STONEX R20 - EDM Settings

Stonex R20 – User Manual 61
9.4. EDM Settings
The EDM settings define the parameters related to Electronic Distance Meter, which can be set by the users
according to the actual measurement needs and the environment.
Any setting of the EDM parameters may have an effect on the actual distance measurement data and thus affect
the measurement results. Be careful when entering the parameters, and always check that the EDM settings are
appropriate before the measurement is taken to avoid unnecessary errors in the results.
1. In {Setting}press [4]〈4.EDM〉to enter {EDM Setting}. Press [★]
in the measurement related interfaces then select 〈2.EDM Set〉
also can enter {EDM Setting}.
2. Use [▲] [▼] to highlight a item then use [ ] [ ] to toggle the
options available.
3. Press [F3]【OK】to confirm the settings.
〈Refl.Type〉: Set the type of target on distance measuring.
• Prism : The target is reflector prism.
• Tape : The target is reflector tape.
• NonPrism : The target is object itself, i.e., reflectless.
〈EDM Mode〉: Set the mode of EDM working.
• Standard : Fine mode, default high precision mode.
• Fast : Fast mode with increased measurement speed but possibly slightly reduced accuracy.
• Track : Continuous measuring mode.
• Repeat : Repeat measuring until manually stop.
• Average : After measuring defined times on standard mode, average the results.
〈Constant〉: Input the prism constant when〈Refl.Type〉is Prism.
The unit is mm and input range from -999.9 to 999.9.
〈Pointer〉: To emit a laser beam coaxial to the telescope, creat a visible red spot on the near target to indicate
the current aiming point position: OFF/ON
[F1]【Atmos】: Enter {Atmospheric} to set the parameters related to
atmosphere.
〈PPM〉: Automatically calculated multiplying constant (mm/km, 10
-6
)
according on the parameters below.
〈Temp〉: The air temperature of measuring.
〈Pressure〉&〈Elev〉: The local air pressure and elevation. Two values
are linked, just set either one.
〈Refract〉: Atmospheric refractive index.
[F2]【PPM0】: Reset all parameters to default values:
20℃, 1013.25hPa, 0m, 0.13
Distance measurements are directly influenced by atmospheric conditions on the laser path. Atmospheric
corrections are required for precision distance measurements and involved into the VD/HD calculations.
Refer to Atmospheric Correction, Refraction and Earth Curvature Correction.