Casella CEL CEL-63X User Manual
CASELLA MEASUREMENT
Regent House,
Wolseley Road,
Kempston,
Bedford,
MK42 7JY, U.K.
Phone: +44 (0) 1234 844 100
Fax: +44 (0) 1234 841 490
E-mail: info@casellacel.com
Web: www.casellameasurement.com
User Manual
CEL-63x Environmental &
Occupational Noise Meter
HB3356-03
User Manual
CEL-63x Environmental & Occupational Noise Meter
Contents
Contents ...................................................................................................................................... 2
1 Introduction ................................................................................................................... 5
1.1 Structure of this User Manual .......................................................................................... 5
Colour coding .................................................................................................................... 6
1.2 Safety ................................................................................................................................ 7
2 Features ........................................................................................................................ 9
3 Quick reference ........................................................................................................... 10
3.1 Powering the instrument ................................................................................................ 10
Battery supply ................................................................................................................. 10
How to fit new batteries ................................................................................................. 10
Mains DC supply .............................................................................................................. 11
USB supply ....................................................................................................................... 11
Battery condition indicator .............................................................................................. 11
3.2 Using the controls........................................................................................................... 12
Soft keys .......................................................................................................................... 12
Navigation keys ............................................................................................................... 12
Run/Stop key ................................................................................................................... 12
3.3 Set the time and date .................................................................................................... 13
3.4 Calibrating the instrument .............................................................................................. 13
3.5 Making a measurement run ............................................................................................ 16
Measurement view .......................................................................................................... 16
Measurement controls ..................................................................................................... 18
Measurement data sets ................................................................................................... 21
4 Detailed description .................................................................................................... 24
4.1 Microphone and pre-amplifier ........................................................................................ 24
4.2 User controls ................................................................................................................... 24
Soft keys .......................................................................................................................... 24
Navigation keys ............................................................................................................... 25
Run/Stop key ................................................................................................................... 25
4.3 Screen groups ................................................................................................................. 25
Switch-on ......................................................................................................................... 26
Status .............................................................................................................................. 27
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CEL-63x Environmental & Occupational Noise Meter
Measurement stop screen ............................................................................................... 27
Calibration mode ............................................................................................................. 29
Measurement run screens ............................................................................................... 31
Menu screens .................................................................................................................. 33
USB connect mode .......................................................................................................... 47
4.4 Measurement views ........................................................................................................ 48
User settings.................................................................................................................... 48
Measurement functions ................................................................................................... 50
4.5 Connections .................................................................................................................... 55
Power input port ............................................................................................................. 55
Mini B USB port .............................................................................................................. 55
AC and DC output port ................................................................................................... 56
5 Mode Selection (SLM, Online, NNR) ............................................................................ 57
5.1 General ............................................................................................................................ 57
5.2 SLM Mode ....................................................................................................................... 57
5.3 Online Mode ................................................................................................................... 57
5.4 NNR Mode ....................................................................................................................... 57
6 Specifications .............................................................................................................. 59
6.1 General ............................................................................................................................ 59
6.2 Standards ........................................................................................................................ 59
6.3 Measurement range ........................................................................................................ 60
6.4 RMS frequency weightings ............................................................................................. 60
6.5 Octave and 1/3-Octave measurement ............................................................................. 60
6.6 Peak measurement ......................................................................................................... 60
6.7 RMS detector .................................................................................................................. 60
6.8 Noise floor ...................................................................................................................... 60
6.9 Frequency response ........................................................................................................ 60
6.10 Time weightings .............................................................................................................. 61
6.11 Correction filters ............................................................................................................. 61
6.12 Reference direction ......................................................................................................... 61
6.13 Reference conditions ...................................................................................................... 61
6.14 Operating environmental conditions .............................................................................. 61
6.15 Effects of temperature .................................................................................................... 61
6.16 Effects of humidity .......................................................................................................... 61
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CEL-63x Environmental & Occupational Noise Meter
6.17 Storage environmental conditions ................................................................................. 61
6.18 Microphones ................................................................................................................... 62
6.19 Calibration ....................................................................................................................... 62
6.20 Power supply .................................................................................................................. 62
6.21 Internal clock .................................................................................................................. 62
6.22 Languages ....................................................................................................................... 62
6.23 Electromagnetic compatibility ........................................................................................ 63
6.24 Effects of AC power frequency fields ............................................................................. 63
6.25 Tripod mounting ............................................................................................................. 63
6.26 Display ............................................................................................................................ 63
6.27 Memory ........................................................................................................................... 63
6.28 Connectivity .................................................................................................................... 63
6.29 Available data sets ......................................................................................................... 64
6.30 Physical ........................................................................................................................... 67
7 Care and maintenance ................................................................................................. 68
8 Servicing and Warranty arrangements ........................................................................ 69
8.1 Inspection and test ......................................................................................................... 69
8.2 Lifetime Warranty Terms and Conditions ....................................................................... 69
8.3 Repairs ............................................................................................................................ 70
8.4 User servicing .................................................................................................................. 71
9 Glossary ...................................................................................................................... 72
10 Additional information ................................................................................................. 75
10.1 Sound calibrators – Level corrections ............................................................................ 78
10.2 Response characteristics ................................................................................................ 79
10.3 Data and Protocols for Online Mode ............................................................................. 83
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CEL-63x Environmental & Occupational Noise Meter
1 Introduction
The CEL-63x series is a family of noise meters (where „x‟ is a digit that indicates
the model variant – see Figure 14 on page 59). These are powerful
measurement tools to support a wide range of industrial, health and safety, and
environmental noise measurement requirements.
For a breakdown of the different models and their functionality, refer to
section 6 Specifications beginning on page 59.
The CEL-63x instrument uses the latest digital signal processing technology to
provide a full range of functions, including integrating and real-time octave and
1/3-octave band analysis.
The CEL-63x instrument uses a colour TFT screen to show a range of
information, including operating menus and messages, warnings, and the
results of measurements. The screen is clear and easy to read under all ambient
lighting conditions, including total darkness.
Measurements captured by the CEL-63x instrument conform to international
standards for acoustic measurement. The measurements are saved
automatically in high-capacity internal Flash memory. You can transfer the
measurement results to a PC where you can manage the results and create
reports by using the Casella insight data management software.
Audio recording is available on all CEL-63X models. Audio notes are available
on all models to allow annotation of measurements. On CEL-632 and CEL-633
models, audio can be stored with data markers or for events triggered by a
specific parameter e.g. Leq.
1.1 Structure of this User Manual
The structure of this User Manual is designed to help you find the information
and instructions you need to complete a task easily. Refer to section 3 Quick
reference on page 10 for instructions to use the CEL-63x instrument.
If you need more information about any of the CEL-63x instrument‟s controls,
screens and features, then you should read the section 244 called Detailed
description, which begins on page 24.
To help you find the information you need quickly in the electronic version of
this User Manual, it includes „clickable‟ links. The links appear as blue
underlined text. You can also click the names of chapters and sections in the
bookmark panel, and in the table of contents, to jump to that part of the
manual.
5 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
This colour…
indicates…
Cyan
Memory results screens
Green
Measurement run screens
Red
Measurement stop screens
Yellow
Calibration mode
Blue
Menu screens
Grey
USB connection mode
Colour coding
The CEL-63x instrument‟s screens use a colour code to help you identify their
purpose quickly. This manual uses the same colour codes. Refer to section 4.3
“Screen groups” beginning on page 25 for more information.
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CEL-63x Environmental & Occupational Noise Meter
WARNING
Always be aware of the risks in the environment where you are working.
The CEL-63x instrument is NOT intrinsically safe. DO NOT use it in an
atmosphere where explosive vapours or dusts might exist.
Wear approved ear defenders when making measurements in noisy
environments.
Wear approved protective clothing and footwear suitable for the environment
where you are making measurements.
Always follow local safety regulations, and be aware of risks in the area where
you are working.
CAUTION
Use the CEL-63x instrument only as instructed in this User Manual. Do not use the
instrument for any purposes for which it has not been designed.
CAUTION
The CEL-63x is a precision instrument. Always handle it with care.
Do not use the CEL-63x instrument if it has been damaged. Refer to section 8 Servicing
and Warranty arrangements on page 69 for instructions to follow if the instrument has
been damaged or has developed a fault.
1.2 Safety
The CEL-63x instrument does not present a safety risk when you use it as
instructed in this User Manual. However, it is possible that the environment
where you use the instrument may present a safety risk, and you must ALWAYS
follow correct, safe working practices.
7 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
CAUTION
The CEL-63x instrument can operate from a battery power supply.
Use only batteries of the correct type, and do not mix battery types in the
instrument. Refer to “Battery supply” on page 10 for advice about battery types.
Do not try to charge non-rechargeable batteries.
Do not leave discharged batteries in the CEL-63x instrument.
Install new batteries as a complete set. Do not fit batteries that have a mixed
state of charge. Refer to “How to fit new batteries” on page 10 for instructions to
install batteries.
Remove all batteries from the CEL-63x instrument if you will not use the
instrument for a long time.
Always follow local regulations to dispose of used batteries.
CAUTION
The CEL-63x instrument is not waterproof. Do not immerse the instrument in water or
use it in the rain.
8 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
When you attach the pre-amplifier to the instrument, make certain the
red dot faces towards the front of the instrument.
2 Features
Figure 1 shows the main features of the CEL-63x instrument. Refer to Figure 1
when you perform the tasks and instructions in this User Manual.
Figure 1. Main features of the CEL-63x sound level meter
1. Windshield (to cover the removable microphone)
2. Pre-amplifier (removable – pull the knurled body of the pre-amplifier
connector away from the instrument body)
3. ON/OFF key
4. Display screen
5. Soft keys
6. Navigation keys
7. Run/Stop key
Refer to section 4.2 “User controls” on page 24 for a description of the Soft
keys, of the Navigation keys, and of the Run/Stop key.
9 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
IMPORTANT
To save power when operating on batteries, the CEL-63x instrument switches OFF
automatically if no measurement run is in progress and there is no key-press activity
for five minutes.
You should operate the instrument on a mains DC power supply if you must leave it
unattended while making an extended measurement run. The instrument does NOT
switch off automatically when it operates from a mains DC supply.
3 Quick reference
3.1 Powering the instrument
The options for powering the instrument are as follows:
Batteries
12 V DC adaptor (part number -PC18)
USB connection (part number -CMC51)
Battery supply
You can use alkaline or rechargeable AA batteries to operate the instrument. Do
not use a mixture of alkaline and rechargeable batteries at the same time.
The operating time that you can expect from a fully charged or new set of
batteries depends on the battery capacity and whether you use the instrument‟s
backlight. Environmental conditions such as the ambient temperature also
affect battery life. See section 6 “Specifications” beginning on page 59 for some
typical battery life examples.
You should also carry a spare set of batteries.
How to fit new batteries
Before you begin:
Read the caution notice about Batteries on page 8.
You should check that the batteries have adequate battery life before you begin
a measurement. Replacement batteries should be new or fully charged.
10 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
The CEL-63x instrument disconnects the internal batteries when you connect a mains
DC supply to it. The batteries do not recharge when you operate the instrument from
a DC supply.
If you use rechargeable batteries with the CEL-63x instrument, you must use an
external battery charger of the correct type to charge the batteries. Follow the
charging instructions supplied by the battery manufacturer to charge the batteries.
Fitting the batteries
You do not need any special tools to fit new batteries to the instrument.
1. If necessary, press and hold the ON/OFF key to switch the instrument
OFF.
2. Remove the three exhausted batteries from the battery compartment.
3. Fit fully-charged batteries into the battery compartment, observing the
polarity markings.
4. Press and release the ON/OFF key, and check the battery symbol shows
the batteries have a good charge.
Mains DC supply
If you need to operate the instrument for a long period, you should operate the
instrument from a mains DC power supply if possible. The use of AA batteries is
also recommended in case of power interruption.
The instrument DOES NOT include a mains DC supply as standard. Please
obtain and use an optional Casella power supply (part number -PC18).
USB supply
When you connect the instrument to a PC through a USB cable, the instrument
receives power to operate at 5 V DC from the PC. There is no need to use a
mains DC power supply to operate the CEL-63x instrument when you connect it
to a PC.
Battery condition indicator
When the CEL-63x instrument receives power from a mains DC power supply
or from a USB port on a PC, the battery condition symbol on the instrument‟s
screen always shows a fully charged battery condition, even if the batteries are
not fully charged.
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CEL-63x Environmental & Occupational Noise Meter
3.2 Using the controls
The CEL-63x instrument is designed to allow
easy operation. The instrument has only
seven (7) control keys, shown on the right.
These are as follows:
The Soft keys (A and B).
The Navigation keys (C) .
The Run/Stop key (D) .
The instrument is small in size, and it is
usually possible to hold and operate it using only one hand. For safety, you can
attach a wrist strap near the bottom of the instrument.
The simple descriptions below show the purpose of the user control keys. Refer
to Section 4.2 “User controls” on page 24 for a full description of the user
controls.
Soft keys
The Soft keys A and B allow you to select between the two options showing at
the bottom of the screen. These two options change, depending on which screen
is showing on the instrument‟s display.
Navigation keys
The four Navigation keys allow you to select items on the main part of the
screen. Press the , , or Navigation key to change to the next selection
in the direction of the arrow.
Run/Stop key
The Run/Stop key allows you to start and to stop a Run.
Press the key when the instrument is in the Stop mode to start the Run.
Refer to Measurement stop on page 27 for information about the Stop mode.
Press the key during a Run to stop the Run.
12 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
You can set the instrument‟s clock to the exact time by setting the hour and the minute,
and then pressing the Save Soft key when the second hand of a reference clock
reaches the start of the minute.
3.3 Set the time and date
Follow the steps below to set the clock.
1. Press and release the ON/OFF key to switch the instrument ON.
2. Wait approximately 10 seconds until the instrument‟s initialization
screen changes to the Status screen.
3. Press the Menu Soft key to see the instrument‟s Settings menu.
4. Follow the instruction steps shown in Figure 2 to set the time and the
date.
Figure 2. Setting the time and date
3.4 Calibrating the instrument
The CEL-63x is a precision measuring instrument. You should calibrate it
before each measurement run and again after each measurement run so that
you can be certain its measurements are accurate.
To calibrate the instrument you will need a suitable calibrator that generates a
1 kHz reference tone. Depending on the type of calibrator, the reference tone
can have a nominal sound pressure level of either 94 dB or 114 dB. Check the
information supplied by the calibrator manufacturer to find the exact sound
pressure level that the calibrator generates.
13 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
It might be necessary to change the calibration reference level so that it includes the
pressure-to-free field correction applicable to the fitted microphone. For Casella
microphones, and assuming a 114.0 dB nominal calibrator pressure, the reference
level should be as follows:
• CEL-251 or CEL-252 = 114.0 dB (if using windshield)
• CEL-251 or CEL-252 = 113.9 dB (without windshield)
Each measurement run stores both the before-run and the after-run calibration
results, including any changes in the calibration. This confirms the absolute
accuracy of the measurement.
1. Remove the windshield from the CEL-63x instrument‟s microphone.
2. Press and release the ON/OFF key to switch the instrument ON.
3. Wait approximately 10 seconds until the instrument‟s initialization
screen changes to the Status screen.
4. Press the Menu Soft key to see the instrument‟s Settings menu.
5. Follow the instruction steps shown in Figure 3 to set the instrument‟s
calibration reference level so that it is the same as the sound pressure
level that the calibrator generates.
Figure 3. Setting the instruments calibration reference level
6. Save and exit to the Measurement screen.
7. Gently fit the calibrator to the instrument‟s microphone and press it into
position as shown in Figure 4.
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CEL-63x Environmental & Occupational Noise Meter
NOTE
Calibration mode operates only in Stop mode (when the instrument shows red screen
bars). It does not operate while a run is active.
Figure 4. Instrument calibration
8. Press the ON/OFF key on the calibrator (item 1 in Figure 4) to switch
the calibrator ON.
The CEL-63x instrument selects the calibration screen automatically
when it detects a stable 1 kHz calibration tone.
9. Follow the instruction steps in Figure 4 to complete the calibration and
save the results.
Note that the calibration takes typically less than 10 seconds to complete
and for the screen to display the word “PASSED”.
10. Press the Exit soft key on the instrument.
11. Press and hold the ON/OFF key on the calibrator to switch the
calibrator OFF.
12. Remove the calibrator from the instrument‟s microphone, and re-fit the
microphone‟s windshield.
You have now calibrated the CEL-63x instrument and made it ready for a
measurement run.
15 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
3.5 Making a measurement run
The CEL-63x instrument measures, calculates and records all noise functions
simultaneously during a measurement. In this manner it removes the need for
critical set up of the instrument before any measurement.
Measurement runs can be recorded as cumulative or periodic data sets, as well
as a fast profile time history. For an explanation of these modes, refer to
“Measurement data sets” beginning on page 21.
Measurement view
The measurement view simply defines which functions you view on the
instrument‟s screen, either while making a measurement or while reviewing
measurements recorded previously.
The instrument has a wide range of measurement view options that you can
choose. The individual types of instrument in the CEL-63x range offer different
views. Refer to section 6 Specifications beginning on page 59 for more
information.
There are four fixed views that meet international requirements for
workplace noise measurements. You can review the functions displayed
for each of these fixed views, but you cannot change them.
There are two fixed views for environmental noise measurements. These
views display the functions that are commonly reported for
environmental measurements. You can review the functions for each of
these fixed views, but you cannot change them.
There are two user-defined views that allow you to review and change
the measurement functions.
Use the Navigation keys to select one of the measurement view options, and
press the right-hand Soft key to set the measurement view. The screen shows
the word “Active” next to the measurement view you have set.
Figure 5 on page 17 explains how to select a fixed measurement view and how to
review the functions for the selected measurement view.
Figure 6 on page 18 explains how to select a user-defined measurement view
and how to review and change the functions that it uses.
16 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Fixed measurement view
Figure 5. Set a fixed measurement view
17 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
For measurement runs that have a long duration, you should use a mains DC power
supply to operate the instrument.
* Press the Run/Stop control key at
step 12 to select or deselect the chosen
function.
Press and hold the key to set the main
SPL value that is displayed in the stop
mode.
User-defined measurement view
Figure 6. Set a user-defined measurement view
Refer to Section 4.4 Measurement views on page 48 for a description of the
User 1 and User 2 settings that you can use.
Measurement controls
These settings control how the instrument starts and stops each measurement
run. You can choose among three options.
Figure 7 explains how to select each of the timed operation modes.
18 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Key press
The key press mode allows you to start and stop each
measurement run by pressing the Run/Stop key.
This „manual control‟ of the instrument is useful when you do
not know the duration of a measurement run.
Fixed duration
The fixed duration mode allows you to set the duration of a run.
You can set the duration in steps of one second, in the range
00:00:00 to 24:00:00 (HH:MM:SS).
You must press the Run/Stop key to start the run manually, but
the instrument will stop the run automatically after the duration
you have set. If necessary, press the Run/Stop key to stop the run early.
The fixed duration mode is useful if you need to make a single measurement
run where you know the duration but you do not know the exact time when the
measurement run must start.
Timers
The timers mode allows you to set the day of the week and the
time when a run starts and stops. You can set the instrument to
start and stop one or more runs on different days and at different
times.
You can set the pattern of runs to occur only once, or you can set
the pattern of runs to repeat on the same days and at the same times each week.
When you use the timers mode you must leave the instrument switched ON
from the start of the first run until after the end of the last run. You must
therefore operate the instrument from a mains DC power supply so that the
measurement runs occur without interruption.
This timer mode is especially useful when the instrument is used together with
the environmental kit case. This enclosure supports a higher capacity battery
for short- to medium-term environmental measurements.
19 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Figure 7. Measurement controls
20 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Measurement data sets
The data sets option controls how the CEL-63x instrument records
measurements during a run. There are two options that you can choose.
Cumulative measurements.
Periodic measurements.
Both options can be used with Profile recording.
Figure 8. Measurement data sets
Cumulative measurements
A cumulative measurement produces
a single set of results for the entire
measurement duration.
When you use the CEL-63x instrument in cumulative measurement mode, the
start and stop times depend on whether you have selected Key press, Fixed
duration or Timers for the instrument.
21 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
When used with periodic recording, the profile interval can only be set to a subinterval of the cumulative measurement duration to produce an exact number of
profile samples per period.
The cumulative data set alone does not provide time history
information. To include time history information for the
measurement, you can enable Profile recording.
Profile recording
A profile recording consists of a series
of fast measurements made at the
same time as a cumulative
measurement.
The profile recording supports a more limited set of functions, including L
L
, L
AIeq
Cpk
, L
AFmax
, L
ASmax
, L
, and optional Ln% statistics (Broadband Fast
AImax
Aeq
A-weighted Lns only).
When you use profile recording, you can set the interval of each of the profile
measurements to one of the following:
OFF
100ms, 1, 2, 5, 10, 15, 20, 30 or 60 seconds
2, 5, 10, 15, 20, 30 or 60 minutes
Periodic measurements
Periodic measurements allow the total measurement duration to
be divided into separate fixed time intervals. In Periodic mode, a
full set of results is stored at the end of each time interval,
whereas in Cumulative mode a single full set of results is stored
at the end of the measurement run.
,
In effect, the original full set of cumulative results is captured at periodic
measurement intervals.
Figure 9. Repeating cumulative and profile data sets
22 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
To select the Periodic data capture mode, set the Data Sets Mode control to
Periodic, and then select the Periodic Interval. The Periodic Interval is the
time from the start of one period to the start of the next period. You can set the
Periodic Interval to one of the following:
1, 2, 5, 10, 15, 20, 30 or 60 minutes
2, 4, 6, 8, 12 or 24 hours
Synchronise time
The Synchronise Time option synchronises both the periodic and the profile
times to the actual time. For example, if a periodic time is 1 hour and a run
starts at 09:18 with this option enabled, then the first period finishes at 10:00.
The second and all subsequent periods start on the whole hour.
The profile measurements are similarly synchronised to the period interval.
If the Synchronise Time option is disabled, then in this example the first
period continues to 10:18; the second period continues to 11:18, and so on.
You can also synchronise runs by using the timers, by starting and ending runs
on whole time period intervals. This synchronises both the periodic and the
profile measurements.
23 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
For High range measurements above 140dB a special microphone (-MIC1) and
adaptor (-MPA1) can be used. See page 56.
4 Detailed description
4.1 Microphone and pre-amplifier
The CEL-63x instrument has a removable ½-inch (12.7 mm) microphone. This
is a pre-polarised microphone that uses a permanently charged material in its
construction.
The instrument is supplied with a windshield. The windshield provides
protection from wind and from minor mechanical damage. The windshield
should always be fitted to the microphone.
There are two classes of microphone available, which have different
sensitivities.
The Class 1 microphone (CEL-251) has 50 mV/Pa sensitivity
The Class 2 microphone (CEL-252) has 30 mV/Pa sensitivity
4.2 User controls
Soft keys
The Soft keys select between the two options showing at the bottom of the
screen. These two options change, depending on which screen is showing on the
instrument‟s display. Therefore, the Soft keys can have different functions,
depending on which screen the instrument is showing.
Usually, you must press the Soft key on the right to select a function, and you
must press the Soft key on the left to exit a screen or cancel a function.
Press the Soft key for the option that you need to select that option.
24 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Navigation keys
The four Navigation keys allow you to select items on the main part of the
screen. Press the , , or Navigation key to change to the next selection
in the direction of the cursor arrow.
Run/Stop key
The Run/Stop key allows you to start and to stop a run.
Press the key when the instrument is in the Stop mode to start the run.
Refer to Measurement stop on page 27 for information about the Stop mode.
Press the key during a run to stop the run.
4.3 Screen groups
The CEL-63x instrument has groups of screens that allow you to set up and
operate the instrument, and to see the results of the instrument‟s
measurements. The screens have colour-coded bars at their top and bottom
edges, to help you identify which screen group they belong to. Refer to Colour
coding on page 6 and Figure 10 below for the colour codes.
Note that the contents of some screens may vary, depending on the model of
instrument you are using.
Figure 10. Screen groups
Each screen group includes one or more separate screens.
Figure 10 shows how the screen groups relate to each other. Click any of the
groups shown in Figure 10 to read a description of that group.
25 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
NOTE
This screen also provides access to system tools. These tools enable the internal
memory to be reformatted, allow setting the memory to be read/write from the
connected PC, and allow setting the AC output on the bottom socket to output the low
or high part of the dynamic range.
NOTE
The system tools also allow selection of either 140 dB or 165 dB full-scale modes. On
CEL-632 and CEL-633 three different modes (SLM, Online and NNR) may be set.
Please refer to Mode Selection (SLM, Online, NNR) on page 57 for descriptions of
these modes. (For standard operations use SLM mode).
Switch-on
The CEL-63x instrument shows an introduction screen after you switch the
instrument ON. The introduction screen shows the following information about
the instrument:
The model number of the instrument (for example, CEL-63x).
The instrument‟s serial number.
The firmware version that is operating inside the instrument.
User-defined details, for example the user‟s name. These details must be
set up by using the Casella insight data management software PC
software, and then transferring them to the instrument.
Write the serial number and the firmware version number in a safe location.
You should give this information to the service agent if the instrument develops
a fault.
26 Casella CEL
CEL-63x Environmental & Occupational Noise Meter
Status
The Status screen shows the following information about the instrument‟s
current operating condition:
The current date and time.
Runs free
Percentage of memory free
The battery voltage. Refer to “Battery supply” on page 10 for more
information about battery types.
The type of microphone response field the instrument is using.
The pre-defined setup used by the instrument.
Serial Number
Firmware Version
You cannot make changes to the displayed setting.
Measurement stop screen
The measurement stop screens show the current instantaneous sound pressure
level. Different screen views include the following:
The Octave screen.
The Graph screen.
Select the View option to toggle between the two screens.
Select the Menu option to use the setup screens. Refer to Menu screens on
page 33 for instructions to use the setup screens.
27 Casella CEL
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