Pentax ETH-302, ETH-310, ETH-305 instruction manual Leveling with the Plate level

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4.3 Leveling with the Plate level

After [4.2 Leveling with the circular vial] is completed, instrument must be leveled with plate vial.

1Place 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, position the bubble in the center of the vial (See A)

2Rotate the plate vial through 90°, position the bubble in the center of the vial by operating the remaining one leveling screw (See B)

3Confirm if the bubble stays in the center by rotating the instrument 180°.

If the bubble moves, repeat procedure 1 and 2 .

For the relationship between the screw adjusting direction and bubble moving direction, refer to the arrows of following figures. Bubble will move to the left in figure A, while in figure B moves upward.

When the bubble is not positioned in the center by repeating procedure

1and 2 in procedure 4.2 , adjustment is required. (Refer to [6.Inspection and Adjustment.])

Plate vial

(A)(B)

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Contents Electronic Theodolites Page Safety Precautions must be followed Distinctive DisplaysPage Contents Contents General PrecautionsBattery Storing and environmental conditionsInspection, Adjustment and Repair, Overhaul TransportationStandard Equipment OthersUnpacking and Storing Names of Parts Page Preparation of Power Confirm the correct work by pressing the power switchKey Operations and Display DisplayKeyboard Power ON/OFF key Function of each key2 V/% key Page Hold key 4 0SET key 5 R/L key Illumination keyRemaining battery indicator Automatic Power-off functionOther Functions Special key operations Page Setting of Vertical Angle Setting of 90buzzer Setting of correction of vertical angleSetting of angle measurement Setting of automatic power off function Setting of Angle unitSetting up the instrument Preparation for SurveyingLeveling with the Circular level Leveling with the Plate level Centering with the optical plummet Eyepiece adjustment Object sighting Measurement Horizontal angle measurement rightHorizontal angle measurement left Vertical angle measurement Perpendicularity of plate vial to vertical axis Inspection and AdjustmentInstructions on inspection and adjustment 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 Optional Accessories Diagonal Eyepiece SB14Angle Measurement SpecificationsTelescope Vertical Angle CompensationDimensions Power sourceWater resistant Ambient temperature Vertical axisPage Certified