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General| Brand | Larson Davis |
|---|---|
| Model | Spartan 821 |
| Category | Measuring Instruments |
| Language | English |
Details the physical components and connections of the sound level meter.
Lists all items included in the meter's packaging for shipment.
Describes optional firmware and hardware accessories for the meter.
Instructions for connecting the preamplifier and microphone to the meter.
Covers powering the meter on/off, screen sleep, and battery status.
Explains acoustic calibration procedures and factory calibration scheduling.
Details the status bar, indicators, and navigation of the meter's display interface.
Information on using the meter's internal microSD card for data storage.
Guide on accessing and preparing the meter for SLM measurements.
Configuration options for measurement history, octave band analysis, and time history.
Customization of device name, passcode, LED status, auto-off, and language.
Configuration for frequency weight, detector, and exceedance triggers.
Options for setting calibrator level, system sensitivity, and microphone/preamp details.
Settings for storing data, timer modes (manual, timed, continuous).
Configuration for virtual dosimeters, modes, and exchange rates for noise exposure.
Configuration for capturing and calculating Ln statistical values for overall data.
Defines day/evening/night times and penalties for community noise assessment.
Allows labeling measurement data segments for event identification.
How to access and view saved measurement data files on the meter.
Best practices for using microSD cards, including formatting and backup.
Restricts access to meter settings and prevents unintentional changes during operation.
Provides details on meter hardware, software, firmware, and options.
Guidance on rebooting the meter to resolve system issues and errors.
Steps for reformatting the microSD card and restoring meter settings to resolve storage issues.
Instructions for downloading and installing the G4 LD Utility software.
Process for updating the meter's firmware and installed options.
Details compliance, physical dimensions, weight, and electrical interfaces.
Covers SLM performance, measurement properties, and system specifications.
Technical details for the electret microphone preamplifiers.
Information on OBA filter standards, description, measurement range, and linearity.
Data on XY and XZ plane frequency response and directional response tables.
Details on reference sound pressure level, level range, and microphone reference point.
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