5
3. Auto range (30-130 dB) is not suitable for measuring transient
impact noise.
4. When you measure sound level outside, theanti-wind ball
should be installed on the microphone head to avoid blowing
directly into the microphone and generating airflow noise.
5. If “ ”symbol displays on the LCD, it means that the battery
voltage is too low. You should immediately replace batteries. It
is recommended that you use alkaline batteries.
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