Original Leica Single Reflector Prism Set GPR121 Prism GDF321 Tribrach and GZR103 Carrier Adaptor

Model: LSP1

Specification:

This Prism Set Includes:

1pc Leica GPR121 Prism

1pc Leica GDF321 Tribrach

1pc Leica GZR103 Tribrach Carrier

1pc Carry Case

What is the offset of a Leica prism?

Similarly, if you are working with a 0mm offset prism (or reflective tape), you will need to add 34mm. You get the idea. Remember, with a Leica instrument the Prism Constant Field is actually the correction you need to enter relative to -34mm, NOT the actual prism constant (offset) of your prism.

How to set prism constants on a Leica lift?

SETTING PRISM CONSTANTS ON A LEICA TOTAL STATION First a primer on Prism Constants (also called Prism Offsets), more correctly called Absolute Prism Constants (APC). Refer to Figure 1 to understand that an EDM needs to be “told” what prism you are using to correctly calculate the distance to the Vertical Axis of the prism.

Prism Target Set

Care of the Target Set

A. Cleaning.

1. Clean the plate level and circular bubble with lens paper. If necessary, moisten a cotton ball or swab with ether or pure alcohol. Never use liquids such as benzene, oil, or water

2. Wipe paintwork clean. If necessary, use a cloth dampened with water. Never use liquids such as benzene

3. Wipe a wet instrument carefully with a dry, lintfree cloth. Let the instrument dry completely before placing it back in the case. Never store a wet instrument in its case.

4. Keep the case clean, inside and out. Keep the inside dry. If water gets into the case, wipe it and leave it open to dry completely.

B. Storage and Transport.

1. The target set should not be stored inside the shipping case, remove the instrument from the case so that air can flow around it. This helps to prevent mildew and fungus in the case and instrument. Store the instrument in a low humidity, dust proof area.

2. The target set is shipped and transported in the foam rubber padded transportation cases.

C. Adjustments and Calibration.

1. Test the target set on a regular basis. Adjustments made to a theodolite are useless if the target sets are not properly adjusted.

2. Calibration and repairs for the target set will be conducted through the Survey Instrument Calibration Program (SICP).