ARMY A-A-52299 B-2004 LEVELS SURVEYING LOCATOR'S HAND-TYPE《测水准仪 定位器 手动型》.pdf
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1、Comments, suggestions, or questions on this document should be addressed to: U.S. ARMY TOPOGRAPHIC ENGINEERING CENTER, ATTN: CEERD-TS-T, 7701 TELEGRAPH ROAD, ALEXANDRIA, VA 22315-3864 or emailed to pd-tetec.army.mil . Since contact information can change, you may want to verify the currency of this
2、address information using the ASSIST Online database at www.dodssp.daps.mil . FSC 6675 Distribution Statement A. Approved for public release; distribution is unlimited. INCH-POUND A-A-52299B 22 July 2004 SUPERSEDING A-A-52299A 29 August 1999 COMMERICAL ITEM DESCRIPTION LEVELS, SURVEYING: LOCATORS, H
3、AND-TYPE The General Services Administration has authorized the use of this Commercial Item Description (CID) for all federal agencies. The original issue of this CID replaced GG-L-261D. 1. SCOPE. 1.1 Abstract. This commercial item description covers hand held, surveying levels used for line of sigh
4、t determination of relative elevation. 2. CLASSIFICATION: 2.1 Type. The hand levels shall be of the following types as specified (see 6.2): Type I Non-telescoping. Type II Telescoping (draw tube). 3. SALIENT CHARACTERISTICS. 3.1 Construction. The hand level, regardless of type, shall have the follow
5、ing characteristics: a. A tubular body with an objective lens at one end and at the other, a removable eyepiece suitably sealed to preclude the entry of dust into the instrument. b. Horizontal and vertical cross hairs for use in determining the exact target intercept and vertical orientation of the
6、level. c. An integral focusing arrangement to accommodate the individual eye. d. A permanently mounted instrument level to indicate when the line of sight is horizontal. e. A mechanism that shall project the image or readout of the level indicator magnified 4x to one side of the field of view. f. A
7、lanyard to suspend the instrument from the users neck. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-A-A-52299B 23.2 Configuration. The levels shall be constructed in accordance with the following: a. Type I. The tubular body shall be non-telescoping
8、, with no magnification of the field of view. The overall length of the level shall not be greater than 6.5 inches. b. Type II. The tubular body shall telescope, to afford a 2X magnification of the field of view. With the telescoping portion fully retracted, the overall length of the level shall not
9、 be greater than 6.5 inches. 3.3 Level indicator. The instrument level indicator shall be accurate to within a 0.25 percent gradient from horizontal and shall maintain this accuracy in normal use, handling, and storage for the life of the instrument. 3.4 Carrying case. A carrying case, to fit and pr
10、otect the instrument, shall be provided with each level. The case shall have a securable closure and a loop(s) compatible with a belt 3.00 inches wide. The carrying case shall be fungus resistant. 4. REGULATORY REQUIREMENTS. 4.1 Recycled, recovered, or environmentally preferable materials. The offer
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