Pentax ETH-302 Specifications, Telescope, Angle Measurement, Vertical Angle Compensation, Display

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8. Specifications

	Telescope
	Magnification	30 X
	Effective aperture	45 mm
	Resolving power	3”
	Field of view	1° 30’
	Minimum focus distance	1.35 m
	Stadia ratio	100
	Stadia constant	0

	Angle Measurement
	Type	Incremental rotary encoder
	Detection mode	V. angle:	Single
		H. angle:	Dual
	Minimum Display (Selectable)
	ETH-302 1”/5”
	ETH-305 1”/5”
	ETH-310 5”/10”
	ETH-320 10”/20”
	Accuracy (DIN18723, Standard deviation)
	ETH-302 2”
	ETH-305 5”
	ETH-310 10”
	ETH-320 20”

	Vertical Angle Compensation
	Method	Automatic compensation

	Stadia Ratio	100
	Stadia Constant	0

	Display
	Type	Dot matrix LCD/Two lines
	Display panel	Dual display

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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 PowerKey Operations and Display DisplayKeyboard Function of each key Power ON/OFF key2 V/% key Page Hold key 4 0SET key Illumination key 5 R/L keyRemaining battery indicator Automatic Power-off functionOther Functions 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