4-1
4 DISTANCE MEASUREMENT
4
DISTANCE MEASUREMENT
CAUTION
•
When using the Laser-pointer function, be sure to turn OFF the output laser after distance
measurement is completed. Even if distance measurement is canceled, the Laser-pointer function
is still operating and the laser beam continues to be emitted.
•
Make sure that the target setting on the instrument matches the type of target used. GM
automatically adjusts the intensity of the laser beam and switches the distance measurement
display range to match the type of target used. If the target does not correspond to the target
settings, accurate measurement results cannot be obtained.
•
Accurate measurement results cannot be obtained if the objective lens is dirty. Dust it off with the
lens brush first, to remove minute particles. Then, after providing a little condensation by breathing
on the lens, wipe it off with the silicon cloth.
•
During reflectorless measurement, if an object obstructs the light beam used for measurement or
an object is positioned with a high reflective factor (metal or white surface) behind the target,
accurate measurement results may not be received.
•
Scintillation may affect the accuracy of distance measurement results.
Should this occur, repeat measurement several times and use the averaged value of the obtained
results.
Target type (Prism mode
/ Non-prism Mode (Reflectorless mode) / Sheet mode)
Measurement mode can be selected depending on the object to measure; Prism mode, Non-prism
mode (objects other than prism), and Sheet mode.
Regardless of whether the laser pointer is used, measurement is possible with both the Non-prism
mode, Sheet mode and the Prism mode. That is, when the GM is used in the open air, in an urban
area, etc., the laser pointer can be stopped and distance measurement then conducted, making it
possible to prevent the laser light from hitting a third party.
For measurement with a prism, be sure to measure with the Prism mode. If you measure with the
Non-prism mode and Sheet mode accuracy cannot be guaranteed.
Non-prism mode enable all distance measurements such Distance measurement, Coordinate
measurement, Offset measurement and Layout.
To switch over Prism mode to Non-prism mode or Sheet mode, press the
[NP/P]
soft key in each
measurement display.
When selecting Non-prism mode or Sheet mode, the icon on the right side of the screen indicates
the currently selected mode.
[
] : Non-prism mode
[
] : Sheet mode
Changing mode shall be done before measurement.
It is possible to set Non-prism mode for distance measurement during the power on time.
Refer
to 17 “SELECTING MODE” to set the option.
When collimating a near distance prism in Non-prism mode, measurement may not be performed
because of too much light.
N
P
Example
HR: 120°30'40"
HD* 65.432 m
N
P
VD: 12.345 m
MEAS MODE NP/P P1
↓
N: 120.456 m
E: 34.567 m
N
P
Z: 12.345 m
MEAS MODE NP/P P1
↓
Distance measurement mode
Coordinate measurement mode
Non-prism
mode
indicator
To change the mode, press the
[NP/P]
soft key in each measurement.
