Casella CEL-240 Manual de usuario

CEL-200 SERIES DIGITAL SOUND

LEVEL METERS

Go to Preface

HB3348-02

OPERATOR’S MANUAL

CASELLA

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PREFACE

Back to Cover

1. MANUAL CONVENTIONS

This section of the manual details the priority of Warnings, Cautions and Notes that

may apply throughout this manual.

2. INTRODUCTION

This section of the manual gives a brief overview of the equipment.

3. PREPARATION FOR USE

This section of the manual describes the first steps to using the CEL-200 Series

Digital Sound Level Meter.

4. GENERAL OPERATION

This section of the manual describes the basic operating procedures.

5. CALIBRATION

This section of the manual details the Calibration method.

6. INSTRUMENT SETTINGS

This section of the manual describes the how to use the Instrument Settings.

7. CONFIGURATION MENU

This section of the manual describes how to make changes to three specific settings.

8. TIME AND DATE (CEL-242/246 ONLY)

This screen displays the time and date.

9. MEMORY DELETION (CEL-242/246 ONLY)

This section details how to delete all loggings from the instrument memory.

10. SET TIME AND DATE (CEL-242/246 ONLY)

This section details how to set the time and date.

11. SWITCH OFF

This section of the manual describes the shut down procedure.

12. EQUIPMENT SPECIFICATION

This section of the manual gives the Specifications and Characteristics for the CEL-

200 Series Digital Sound Level Meter.

13. SERVICE AND WARRANTY

This section of the manual explains Casella’s after sales policy on the instruments

covered in this manual.

14. ENVIRONMENTAL CONSIDERATIONS

This section of the manual stipulates the environmental policies Casella have

committed to for the manufacture of instruments.

15. DECLARATION OF CONFORMITY

This section shows the declaration of conformity for the CEL-200 series instrument.

1. MANUAL CONVENTIONS

PRIORITY ONE

PERSONAL SAFETY.

When a WARNING is included in the text, the WARNING will always precede the text

it applies to.

WARNING: Indicates personal injury will result if proper precautions are not

followed.

PRIORITY TWO

EQUIPMENT PROTECTION.

A CAUTION will always precede the text it applies to.

CAUTION: Indicates equipment damage can result, if proper precautions are not

taken.

Note(s). Notes usually follow the text to which they apply. Notes can contain advice,

hints, extra information and explanations.

Back to Index

2. INTRODUCTION CEL-240, 242, 244 and CEL-246

Congratulations on your purchase of a CEL-200 Series Digital Sound Level Meter,

subsequently referred to as the ‘instrument’. The instrument has been designed to

perform accurate noise measurements through a wide range. It is a completely

digital sound level meter, designed for stable, reliable performance, fully compliant

with international sound level meter standards.

This instruction manual is to help you get the most benefit from your CEL-200

Series Digital Sound Level Meter and to ensure accurate noise measurements.

The CEL-200 Series range comprises of 4 models, the features are summarised in the table

below.

TheinstrumentisillustratedinFigure1.

Figure 1 CEL-200SeriesDigital SoundLevel Meter

1.Microphone. 2.PowerON/OFFkey. 3.Display. 4. Left Key. 5. Right Key.

6.USBPC Output. 7.Auxiliary socket (2.5mm Stereo).

BacktoIndex

3. PREPARATION FOR USE

PROCEDURE (Refer to Figure 2)

1. Open the Battery Cover.

2. Check the battery compartment is clean and dry.

3. Fit three new AA Alkaline (or NiMH) batteries according to the polarity in the

battery compartment.

4. Close the Battery Cover.

Notes:

If there is evidence of leakage from previously installed batteries, contact Casella

at the address given in Contact Details before using the instrument.

Caution:

Do not mix battery types.

Always fit new batteries when the battery indicator (A) shows battery strength is

low to prevent the instrument switching OFF while in use.

Figure 2 Preparations for Use

BacktoIndex

4. GENERAL OPERATION

1. Press and release the Power ON/OFF key to switch ON. During the software

initiation the screen will display the firmware version (e.g. V035-05 indicates issue

5 of the firmware) and the serial number (such as 0108121) followed by the Main

Measurement screen. (Refer to Figure 3).

Note: During power-up, CEL-242 and CEL-246 models will display time/date and

memory settings as described in Section 8. If you do not wish to alter these settings

on CEL-242/246 models do not press any keys and the instrument will proceed to the

main measurement shown below.

2. If the instrument requires calibration, refer to CALIBRATION for details.

3. Fit the windshield over the microphone before attempting any measurement.

CEL-240/242 CEL-244/246

A. –Battery Indicator. B. –Over Range Indicator. C. –Sound Pressure Level.

D. Analogue Display Bar. E. Measurement Scale. F. Maximum Sound Pressure Level.

G. Instrument Settings. H. Reset. I. Average Sound Pressure Level.

Figure 3 Main Measurement Screen

4. A Bargraph (Refer to Figure 4 [A]) or Time History (Refer to Figure 4 [B]) will be

displayed. Refer to INSTRUMENT SETTINGS to change the Time and

Frequency Weightings, or to change the type of display.

CEL-240/242 CEL-244/246

Figure 4 CEL-200 Series Bargraph and Time History Screens

5. The screen will display the instantaneous and maximum sound pressure levels

along with the relevant Time and Frequency Weighting. Refer to Instrument

Settings to change these settings. Additionally, CEL-244 and CEL-246

instruments will display the average level (Leq or Lavg) since the reset button

was pressed. To reset the maximum sound pressure level and average level,

press and release the key.

6. When the required measurements have been taken, press and hold the Power

ON/OFF key (Refer to Switch Off) for three seconds to switch the instrument

OFF.

Note: The ‘press and hold for three seconds’ feature prevents the CEL-200 Series

being accidentally switched OFF during use.

BacktoIndex 5. CALIBRATION

It is recommended that an acoustic calibration using a CEL-120/2 (or CEL-120/1)

calibrator be performed before and after taking measurements.

PROCEDURE

1. Switch ON the Acoustic Calibrator (Refer to the Calibrator Instruction Manual).

2. Check the Acoustic Calibrator has a 94dB (or 114dB) output.

3. Make sure the instrument is set to the 60-130dB range.

4. Fit the Acoustic Calibrator firmly over the microphone. The instrument

automatically detects a 1kHz tone from a 94 or 114dB Calibrator and enters

Calibration Mode (Refer to Figure 5).

Figure 5 Calibration Mode Screen

5. Press left key (A) to perform a calibration, or press the right key (B) to

Exit. When calibration is complete, the Calibration Complete screen will be

displayed (Refer to Figure 6).

Figure 6 Calibration Complete Screen

BacktoIndex

6. INSTRUMENT SETTINGS

1. The Instrument Settings can be changed from the Measurement screen (Refer to

Figure 7).

2. Press and release the Left key (A). An Arrow (X) will be displayed beside the

Settings key indicating the Settings Menu has been enabled. Note that the reset

symbol will be replaced by the relevant settings to be changed as described

below.

3. Press and release the Left key (A) repeatedly to cycle through the Settings

screens. Note that the screens displayed will be dependent on which CEL-200

series model purchased.

4. Press Right key (B) to make changes to each setting as described below in

sections A - G.

Figure 7 Instrument Settings

5. Current settings will be saved when the instrument is switched OFF. Note that if

no keys are pressed for approximately 5 seconds the CEL-200 Series will exit the

settings screen and return to the normal measurement screen. This will be

evident as the arrow (X) will not be beside the spanner symbol.

A. RECORDING DATA (CEL-242/246 ONLY)

On the CEL-242 and CEL-246 models the option to record (store) data to

the memory is available. This is the first option available when the settings

key is pressed. The symbol REC will be shown and when Right

key (B) is pressed data will be stored in the memory. The CEL-242 will

store 1 second sound pressure levels and the CEL-246 will store levels at a

selectable logging interval as described in section G below. The symbol

will then change to display the current run number e.g. 3 shows it is run

number 3. Pressing the (B) button again will stop the run and store the

results to memory. A maximum of 100 runs can be stored before memory

is full and dB24 software must be used to view the stored measurements. If

the memory is full this settings option will not appear. Please refer to

MEMORY AND TIME/DATE SETTINGS.

B. DISPLAY TYPE

The Main Display can be toggled between Bargraph and Time History

(Refer to Figure 4 (A) and (B) respectively) by pressing the (B) key.

TIME HISTORY –This setting displays how the maximum sound pressure

has varied over the last 1 minute or 5 minutes. e.

BARGRAPH –The Bargraph displays an analogue bar graph as

well as the sound pressure levels.

To toggle between these three options press and release the Right key (B).

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