... & 45 degree & 90 degree, the rest <= 0.1 degreeSuper large LCD screenBeeper at 0, 45, 90 degreeHolding functionDisplay remains upright to ... seconds, T”-1-“ icon is on the LCD, the unit is under the calibration state. Operate the following steps.Put the unit ... the absolute measuring mode, the angle is on LCD, calibration is finished.Note: after the calibration, it is in absolute measurement mode, the ...