Perform a "Backsight" measurement. This involves sighting a known point or setting an orientation angle (Azimuth) to establish the direction of the coordinate system. Measurement Modes: IR vs. RL
Periodically perform a "Check and Adjust" routine, which is an onboard program that guides you through calibrating the horizontal collimation and tilting axis inclination. If the instrument suffers a significant bump or drop, it should be sent to a certified Leica service center for professional calibration.
One of the standout features of the TCR805 is its Reflectorless (RL) capability. leica tcr805 total station user manual work
The TCR805 typically uses a serial connection (RS232) or a specialized Leica USB data cable. Using software like Leica Geo Office (LGO) or Leica Infinity, you can "Download" the job file. Common export formats include GSI, DXF, and CSV. Maintenance and Calibration
If you are setting up over a specific point, use the laser plummet to align the instrument exactly over the ground mark. Setting the Job and Station Perform a "Backsight" measurement
To switch between modes, use the "EDM Settings" menu. Always ensure the correct "Prism Constant" is entered when using reflectors to avoid systematic errors. Common Surveying Workflows
To maintain the TCR805’s accuracy, regular maintenance is required. Always store the instrument in its hard case when not in use. Avoid exposing it to extreme temperature fluctuations or moisture. RL Periodically perform a "Check and Adjust" routine,
Secure the TCR805 onto the tripod head using the centering screw.
Turn on the instrument and use the electronic level (digitized bubble) for fine leveling. Adjust the tribrach footscrews until the tilt error is within acceptable limits (usually less than 5 seconds).
Extend the tripod legs to a comfortable height and ensure the tripod head is roughly level.