9 CHECK AND ADJUSTMENT

9.2 Checking the Optical Axis

To check if the optical axis of EDM and theodolite are matched, follow the procedure below. It is especially important to check after adjustment of the eyepiece reticle is carried out.

1)Position a prism about 30 to 50m apart from GTS-820A series.

2)After the power switch ON of GTS-820A series, collimate the center of the prism.

3)Press the soft key (Set audio) in the star key mode. Buzzer sounds continuously.

H direction confirmation (Do not move V direction).

4)Turn the horizontal jog counterclockwise slowly, move the collimating point to the left side of prism gradually until buzzer sound stops.

5)Turn the horizontal jog clockwise slowly, and move the collimating point to the prism center gradually until at the position buzzer starts.

Confirm the level of the signal (light quantity level) in display to adjust at the level of one to two as shown in below by turning the horizontal jog.

Quantity level one

Quantity level two

6)Press the [ESC] key and measure the horizontal angle, and note the horizontal angle displayed. Or you can do 0-set of horizontal angle.

7)Return to the Set Audio in star key again.

8)Turn the horizontal jog clockwise, move the collimating point to the right side of prism gradually until buzzer sound stops.

9)Move the collimating point to the center of prism gradually until buzzer sound starts.

Turning the horizontal jog to be one to two level of SIG value to adjust the collimating point same as

5)procedure.

10)Note horizontal angle same as 6) procedure.

11)Calculate the average value of 6) and 10). [Example]

6)•••••••••••• 0° 00’ 00”

10)•••••••••••• 0° 08’ 20”

___________________________

Average value

0° 04’ 10”

12)Climate to the center of prism. Compare the reading horizontal angle value and calculated value in 11). If the difference is within 1’30”, no problem for use.

9-2

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Topcon GTS-822A, GTS-825A, GTS-823A Checking the Optical Axis, Direction confirmation Do not move V direction
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GTS-822A, GTS-825A, GTS-821A, GTS-822A, GTS-823A, GTS-825A, GTS-823A specifications

Topcon's GTS series of total stations, including the GTS-821A, GTS-822A, GTS-823A, and GTS-825A, are known for their robust features and exceptional precision, catering to the needs of surveying and construction professionals. These instruments blend advanced technology with user-friendly interfaces to enhance productivity in the field.

The GTS-821A model is designed for reliability and accuracy. It offers a measurement range of up to 1,000 meters and delivers precision within ±2 millimeters, making it ideal for jobs requiring fine detail. Key features include a high-speed angle measurement system and a dual-axis compensator that ensures accuracy on uneven terrain.

In contrast, the GTS-822A model takes performance a step further by incorporating advanced optical technologies. It includes a high-performance EDM (Electronic Distance Measurement) that allows for faster measurements with a range extending up to 2,000 meters. This model also integrates a clear display and simple user interface, facilitating easier operation for users of all skill levels.

The GTS-823A represents a perfect blend of portability and advanced functionality. It is lightweight, making it easy to transport between job sites. This model incorporates GPS capabilities, allowing seamless integration with GNSS systems for enhanced positioning accuracy. Its onboard software supports various surveying methods, making it versatile for different applications.

The GTS-825A stands out for its advanced features tailored for high-precision tasks. This model supports wireless communication, enabling real-time data transfer to smartphones and tablets, which enhances collaboration in fieldworks. With an impressive measurement capability, it extends the measurement range and precision, meeting the demands of large-scale projects.

All models in this series share a durable design reputation, ensuring they withstand harsh environmental conditions. Their user-friendly interfaces are complemented by robust software support, providing surveying professionals with the tools they need to optimize their workflows.

In summary, Topcon’s GTS series, including the GTS-821A, GTS-822A, GTS-823A, and GTS-825A, represent the cutting edge of surveying technology, boasting features like extended measurement ranges, high precision, advanced EDM, and GPS integration. These instruments not only enhance productivity but also ensure that professionals can achieve their surveying goals efficiently and effectively. Whether for routine land surveys or complex construction projects, the Topcon GTS series delivers exceptional performance and reliability.
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