Casella CEL-246/K1 Digital Logging Integrating Sound Level Meter Type 2 Kit User Manual

1. Introduction

This manual provides comprehensive instructions for the proper use, setup, operation, and maintenance of the Casella CEL-246/K1 Digital Logging Integrating Sound Level Meter Type 2 Kit. This device is designed for precise sound level measurements, incorporating Digital Signal Processing (DSP) technology for accurate and reliable data.

The CEL-246/K1 offers a wide measurement range, selectable frequency weightings (A and C), and time responses (Slow, Fast, Impulse). It features a non-decaying maximum hold function and a clear display showing current, highest, and average noise levels, along with a time history trend. Data logging capabilities are available via a USB output port.

2. What's Included

The Casella CEL-246/K1 Kit includes the following components:

• One (1) Casella CEL-246/K1 Sound Level Meter
• One (1) Acoustic Calibrator
• One (1) Foam Windscreen
• One (1) Carrying Case
• One (1) Calibration Certificate
• Three (3) AA Batteries

3. Setup

3.1 Battery Installation

1. Locate the battery compartment on the rear of the sound level meter.
2. Open the compartment cover.
3. Insert three (3) AA batteries, ensuring correct polarity (+/-).
4. Close the battery compartment cover securely.

3.2 Attaching the Foam Windscreen

Gently slide the foam windscreen over the microphone at the top of the sound level meter. This helps to reduce wind noise during outdoor measurements.

3.3 Initial Power On

Press the power button to turn on the device. The display will illuminate, showing the current measurement mode and readings.

An image showing the Casella CEL-246/K1 Digital Logging Integrating Sound Level Meter. The device is blue and grey, with a display screen showing measurement data and a graph. A black foam windscreen is attached to the top microphone.

4. Operating Instructions

4.1 Basic Operation

The CEL-246/K1 features simple two-button operation for ease of use. Refer to the on-screen prompts and the full user guide for detailed button functions.

4.2 Frequency Weighting

The meter supports two frequency weighting scales:

• A-Weighting: Attenuates lower frequencies to approximate the human ear's response, which is most sensitive between 3000 and 4000 Hz. Use for general noise measurements.
• C-Weighting: Reads all frequencies more uniformly, providing a better response to higher frequencies than A-weighting. Useful for pinpointing problems when A-weighted readings are very high.

4.3 Time Weighting

Selectable time responses include:

• Slow: Provides a slower response, suitable for measuring steady noise levels.
• Fast: Offers a quicker response, ideal for capturing fluctuating noise levels.
• Impulse: Designed for very short, sharp noise events.

4.4 Maximum Hold Feature

The non-decaying maximum hold feature captures and displays the highest sound pressure level detected until manually reset. This is useful for identifying peak noise events.

4.5 Data Logging and USB Output

The meter includes a USB output port for simple data logging. Connect the device to a PC to download stored data or for real-time data analysis using the optional software package. Data can be exported in spreadsheet format for further analysis.

4.6 Auto Calibration

The CEL-246/K1 supports auto calibration at a selected decibel level using the included acoustic calibrator. Refer to the full user guide for detailed calibration procedures to ensure measurement accuracy.

5. Maintenance

5.1 Cleaning

Wipe the meter's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the device.

5.2 Battery Replacement

Replace batteries when the low battery indicator appears on the display. Always use three (3) new AA batteries of the same type.

5.3 Storage

When not in use for extended periods, remove the batteries to prevent leakage. Store the meter in its carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.

5.4 Calibration

Regular calibration is crucial for maintaining measurement accuracy. Use the provided acoustic calibrator according to the instructions in Section 4.6 and the full user guide. It is recommended to calibrate the device before each critical measurement session.

6. Troubleshooting

6.1 Meter Not Powering On

• Check if the batteries are correctly inserted with proper polarity.
• Replace with fresh AA batteries.
• Ensure the power button is pressed firmly.

6.2 Inaccurate Readings

• Perform an auto calibration using the acoustic calibrator.
• Ensure the foam windscreen is properly attached to minimize wind noise.
• Verify that the correct frequency (A or C) and time weighting (Slow, Fast, Impulse) are selected for your measurement environment.
• Check for any physical damage to the microphone or device.

6.3 Data Logging Issues

• Ensure the USB cable is securely connected to both the meter and the PC.
• Verify that the necessary software drivers are installed on your PC.
• Consult the software manual for specific data transfer instructions.

7. Specifications

8. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or contact Casella customer service directly. Keep your purchase receipt as proof of purchase.

Manufacturer: Cole-Parmer