YATO YT-73129, Manual

99

OPERATING INSTRUCTIONS

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urement mode are displayed in the telescope. The power supply is automatically switched o

ff

approx. 15 seconds after the last press of any button. 

Adjusting the eyepiece focus

Look through the eyepiece and keep turning its cover until the display is focused. Thanks to 

adjustable eyepiece focus, some people with myopia and hyperopia can use the range

fi

 nder 

without corrective glasses. 

Distance measurement

Press the change mode button until “M” or “Y” is displayed in the eyepiece. “M” is the measure-

ment in metres and “Y” is the measurement in yards. Aim the range

fi

 nder so that the measured 

object is inside a rectangle in the centre of the eyepiece. Press the on/o

ff

  switch brie

fl

 y and 

wait for the numerical reading of the distance. You can change the measuring unit by pressing 

and holding the change mode button until the symbol of the measuring unit changes in the 

eyepiece. 

Angle measurement

Press the change mode button until the angle measurement symbol is displayed in the eye-

piece. Measure in the same manner as when measuring the distance. The display in the eye-

piece will alternate between the distance and the inclination of the range

fi

 nder at the time of 

measurement. If the “-” sign is displayed before the angle value, this indicates the downward 

inclination of the range

fi

 nder.

Height measurement 

Press the change mode button until the height measurement symbol is displayed in the eye-

piece. Measure in the same manner as when measuring the distance. The display in the eye-

piece will alternate between the distance and height of the measured object relative to the 

height of the range

fi

 nder. If the “-” sign is displayed before the height value, this indicates the 

downward inclination of the range

fi

 nder.

Distance measurement in fog

Fog re

fl

 ects and absorbs the laser beam, so the measurement in fog can be highly erroneous 

and is e

ff

 ective only over short distances not exceeding 30 m. Press the change mode button 

until the distance measurement in fog symbol is displayed in the eyepiece. Measure in the 

same manner as when performing standard distance measurement. 

Speed measurement

The instrument is able to measure the speed of an object approaching or moving away from 

the range

fi

 nder. The greater the angle between the laser beam and the direction of the moving 

object, the greater the measurement error. The most accurate measurement results will be 

obtained when the laser beam coincides with the direction of the object movement. Press the 

change mode button until the speed measurement symbol is displayed in the eyepiece. Press 

and hold the on/o

ff

  switch to change the speed measurement unit. Press the on/o

ff

   switch 

brie

fl

 y to start measuring speed. Two distances and time between these measurements will 

be measured. Based on this, the average speed of the measured object will be calculated 

and displayed. 

Tripod-mounted device operation

The instrument can be mounted on a tripod, using a threaded socket in the instrument base.