1、_. MIL-R-556LSB 66 W 7999906 OL11222 T 6 August 1984 MIL-R-55615A(EL) 18 July 1977 MILITARY SPECIFICATION RADIACMETER IM-174( )/PD This specification is approved for use by the Electronics Research and Development Command, Department of the Army and is available for use by all Departments and Agenci
2、es of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a portable survey meter that detects and measures gamma radiation, and is designated Radiacmetef IM-174( )/PD (see 6.5). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwi
3、se specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the- solicitation form a part of this specification to the extent specified herein. . SPECIFICATIONS MILIT A RY MIL-R-18
4、 - Battery, Dry. MIL-P- 1 16 MIL-P-11268 MIL-M-13 23 1 MIL-F-1407 2 MIL-E-55 58 5 - Preservation, Methods Of. - Parts, Materials, -4nd Processes Used In Electronic Equipment, - Marking Of Electronic Items. - Finishes For Ground Electronic Equipment, - Electronics Equipment And Parts, Packaging Of. S
5、TANDARDS MILITARY MIL-STD-105 - Sample Procedures And Tables For Inspection By Attributes. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army Electronics Research and Development
6、 Command, ATTN: DELCS-PE, Fort Monmouth, New Jersey 07703 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 6665 THIS DOCUMENT CONTAINS -ao . PAGES -. 7 Copyright Communications - Electronics Command Provi
7、ded by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-252 MIL-STD-454 MIL-STD-726 - Packaging Requirements Code, MIL-STO-810 - Environmental Test Methods. - Wired Equipment Classification of Visual - Standard General Requirements
8、 For Electronic And Mechanical Defects. Equipment. 2.12 Other Government documents. The following Government drawings form a part of this specification to the extent specified herein: DRAWINGS ELECTRONICS COMMAND DL-CM-6-537154 - Radiacmeter IM-174( )/PD DL-SM-B-537155 - Case, CY-2446( )/PD (Copies
9、of specifications, standards, and drawings required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer,) In the event of a conflict between the text of this specification and the references cit
10、ed herein, the text of this specification shall take precedence. 2.2 Order of precedence, 3, REQUIREMENTS 3.1 Description, The Radiacmeter IM-174( )/PD is a portable, unsaturated ionization chamber type survey meter operated from batteries contained within the instrument, The meter detects and measu
11、res gamma radiation. Radiation intensity is indicated on a pseudo-logarithmic scale, A spring loaded lever action switch provides facilities for zero setting in a radiation field and checking the circuit of the amplifier. 3.2 First article, The quantity of samples specified in the contract shall be
12、subjected to first article inspection (see 4.3 and 6.2bX 3,3 Material, In addition to the requirements of this specification, the requirements of MIL-P-11268, including the selection requirement therein shall apply, The material shall be as shown on the drawings and as specified herein. However, whe
13、n a definite material is not specified, a material shall be used which will enable the radiacmeter to meet the requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. 3.3.1 Recycled materia
14、l. It is encouraged that recycled material be used, when practical, provided it meets the requirement of this specification. 3.4 Qesiqn. The radiacmeter and case shall be in accordance with DL-SM-8-537154, DL-SM-B-537155f and as specified herein. 3,4.1 Ion chamber assembly. Y 2 I Copyright Communica
15、tions - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BA-30 (For use at or above -12OC (10OF) BA-3030 (For use below -12OC (10OF ) 3.4.1.1 Wall coatinq. The material used to form the conducting wall of th
16、e ionization chamber shall be graphite alcohol dag. The chamber wall shall be cleansed of parting compound prior to coating. The coating shall be opaque, and uniform with no flaking, peeling, or alligatoring. 3.4.1.2 Assemblaqe. The ionization chamber and the grease-filled compartment containing the
17、 high impedance circuitry shall be cast in a monolithic block of epoxy resin. A connector plug, Continental Connector Co. #8-20P or equal, shall be cast into the mor;iolithic block to provide for all external connections. Prior to final sealing, the assembly shall be placed in an enclosure capable o
18、f being evacuated and subjected to vacuum of at least 1.3 inches of mercury (in.Hg.) (4.4kPa) for 15 minutes and shall then be visually examined. No grease, sealant or other materials should be allowed to leak from one compartment to another within the assemblage. After assembly, the ionization cham
19、ber shall be a hermetically sealed unit. 3.4.2 Power supply. The radiacmeter shall operate from a battery power supply contained in a watertight compartment within the equipment. Unless otherwise specified (see 6.2cA batteries shall not be provided for shipment. 3.4.2.1 Compartment. The battery comp
20、artment shall not compromise the watertight seal to the interior of the radiacmeter. 3.4.2.2 Batteries. The power supply shall consist of batteries conforming to MIL-B- 18 as follows: 3.5 Operation. When tested as specified in 4.6.2 the radiacmeter shall demonstrate the following conditions: a. Cont
21、inuous operation for a period of one year, alternating 10 hours on and and two hours off, with no more than normal replacement of batteries. Aceptance of rist article samples will satisfy this requirement. b. Continuous operation at an ambient temperature between -18OC (OOF) and OC (32OF) for a peri
22、od of 72 hours in ambient background radiation. Battery replacement will not be permitted during this test. 3.6 Performance. 3.6.1 Calibration. All calibration checks shall be performed with a Cobalt 60 or Cesium 137 source which has been calibrated, standardized and certified by the National Bureau
23、 of Standards within 6 months prior to start of the preproduction tests. 3.6.2 Sensitivity and accuracy. The range of the radiacmeter shall be from 1 to 500 rads/hr. The radiacmeter shall indicate zero when located in a radiation field below 100 millirads/hr. The accuracy shall be +15 percent. 3.6.3
24、 Time constant. The radiacmeter after a 20 minute warm-up, shall indicate not less than 90 percent of its total response to a known applied radiation rate within 3 seconds after exposure. When the applied radiation rate is removed the radiacmeter shall indicate not more than 10 percentaof its total
25、response within 3 seconds after removal. 3 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-55615B(ER) 3.6,4 Air pressure sensitity. The radicmeter shall not deviate from its
26、 indicated dose rate at sea level (30.0 in.Hg. (10lkPa) when operated under reduced pressured of 20,58 in.HLg. (69,5kPah and subjected to 24 rads/hr - +40 percent for a period of 24 hours. 3,6.4.1 Modified air pressure sensitivity, Identical to that specified in 3.6.4 except that the duration shall
27、be 5 minutes in lieu of 24 hours. I 3.6.5 Drift and stability. 3.65.1 Drift. Short term stability shall be such that, after a warm-up period of 20 I I - minutes, readjustment to maintain accuracy of the radiacmeter to within +15 percent of true dose rate shall not be required during a continuous per
28、iod of not-less than 6 hours at any temperature between 1OOC (500F) and 27OC (81OFh I 3.6.5.2 Stability. When tested as specified in 4.6.3.4.2, the radiacmeter shall retain its calibration accuracy within 115 percent of the initial reading for a period of not less than 4 months, Batteries may-be rep
29、laced as required; battery replacement data must be recorded, No adjustment of the calibration potentiometer is permitted during the period of this test. 3.6.6 Warm-up, The radiacmeter shall respond, with an accuracy of - +20 percent of true dose rate, within 5 minutes after switching on the instrum
30、ent. The required calibration accuracy in accordance with 3.6.8 shall be obtainable within 20 minutes after the radiacmeter is switched on, 3.6.7 Energy dependence. The response of each radiacmeter shall be as uniform as possible when exposed to equal rad doses of X-ray and gamma radiation whose ene
31、rgies lie between 80 thousand electron volts (keV) and 3.0 million electron volts (MeV1 That is, when each radiacmeter is irradiated with equal rad doses of X or gamma rays of energies in its specified range, and the response of the radiacmeter to each of these doses is normalized to the response of
32、 the radiacmeter to the same dose of Cobalt 60 or Cesium 137 radiation, the normalized values shall be as close to unity as possible and shall in no case lie outside the range of 0,8 to 1.2 +20 percent. For energies lower than 80 keV, the response of each radiacmeter shall, I% far as is practicable,
33、 match that of the human body, and in all cases exhibit a continual decrease in sensitivity for equal doses of lower energy until the response diminishes to not more than 5 percent at 20 keV; (extrapolation down to 20 keV is acceptable, if it is a continuation of a natural curve and at least one poi
34、nt lies below 50 keVX 3,6,8 Calibration accuracy. The radiacmeter shall be calibrated at standard temperature, 230 +lOOC (730 +180Fh over its entire scale from a standardized Cobalt 60 or Cesium 137iource to wEhin c15 percent of true dose rate. Once calibrated, the accuracy of any scale reading shal
35、lbe within +15 percent of the true dose rate at any temperature between -320C (-25OF) and 330C. (t127OF) as measured with the instrument specified in 4,l.lb. 3.6,9 Indicator fall-off. When the radiacmeter is exposed to radiation intensities in excess of 500 rads/hr,it shall indicate at least a full
36、scale reading and at no time indicate a decreasing response as the dose rate is increased, 9.6.10 Compatibility. Each properly operating radiacmeter shall indicate 10 rads/hr - +15 percent and 100 rads/hr t15 per J inspection to be performed on all units. Inspection to be performed on all units. . -
37、 ; 3.7.la and : 4.6.6.1 I 3.7.2a i 3.7.la and 4.6.6.2 3.7.2a 1 3.7.6.1 : 4.6.6.8.1 I 3.7.6.2 j 4.6.6.0.2 i 3.7.1 and 4.6.6.4 i 3.7.2c I 3.7.lb and 14.6.6.3 i 3.7.2b 4.6.6.6 4.6.6.7 I 3.7.6.3 387.4 i 3.7.5 3.7.3 i 4.6.6.5 1 3.6.7 i 4.6.3.6 : 3.6.12 * . i 4.6.2 3.6.5.2 i 4.6.3.4.2 3.7.7 i 4.6.6.8.4 16
38、. Carrying case with strap : 3.14 12 ! ! :1 46.1 i Inspection to be performed on five 2 1 3 I I I 1 b2 I ! I 2 2 1 3 1 1 I r I _.I_ _LI - - 4 -.- - l/ The inspections 1 through 5, in the order shown, shall be performed on all first-article units I 2/ The numbers in the units columns in the table cov
39、ered by inspection item 7 specify the I 3/ The radiacmeter shall be thoroughly washed, cleaned, dried and refurbished after the salt before subjecting these units to any other inspection. order of inspections for the indicated units. fog and fungus tests before proceeding with subsequent inspection.
40、 a Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-55bLSB bb 77777Ob 0342236 7 9 4.4 Inspections covered by subsidiary documents. The following shall be inspected under the
41、applicable subsidiary documents as part of the inspection required by this specification, and the inspection requirement specified in the contract : Item - Finish Marking Workmanship Where reauired 3.1 1 3.12 3.14 4.5 Quality conformance inspection. The contractor shall perform the inspections speci
42、fied in 4.4, 4.5.1 through 4.5.3, 4.6.7 and 4.6.8. This does not relieve the contractor of his responsibility for performing any additional inspection which is necessary to control the quality of the product and to assure compliance with all specification requirements. 4.5.1 Each unit shall be inspe
43、cted for conformance to the inspections specified in table II. Discrete lots shall be formed from units that pass this inspection. Factors of lot composition not defined herein, or in the contract shall be in accordance with MIL-STD-105. Each lot shall be subject to sampling inspection, utilizing th
44、e procedures of MIL-STD-105, using the general inspection levels, and acceptable quality levels (AQLs) indicated in table II. 4.5.1.1 Order of inspection within group A. Group A inspection shall be performed in Group A inspection. an order satisfactory to the Government. TABLE II. Group A inspection
45、. . - _ .-! I ,- .-_- . . . . -. . - - . - . paragraph paragraph I : Requirement Test I Inspection I l i Visual and mechanical I Ionization chamber I Radiacmeter (complete assembly) 3.4; 1 (complete w/o carrying case) 3.14 Carrying case with strap 3.14 i Electrical I Calibration accuracy 3.6.8 Warm-
46、up . 3.6.6 Time constant 3.6.3 Potentiometer setting 3.6.11.1 . Microphonics 3.6.13 : Sensitivity and calibration 3.6.2 i- _ - - . - . - .I - i/ All electrical defects are major. 1 4.6.1 4.6.1 4.6.1 4.6.3.7 4.6.3.5 4.6.3.2 4.6.3.1 O 4.6.5 4.6.3.1 9 0.65 1 .o 1 .o i 1.5 for the group 1 ./ 1 _ I 2.5 I
47、 i 4.0 ! 4.0 i I - 11 I - -. _-. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-55bL5B bb 9999906 OLLl2237 O W Inspection Interchangeability Compatibility I Air pressure se
48、naitivity i Drift . Indicator fall-off 4 4.5,2 Group 8 inspection. Group B inspection shall normally be performed in insQection lots that have passed group A inspection and on samples selected from units that have been subjected to and met the group A inspection. This inspection shall conform to tab
49、le III and to the special inspection levels of table I of MIL-STD-105. Requirement Test method paragraph : paragraph . -*- 3,9 ! 4.6.8 3.6.10 I 4,6.3.9 3,6,4 4.6.3,3 3.6.5.1 4,6.3.4.1 3.6.9 4.6.3.8 -_ - 4,5.2.1 Group B sampling plans. The group B sampling plans, for the AQLs listed in table III shall be as follows: AQL - 2.5 percent 4 percent Inspection level s-3 s-4 4,5.2.2 Order of inspection within group B. Group B inspection shall be performed in an o
