Casella CEL CEL-480 User Manual

Preparation

DO NOT attempt to power from an external source
without first consulting Section 1.8 of the handbook.

Install 4 x AA size batteries in the compartment in the
underside of the unit.

Screw the Type 1 microphone finger-tight on to the
preamplifier.

Connect the Type 1 preamplifier plus microphone or the
Type 2 microphone/preamplifier assembly by inserting it
into the socket in the top of the instrument case with
the red dot facing the front to ensure correct pin location.

Menus & Control

All operations are based upon a series of menus
arranged as shown in the figure.

A combination of function keys and navigator keys on
the front panel are used to move around the menu
system and implement commands. The functions are as
follows.

Power on/off.
and Move the highlight around the options.
and Change the contents of a field.

MENU

DATA

Enable/Disable Quick Edit.

Display Main menu (may require several presses).

Accesses data screens.

On screen show active keys.

Shows that Quick Edit mode is available.

Menu options are implemented in two ways.

1. Leave the required option highlighted.

2. Use the quick edit function (press to activate)
to change the option.

Configuring the Instrument

The instrument configuration specifies how the
instrument communicates with the operator and via the
RS232 interface.

Press to switch the instrument on and obtain the
Calibration Check screen.

MENU

Press twice to see the Main menu which gives
access to further menus that select Measurement
Mode, Setup, Calibration, Data Recall from Memory and
Configuration.

A message such as 2/6 at the bottom of a screen
indicates that the second of six possible options is
highlighted.

Press to move to Configure.
Press to see the configuration menu.

Make choices about the RS232 Communication Baud
rate, Menu Language, Backlight operation and
Microphone Response (Free Field or Random) as
appropriate by leaving the required choice highlighted on
the screen.

The instrument Time and Date can also be set from the
Configuration menu.

Press (several times) to return to the Main menu.

Calibration

Calibration ensures that the instrument is measuring
noise accurately. The Calibration menu is displayed at
the end of the self test sequence.

If Scale is mentioned, move to the Main menu, select
Calibration, then press to see the Calibration menu.

Insert the 1/2" microphone far enough into the calibrator
cavity to be in contact with the shoulders in the cavity.

Insert the 1/4" microphone far enough into the coupler
cavity to be in contact with the shoulders in the cavity
and the microphone plus coupler far enough into the
calibrator cavity also to be in contact with the shoulders.

Avoid distorting the calibration volume by supporting the
calibrator and sound level meter on a horizontal surface.

Switch the calibrator on.

L

ZF

dB

Last Cal.
Ø9Jan98 12.22

01031

Depending on the microphone type and the response
set, the display should show one of these levels.

Microphone Response Calibration Level

1/2" Free Field 114.0 dB
1/2" Random 113.8 dB
1/4" Free Field & Random 113.6 dB

If it does not, press then use and to adjust
the display to the correct value.

Press to save the calibration.

Select Mode

The measurement mode specifies the bandwidth to be
used for measurement. With a CEL-480, the mode also
specifies how measurements will be timed.

Either select a measurement mode, or use a pre-stored
setup (see below).

Instruments with only broadband measurement have no
Mode option.

In the Main menu, move to Mode (if available) and press

to see the Mode menu.

Select a bandwidth for use by highlighting it.
On a CEL-480 press again to see a Timers menu for

the bandwidth that gives the option of switching the
Timers Off, setting a Duration Timer or setting a Delay
Timer.

Make choices as appropriate by leaving each one
highlighted on the screen.

Press (several times) to return to the Main menu.

Select Setup

The Setup specifies the particular parameters that are to
be measured.

In the Main menu, move to Setup and press to see
the Setup menu.

Select a setup for use by highlighting it.
When a setup is to be prepared and saved, press to

move to a setup options menu.
This allows the following measurement parameters to

be specified (when available).
Mode: Broadband,

Octaves,
Third-octaves.

The following broadband parameters can be specified
(when available).

SLM Response:

RMS-, time- and peak-weightings, plus
energy exchange rate Q.

Measured Functions:

Up to 14 parameters.

Dose Results:

Threshold, for including values in calculation
Normalisation period, allows results from
different durations to be compared.

Period Results (CEL-480 only):

Interval between measurements,
Intervals for up to 2 profiles.

The following narrowband parameters can be specified
(when available).

Measured Functions:

Up to 3 functions.

Frequency Scanning Mode:

Manual, the user judges when the level is stable,
Auto, the SLM determines when the level is
stable,
Timed, measurements are taken at user pre-set
intervals,

Repeat, on the CEL-480 auto and timed scans
can be repeated automatically at user pre-set
intervals.

Broadband Measurement

From any menu press several times until a broad-
band measurement screen is displayed.

L

AF

L

AFmx

LL

AFmn Zpk

30 100

Broadband measurement screens show one principal
and four secondary parameters that can all be changed
by the quick edit function.

Press and to change the range.
Press to start a measurement run and store results.

If a clock is shown, a timed measurement has been set,
refer to Section 3.1 of the Handbook.

Data stored during the current (or other) runs can be
reviewed while more data is being collected.

DATA

Press then use the navigator keys to review data
screens.

When sufficient data has been inspected, press to
return to the measurement screen.

When the run is to be stopped, press .
Three options are offered:

Stop run (and store data),
Restart run (abandon the current run and start a
new run),
Continue run (continue the interrupted run).

Select an option and confirm it by pressing .

dB

01010

Quick Edit is
available

MENU

L

Aeq

Cut Here

TOP

Cut Here

Preparation

DO NOT attempt to power from an external source
without first consulting Section 1.8 of the handbook.

Install 4 x AA size batteries in the compartment in the
underside of the unit.

Screw the Type 1 microphone finger-tight on to the
preamplifier.

Connect the Type 1 preamplifier plus microphone or the
Type 2 microphone/preamplifier assembly by inserting it
into the socket in the top of the instrument case with
the red dot facing the front to ensure correct pin location.

Menus & Control

All operations are based upon a series of menus
arranged as shown in the figure.

A combination of function keys and navigator keys on
the front panel are used to move around the menu
system and implement commands. The functions are as
follows.

Power on/off.
and Move the highlight around the options.
and Change the contents of a field.

MENU

DATA

Menu options are implemented in two ways.

1. Leave the required option highlighted.

2. Use the quick edit function (press to activate)

Configuring the Instrument

The instrument configuration specifies how the
instrument communicates with the operator and via the
RS232 interface.

Enable/Disable Quick Edit.

Display Main menu (may require several presses).

Accesses data screens.

On screen show active keys.

Shows that Quick Edit mode is available.

to change the option.

Fold as Shown

Press to switch the instrument on and obtain the
Calibration Check screen.

MENU

Press twice to see the Main menu which gives
access to further menus that select Measurement
Mode, Setup, Calibration, Data Recall from Memory and
Configuration.

A message such as 2/6 at the bottom of a screen
indicates that the second of six possible options is
highlighted.

Press to move to Configure.
Press to see the configuration menu.

Make choices about the RS232 Communication Baud
rate, Menu Language, Backlight operation and
Microphone Response (Free Field or Random) as
appropriate by leaving the required choice highlighted on
the screen.

The instrument Time and Date can also be set from the
Configuration menu.

Press (several times) to return to the Main menu.

Calibration

Calibration ensures that the instrument is measuring
noise accurately. The Calibration menu is displayed at
the end of the self test sequence.

If Scale is mentioned, move to the Main menu, select
Calibration, then press to see the Calibration menu.

Insert the 1/2" microphone far enough into the calibrator
cavity to be in contact with the shoulders in the cavity.

Insert the 1/4" microphone far enough into the coupler
cavity to be in contact with the shoulders in the cavity
and the microphone plus coupler far enough into the
calibrator cavity also to be in contact with the shoulders.

Avoid distorting the calibration volume by supporting the
calibrator and sound level meter on a horizontal surface.

Switch the calibrator on.

FIELD GUIDE TO CEL-440/480
Sound Level Meters

Protective

donot

)

grill(

remove

Type1, 1/2"
Microphone

Type2, 1/4"

&

Microphone

Preamplifier

Preamplifier

Reddot

Pullthe

Change

knurled

menu

sleeve

Enables

outwardsto

Quickedit

releasethe

connector

Backlight

ON/OFF

U
N

ME

Stop

Navigator

keys

(needs
toconfirm)

Start/

ATA
D

01009

Pause/
Restart

Access

data

L

ZF

dB

Last Cal.
Ø9Jan98 12.22

01031

Depending on the microphone type and the response
set, the display should show one of these levels.

Microphone Response Calibration Level

1/2" Free Field 114.0 dB
1/2" Random 113.8 dB
1/4" Free Field & Random 113.6 dB

If it does not, press then use and to adjust
the display to the correct value.

Press to save the calibration.

Select Mode

The measurement mode specifies the bandwidth to be
used for measurement. With a CEL-480, the mode also
specifies how measurements will be timed.

Either select a measurement mode, or use a pre-stored
setup (see below).

Instruments with only broadband measurement have no
Mode option.

In the Main menu, move to Mode (if available) and press

to see the Mode menu.

Select a bandwidth for use by highlighting it.
On a CEL-480 press again to see a Timers menu for

the bandwidth that gives the option of switching the
Timers Off, setting a Duration Timer or setting a Delay
Timer.

Make choices as appropriate by leaving each one
highlighted on the screen.

Press (several times) to return to the Main menu.

Fold LineFold Line

Print on A3

Select Setup

The Setup specifies the particular parameters that are to
be measured.

In the Main menu, move to Setup and press to see
the Setup menu.

Select a setup for use by highlighting it.
When a setup is to be prepared and saved, press to

move to a setup options menu.
This allows the following measurement parameters to

be specified (when available).
Mode: Broadband,

Octaves,
Third-octaves.

The following broadband parameters can be specified
(when available).

SLM Response:

RMS-, time- and peak-weightings, plus
energy exchange rate Q.

Measured Functions:

Up to 14 parameters.

Dose Results:

Threshold, for including values in calculation
Normalisation period, allows results from
different durations to be compared.

Period Results (CEL-480 only):

Interval between measurements,
Intervals for up to 2 profiles.

The following narrowband parameters can be specified
(when available).

Measured Functions:

Up to 3 functions.

Scanning Mode:

Manual, the user judges when the level is stable,
Auto, the SLM determines when the level is
stable,
Timed, measurements are taken at user pre-set
intervals,

Cut Here

Repeat, on the CEL-480 auto and timed scans
can be repeated automatically at user pre-set
intervals.

Broadband Measurement

From any menu press several times until a broad-
band measurement screen is displayed.

L

AF

L

AFmx

LL

AFmn Zpk

30 100

Broadband measurement screens show one principal
and four secondary parameters that can all be changed
by the quick edit function.

Press and to change the range.
Press to start a measurement run and store results.

If a clock is shown, a timed measurement has been set,
refer to Section 3.1 of the Handbook.

Data stored during the current (or other) runs can be
reviewed while more data is being collected.

DATA

Press then use the navigator keys to review data
screens.

When sufficient data has been inspected, press to
return to the measurement screen.

When the run is to be stopped, press .
Three options are offered:

Stop run (and store data),
Restart run (abandon the current run and start a
new run),
Continue run (continue the interrupted run).

Select an option and confirm it by pressing .

dB

01010

Quick Edit is
available

MENU

L

Aeq

Cut Here

RMS Weight

Narrowband Measurement

RMS Weight

From any menu press several times until a narrow-
band measurement screen is displayed.

L

Z

I

100

80

60

40

Narrowband measurement screens show a single
parameter and a frequency range. Both can be changed

Z 73.6

500

12532AZ

by the quick edit function enabled and disabled by .
Press to scan frequencies and store the

measurement results.

If a clock is shown, a timed measurement has been set,
refer to Section 3.1 of the Handbook.

When an auto-stabilised or timed scan is in use, the
instrument waits a short while with the highlight on the
lowest frequency, then steps through the frequency
bands.However, when a manual scan is in use, the

highlight will not move until is pressed to step to
the next frequency band.

Data stored during the current (or other) runs can be
reviewed while more data is being collected. Press

then use the navigator keys to review the data screens.
When sufficient data has been inspected, press to

return to the measurement screen.
When the run is to be stopped, press .

Three options are offered:

Stop run (and store data),
Restart run (abandon current run and start a
new run),
Continue run (continue interrupted run).

Select an option and confirm it by pressing .

dB

8k

2k

01011

DATA

MENU

Indicated Parameters

F: Fast
S: Slow

I

: Impulse
pk: Peak
mx: Maximum
mn: Minimum
eq: Equivalent Level
av: Average
Tm3: Taktmaxim al 3 sek
Tm5: Taktmaxim al 5 sek
EP,d: 8 hr Exposure
EP,v: Projected Exposure
N: Noise Percentile
AE: Sound Exposure
TWA: 8 hr Time Wtd Av
TWAv:Projected TWA

Casella CEL

Regent House, Wolseley Road,
Kempston, Bedford,
MK42 7JY, United Kingdom.
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.casellagroup.com

Casella USA

17 Old Nashua Road #15
Amherst, NH 03031, U.S.A
Toll Free: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.casellaUSA.com

CEL48ØA.1 vNN.NN

Type 1

Preamp

None

I/O

16/1Ø

Tes t

NNNNNN

ID:

13Jan98 1Ø:54:42
512Kb

Memory
Full

1%

Runs

2
Format

Setup
User Setup 1
Press MENU
Key to Start

Calibrate

L

ZF

Last Cal.
Ø9Jan98 12.22

Measure

dB

Broadband

Narrowband

Instrument
Ver sio n:

A=Broadband

XX

B=Octaves

XX

C=Third-octaves

XX

Type 1 or 2
Firmware version
Instrument ID

MENU

MENU

Narrow band

models only

Measure Mode

Setup

Calibration
Memory

2/6

Configure
Status

Obtain Menu

L

AF

L

L

AFmx

LL

Aeq

AFmn Zpk

30 100

Single Band

Octaves

Third Octaves

2/3

Factory Setup

User Setup 1

User Setup 2
User Setup 3

2/5

User Setup 4

View Current

View All
Delete Current
Delete All

1/4

13Jan98 1Ø:54:42
512Kb

Memory

1%

Full

2

Runs

L

dB

ZIZ73.6

100

80

60

40

500

12532AZ

2k

8k

dB

Timers Off

Duration Timer
Delay Timer

1/3

Mode

SLM Response
Functions
Dose Results

1/5

Period

Wed 7 Jan1998

9 Jan1998

Fri

13 Jan1998

Tue

15 Jan1998

Thu

1

3

Wed 7 Jan1998
Fri

9 Jan1998

13 Jan1998

Tue

15 Jan1998

Thu

RS232 Comms

Language
Backlight
Time & Date

1/5

Mic. Response

CEL-480
Models only

More
Options

Runs

Runs

More
Options

Broadband

Octaves
Third Octaves

RMS Weight

Time Weight F
Peak Weight Z
Exchange Q 3

L

LL
LL
LL

More Broadband Functions

Threshold

8Hours

L

EP,d

Period 1min

Profile -----

1
2

CEL-440 & CEL-480 SOUND LEVEL METERS Menu Structure

CEL-440/480 SLM
060334 FG-02/June 02

www.casellagroup.com

Think environment Think Casella

AFmx

AFmn

Aeq

Zpk

1/3

1/4

1/14

1/2

1/4

7Ø

T&

WA

-----

-----

01012

A

Broadband
Mode only

3 Narrow­band
14
Broadband
Functions

Broadband
Mode only

More
Options

CEL-480
Models only

FIELD GUIDE to CEL-440/480
Sound Level Meters

Type 2, 1/4"

Microphone

&

Preamplifier

Pull the
knurled

sleeve

outwards to

release the

connector

ON/OFF

Navigator

keys

Start/

MENU

Pause/

Restart

DATA

Access

data

The CEL-440 and CEL-480 Sound Level Meters consist
of the instrument unit preamplifier and microphone
shown.

Protective

do not

grill (

remove

)

Type 1, 1/2"
Microphone

Preamplifier
Red dot

Change
menu

Enables
Quick edit

Back light
Stop

(needs
to confirm)

01009

Narrowband Measurement

From any menu press several times until a narrow-
band measurement screen is displayed.

L

Z

I

100

80

60

40

Narrowband measurement screens show a single
parameter and a frequency range. Both can be changed

Z 73.6

500

12532AZ

by the quick edit function enabled and disabled by .
Press to scan frequencies and store the

measurement results.

If a clock is shown, a timed measurement has been set,
refer to Section 3.1 of the Handbook.

When an auto-stabilised or timed scan is in use, the
instrument waits a short while with the highlight on the
lowest frequency, then steps through the frequency
bands.However, when a manual scan is in use, the

highlight will not move until is pressed to step to
the next frequency band.

Data stored during the current (or other) runs can be
reviewed while more data is being collected. Press

then use the navigator keys to review the data screens.
When sufficient data has been inspected, press to

return to the measurement screen.
When the run is to be stopped, press .

Three options are offered:

Stop run (and store data),
Restart run (abandon current run and start a
new run),
Continue run (continue interrupted run).

Select an option and confirm it by pressing .

dB

8k

2k

01011

DATA

MENU

Fold Line

Indicated Parameters

F: Fast
S: Slow

I

: Impulse
pk: Peak
mx: Maximum
mn: Minimum
eq: Equivalent Level
av: Average
Tm3: Taktmaximal 3 sek
Tm5: Taktmaximal 5 sek
EP,d: 8 hr Exposure
EP,v: Proj. Exposure
N: Noise Percentile
AE: Sound Exposure
TWA: 8 hr Time Wtd Av
TWAv: Proj. TWA.

Casella CEL

Regent House, Wolseley Road,
Kempston, Bedford,
MK42 7JY, United Kingdom.
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.casellagroup.com

Casella USA

17 Old Nashua Road #15
Amherst, NH 03031, U.S.A
Toll Free: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.casellaUSA.com

Fold Line

CEL48ØA.1 vNN.NN
Preamp

Type 1
None

I/O

16/1Ø

Tes t

NNNNNN

ID:

13Jan98 1Ø:54:42

Memory

512Kb

Full

1%

Runs

2
Format

Setup
User Setup 1
Press MENU
Key to Start

Calibrate

L

ZF

Last Cal.
Ø9Jan98 12.22

Measure

dB

Broadband

Narrowband

Instrument
Ver sio n:

A=Broadband

XX

B=Octaves

XX

C=Third-octaves

XX

Type 1 or 2
Firmware version
Instrument ID

MENU

MENU

Narrow band

models only

Measure Mode

Setup

Calibration
Memory

2/6

Configure
Status

Obtain Menu

L

AF

L

L

AFmx

LL

Aeq

AFmn Zpk

30 100

Single Band

Octaves

Third Octaves

2/3

Factory Setup

User Setup 1

User Setup 2
User Setup 3

2/5

User Setup 4

View Current

View All
Delete Current
Delete All

1/4

13Jan98 1Ø:54:42

Memory

512Kb

Full

1%

Runs

2

L

dB

ZIZ73.6

100

80

60

40

500

12532AZ

2k

8k

dB

Timers Off

Duration Timer
Delay Timer

1/3

Mode

SLM Response
Functions
Dose Results

1/5

Period

Wed 7 Jan1998

9 Jan1998

Fri

13 Jan1998

Tue

15 Jan1998

Thu

1

3

Wed 7 Jan1998
Fri

9 Jan1998

13 Jan1998

Tue

15 Jan1998

Thu

RS232 Comms

Language
Backlight
Time & Date

1/5

Mic. Response

CEL-480
Models only

More
Options

Runs

Runs

More
Options

Broadband

Octaves
Third Octaves

RMS Weight

Time Weight F
Peak Weight Z
Exchange Q 3

L

LL
LL
LL

More Broadband Functions

Threshold

8Hours

L

EP,d

Period 1min

Profile -----

1
2

CEL-440 & CEL-480 SOUND LEVEL METERS Menu Structure

CEL-440/480 SLM
060334 FG-02/June 02

www.casellagroup.com

Think environment Think Casella

AFmx

AFmn

Aeq

Zpk

1/3

1/4

1/14

1/2

1/4

7Ø

T&

WA

-----

-----

01012

A

Broadband
Mode only

3 Narrow­band
14
Broadband
Functions

Broadband
Mode only

More
Options

CEL-480
Models only

TOP

FIELD GUIDE to CEL-440/480
Sound Level Meters

Type 2, 1/4"

Microphone

&

Preamplifier

Pull the
knurled

sleeve

outwards to

release the

connector

ON/OFF

Navigator

keys

Start/

MENU

Pause/

Restart

DATA

Access

data

The CEL-440 and CEL-480 Sound Level Meters consist
of the instrument unit preamplifier and microphone
shown.

Protective

do not

grill (

remove

)

Type 1, 1/2"
Microphone

Preamplifier
Red dot

Change
menu

Enables
Quick edit

Back light
Stop

(needs
to confirm)

01009