User's Manual

5.2
Trouble Shooting
The instrument cannot be turned on.
Please reinstall the battery, wait 5 seconds, then press the power button to turn on the instrument. If the instrument still cannot turn on
within 30 seconds, please check whether it is out of battery.
1)
The instrument's alarm is always on or never on.
Please check whether the alarm threshold value is set too high or too low.
2)
The instrument's alarm is on, but there is no sound.
Please check the volume of the instrument. Make sure that the alarm is on and the volume is set properly.
3)
The battery cannot be charged.
Please check whether all the components are connected well.
Please check whether the charging base has power.
Please check whether the battery is plugged into the charging base.
4)
The instrument is in good condition but there is no reading.
Please check whether the light intensity is too strong or too low.
When light intensity is too strong, please avoid complete perpendicular between the detecting laser beam and the object reflective surface.
5)
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