SHAHE Digital Angle Finder Protractor Ruler Digital Goniometer 400mm 225°with Horizontal And Vertical Level LCD Display Ruler

Button Function

ON/OFF/ZERO button: In the power-on state, short press has the function of reseting. Long press has the function of shutting down. In the shut-down state, short press has the function of turning on.

HOLD button: press shortly so as to lock and unlock.

MODE button: press shortly so as to switch between ° and ′.

Measurement method

Angle measurement:

1. Adjust the position of the main ruler and the auxiliary ruler to a measurement angle (any angle within the range of 0°~225°), press the “ON/OFF/ZERO” button short so as to reset the ruler.

2. Use the top surface of the main ruler and the bottom edge of the auxiliary ruler to measure another angle (0°-225°)

Horizontal and vertical measurement:

1. The measurement method of horizontal bubbles:

A. Place the bottom surface of the ruler tightly on the surface of the measured object. If the bubble in the horizontal bubble in the corresponding direction stays between the marks on the surface of the horizontal bubble, then the surface will be horizontal or vertical.