SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
2 –
Preparation
32
Setting the measurement mode
The FOCUS 2 Series total station has two measurement modes:
•
Prism mode (
Prism
) – See Measurement with a prism, page 32.
•
Reflectorless mode (
N-Prism
) – See Measurement in Reflectorless mode, page 32.
These modes can be changed at any time by holding down the
[MSR1]
or
[MSR2]
key for one second. For
more information, see 1 Sec Keys, page 128.
To set the measurement mode depending on the target you want to measure, see the following
table.
In some cases, you can measure another target that is not appropriate to the set measurement
mode.
Note –
The Focus 2 Series total station is Laser Class 3R in the Reflectorless mode and Laser pointer
function, and Laser Class 1 in the Prism mode.
C
CAUTION –
Do not sight the prism when the laser pointer is on.
Measurement with a prism
Do not use a prism that is damaged, dirty, scratched, or chipped.
As the FOCUS 2 Series total station is extremely sensitive, multiple reflections on the prism surface
can cause a loss in accuracy.
Measurement in Reflectorless mode
The distance the FOCUS 2 Series total station can measure depends on the strength of the reflected
signal from the target. Target reflectivity, condition, and color all affect the distance measured.
Surfaces that have low reflectivity may not yield a measurement.
Setting the prism constant
To do this, hold down
[MSR1]
or
[MSR2]
for one second. For more
information, see 1 Sec Keys, page 128.
Note –
If the prism constant is not 0 mm, then enter the prism
constant value directly into the Const field. For example, if the prism
constant is -30 mm, enter -30 mm into the Const field on the
instrument.
Target
Target setting
Prism, reflector sheet
Prism (Prism mode)
Other (reflective materials)
N-Prism (Reflectorless mode)
