Pentax ETH-305, ETH-302, ETH-310 instruction manual Horizontal angle measurement left

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5.2 Horizontal angle measurement (left)

1Level the instrument, and after the power on set the vertical angle 0 point.

2Sight the first object using the horizontal clamp and tangent screw as well as screw as well as the telescope clamp and tangent screw.

3Press the [R/L] key to switch the horizontal angle display to counterclockwise reading (HL).

Subsequent operation will be done as in [5.1 Horizontal angle measurement (right), but the order of collimation is reversed.

To switch the mode back to ”right”, press the [R/L] key again.

•If the power turns off during the counterclockwise mode, the display returns to a clockwise horizontal angle display when power is turned on.

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Contents Electronic Theodolites Page Distinctive Displays Safety Precautions must be followedPage Contents Contents Storing and environmental conditions PrecautionsBattery GeneralTransportation 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 Inspection Inspection and AdjustmentInstructions on inspection and adjustment Perpendicularity of plate vial to vertical axisAdjustment 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 AccessoriesVertical Angle Compensation SpecificationsTelescope Angle MeasurementVertical axis Power sourceWater resistant Ambient temperature DimensionsPage Certified