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Long press button       under measuring mode and 

enter into continuous measuring mode. Maximum 

and Minimum value show on the LCD. 

Length Measurement & Calculation

Single Distance Measurement:

Turn on the laser beam by short press of the button      

       under measring mode; Press the button      

again for single measurement of length,then the 

measured results displayed in the major display 

area.

Continuous Measurement:

Present result displays in major display area. Short 

press botton       to exit continuous measuring 

mode.

Press button       ,        shows on the screen. One 

of the side of  rectangle blinking on the display, 

please follow the below instructions for area 

measuring:

Area Measurement:

Press       once for length

Press       again for width
The device calculates and shows the result in the 

major display area.
Press      , clear off the result and measuring again 

if necessary

Summary of Contents for DM-120

Page 1: ...User s Manual hand held laser distance meter...

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Page 3: ...body with the laser it is not allowed take the laser to shoot any objects surface with strong reflecting Due to electromagnetic radiation interference to other equipment and devices please don t use t...

Page 4: ...tery door Only 1 5 V AAA alkaline battery is applied to the meter If not used for a long time please take out the battery to avoid battery corrosion to meter body Battery Installation and Replacement...

Page 5: ...off the Instrument Under off status press button device and laser get starting simultaneously and stand by for measurement Under on status long press button for 3 seconds to turn the device off The d...

Page 6: ...n and then press release the button till CAL and a figure under it display on the screen User can adjust the figure with button and according to the accuracy of the meter Adjusting range 9 to 9mm leng...

Page 7: ...n the measured results displayed in the major display area Continuous Measurement Present result displays in major display area Short press botton to exit continuous measuring mode Press button shows...

Page 8: ...the length of one leg b Device calculates the length of another leg x Volume Measurement Press button twice to enter volume measurement mode A will shows on the top of screen Please follow the below...

Page 9: ...e length of one leg c Device calculates the length of the leg in full line x 3 Press three times till the one hypotenuse of blinking on the screen Press measure the length of one side a Press measure...

Page 10: ...ce can be used for length addition and subtraction Press shows in the major display area entering cumulation mode Value of last measurement and the result of cumulation will be showed on the screen Pr...

Page 11: ...king out mode User can get instructions by sound and icon Press a second number shows in the screen as below picture User can press or to adjust the time The max is 60s min is 3s Press to turn on the...

Page 12: ...lete the Record Tips You may get some warning information as below Info message Cause Solution Received signal is too weak Chose the surface with stronger reflectance Use the reflecting plate Received...

Page 13: ...ythagoras Measuring Length Area Volume Addition Subtraction MAX MIN Value Skating Out Delay Measurement Self Calibration Back Piece Bubble Laser Backlight class II Laser Type 620 680 nm 1 mW Record 10...

Page 14: ...l and dry place Please keep the device surface cleaning Wet soft cloth is applied to clean dust but erosion liquid is never allowed to use for the meter maintenance Laser output window and its focus l...

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