Casella CEL CEL-352Plus User Manual
Casella CEL Measuring instruments

Introduction
In a few simple steps, this guide will get you up and 
running making noise measurements. We want you to get 
the best performance from your CEL-35X dBadge system 
and recommend that for advanced information you refer 
to the instruction manual.
Charging
Charge the CEL-35X
dBadge by using the charger
provided. During charging the red LED will flash. Ensure
the dBadge has enough charge for the required 
measurement duration by looking at the screen, which will 
show the run time available for the current charge held in 
the battery. The LED will turn blue when charging is 
complete. Charging from flat will take approximately 90 
minutes:
Switching the CEL-35X On/Off
Press the Left (‘L’) key to switch the CEL-35X on. The
CEL-35X will run through a start up sequence as shown 
below.
The first screen displays the model number and the 
firmware version. The next screen shows user defined text 
which is configured using dB35 software.
The dBadge can be switched off by holding down the ‘L’ 
key for 3 seconds.
The final screen displays the current time and date. This is 
automatically set by the software when the dBadge is 
connected to a PC. It is recommended that prior to using 
the dBadge units for the first time, they are connected to a 
PC so that the time is set correctly. The dBadge screen will 
then display data from the last run. See section on 
reviewing measurement data.
Configuring the
dB
adge
By pressing and holding the right (‘R’) key down during the
start up sequence the configuration menu can be accessed. 
Pressing the ‘L’ key will make the changes to the current 
settings, and the ‘R’ key will confirm the changes and move 
on to the next screen. The screens are shown below, once 
the final screen has been confirmed by pressing the ‘R’ 
button, the dBadge will return to standard operation.
Calibration
To calibrate the dBadge, place the CEL-110 acoustic 
calibrator over the microphone as shown below. Be 
careful to push the calibrator straight onto the dBadge 
without twisting, this ensures the screw on microphone is 
not loosened or over tightened.
Switch on the CEL-110 calibrator. The dBadge will
automatically recognise a calibration tone is present and 
enter the calibration mode, showing the screen below.
Press the ‘R’ key to confirm that you wish to calibrate. The
dBadge will take a few seconds to automatically adjust to 
the required level of 114.0dB.
Once calibration is completed a ‘CAL OK’ message will 
appear. The dBadge stores the calibration date, time and 
level then returns to the default screens.
Starting a Measurement
To start a measurement, press and hold both keys for 3 
seconds. During a measurement run the symbol will 
be displayed in the top left of the screen to show a 
measurement is being taken. 
For advice on fitting the dBadge to an individual, please 
refer to manual.
If the memory is to be cleared, a second screen appears 
for confirmation. Change the option to ‘Yes’ by pressing 
the ‘L’ key, then press ‘R’ to confirm deletion.
Fitting and Removing the Windshield
It is recommended the windshield is fitted to the dBadge 
unit when in use. This provides protection and will 
prevent air movement from affecting the measurements. 
When fitting or removing the windshield always hold the 
black plastic ring at the base of the windshield. Locate the 
tabs into the holes then gently twist clockwise to lock. 
For calibration of the dBadge with a CEL-110 acoustic 
calibrator, the windshield will need to be removed. 
Simply twist the black plastic ring at the base of the 
windshield anticlockwise then lift the windshield off. 
DO NOT use the foam to twist the windshield on and 
off.
Press ‘L’ to select either ISO 
(Europe) or OSHA (USA). 
Press ‘R’ to confirm.
Allows the memory to be 
cleared, press ‘L’ to change 
display to ‘Yes’, then press 
‘R’ to confirm.
Screen contrast, press ‘L’ to 
adjust, ‘R’ to confirm 
changes.
Menu language, press ‘L’ to 
change and ‘R’ to confirm.
CASELLA
CeL-350
V1.01
JO E BLO GGS
CO NSULTANTS
23 JUL 05
13:45:03
CONTRAST
DISPLAY MODE
ISO
CLEAR MEMORY
NO
CALIBRATING
Exposure alarm (Blue LED), 
press ‘L’ to enable or disable. 
Press ‘R’ to confirm. Refer to 
manual for details.
CHARGING
27
H rs
Press
Press
CAL. OK
dB
,
114.0
FULL
32
H rs
CEL-352 displayed on 
dBadge ‘Plus’ model
Introduction
In a few simple steps, this guide will get you up and 
running making noise measurements. We want you to get 
the best performance from your CEL-35X dBadge system 
and recommend that for advanced information you refer 
to the instruction manual.
Charging
Charge the CEL-35X
dBadge by using the charger
provided. During charging the red LED will flash. Ensure
the dBadge has enough charge for the required 
measurement duration by looking at the screen, which will 
show the run time available for the current charge held in 
the battery. The LED will turn blue when charging is 
complete. Charging from flat will take approximately 90 
minutes:
Switching the CEL-35X On/Off
Press the Left (‘L’) key to switch the CEL-35X on. The 
CEL-35X will run through a start up sequence as shown 
below.
The first screen displays the model number and the 
firmware version. The next screen shows user defined text 
which is configured using dB35 software.
The dBadge can be switched off by holding down the ‘L’
key for 3 seconds.
The final screen displays the current time and date. This is 
automatically set by the software when the dBadge is 
connected to a PC. It is recommended that prior to using 
the dBadge units for the first time, they are connected to a 
PC so that the time is set correctly. The dBadge screen will 
then display data from the last run. See section on 
reviewing measurement data.
Configuring the
dB
adge
By pressing and holding the right (‘R’) key down during the 
start up sequence the configuration menu can be accessed. 
Pressing the ‘L’ key will make the changes to the current 
settings, and the ‘R’ key will confirm the changes and move 
on to the next screen. The screens are shown below, once 
the final screen has been confirmed by pressing the ‘R’ 
button, the dBadge will return to standard operation.
Calibration
To calibrate the dBadge, place the CEL-110 acoustic 
calibrator over the microphone as shown below. Be 
careful to push the calibrator straight onto the dBadge 
without twisting, this ensures the screw on microphone is 
not loosened or over tightened.
Switch on the CEL-110 calibrator. The dBadge will 
automatically recognise a calibration tone is present and 
enter the calibration mode, showing the screen below.
Press the ‘R’ key to confirm that you wish to calibrate. The 
dBadge will take a few seconds to automatically adjust to 
the required level of 114.0dB.
Once calibration is completed a ‘CAL OK’ message will 
appear. The dBadge stores the calibration date, time and 
level then returns to the default screens.
Starting a Measurement
To start a measurement, press and hold both keys for 3
seconds. During a measurement run the symbol will 
be displayed in the top left of the screen to show a 
measurement is being taken. 
For advice on fitting the dBadge to an individual, please 
refer to manual.
If the memory is to be cleared, a second screen appears 
for confirmation. Change the option to ‘Yes’ by pressing 
the ‘L’ key, then press ‘R’ to confirm deletion.
Fitting and Removing the Windshield
It is recommended the windshield is fitted to the dBadge 
unit when in use. This provides protection and will 
prevent air movement from affecting the measurements. 
When fitting or removing the windshield always hold the 
black plastic ring at the base of the windshield. Locate the 
tabs into the holes then gently twist clockwise to lock. 
For calibration of the dBadge with a CEL-110 acoustic 
calibrator, the windshield will need to be removed. 
Simply twist the black plastic ring at the base of the 
windshield anticlockwise then lift the windshield off. 
DO NOT use the foam to twist the windshield on and 
off.
Press ‘L’ to select either ISO 
(Europe) or OSHA (USA). 
Press ‘R’ to confirm.
Allows the memory to be 
cleared, press ‘L’ to change 
display to ‘Yes’, then press 
‘R’ to confirm.
Screen contrast, press ‘L’ to
adjust, ‘R’ to confirm 
changes.
Menu language, press ‘L’ to
change and ‘R’ to confirm.
CASELLA
CeL-350
V1.01
JO E BLO GGS
CO NSULTANTS
23 JUL 05
13:45:03
CONTRAST
DISPLAY MODE
ISO
CLEAR MEMORY
NO
CALIBRATING
Exposure alarm (Blue LED), 
press ‘L’ to enable or disable. 
Press ‘R’ to confirm. Refer to 
manual for details.
CHARGING
27
H rs
Press
Press
CAL. OK
dB
,
114.0
FULL
32
H rs
CEL-352 displayed on
dBadge ‘Plus’ model
