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. 
Enable/Disable Quick Edit.
MENU Display Main menu (may require several presses).
DATA |
Accesses data screens. |
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On screen show active keys. |
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Shows that Quick Edit mode is available. |
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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.
Press MENU 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.
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LZF |
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Last Cal. |
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01031 |
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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 |
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then use |
and |
to adjust |
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the display to the correct value. |
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Press |
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to save the calibration. |
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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-, timeand 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 |
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several times until a broad- |
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band measurement screen is displayed. |
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LAF |
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Quick Edit is |
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LAeq |
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LZpk |
01010 |
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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.
Press DATA then use the navigator keys to review data
screens.
When sufficient data has been inspected, press MENU 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 
.
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. 
Enable/Disable Quick Edit.
MENU Display Main menu (may require several presses).
DATA |
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.
Fold Line
Fold as Shown
Press 
to switch the instrument on and obtain the Calibration Check screen.
Press MENU 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.
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480 |
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-440/ |
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TO |
CEL |
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GUIDE |
Meters |
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FIELD |
Level |
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Sound |
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Protectivenot |
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(do |
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grill |
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remove |
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2, |
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1, |
1/2" |
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Microphone |
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1/4" |
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Type |
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Microphone |
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Preamplifier |
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Type |
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Preamplifier |
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Red |
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dot |
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the |
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Change |
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Pull |
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knurled |
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menu |
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sleeve |
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to |
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Enablesedit |
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the |
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outwards |
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Quick |
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release |
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connector |
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light |
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ON/OFF |
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Back |
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Navigatorkeys |
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(needs |
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Stop |
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Start/ |
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to confirm) |
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01009 |
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Pause/ |
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Restart |
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Access |
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data |
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Fold Line
Print on A3
Cut Here
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LZF |
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dB |
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Last Cal. |
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|
Ø9Jan98 12.22 |
01031 |
||||
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|
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||
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-, timeand 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,
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 broadband measurement screen is displayed.
|
LAF |
|
|
|
|
|
|
|
|
|
|
dB |
|
Quick Edit is |
||||
LAFmx |
|
|
|
LAeq |
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available |
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LAFmn |
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LZpk |
01010 |
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30 |
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|
|
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. |
Cut Here |
||||||
|
|
|
|
|
|
|
|
Press DATA then use the navigator keys to review data |
|
||||||
screens. |
|
|
|
|
|
|
|
When sufficient data has been inspected, press MENU 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 
.
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