Optics and optical instruments — Ancillary devices for geodetic instruments — Part 3: Tribrachs

ISO 12858-3:2005 specifies the most important requirements of tribrachs used in geodesy for the connection of the instrument's body with its base. The requirements in ISO 12858-3:2005, however, do not guarantee the full interchangeability of the instrument's body with tribrachs of different manufacturers, but give the detailed specifications of the clamp system to ensure the reliable mounting and clamping without prejudicing their performance and their usefulness. There are mainly two types of tribrachs in use, categorized in ISO 12858-3:2005 as Types W and Z. ISO 12858-3:2005 is applicable to tribrachs which are used for levels, theodolites, tacheometers, GPS equipment, EDM instruments and in combination with targets, reflectors, antennae etc.

Optique et instruments d'optique — Équipements annexes pour les instruments géodésiques — Partie 3: Embases

General Information

Status
Published
Publication Date
07-Feb-2005
Current Stage
9093 - International Standard confirmed
Completion Date
17-Nov-2020
Ref Project

Relations

Buy Standard

Standard
ISO 12858-3:2005 - Optics and optical instruments -- Ancillary devices for geodetic instruments
English language
11 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12858-3
First edition
2005-02-01

Optics and optical instruments —
Ancillary devices for geodetic
instruments —
Part 3:
Tribrachs
Optique et instruments d'optique — Équipements annexes pour les
instruments géodésiques —
Partie 3: Embases




Reference number
ISO 12858-3:2005(E)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 12858-3:2005(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2005 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 12858-3:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Type W tribrachs . 2
4.1 Nomenclature. 2
4.2 General features — Dimensions. 3
5 Type Z tribrachs . 6
5.1 Nomenclature. 6
5.2 General features — Dimensions. 7
6 Requirements. 9
6.1 General. 9
6.2 Connection between the tribrach and the tripod. 9
6.3 Torsional rigidity. 9
6.4 Foot screw. 10
6.5 Protection from corrosion. 10
6.6 Clamp knob or clamp screw . 10
6.6.1 Type W. 10
6.6.2 Type Z. 10
6.7 Circular level. 10
7 Designation and marking. 10
Annex A (informative) Recommendations for Type W tribrachs with improved stability. 11

© ISO 2005 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 12858-3:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12858-3 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 6,
Geodetic and surveying instruments.
ISO 12858 consists of the following parts, under the general title Optics and optical instruments — Ancillary
devices for geodetic instruments:
 Part 1: Invar levelling staffs
 Part 2: Tripods
 Part 3: Tribrachs
iv © ISO 2005 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 12858-3:2005(E)
Introduction
ISO 12858 consists of a series of parts which detail specifications for ancilliary devices to be used with
geodetic instruments in surveying. This third part specifies requirements for Tribrachs.
Additional parts, covering further ancillary devices, may be added to ISO 12858 as the need arises.
© ISO 2005 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 12858-3:2005(E)

Optics and optical instruments — Ancillary devices for geodetic
instruments —
Part 3:
Tribrachs
1 Scope
This part of ISO 12858 specifies the most important requirements of tribrachs used in geodesy for the
connection of the instrument's body with its base.
The requirements in this part of lSO 12858, however, do not guarantee the full interchangeability of the
instrument's body with tribrachs of different manufacturers, but give the detailed specifications of the clamp
system to ensure the reliable mounting and clamping without prejudicing their performance and their
usefulness. There are mainly two types of tribrach in use, categorized in this part of ISO 12858 as Types W
and Z.
This part of ISO 12858 is applicable to tribrachs which are used for levels, theodolites, tacheometers, GPS
equipment, EDM instruments and in combination with targets, reflectors, antennae etc.
2 Norma
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.