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General| Type | Sound Level Meter |
|---|---|
| Resolution | 0.1 dB |
| Operating Temperature | -10°C to +50°C |
| Data Logging | Yes |
| Interface | USB |
General safety advice, awareness of environmental risks, and proper PPE usage.
Guidelines for careful handling, avoiding shock, and safe battery installation and disposal.
Policy on user-serviceable parts, faults, and returning the instrument for repair.
Information regarding the disposal of the product according to WEEE directives.
Details on the different model variants (A/B) and accuracy classes (1/2).
Highlights of the instrument's capabilities like frequency weightings, time weightings, and connectivity.
Information on new functionalities introduced in the 2023 models, such as voice notes and GPS.
Explanation of the 1/1 octave band frequency analysis capabilities of 'B Models'.
Details on turning the instrument on, navigating screens using soft and cursor keys.
How to start and stop measurements using the Run/Stop key.
Explanation of the screen colour coding for identifying the operating system status.
Guidance on battery life, auto power off, and fitting AA alkaline or NiMH batteries.
Step-by-step instructions for installing AA batteries into the instrument.
How to record and skip voice notes during measurements.
Accessing instrument setup and configuration options via sub-menus.
Viewing and deleting stored measurement results.
Displaying instrument status like firmware version and battery voltage.
Information on selecting the reference sound pressure level (94 dB or 114 dB).
Specification of the instrument's single level range from 0 to 140 dB.
Definition of the microphone reference point for measurements.
Correction data for CEL-251 microphone frequency response under various conditions.
Details on the linear operating ranges for electrical input and microphone use.
Statement of product compliance with UK and EC directives and link to documentation.
Guidance on proper disposal of the product according to WEEE directives.
Details on instrument servicing, warranty, and Casella's in-house service department.
Contact information for obtaining technical support and assistance.
List of 620 series models, included accessories, and options for complete kits.
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