Pentax ETH-305, ETH-302, ETH-310 Perpendicularity of line of sight to horizontal axis

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6.5 Perpendicularity of line of sight to horizontal axis

Inspection

1Set an object (point A) at a distance of 30 to 50m away from the instrument and sight it through the telescope.

2Loosen the telescope clamp screw and reverse the telescope around the horizontal axis. Mark a point set on the line of sight at about the same distance to the object point A, and call it point B.

3Loosen the horizontal clamp screw, and rotate the instrument around the vertical axis. Sight point A again.

4Loosen the telescope clamp screw, and reverse the telescope around the horizontal axis. Mark a point on the line of sight at about the same distance as point B, and call it point C.

5No adjustment is necessary if point B and C coincide, but if it does not - Consult with your dealer.

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Contents Electronic Theodolites Page Distinctive Displays Safety Precautions must be followedPage Contents Contents Battery PrecautionsGeneral Storing and environmental conditionsTransportation Inspection, Adjustment and Repair, OverhaulOthers Standard EquipmentUnpacking and Storing Names of Parts Page Confirm the correct work by pressing the power switch Preparation of PowerKeyboard Key Operations and DisplayDisplay Function of each key Power ON/OFF key2 V/% key Page Hold key 4 0SET key Illumination key 5 R/L keyOther Functions Remaining battery indicatorAutomatic Power-off function Special key operations Page Setting of Vertical Angle Setting of correction of vertical angle Setting of 90buzzerSetting of angle measurement Setting of Angle unit Setting of automatic power off functionPreparation for Surveying Setting up the instrumentLeveling with the Circular level Leveling with the Plate level Centering with the optical plummet Eyepiece adjustment Object sighting Horizontal angle measurement right MeasurementHorizontal angle measurement left Vertical angle measurement Instructions on inspection and adjustment Inspection and AdjustmentPerpendicularity of plate vial to vertical axis InspectionAdjustment Perpendicularity of circular vial to vertical axis Inclination of reticule graduations Perpendicularity of line of sight to horizontal axis Difference of the vertical angle Optical plummet Diagonal Eyepiece SB14 Optional AccessoriesTelescope SpecificationsAngle Measurement Vertical Angle CompensationWater resistant Ambient temperature Power sourceDimensions Vertical axisPage Certified