Pentax Mastering Angle Measurements with the ETH-302 Model

Models: ETH-310 ETH-302 ETH-305

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5. Measurement

5.1 Horizontal angle measurement (right)

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

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

3Press [0SET] twice to set the horizontal angle to 0°,00’,00”

4Sight the second object using the horizontal clamp and tangent screw as well as the telescope clamp and tangent screw.

5Read the displayed value (α).

First Object: Zero Setting (0 °00’ 00”)

Second Object (34 °47’ 20”)

Horizontal Angle (α) = 34 °47’ 20”

First object

Second object

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