ISO 17123-3:2001

Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 3 : theodolites

This part of ISO 17123 specifies field procedures to be adopted when determining and evaluating the precision (repeatability)

of theodolites 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 part of ISO 17123 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 (precision), reproducibility (between day repeatability),

traceability (an unbroken chain to national standards) 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 purposefully designed to minimize atmospheric influences.

To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ