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IS 13611:1992 is the Indian Standard (BIS) for total station instruments. This standard provides a code of practice for the use of total station instruments in surveying. It details the instrument's components, classification, necessary field checks and adjustments, standard operational procedures for measurement, and guidelines for proper care, maintenance, and transportation.
Lays down general requirements and methods of test for total station instruments used in surveying and mapping.
Overview
Status
Current
Usage level
Frequently Used
Domain
Geotechnical — Surveying and Geotechnical Investigation
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always perform basic field checks (e.g., collimation, horizontal axis, compensator) at the start of a major project or if the instrument has been subjected to shock.
! Ensure the tripod is firmly set up on stable ground to minimize instrument settlement errors, which are a common source of inaccuracies.
! Atmospheric corrections for temperature and pressure are crucial for achieving high accuracy in Electronic Distance Measurement (EDM) over long distances.
ISO 17123-5:2018ISO (International Organization for Standardization), Switzerland
HighCurrent
Optics and optical instruments — Field procedures for testing geodetic and surveying instruments — Part 5: Total stations
Defines field procedures for determining and evaluating the precision of total stations and their ancillary equipment.
BS EN ISO 17123-5:2018BSI (British Standards Institution), United Kingdom
HighCurrent
Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Total stations
The UK's national adoption of the ISO standard, making it identical in technical content.
ISO 17123-3:2001ISO (International Organization for Standardization), Switzerland
MediumCurrent
Optics and optical instruments — Field procedures for testing geodetic and surveying instruments — Part 3: Theodolites
Covers the angle measurement testing component of a total station, which IS 13611 also details.
ISO 17123-4:2012ISO (International Organization for Standardization), Switzerland
MediumCurrent
Optics and optical instruments — Field procedures for testing geodetic and surveying instruments — Part 4: Electro-optical distance meters (EDMs)
Covers the distance measurement testing component of a total station, a key part of IS 13611.
Key Differences
≠IS 13611:1992 is based on early-generation total station technology and does not address modern features like reflectorless measurement, robotic operation, automatic target recognition (ATR), or integrated GNSS.
≠The ISO 17123 series employs rigorous statistical analysis, requiring the user to calculate the experimental standard deviation of measurements and compare it to manufacturer specifications, whereas IS 13611 focuses on procedural checks against pre-defined permissible error limits.
≠ISO 17123-5 provides distinct 'simplified' and 'full' test procedures for different levels of verification, a formal distinction not present in the single, comprehensive procedure of IS 13611.
≠IS 13611 is a single, monolithic code of practice, while the modern international approach is modular (ISO 17123 series), with separate parts for different instruments (levels, theodolites, total stations, GNSS).
Key Similarities
≈Both standards cover the same fundamental set of permanent adjustment checks for ensuring the geometric integrity of the instrument, including tests for the plate level, collimation error, and vertical circle index error.
≈Both IS 13611 and the relevant ISO standards mandate the application of atmospheric corrections (based on temperature and pressure) for all Electronic Distance Measurement (EDM) readings to achieve specified accuracy.
≈The core principles of proper instrument handling, such as secure tripod setup, precise centering and leveling over a point, and routine care and cleaning, are emphasized in both standards as prerequisites for accurate surveying.
≈Both codes of practice describe procedures for checking and adjusting the optical or laser plummet to ensure it is aligned with the instrument's vertical axis.
Parameter Comparison
Parameter
IS Value
International
Source
Test Acceptance Criteria
Pass/fail based on whether the measured error is within a specified tolerance (e.g., 'collimation error not to exceed 20"').
Statistical hypothesis test: The experimental standard deviation (s) is compared against the manufacturer's stated accuracy (σ) with a defined confidence level.
ISO 17123-5:2018
Horizontal Collimation Error
Prescribes a maximum permissible absolute error.
Defines a procedure to determine the standard deviation of horizontal angle measurements, which is then evaluated against the instrument's specification.
ISO 17123-5:2018
EDM Calibration Method
Recommends checking on a known baseline, with less formal structure.
Specifies a full test procedure using a multi-pillar baseline of known, calibrated lengths to determine both the additive constant (zero correction) and scale factor.
ISO 17123-4:2012
Vertical Index Error Check
Defines a maximum permissible error value for the vertical circle index.
Provides a procedure to determine the standard deviation of zenith/vertical angle measurements for comparison against manufacturer's specifications.
ISO 17123-5:2018
Documentation of Results
Focuses on recording observed values and noting that adjustments were made if errors were out of tolerance.
Requires a comprehensive report including the calculated experimental standard deviations, the statistical test results, and a statement of pass/fail against the manufacturer's specs.
ISO 17123-5:2018
Compensator Check
Describes a procedural check to ensure the compensator is functioning within its working range.
Specifies a test to determine the accuracy and working range of the automatic compensator, quantifying its performance.
ISO 17123-5:2018
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Typical angular accuracy range1 to 5 arc-seconds
Typical EDM accuracy formula±(2 mm + 2 ppm x D)
Typical plate level sensitivity20 to 40 arc-seconds / 2 mm
Typical optical plummet accuracy0.5 mm at 1.5 m instrument height
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
Clause 4 - Classification and Description
Clause 5 - Field Checks and Adjustments
Clause 6 - Operational Procedure
Clause 7 - Care, Maintenance and Transport
Frequently Asked Questions3
What are the essential field checks for a total station as per this code?+
Clause 5 recommends checks for the plate level, circular level, vertical and horizontal collimation, and the optical plummet.
What is the correct procedure for setting up the instrument?+
Clause 6.2 outlines the procedure for setting up the tripod, mounting the instrument, and then performing centering and levelling over a station point.
Does this code specify the accuracy required for a survey?+
No, this code describes the instrument's operational practice. The required survey accuracy is project-specific and should be defined in the project's technical specifications.