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Corrections and Adjustments TCA 1800

Corrections and Adjustments TCA 1800. Errors Present in TCA. (l,t) Dual Axis Compensator Index Error (i) Vertical Index Error (c) Line of Sight Error (a) Tilting Axis Error (ATR) Target Recognition Axis Error. These Errors Can Change Over Time and With Temperature .

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Corrections and Adjustments TCA 1800

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  1. Corrections and AdjustmentsTCA 1800

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

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

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

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

  6. Dual Axis Compensator ErrorsPage 2 • Acclimatize the Instrument • Level the Instrument • Activate the Calibration Procedure • Select <CAL> from the Main Menu • Press <F1> (l, t) • Follow Prompts

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

  8. Vertical Index ErrorPage 2 • Activate the Calibration Procedure • Select <CAL> from the Main Menu • Select <F2> (i) • The Dual Axis Compensator is automatically turned off for the process • Follow the Prompts

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

  10. Horizontal Collimation ErrorPage 2 • Activate the Calibration Procedure • Select <CAL> from the Main Menu • Select <F3> (c) • The Dual Axis Compensator is automatically turned off for the process • Follow the Prompts

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

  12. Tilting Axis ErrorPage 2 • Activate the Calibration Procedure • Select <CAL> from the Main Menu • Select <F3> (a) • The Dual Axis Compensator is automatically turned off for the process • Follow the Prompts

  13. ATR Collimation Error To be discussed during the ATR Topic

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