Casella CEL-450 Operator's Handbook Manual

Real-time sound level meters

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November 2005
CEL-450 & CEL-490
REAL-TIME
SOUND LEVEL METERS
Operators Handbook
HB3307-04

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Table of Contents
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Summarization of Contents

1. Introduction to CEL-450 and CEL-490 Sound Level Meters
1.1 Display & Keys Overview
Overview of the instrument's display elements and physical buttons.
1.2 Quick Edit Functionality
How to quickly change measurement parameters and settings on screen.
1.3 Microphone, Preamplifier, and Battery Installation
Instructions for physically connecting components and inserting batteries.
1.4 Switching the Instrument ON and OFF
Procedure for powering the sound level meter on and off.
1.5 Instrument Description
Detailed explanation of the CEL-450 and CEL-490 sound level meters.
1.6 CEL-450 Sound Level Meter Specifications
Features and capabilities specific to the CEL-450 model.
1.7 CEL-490 Sound Level Meter Specifications
Features and capabilities specific to the CEL-490 model.
1.8 Instrument Power Supplies
Information on battery and external power options for the instrument.
1.9 dB23 SoundTrack Software
Overview of software for data download, manipulation, and reporting.
2. Preliminary Operations
2.1 Select Instrument Configuration (Language, Microphone Response Etc.)
Setting language, microphone response, and other essential configurations.
3. Select Measurement Mode, Timer Settings, & Setup
3.1 Select Measurement Mode (Bandwidth)
Choosing the measurement bandwidth (Broadband, Octave, Third Octave).
3.2 Select Run Timing
Configuring timers for automatic or manual measurement start/stop.
3.3.1 Select Broadband Measurement Setup
Configuring parameters for broadband measurements.
3.3.2 Select Narrow Band Measurement Setup
Configuring parameters for narrow band measurements.
4. Acoustic Calibration Check
4.1 Start Acoustic Calibration Check
Recommends calibration before and after runs for accuracy.
4.2 Automatic Calibration Check of the Microphone
Step-by-step guide for performing an automatic microphone calibration.
4.3 Manual Calibration Check of the Microphone
Procedure for manually setting calibration levels when auto fails.
5. Operation
5.1 Measurement
Performing measurements after configuration and calibration.
5.1.1 Start Measurement
Steps to initiate a measurement run on the instrument.
5.1.2 Broadband Measurement
Detailed steps for conducting broadband sound level measurements.
5.1.3 Narrow Band Measurement
Detailed steps for conducting narrow band frequency analysis.
5.2 Recall Stored Data
How to access and inspect previously stored measurement data.
5.3 Delete Stored Data
Procedure for removing unwanted data to free up memory.
5.4 Format Memory
Global operation to erase all stored data and user setups.
5.5 Use With Tape and DAT Recorders (Including Calibration For Line Input)
Connecting and using the instrument with external recorders.
5.5.1 Recording
Guidelines for recording sound signals to tape or DAT recorders.
5.5.2 Replay
Guidelines for replaying recorded sound signals through the instrument.
6. Specification
6.1 General Specifications
Overall standards, ranges, and general technical parameters.
6.2 Measurement Functionality
Details on measurement capabilities and available functions.
6.2.1 CEL-450 Versions Functionality
Specific measurement functions available for the CEL-450.
6.2.2 CEL-490 Versions Functionality
Specific measurement functions available for the CEL-490.
7. Parts & Warranty
7.1 Schedule of Parts
List of components included with the CEL-450 and CEL-490.
7.2 Instrument Servicing & Warranty
Information on instrument servicing, warranty terms, and return procedures.

Table of Contents