERATURE This specification is approved for use by al and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This
2、 specification covers a low temperature, e thermostatically control led water bath sui table for tempering 2. APPLICABLE DOCUMENTS Departments ectrically hea dental materia 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bid or request for proposal f
3、orm a part of this specifi- cation to the extent specified herein. SPEC IF I CAT IONS FEDERAL PPP-B-636 - Boxes , Shi pping , Fi berboard, MILITARY MIL-M-7298 - Manual , Technical , Commercial Equipment. Beneficial comments (recommendations, additions, deletions) and any perti- nent data which may b
4、e of use in improving this document should be addressed to: Defense Personnel Support Center, Directorate of Medical Materiel , DPSC-ATT, 2800 South 20th Street, Philadelphia, PA 19101, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of t
5、his document or by letter. FSC 6520 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M I L - B- 37 295A . STANDARDS FEDERAL FED-STD-66 FED-STD-151 - Metals, Test Methods. - Steel , Chemical Composition and Hardenabi 1 i ty. MILITARY MIL-STD-105 MIL-ST
6、D-129 - Sampling Procedures and Tables for Inspection by - Marking for Shipment and Storage. Attributes. DRAWING , DEFENSE PERSONNEL SUPPORT CENTER (DPSC) 24376 Bath, Water, Dental (Copies of specifications, standards , and drawings required by contractors in connection with specific procurement fun
7、ctions should be obtained. from the .procuring .activity or as directed by the contracting officer. ) cation to the extent specified herein. effect on date of invitation for bid or request for proposal shall apply. 2.2 Other publications. The following documents form a part of this specifi- Unless o
8、therwise indicated, the issue in UNDERWRITERS LAQORATORIES, INC. (UL) Underwriters Laboratories , Inc Standards (Application for copies should be addressed to the Underwriters Laboratories, Inc., 207 East Ohio Street, Chicago, IL 60611, 333 Pfingsten Road, Northbrook, IL 60062, 1285 Walt Whitman Roa
9、d, Melville, LI, NY 11746, 1655 Scott Blvd., Santa Clara, CA 95050.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI 1 C73.11 . - Plugs andiReceptacles - General Purpose, 125 Volts, 15 Amperes, 2 Pole, 3 Wire, Grounding Type. (Application for copies should be addressed to the American National Standards
10、 Institute, 1430 Broadway, New York, NY 10018.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - . MIL-B-37295A 3. REQUIREMENTS 3.1 Fire and casualty hazards, 3.1.1 Prior to delivery, the contractor shall submit proof to the contracting agency th
11、at the equipment he will supply under this specification conforms to the applicable requirements of Underwriters Laboratories , Inc. (UL) Standards. The label or listing of the UL may be accepted as evidence that the equipment conforms to this requirement. 3.1.2 In lieu of the label or listing, the
12、contractor may submit in- dependent proof satisfactory to the contracting agency, prior to delivery, that his equipment conforms to UL Standards. does not absolve the contractor from complete compliance wih the require- ments of this specification in order to secure the acceptance of this commodity.
13、 specified herein. Materials not specifically designated shall be of high commercial quality throughout and shall be entirely suitable for the intended purpose. water bath and shall be capable of heating water to a thermostatically controlled temperature ranging from 90 to 160 degrees Fahrenheit (OF
14、). configuration and fit of all components shall eliminate any cracks and crevices in which materials might collect, and the bath shall be readily cleanable by conventional means. The water bath shall be suitable for operation on 115 volt, 60 hertz alternating current. The water bath shall be in com
15、pliance with Defense Personnel Support Center (DPSC) Drawing No. 24376. 3.1.3 . Compliance with UL requirements regarding fire and casualty hazards 3.2 Materials. Materials shall conform to the applicable requirements . 3.3 Design and construction. The water bath shall be a low temperature The 3.3.1
16、 Cabinet. The cabinet shall be a spot welded assembly of a frame stamping, a top stamping, and a ground clip, together with the necessary angles and weld nuts. The frame and top stampings shall be fabricated of no. 22 (.O31 inch) U.S. Standard Gauge 18-8 stainless steel sheets. The exterior of the c
17、abinet shall be finished in a no. 4 or brush finish. 3.3.2 Heating element. The-strip heater shall be attached in the well of the cabinet with screws and shall be spatially suspended by spacers. strip heater shall be rated at 211 watts plus or minus 10 percent at 115 volt, 60 hertz alternating curre
18、nt. The heater shall consist of nickel chromium alloy wire, imbedded in compressed refractory material and enclosed in a chrome steel housing. The 3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IMIL-B-37275A 65 M 7779706 02b577b b m. M I L - B- 3
19、7 2 9 5A 3.3.3 Main switch. The on-off switch shall be a four position, double pole, single throw, rotary switch with a 15 ampere, 125 volt alternating current rating and shall serve as a total disconnecting switch. An on-off switch knob shall be keyed to the switch and imprinted “ON-OFF-ON-OFF“ at
20、the four reciprocating positions of. the switch. 3.3.4 Thermostat. The thermostat shall be of the strut-type construction and shall be enclosed in a stainless steel case. The thermoswitch shall be mounted on the wall of the cabinet well and the adjusting stem shall protrude through an elongated hole
21、 in the front panel of the cabinet. The thermoswitch shall have a 10 ampere, 155 volt AC rating. 3.3.5 Dial. The dial may serve a multiple function as a temperature reference and as anidentification nameplate (see 3.7). thermoswitch stem and shall be mounted on the front panel of the cabinet. temper
22、ature numbers shall be printed at intervals of 2OoF or less starting at 1OOOF or less and ending at 16OoF or more. A thermoswitch knob shall be attached to the thermoswitch stem and shall be rotatably adjustable to the temperature selections. The dial shall be placed over the The 3.3.6 Pilot lights.
23、 The two pilot lamps shall be of the neon type with a nylon body and a red plstic lens. thermoswitch contacts are closed and activating the strip heater. lamp shall indicate continuously when the on-off switch is turned to “ON“. B&S Gauge aluminum sheet. The bottom panel shall be securely attached t
24、o the . cabinet. Each corner of the bottom panel shall have a securely attached leg with a polyethylene cap to properly contact the surface on which it is resting without wobble or other imbalance. One pilot lamp shall indicate only when the The other pilot The bottom panel shall be fabricated of no
25、. 16 (.O50 inch) 3.3.7 Bottom panel. 3.3.8 Thermal protection. A thermal cut-off device shall be provided as a built-in safety factor that shall effectively provide a current interruption in the event of a thermoswitch malfunction, The device shall be mounted to the iside of the bottom panel below t
26、he strip heater. opening the electrical circuit at a temperature of 200-220F at its position inside the bottom panel (see 3.4.4). type HSJ or HSJO, rubber jacketed heater cord, no less than 6 feet in usable length. A 3-prong vinyl plug shall be attached to one end and shall be suitable for use with
27、receptacles specified in American National Standards Institute (ANSI) Standard C73.11. The opposite end of the cord shall enter the underside of the unit through a nylon strain relief. stripped for attachment of terminals for connection to the on-off switch and to the ground clip. The device shall r
28、espond by 3.3.9 Electrical cord. The cord set shall be a 3-wire, no. 16 or 18 gauge, The cord shall be suitably slit back and 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-B-37295A 3.3.10 Basin. The rectangular basin shall be drawn fromone p
29、iece of No. 22 (.O31 inch1U.S. Standard Gauge AIS1 Type 304 stainless steel of FED-STD-66. The basin shall be furnished ,with a rolled bead on the top edge to provide a finger grip for removal. bottom for reinforcing and arl embossed water level line on one side, 9/16 + 1/16 inch from the top. The i
30、nteufior shall be satin finished and the exterior shall be finished by either electro-polish, bead blast, or any other method which shall impart a clean appearance not necesssarily devoid of draw marks. The basin shall be placed into the well of the cabinet and shall rest on the strip heater and bas
31、in support attached ta the bottom of the well. The basin shall be lightly forced forward and into mechanical contact with the thermoswitch by two pair of slots at the rearward part of the well. When the material between the slots is deformed, the spring action shall exert and maintain sufficient for
32、ce to hold the basin against the thermoswitch, inch in diameter. The thermometer shall be graduated from O to 22OoF, engraved in 2O divisions and numbered every 20 degrees. A rubber washer shall be placed over the thermometer to abut with the button top and a rubber tube shall be placed pro- tective
33、ly over the mercury bulb. , The thermometer shall be suspended in the loop of the thermometer holder which shall be rotatably adjustable in the attached 18-8 stainless steel holder support. The positioning of the thermometer in the holder shall allow for adequate immersion of the bulb in the properl
34、y filled basin. Th. basin shall contain a single embossed rib on its 3.3.11 Thermometer. The thermometer shall be 6 t 1/2 inches long and 1/4 2 1/32 3.3.12 Lifting platform. The lifting platform shll be fabricated of wire and shall be fmd to accept an open end cloth bag cover. Two cloth covers shall
35、 be furnished with each water bath. 3.4 Performance. 3.4.1 Dielectric strength. The water bath shall be capable of withstanding, without failure, the dielectric test specified in 4.5,2. 3.4.2 Temperature control. The thermoswitch knob shall be adjustable to com- pensate for differences between the d
36、ial and thermometer readings. shall maintain the stabilized temperature of the water bath within plus or minus 3OF, when tested to as specified-in - 4.5.3. components and the table top shall be as specified in table I, when tested as speci- fied in 4.5.5. The thermostat 3.4.3 Temperature of componen
37、ts and table top. The maximum temperature of the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-:MIL-B-37275A b5 m 9779906 0265978 T MIL-B-37295A TABLE I. Maximm temperature of components and table top. t I Locati on Maximum Temperature . (Degrees
38、 Fahrenheit) Table (below strip heater) 100 Bottom panel (center) 180 Front of Cabinet (center) 180 Top of Cbinet (at Basin) 180 Side of Cabinet (at wall) 180 Rear of Cabinet (at wall) 180 Thermoswi tch Knob 138 Pilot Lamp Wires 200 Wires at Strip Heater 300 On-Off Switch 200 Cord Set (inside at Str
39、ain Relief) 194 3.4.4 Thermal protection. The thermal cut-off chal 1 interrupt the electrical circuit at 210 - t lOOF, when tested as specified in 4.5.6. 3.5 Operational test. as specified in 4.5.4. 3.6 Service data. each of a technical manual which contains complete instructions for installation, o
40、peration, and maintenance and lists of component parts. The manual shall comply with the requirements of MIL-M-7298. contract or purchase order, the contractor shall furnish to the Contracting Officer two preliminary copies of his proposed technical manual for review and comment by the Directorate o
41、f Medical Materiel, Defense Personnel Support Center. The pre- 1 iminary manuals shall be submitted sufficiently early to permit adequate review by the Directorate of Medical Materiel, Defense Personnel Support Center (based on a maximum period of 30 days for such review) and to allow incorporation
42、by the contractor of any required revisions and corrections in the final manual without delaying delivery under the contract or purchase order. In addition, the Contract0 shall furnish 15 copies of the approved technical. manual to the Contracting Officer for distribution. Should the supplier have f
43、urnished acceptable manuals for the identical item within two years preceding the date of the contract and propose to furnish manuals identical with those previously accepted, then the requirements for review of drafts and submission of 15 additional copies may be waived upon request to the Contract
44、ing .Officer. Waiver of submission of drafts and submission of 15 additional copies shall be at the option of the Government. The water bath shall operate satisfactorily when tested The contractor shall furnish, with each.unit, two copies As soon as practicable after award of the 6 Provided by IHSNo
45、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-37295A 65 m 9777706 0265777 L m . MI L- B- 37 295A 3.7 Identification marking. Each water bath shall have a corrosion-resisting The The markings metal or pressure sensi tive tape nameplate permanently affixed ther
46、eto. plate shall bear the model or style designation, voltage, watts, frequency (op- tional), and the name or registered trademark-of the manufacturer. on the plate shall be permanent and legible. 3.8 Workmanship. Workmanship shall be first class throughout. All exposed sur- faces shall be smooth an
47、d free of sharp edges. Water baths shall be free from defects which detract from their appearance or impair their serviceability. Welds shall be clean and free from cracks and other imperfections. properly formed and tightened. The drawings forming a part of this specification are specifi- cation co
48、ntrol drawings. The supplier shall be responsible for preparing his own shop drawings. Where tolerances prescribed could cumulatively recul t in improper design, the supplier shall provide a product with dimensions within the tolerances prescribed on the drawing to insure proper design, function, fi
49、t, assembly, and operation of the item. No deviation from the prescribed dimensions or tolerances1 is permissible without prior approval of the contracting officer. Screws shall be 3.9 Drawings, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsib.ility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of- all inspection requirements may use his own or any other facilities suitable for the perf
