The 620 sound level meter features time history profiling, enabling operators to see how noise has varied over a set period ranging from one second to 30 minutes. The SLM also offers voice notes, allowing recordings to be taken at the start of a measurement run. The voice notes can be played back once the data has been downloaded to a PC. This feature allows for up to 33 hours of audio storage, and the device can store nearly 1,000 measurements up to 24 hours each, giving operators confidence that sufficient memory will be available without having to delete results on the go.
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