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Which of the following use of тАШHOLDтАЩ key in Total Station?
Feed Data of Temperature
To Fix Horizontal Angle
Feed Data of Pressure
To Fix Horizontal Distance
To Fix Horizontal Angle
In a Total Station, the 'HOLD' key is used to fix or lock the current horizontal angle reading displayed on the screen. This allows the surveyor to rotate the instrument and sight a new target while maintaining the set or measured horizontal angle.
In a Total Station, the 'HOLD' key is used to fix or lock the current horizontal angle reading displayed on the screen. This allows the surveyor to rotate the instrument and sight a new target while maintaining the set or measured horizontal angle.
╬╕heldтАЛ=Constant тАФ Horizontal angle value remains fixed during instrument rotation
When the 'HOLD' key is pressed, the internal electronic angle measuring system freezes the current horizontal circle reading. The surveyor can then orient the telescope toward a reference station or benchmark and press 'HOLD' again (or 'YES') to release the lock, setting that direction to the held angle value.
The 'HOLD' key specifically freezes the horizontal angle, not vertical angle or distance.
It is primarily used for angle setting, backsighting, and transferring horizontal angle references.
Prevents accidental loss of horizontal angle reference during sighting.
Simplifies backsighting and setting a specific horizontal direction.
If used incorrectly, it may cause orientation errors in traversing.
Backsight orientation during total station setup.
Setting out predetermined horizontal angles on construction sites.
Temperature and pressure data (Options A and C) are input manually or automatically to apply atmospheric corrections for Electronic Distance Measurement (EDM).
Horizontal distance (Option D) is computed using EDM measurements and vertical angle calculations, not fixed by the 'HOLD' key.
B is correct тАФ The 'HOLD' key in a Total Station is used to lock or fix the displayed horizontal angle reading.
Remember that 'HOLD' applies to Horizontal Angle (HA), while '0SET' sets the current Horizontal Angle to zero.