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Short press button      , read the records by press 

button     and      . Short press      to delete recent 

record and long press      to clrear up all the records. 

Record Function

Long press button     for 3s to record your measuring 

result under measuring mode.It can also record the 

result under Area, Volume and Pythagoras mode. 

All the calculating records can be saved by the 

device.

Read / Delete 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 signal is 

too strong

Chose the surface with weaker  

reflectance. Use the reflecting plate.

Low battery voltage Change the power supply.

The working 

temperature is out 

of working range.

Use the device in the specified 

temperature. 

Pythagoras 

measuring error. 

Re-measure and ensure that 

Hypotenuse is bigger than 

Cathetus. 

Record damaged

Please contact the distributer.

Summary of Contents for DM-120

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

Page 2: ......

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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