Chose the surface with stronger reflectance. Use the reflecting plate
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.
Model Number:SW-T40 Power Type:Battery-Powered Measurement Accuracy:+/-2MM Brand Name:SNDWAY Size:118*54*26.5mm Name:SNDWAY Model number:SW-T40 Power Type:Battery-Powered laser ruler:electronic measurement instruments Data Hold / Data clear function:yes Measurement unit options:mm/in/ft laser distance meter:laser ranger finder laser meter:Diastimater construction tools:laser tape measure Measure accuracy:+-2mm