User's Manual

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height, you can apply this function.
Under the “Hotkey” interface, press the key [1] to enter the
“Input T.H” interface.
Input T.H
T.H：
m
1) After you input the target height , press [ENT] to save
the target height to the system parameters .when you enter
another interface which displays the target height ,the value will
be the system default until you change it;
2) The range of input is “-999.999” to “999.999” .if out of
range, it will prompt you;
3) Press [ESC] to come back to the “Hotkey” interface with
not saving the value of target height.
3.4.2 Settings of temperature and pressure
When measuring distance, the measured value can be
influenced by the atmosphere. In order to reduce the influence,
an atmospheric correction parameter (which is calculated by
current temperature and atmospheric pressure values) is needed.
The standard atmospheric value of this series Total Station
(i.e. the atmospheric conditions when the correction is zero)
Atm: 1013 Pa
Temp:20℃
The calculation of atmospheric correction
PPM= 277.825- 0.29434P/(1+0.003661T) (ppm)
In the formula:
PPM: correction coefficient (unit: ppm)