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EDM Settings allow to change the settings for the distance meter.
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From the Main menu, select Settings to modify your work settings.
The page can also be accessed from different application pressing EDM.
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Select EDM to set the EDM settings:
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EDM modes: changes the EDM mode.
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Single: instrument performs a single measure.
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Repeat: instrument repeats the measure,
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Tracking: instrument measures continuously the distance.
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3 times: instrument repeats the measure 3 times.
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4 times: instrument repeats the measure 4 times.
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5 times: instrument repeats the measure 5 times.
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Reflector: selects the prism type:
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Prism: the target is a prism.
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Sheet: the target is a sheet.
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No-prism: instrument measures in reflectorless mode.
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GeoMax Const: the GeoMax/Leica prism constant.
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Abs Const: the absolute prism constant.
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The prism constant is an important characteristic of the reflector.
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This constant, always given in [mm], is specific to the model and physically represents the constant difference between the measured value and the "exact" value.
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This difference will be cancelled during the measurements by entering an "additive constant" in the total station.
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There are two types of constants:
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Prism constant: for GeoMax/Leica prisms (usually in positive values).
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Absolute constant: for prisms of other manufacturers (usually in negative values).
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The additive constants, of non GeoMax/Leica prisms, are often given in the true zero prism system. Whereas the GeoMax/Leica prisms are given in the Hexagon TPS prism system.
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In order to switch from a system to another, we can use the following formula, that links these two constants:
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GeoMax/Leica prism constant = Absolute prism constante + 34.4mm
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Absolute prism constant = GeoMax/Leica prism constant – 34.4mm
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Old instrument firmware shows as field P.C. which refers to the absolute prism constant.