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