Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 459)

Miscellaneous Screens
R-451
Prism Type: This option allows you to choose one of the following
three types of prisms when using a supported Trimble total station:
• Generic: Select this option if using a generic (non-Trimble
360°) prism. It is up to the user to enter the correct prism
constant and manually angle the prism vertically toward the
total station before taking any shots to avoid introducing
error.
• Trimble 360° (2mm): Select this option when using a Trimble
360° prism. This selection will apply the appropriate vertical
angle correction constant for this prism to correct the error
that is introduced when taking a shot to the prism at an
extreme vertical angle. The icon is displayed to help the
user identify that the correct prism is selected and the Prism
Constant automatically defaults to 2 millimeters.
• Trimble MultiTrack (10mm): Select this option when using a
Trimble MultiTrack prism. The icon is displayed to help
the user identify that the correct prism is selected and the
Prism Constant automatically defaults to 10 millimeters. (See
note below.)
Note: When using a Trimble MultiTrack prism in passive mode
(active tracking turned off), it is important to leave the Use Target ID
box unchecked and if the active tracking is enabled, to leave Use
Target ID box checked since a different vertical correction is applied
for each case.
Use Target ID: When checked, the Target ID can be selected for the
Smart Target. (This option is only available when using a total
station and prism that supports target IDs.)
• Use For Search: When selected, the total station will check
the Target ID only when searching for the prism and then
track the prism. (Once the prism is being tracked, the total
station can potentially start tracking a different reflector that
comes into view.)
• Use Always: When selected, this forces the total station to
continuously check the Target ID; even while tracking the