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General| Type | Sound Level Meter |
|---|---|
| Interface | USB |
| Applicable standards | IEC 61672-1 Class 1 |
| Frequency weighting | A, C |
| Time weighting | Fast, Slow |
| Microphone | 1/2 inch electret condenser microphone |
| Frequency Range | 20 kHz |
| Display | LCD |
| Power | AA batteries |
Describes the current document, its features, connection, and use of peripheral equipment.
Introduces the Sound Level Meter NL-42/NL-52, its design, and capabilities.
Explains the unit's front view, operation keys, display, and other components.
Covers power supply, battery insertion, AC adapter connection, and initial setup.
Details procedures for internal electrical and external acoustic calibration.
Describes procedures for sound level and continuous sound level measurements.
Guides on storing, recalling, and managing measurement data.
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