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Corrections and Adjustments TCA 1800. Errors Present in TCA u (l,t) Dual Axis Compensator Index Error u (i) Vertical Index Error u (c) Line of Sight Error.

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Presentation on theme: "Corrections and Adjustments TCA 1800. Errors Present in TCA u (l,t) Dual Axis Compensator Index Error u (i) Vertical Index Error u (c) Line of Sight Error."— Presentation transcript:

1 Corrections and Adjustments TCA 1800

2 Errors Present in TCA u (l,t) Dual Axis Compensator Index Error u (i) Vertical Index Error u (c) Line of Sight Error u (a) Tilting Axis Error u (ATR) Target Recognition Axis Error

3 These Errors Can Change Over Time and With Temperature...

4 Therefore Should be Redetermined: u Before the First Use u Before Each Precision Survey u After Being Transported Over Long Distances u After Long Periods of Work u Change of Temperature > 20 degrees C

5 Dual Axis Compensator Errors u This Determines the Error in the Longitudinal (l) and Transverse (t) Compensators u If the instrument is to be Leveled without Turning the Alidade, this procedure must be conducted periodically

6 Dual Axis Compensator Errors Page 2 u Acclimatize the Instrument u Level the Instrument u Activate the Calibration Procedure u Select from the Main Menu u Press (l, t) u Follow Prompts

7 Vertical Index Error u Zero Point Error of the Vertical Circle in relation to the Vertical Axis u Setup and Level the Instrument u Setup a Target at about 100 m l Make sure that the target is within 9 degrees of the horizontal plane

8 Vertical Index Error Page 2 u Activate the Calibration Procedure u Select from the Main Menu u Select (i) u The Dual Axis Compensator is automatically turned off for the process u Follow the Prompts

9 Horizontal Collimation Error u This is the Error in the Line of Sight as it deviates from the line perpendicular to the Tilting Axis u Setup and Level the Instrument u Setup a Target at about 100 m l Make sure that the target is within 9 degrees of the horizontal plane

10 Horizontal Collimation Error Page 2 u Activate the Calibration Procedure u Select from the Main Menu u Select (c) u The Dual Axis Compensator is automatically turned off for the process u Follow the Prompts

11 Tilting Axis Error u Deviation of the Tilting Axis from the Perpendicular of the Vertical Axis u Setup a Target at about 100 m u The Target must be positioned at least 27 degrees above or below the horizon

12 Tilting Axis Error Page 2 u Activate the Calibration Procedure u Select from the Main Menu u Select (a) u The Dual Axis Compensator is automatically turned off for the process u Follow the Prompts

13 ATR Collimation Error To be discussed during the ATR Topic

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