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e-survey ET2A User Manual

Electronic digital theodolite
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ET2A
Electronic Digital Theodolite
USER GUIDE

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  • Page 1 ET2A Electronic Digital Theodolite USER GUIDE...
  • Page 3 SHANGHAI ESURVEY GNSS CO., LTD. Copyright © Shanghai eSurvey GNSS Co., Ltd. 2022. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Shanghai eSurvey GNSS Co., Ltd. Trademarks and Permissions and other eSurvey trademarks are trademarks of Shanghai eSurvey GNSS Co., Ltd.
  • Page 4 SHANGHAI ESURVEY GNSS CO., LTD.

  • Page 5: Table Of Contents

    1.1.1 Warning ..........................4 1.1.2 1.1.3 Danger ............................5 Disclaimer ............................5 ET2A at a Glance ........................6 Quick Start ..........................9 Insert / Replace the Battery .......................10 Set up the Instrument .........................10 Level the Circular Level ......................12 Level the Plate Level ........................13 Collimate the Target ........................14...
  • Page 6 SHANGHAI ESURVEY GNSS CO., LTD. Angle Measurement ........................ 16 Measure a Horizontal Angle ......................16 Hold the Horizontal Angle ......................17 Show the Vertical Angle in Percentage ...................18 Measure the Horizontal Angle Several Times ................19 Measure the Zenith ........................20 Distance Measurement ......................21 Laser Measurement ........................
  • Page 7 SHANGHAI ESURVEY GNSS CO., LTD. Set the Beep ..........................33 Set the Angle Unit ........................34 Set the Date and Time .......................35 Check and Adjustment ......................36 Check and Adjust the Plate Level ....................36 Check and Adjust the Circular Level ..................37 Check and Adjust the Vertical Line of the Reticle ..............38 Check and Adjust the Line-of-Sight Error or Collimation Error ..........39 Check and Adjust the Vertical Index Error ................41 Check and Adjust the Coinciding of the Laser Spot and Target Center ......43...
  • Page 8 SHANGHAI ESURVEY GNSS CO., LTD.

  • Page 9: Before You Start

    SHANGHAI ESURVEY GNSS CO., LTD. Before You Start Before you start, please carefully read this part. Precautions for Safe Operation Precautions in this part are intended to minimize the risk of personal injury and/or damage to property, and all indicate ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Precautions can be divided into the following types according to the degree of loss or injury in case of negligence or omission: Indicates important paragraphs that must be adhered to in practice as they...

  • Page 10: 1.1.1 Caution

    SHANGHAI ESURVEY GNSS CO., LTD. 1.1.1 Caution The following outlines the cautions that you must avoid when operating the ET2A: For optimum usage, please regularly check and adjust the instrument (at least every three-month) especially after storage for a long time and transportation.
  • Page 11 SHANGHAI ESURVEY GNSS CO., LTD. When carrying the instrument, please tightly hold the handle. Please do not take out the battery when the instrument is on, and please replace the battery after powering off the instrument. Otherwise, the stored data may be lost.

  • Page 12: 1.1.2 Warning

    SHANGHAI ESURVEY GNSS CO., LTD. 1.1.2 Warning The following outlines the warnings that you must avoid when operating the ET2A: This instrument is only for qualified surveyor or professional users who have a good knowledge of surveying. To avoid permanent eye damage, please do not point the laser beam at other’s eyes, do not directly look into the laser beam source, do not stare at the laser beam, and do not look at the laser beam through a telescope or other devices.

  • Page 13: 1.1.3 Danger

    Disclaimer You are expected to follow all operating instructions and regularly check the performance of this instrument. It is your responsibility to exercise common sense while using the ET2A, and keep it operating safely. We assume no responsibility for any damage and loss of profits in the following conditions: ...

  • Page 14: Et2A At A Glance

    SHANGHAI ESURVEY GNSS CO., LTD. ET2A at a Glance...
  • Page 15 SHANGHAI ESURVEY GNSS CO., LTD. Keyboard Keys Meaning 0SET Set the horizontal angle to 0. Set the horizontal angle right or left. HOLD Hold the horizontal angle. Set the display unit of the vertical angle (° or %) by pressing 1 second and turn on or off the laser pointer by pressing 3 seconds.
  • Page 16 SHANGHAI ESURVEY GNSS CO., LTD. Display Characters Meaning 22-01-11 The current date (year-month-day). 13:33 The current time. The instrument will automatically power off within 30 minutes if no action is carried out. The vertical angle. The horizontal angle left. The horizontal angle right. The battery level.

  • Page 17: Quick Start

    SHANGHAI ESURVEY GNSS CO., LTD. Quick Start The process of quick start is as follows:...

  • Page 18: Insert / Replace The Battery

    SHANGHAI ESURVEY GNSS CO., LTD. Insert / Replace the Battery Battery Inserting / Replacing Battery Charging To insert / replace the battery, do the To charge the battery, do the following: following: 1. Insert the charger cable to the battery: 2.
  • Page 19 SHANGHAI ESURVEY GNSS CO., LTD. To set up the instrument, do the following: 1. Loosen the clamping screws on the tripod legs, and pull out to the required length to allow for a comfortable working posture. 2. Position the tripod over the marked ground point, centering it as best as possible, sufficiently press the tripod legs into the ground to guarantee a firm foothold, and tighten the clamps.

  • Page 20: Level The Circular Level

    SHANGHAI ESURVEY GNSS CO., LTD. Level the Circular Level It is used to do basic levelling-up with the circular level. To level the circular level, do the following: 1. Adjust foot screw A and B in the opposite direction until circular bubble perpendicular to a line shaped with foot screw A...

  • Page 21: Level The Plate Level

    SHANGHAI ESURVEY GNSS CO., LTD. Level the Plate Level The plate level can be used to precisely level up the instrument using the foot screws of the tribrach. To level the plate level, do the following: 1. Loosen the horizontal tangent screw, rotate the instrument and lock it until the plate level is parallel to a line shaped with foot screw A and B, and adjust foot screw A and B to make the...

  • Page 22: Collimate The Target

    SHANGHAI ESURVEY GNSS CO., LTD. Collimate the Target To collimate the target, do the following: 1. To clearly observe the reticle, point the telescope towards the light, turn the diopter ring and adjust the diopter. 2. Aim the target at the peak of the triangle mark of the optical sight, and allow a certain space between the optical sight and yourself for collimation.

  • Page 23: Power On The Instrument

    SHANGHAI ESURVEY GNSS CO., LTD. Power on the Instrument Before powering on the instrument, make sure the battery is full, replace and charge the battery if not. To power on the instrument, press Start Measurement See Angle Measurement for details.

  • Page 24: Angle Measurement

    SHANGHAI ESURVEY GNSS CO., LTD. Angle Measurement Measure a Horizontal Angle To measure a horizontal angle, do the following: 1. Enter angle measurement after powering on the instrument. 2. Aim at the first target A. 3. Press 0SET. 4. Press 0SET again to set the horizontal reading of target A as 0° 00'00". 5.

  • Page 25: Hold The Horizontal Angle

    SHANGHAI ESURVEY GNSS CO., LTD. Hold the Horizontal Angle To hold the horizontal angle, do the following: 1. Enter angle measurement after powering on the instrument. 2. Set the required horizontal angle, and press HOLD. 3. Press HOLD to hold the horizontal angle: 4.

  • Page 26: Show The Vertical Angle In Percentage

    SHANGHAI ESURVEY GNSS CO., LTD. Show the Vertical Angle in Percentage Before showing the vertical angle in percentage, make sure position 0 (vertical angle) is set as OFF (0° ). To show the vertical angle in percentage, do the following: 1.

  • Page 27: Measure The Horizontal Angle Several Times

    SHANGHAI ESURVEY GNSS CO., LTD. Measure the Horizontal Angle Several Times It is used to make sure the high accuracy of angle measurement through measuring the same angle at most nine times. When the limited number of times is reached, error information will show. To measure the horizontal angle several times, do the following: 1.

  • Page 28: Measure The Zenith

    SHANGHAI ESURVEY GNSS CO., LTD. 3. Aim at target A, and press 0SET to set the reading of A as 0°00’00”: 4. Aim at target B, and press HOLD. The horizontal angle shows: 5. Repeat step 3 and step 4 until the number of times for measuring the same horizontal angle has been finished.

  • Page 29: Distance Measurement

    SHANGHAI ESURVEY GNSS CO., LTD. Distance Measurement It is used to measure the horizontal distance between the instrument and the target point through the reticle in the telescope. Through the reticle (up / down / left / right) in the telescope to measure the distance between the target and the instrument.
  • Page 30 SHANGHAI ESURVEY GNSS CO., LTD. 4. Do one of the following: o If the zenith is 90° (the measurement ground is flat), calculate distance D following formula D = 100 * L: 100 refers to the stadia proportion constant of the instrument. o If zenith 90°...

  • Page 31: Laser Measurement

    SHANGHAI ESURVEY GNSS CO., LTD. Laser Measurement Please do not directly watch the laser with eyes when the laser pointer is on. Measure the Orientation It is to find out the other points on the line of the two known points. To measure the orientation, do the following: 1.

  • Page 32: Design The Target Angle

    SHANGHAI ESURVEY GNSS CO., LTD. Design the Target Angle It is to find the fiducial line with the designed horizontal angle, based on the line of two known points. To design the target angle, do the following: 1. Level up the instrument and power on the instrument. 2.

  • Page 33: Set The Level Line

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Level Line The red level line can be used as the level line. To set the level line, do the following: 1. Level up the instrument and power on the instrument. 2. To turn on the laser, press V/% for three seconds. The red level line is the level line. Configuration Menu With the configuration menu, you can achieve the following: ...

  • Page 34: Switch On/Off The Tilt Compensator Of The Vertical Angle

    SHANGHAI ESURVEY GNSS CO., LTD. Switch on/off the Tilt Compensator of the Vertical Angle The compensator normally remains switched on. If the instrument is used on an unstable base (e.g. shaking platform, ship, etc.) the compensator must be switched off, which can avoid the compensator drifting out of the measuring range and interrupting the measuring process by indicating an error.

  • Page 35: Define The Zenith

    SHANGHAI ESURVEY GNSS CO., LTD. 4. Press to confirm selection. Define the Zenith It is to define the zenith as 00° 00'00" or 90° 00'00".
  • Page 36 SHANGHAI ESURVEY GNSS CO., LTD. To define the zenith, do the following: → R/L to enter configuration mode: 1. Press 2. Press 0SET to turn to the following page: 3. Do one of the following: o To define the zenith as 90° 00'00", press R/L to change the value to ON. o To define the zenith as 00°...

  • Page 37: Set Automatic Power-Off

    SHANGHAI ESURVEY GNSS CO., LTD. Set Automatic Power-off Automatic power-off is to prevent unnecessary power consumption. With it activated, the instrument will automatically power off after 30 minutes if no action is carried out. To set automatic power-off, do the following: →...

  • Page 38: Set The Minimum Angle Reading

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Minimum Angle Reading You can select the displayed angle format in three steps (1", 5" or 10"): Step Degree sexagesimal 1" 0° 00' 01" 0.00.03 gon 5" 0° 00' 05" 0.00.15 gon 10" 0°...

  • Page 39: Set The Baud Rate

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Baud Rate To set the baud rate, do the following: → R/L to enter configuration mode: 1. Press 2. Press 0SET to turn to the following page: 3. Do one of the following: o To set the baud rate to 1200, press R/L to change the value to 1200.

  • Page 40: Set The Recording Medium

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Recording Medium To set the recording medium, do the following: → R/L to enter configuration mode: 1. Press 2. Press 0SET to turn to the following page: 3. Do one of the following: o To set the recording medium to serial port, press R/L to change the value to ON.

  • Page 41: Set The Beep

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Beep The beep is an acoustic signal at right angles (0° , 90° , 180° , 270° or 0 gon, 100 gon, 200 gon, 300 gon). To set the beep, do the following: →...

  • Page 42: Set The Angle Unit

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Angle Unit The setting of the angle unit can be changed at any time. And the actual values are converted according to the selected unit. To set the angle unit, do the following: →...

  • Page 43: Set The Date And Time

    SHANGHAI ESURVEY GNSS CO., LTD. Set the Date and Time To set the date and time, do the following: → R/L to enter configuration mode: 1. Press 2. Press 0SET → HOLD to enter date and time setup. 3. To switch among year, month, day, hour and minute, press HOLD. 4.

  • Page 44: Check And Adjustment

    SHANGHAI ESURVEY GNSS CO., LTD. Check and Adjustment Check and Adjust the Plate Level To check and adjust the plate level, do the following: 1. Level the plate level for precise leveling of the instrument. 2. Rotate the instrument 180° (200 gon), and observe if the bubble moves from the center: o If it does, proceed to step 3 - 5.

  • Page 45: Check And Adjust The Circular Level

    SHANGHAI ESURVEY GNSS CO., LTD. Check and Adjust the Circular Level To check and adjust the circular level, do the following: 1. Level the plate level for precise leveling of the instrument. 2. Observe if the bubble of the circular level is within the circle: o If it is, no adjustment is required.

  • Page 46: Check And Adjust The Vertical Line Of The Reticle

    SHANGHAI ESURVEY GNSS CO., LTD. Check and Adjust the Vertical Line of the Reticle If the vertical line of the telescope reticle is not perpendicular to the horizontal axis of the telescope, adjustment is required (because one point on the vertical line may be used to collimate the target for horizontal angle measurement or for vertical staking).

  • Page 47: Check And Adjust The Line-Of-Sight Error Or Collimation Error

    SHANGHAI ESURVEY GNSS CO., LTD. 6. Turn the eyepiece end until the vertical line of the reticle overlaps with point A: 7. Tighten the four screws fixing the eyepiece. 8. Repeat calibration until point A always moves along the vertical line of the reticle. After doing correction for the vertical line of the telescope reticle, check the collimation error and index error of the instrument.
  • Page 48 SHANGHAI ESURVEY GNSS CO., LTD. 2. Enter angle measurement after powering on the instrument. 3. Aim at the first target A, and press 0SET twice to set the horizontal reading of target A as 0° 00'00". 4. Aim at the second target B. The horizontal angle to target B shows (HA1). 5.

  • Page 49: Check And Adjust The Vertical Index Error

    SHANGHAI ESURVEY GNSS CO., LTD. Check and Adjust the Vertical Index Error The deviation between vertical circle zero position and horizontal direction is vertical index. It is necessary to concern this error when measuring vertical angle. Because of the close relationship between vertical index and compensator zero position, it is necessary to check and adjust compensator zero position when adjusting the vertical circle, to keep the value stable when reading.
  • Page 50 SHANGHAI ESURVEY GNSS CO., LTD. 8. Press to power on the instrument, and long press R/L when the following display shows: The following result shows: 9. Aim at the reticle of collimator or the obvious target at a distance, and press 0SET:...

  • Page 51: Check And Adjust The Coinciding Of The Laser Spot And Target Center

    SHANGHAI ESURVEY GNSS CO., LTD. 10. Rotate the instrument 180° . 11. Aim at the reticle of collimator or the obvious target at a distance, and press 0SET twice. 12. Repeat the whole process of checking and adjusting the vertical index error until the error is less than or equal to 10''.
  • Page 52 SHANGHAI ESURVEY GNSS CO., LTD. 3. Demount the handle, unscrew four slotted cheese head screws (M2X6) that fix the cover of the laser device, and remove the cover of the laser device: 4. To make the laser spot coincide with the target center, adjust the four adjusting screws:...
  • Page 54 To be the leading provider of high-precision professional, solution & service in the global geospatial industry Shanghai eSurvey GNSS Co., Ltd. Address: Building 4, No.651 Wanfang Rd, Pujiang Town, Minhang District, Shanghai, China E-mail: Sales: info@esurvey-gnss.com Support: support@esurvey-gnss.com Hotline: +86 400-999-8088 Website: https://esurvey-gnss.com/...

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