Being a high performance prism reflector, the Leica GRZ122 can be connected to the Leica SmartAntenna. Additionally, it can be used inverted directly on a survey point with a height of 78mm.
The overall 3D pointing accuracy that can be achieved with the Leica Leica GRZ122 360° Prism is 2mm.
|Height Offset:||86.0 mm|
|Absolute constant:||-11.30 mm|
|Leica constant:||+23.10 mm|
|Dimensions (W x H x D):||92.5x165x92.5 mm|
|Centring accuracy:||±2.0 mm|
|Mount:||12mm (Leica) Spigot|
- Whilst the height of this prism is 86mm from the mounting point, it can be used inverted directly on the survey mark by using the in-built pointer at the top of the prism.
- When using the GRZ122 this way, a height of 78mm must be used.
- The top of the Leica GRZ122 360° prism has a 5/8″ thread mount.
Leica GRZ122 360° Pro Prism FAQ
Below is a list of frequently asked questions about Leica GRZ122 360° Pro Prism.
What is the prism constant for the Leica GRZ122 360° Pro Prism?
The absolute prism constant (true value) for the Leica GRZ122 360° Pro Prism is -11.3mm. The prism constant as defined for Leica instruments for Leica GRZ122 360° Pro Prism is 23.1mm. For a more detailed explanation on prism constants please see this article.
Can I use the Leica GRZ122 360° Pro Prism with a Leica instrument?
Yes, you can use the prism with a Leica instrument as long as you set up the correct prism constant in the instrument settings.
What is the prism constant value that I need to use with a Leica instrument?
In order to use the Leica GRZ122 360° Pro Prism with a Leica instrument you should use 23.1mm as the prism constant value.
What is the height offset of the Leica GRZ122 360° Pro Prism?
The Leica GRZ122 360° Pro Prism height offset is 86.0mm. This is measured from the mounting point to the centre of the prism.