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ISO 17123-2:2001, Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels | 
 enlarge | Author: Iso/tc 172/sc 6
Publisher: Multiple. Distributed through American National Standards Institute (ANSI)
Category: Book
Buy New: $89.00
Sales Rank: 3989890
Media: Paperback
Pages: 24
Shipping Weight (lbs): 0.2
Dimensions (in): 10.5 x 8.3 x 0.1
ASIN: B000XYSJ6K
Publication Date: August 23, 2007
Shipping: Eligible for Super Saver Shipping
Availability: Usually ships in 24 hours
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Product Description
This part of ISO 17123 specifies field procedures to be adopted when determining and evaluating the precision of levels (spirit levels, compensator levels, digital levels) and their ancillary equipment when used in building and surveying measurements. Primarily, these tests are intended to be field verifications of the suitability of a particular instrument for the immediate task at hand and to satisfy the requirements of other standards. They are not proposed as tests for acceptance or performance evaluations that are more comprehensive in nature.This International Standard can be thought of as one of the first steps in the process of evaluating the uncertainty of a measurement (more specifically a measurand). The uncertainty of a result of a measurement is dependent on a number of factors. These include among others: repeatability, reproducibility (between day repeatability) and a thorough assessment of all possible error sources, as prescribed by the ISO Guide to the expression of uncertainty in measurement (GUM).These field procedures have been developed specifically for in situ applications without the need for special ancillary equipment and are purposely designed to minimize atmospheric influences. This title may contain less than 24 pages of technical content.
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