From Historical Metrology Certificates to Today’s Quality Control: The DADI Approach
Understand historical metrology records, current product documentation and the manufacturing controls behind measurement quality.
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Featured knowledge
How is an electronic theodolite calibrated before shipment?
Follow the optical, mechanical and angular checks used to prepare an instrument for delivery.
Read the guideMORE TO EXPLORE
How does a theodolite measure angles?
Start with the relationship between optics, instrument rotation and electronic angle measurement.
Read articleOne platform. Different engineering directions.
Explore how DADI’s theodolite technology has developed into specialized measurement systems.
Read articleTHE ARTICLE LIBRARY
All DADI articles
16 articles
How Is an Electronic Theodolite Calibrated and Inspected Before Shipment?
Explore the optical, mechanical and angular checks DADI uses to prepare an electronic theodolite for shipment.
Read articleFrom Electronic Theodolites to Specialized Measurement Systems: How the DE2A Platform Continues to Evolve
Follow the development of the DE2A platform into laser instruments, autocollimation systems and specialized measurement applications.
Read articleWhy Are Electronic Theodolites Still Used Today? Applications in Surveying and Engineering
Where angle measurement, direction control and axis alignment continue to matter in modern surveying and engineering.
Read articleWhat Is a Compensator in a Total Station or Electronic Theodolite?
Learn how compensators correct small residual instrument tilt, and why proper mechanical leveling still comes first.
Read articleWhat Is Collimation Error (2C Error) in an Electronic Theodolite?
Understand collimation error, Face I and Face II observations, and the role of repeatable inspection in a 2C check.
Read articleHow Does an Electronic Theodolite Measure Angles?
From optical sighting and instrument rotation to encoder disks, electronic readings and angular accuracy.
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Technical Application Paper: Operational Outcomes and Strategic Conclusions of the 1,250-Meter Offshore Project
Chapter 4 of DADI’s Wanning subsea tunneling project series: reported outcomes and technical conclusions.
Read articleTechnical Application Paper: Core Deployment Architecture of Green Laser Systems in Ultra-Long Range Subsea Pipe Jacking
Chapter 3 of DADI’s project series examines the reported integration of a green laser reference into a tunneling guidance workflow.
Read articleTechnical Application Paper: Guidance Mechanics of Long-Range Green Laser Systems in Subsea Micro-Tunneling
Chapter 2 considers working distance, site conditions and the guidance framework described in DADI’s Wanning project account.
Read articleSubsea Tunneling Green Laser: DADI’s Wanning Pipe-Jacking Case
A manufacturer-reported case exploring long-range green laser direction references for pipe-jacking work in Wanning, Hainan.
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Inside DADI Factory – Part 4: How Prism and Reflectorless Measurement Paths Are Aligned
Part 4: how DADI checks the relative alignment of prism and reflectorless measurement paths during total station assembly.
Read articleInside DADI Factory – Part 3: How Horizontal and Vertical Axes Are Checked for Alignment
Part 3: observing mechanical-axis alignment and rotational stability before later optical and angular calibration.
Read articleInside DADI Factory – Part 2: How Absolute Encoder Disks Are Inspected for Angle Measurement
Part 2: inspecting optical surface condition and etched code definition before an encoder disk enters instrument assembly.
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Inside DADI Factory – Part 1: How Optical Lenses Are Cleaned Before Surveying Instrument Assembly
Part 1: the cleaning and visual inspection work that prepares optical components for surveying instrument assembly.
Read articlePipe Jacking Construction Cases in China: DADI Laser Guidance in Beijing, Chengdu and Suning
Explore DADI’s historical records of pipe-jacking applications in Beijing, Chengdu and Suning.
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EXPLORE BY TOPIC
Build your measurement knowledge
Measurement fundamentals
How does an electronic theodolite measure angles?
A practical introduction to electronic angle measurement and the instrument systems behind it.
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What does an instrument compensator do?
Understand the role of compensation in total stations and electronic theodolites.
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Understanding collimation error: the 2C error
Learn about a key angular error and why it matters when working with an electronic theodolite.
Read articleInstruments & quality
Calibration and inspection before shipment
An overview of DADI’s pre-shipment instrument checks.
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From theodolites to specialized measurement systems
How customer requirements shape the development of the DE2A technology platform.
Read articleWhy are electronic theodolites still used today?
Where angle measurement, axis alignment and direction control continue to matter.
Read articleENGINEERING IN PRACTICE
From measurement to the jobsite
Technical notes from DADI’s subsea tunneling project series.
Subsea pipe jacking: technical report
Read project noteGreen laser TBM system integration
Read project noteSubsea tunneling: technical conclusion
Read project noteLooking for a manual or datasheet?
Find product documents in Downloads, or contact our team with your instrument model.