Pentax ETH-302 - Manuals

6 CONTENTS • 5. Measurement 34 5.1 Horizontal angle measurement (right) 5.2 Horizontal angle measurement (left) 5.3 Vertical angle measurement • 6. Inspection and Adjustment 37 6.1 Instructions on inspection and adjustment 6.2 Perpendicularity of plate vial to vertical axis 6.3 Perpendicularity of c...

7 1. General 1.1 Precautions Storing and environmental conditions• Do not use the instrument until it has adjusted to the ambient temperature. • Avoid using at a high or low temperature.The instrument may not work normally at temperatures exceeding –10 or +50˚C. • When the instrument gets wet,wipe o...

9 Others• When cleaning the case or the instrument, do not use any organic solvent. The surface of plastic parts may dissolve and deformation and discoloration can occur.Wipe off the dirt with a wet cloth of dilute household detergent • Wipe off dirt on the optics with a cleaning cloth (or paper) sp...

10 Unpacking and Storing Unpacking • Gently set down the carrying case so that its cover is upward. • Unlatch and open the case while pushing the latch lock. • Take the instrument out of the case. Storing • Set the telescope almost horizontal, and lightly tighten the telescope clamp screw. • Align t...

13 1.4 Preparation of Power • Remove battery box from the unit by pushing the release button on the top of the battery box. Remove the battery box cover. • Insert four AA batteries into the battery box according to (+) and (-). • Press the battery box to the leg by inserting the guide pin to the gui...

14 2. Key Operations and Display 2.1 Display Vertical angleV=Zenith 0°, V%=Slope( VH=Horizontal 0°, Vc=Compass) Horizontal angle Battery indicator:(HR=right rotation horizontal angle, HL=left rotation horizontal angle) 2.2 Keyboard [ V/%] key (Switches the display of vertical angle) [R/L] key (Set t...

15 2.3 Function of each key 2.3.1 Power [ON/OFF] key <Power ON and set the vertical angle 0 point>Pressing the ON/OFF key turns on the power supply and the message ”0 SET” is displayed. After the ”0 SET” of vertical angle is performed,the Horizontal and Vertical angle are displayed and the ins...

20 2.3.5 [R/L] key Press the [R/L] key to change from clockwise to counterclockwise rotation. A clockwise or counterclockwise reading is alternately displayed each time the key is pressed. Clockwise horizontal angle Count horizontal angle in a right rotation direction (HR) Counterclockwise horizonta...

21 2.4 Other Functions 2.4.1 Remaining battery indicator The status of the remaining battery capacity is displayed with ” ” symbolizing the battery capacity. Battery full - operating possibleOperation possibleOperation still possibleGet the battery ready for a stand byReplace batteries Automatic Pow...

22 3. Special key operations Special key operation enables selection of angle unit and other such items. Press [HOLD] key and [0SET ] key at the same time Press [ON/OFF] key Release [ON/OFF] key (No display or buzzer)Release [HOLD] key and [0SET ] key, Following display appears: 1 2 3 4 5

24 3.1 Setting of Vertical Angle Vertical angle setting display by special key operation Zenith 0° ( V )Setting is switched by pressing [0SET ] key Horizontal angle 0°( VH) Compass ( Vc) Store with [ V/%] key when the setting is decided.

3.2 Setting of 90°buzzer 90°buzzer setting display by special key operation No 90°buzzer Setting is switched by pressing [0SET ] keyWith 90°buzzer Store with [ V/%] key when the setting decided. 3.3 Setting of correction of vertical angle Correction of vertical angle setting display by special key o...

26 3.4 Setting of angle measurement Angle setting display by special key operation For models ETH-302/305 Setting is switched by pressing [0SET ] keyStore with [ V/%] key when the setting decided. For models ETH-310 Setting is switched by pressing [0SET ] keyStore with [ V/%] key when the setting de...

27 3.5 Setting of automatic power off function Automatic power off function setting display by special key operation Automatic power off active Setting is switched by pressing [0SET ] key Automatic power off inactive Store with [ V/%] key when the setting decided. 3.6 Setting of Angle unit Setting i...

28 4. Preparation for Surveying 4.1 Setting up the instrument Adjust the tripod legs so that a height suitable for surveying is obtained when the instrument is set on the tripod.A Set the tripod and fix the metal shoe firmly into the ground so that the tripod head is as level as possible and centere...

29 4.2 Leveling with the Circular level After [4.1 Setting up the instrument] is completed, instrument must beleveled using the circular vial. By rotating any two leveling screws, position the bubble in the center of the vial (See A.) ( To adjust the screws at the same time, turn them in opposite di...

30 4.3 Leveling with the Plate level After [4.2 Leveling with the circular vial] is completed, instrument must beleveled with plate vial. Place the plate vial in parallel with a line joining any two of the leveling screws. By rotating two leveling screws in the opposite direction of each other, posi...

31 4.4 Centering with the optical plummet After [4.3 Leveling with the plate vials] is completed, the instrument mustbe centered above the station point. Focus the optical plummet reticule by rotating the optical plummet eyepiece knob.Focus the station point by rotating the optical plummet focusing ...

32 4.5 Eyepiece adjustment After [4.4 Centering with the optical plummet] completed, focus the telescope eyepiece on the telescope reticule. Remove the telescope lens cap.Point the telescope at a bright object.Rotate the eyepiece completely counterclockwise.Look through the eyepiece, and rotate the ...

36 5.3 Vertical angle measurement Level the instrument, turn the power on and set the vertical angle 0 point.Sight the object A using the horizontal clamp and tangent screws as wellas the telescope clamp and tangent screws. Read the displayed value ( ). • The vertical angle mode can be changed to sl...

37 6. Inspection and Adjustment 6.1 Instructions on inspection and adjustment • Inspection and adjustment should be done after setting the instrument on a tripod or on an adjustment stand. • Inspection should be done sequentially from [6.2 Plate vial] to [6.5 Perpendicularity of line of sight to hor...

38 Adjustment Center the plate vial bubble.Rotate the instrument 180°, move the bubble half way back to the center by operating a leveling screw which is located parallel with the plate vial.Rotate the vial adjusting screw with the adjusting pin and position the bubble in the center.Repeat procedure...

39 6.3 Perpendicularity of circular vial to vertical axis Inspection Confirm if the bubble of the circular vial is in the center after the inspection and adjustment of [6.2 Plate vial].No adjustment is necessary if the bubble of the circular vial is in the center but if not, the following adjustment...

40 6.4 Inclination of reticule graduations Inspection Set an object point A on the line of sight through the telescope.Move point A to the edge of the field of view by adjusting the telescope tangent screw (point A’).No adjustment is necessary if point A moves along the vertical line of the reticule...

41 6.5 Perpendicularity of line of sight to horizontal axis Inspection Set an object (point A) at a distance of 30 to 50m away from the instrument and sight it through the telescope.Loosen the telescope clamp screw and reverse the telescope around the horizontal axis. Mark a point set on the line of...

42 6.6 Difference of the vertical angle Inspection Set the vertical angle in Zenith 0° modeSight an object (Point P) with the telescope and read the vertical angle ( V correct).Reverse the telescope and rotate the alidade.Sight point P again in the reverse position and read the vertical angle ( V re...

43 6.7 Optical plummet Inspection Place a piece of white paper, with a cross drawn on it, directly under the instrument.Look through the optical plummet, and move the paper so that the intersecting point of the cross comes to the center of the field of view.Adjust the leveling screws so that the cen...

44 7. Optional Accessories 7.1 Diagonal Eyepiece (SB14) The Diagonal eyepiece can be attached to the telescope for conveniencein observing the zenith or when in confined spaces. <Installation> Turn the telescope eyepiece ring counterclockwise to remove the eyepiece.Be sure to hold the eyepiece...