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SMG/interlink® |
Instruments
for Environmental, Health and Safety Professionals,
HVAC Engineers and Technicians, Manufacturing Engineers, Quality Control and Laboratory Professionals |
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Digital Integrating Sound Level Meter
CEL-244 Digital Integrating Sound Level Meter
The CEL-244 is a completely new design of integrating sound level meter featuring the power of Digital Signal Processing (DSP) technology and the simplicity and low cost of a traditional analog instrument. It can be used for a wide range of noise measurement tasks and is suitable for many everyday applications.
Complying with all ANSI and IEC accuracy specifications in the Type 2 category the CEL-244 will appeal to new and experienced users alike.
- Simple 2 button operation
- Wide range from 30 to 130dB
- Large graphic LCD screen 128 x 128 pixels
- Slow, Fast and Impulse time weightings
- Current, highest and time average noise levels shown in monochrome LCD display
- Large numeric and analog bar graph display
- Output to computer for simple data logging with PC
- Auto calibration at either 114 or 94 1 kHz decibel level
- Scrolling sound level display Applications
The CEL-244 is an ideal instrument for industrial hygiene measurements of noise in the workplace. The meter has a low and high measurement range that each covers a full 70dB. It can be used for machinery noise surveys as well as all general purpose workplace noise level measurements. With the A and C frequency scales and the S, F and I time response (Slow, Fast and Impulse) the meter can be used to assess the right hearing protectors using the NRR method.
The non-decaying maximum hold and the integrated Leq/Lavg time average value of variable noises are displayed on the screen until reset by the user. Max 70.8 LAF 62.7dB RESET dB main display scrolling time history display
The new CEL-244 features a standard ¼” threaded socket on the back of the meter to allow it to be mounted on a tripod for fixed measurement applications. The meter is powered from 3 x AA alkaline batteries and will run for up to 35 hours on its own or continuously when powered from a mains-to-USB style adapter or from a computer. Digital output via a USB mini A socket is available plus analog ac (or dc) voltage output through a 2.5mm jack socket to connect the CEL- 244 to other external computers or recorders or to the optional Windows dB24 software package. Standard or computer output kits are available.
Casella CEL-244 General Specifications
| Accuracy: | ANSI S1.4 & S1.43 Type 2, IEC 61672-1 2002-5 |
| Microphone type: | ¼” Electret mic. in standard ½” fixed housing |
| Reference Conditions: |
68°F
(20°C) air temperature, |
| Operating Temperature Range: |
32
to 104°F (0 to 40°C) (Class 2)
|
| Effect of Humidity: |
Less
than ±0.5dB over the range 30 to 90% RH
(non-condensing), rel. to value at ref. conditions |
| Operating pressure range: |
650
to 1080 mbar (65 to 108 kPa)
|
| Batteries: |
3
x AA Alkaline or rechargeable types
|
| Battery Life: (hours) |
Up
to 35 hours
|
| Dimensions w x h x d: (in/mm) |
2.8
x 8.3 x 1.2 in (71.5 x 212.0 x 31.0 mm)
including preamplifier and microphone |
| Weight including batteries: (oz/gm) |
8.8
oz (< 250g)
|
| Operator controls: |
Buttons
for power On/Off and 2 x context sensitive menu selection
plus initial configuration screen |
*** Every CEL-244 is supplied with an initial individual calibration and conformance certificate
Technical Specification - Performance
| Total measurement range (dB) |
30
to 130
|
| Dynamic span on single range (dB) |
70
|
| Number of measurement ranges - 2 ranges (Low and High dB) |
30
– 100 & 60 – 130
|
| Noise floor (A weighted dB) |
<33
|
| Frequency weightings |
A
and C
|
| Time weightings |
Slow,
Fast and Impulse
|
| Displayed parameters available on all user screens |
Instantaneous
level - Lp,
Maximum level – Lmx Time average value – Leq, Lavg |
| Reset of maximum and average level by user |
Yes
– with non-decaying max hold
|
| Display type |
128
x 128 dot matrix LCD digital
including real-time analog bar graph scale |
| Display resolution – numeric (dB) |
0.1
|
| Display resolution – graphical (dB) |
1
|
| Update rate for display (seconds) |
0.5
|
| Displayed time span for time history chart (minutes) |
Last
1 or 5
|
| Calibration method |
Automatically
recognized by meter
|
| Signal detected when calibrator placed over microphone at 1 kHz frequency |
Calibration
level set to 114.0 or 94.0 dB
without the need for user adjustment |
| External power option (5 Vdc) |
Yes
with CMC51 cable via USB socket
|
| Analog outputs |
AC
(and optional DC) via 2.5 mm jack socket
|
| AC
output characteristics - (Provided for DAT tape / PC wav file recording or headphone applications) |
Approx
0.85V RMS FSD output on selected sound level measurement range.
Minimum load impedance 22kW.
|
| DC
output characteristics - (Provided at time of order as option for connection to chart recorder or PC data logging system) |
0
to 1.3V DC for FSD on selected range.
Output corresponds to selected frequency and time weighting. 2kW Output impedance |
| Digital output |
USB
2.0 format of instantaneous sound level
via ‘mini A’ USB socket (also powers meter) |
| Digital output characteristics – (value output once per second) |
Instantaneous
SPL output (software required)
as per selected frequency and time weightings. |
Ordering Information
| CEL-244 | Integrating Sound Level Meter Type 2 with foam windscreen and wrist strap |
| CEL-110/2 | Acoustic calibrator Class 2 including ½” to ¼” microphone coupler |
| CEL-6841 | Foam windscreen to protect against wind induced interference |
| CEL-6840 | Attaché kit case for meter and standard accessories |
| CMC51 | USB mini A cable from meter to computer for remote power/download |
| CEL-6842 | dB24 software for data logging in spreadsheet format file |
| Other items available - | |
| CEL-244/K1 | Standard sound level meter kit including meter, calibrator, windscreen and kit case plus various accessories, batteries, wrist strap etc. |
| CEL-244/K2 | All items in K1 kit plus CMC51 USB cable to PC plus dB24 software |
| CEL-244/6 | Pack of 6 x CEL-244 sound level meters for larger bulk purchases |
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to SMG/interlink®
For more information Email 
SMG/Interlink®
Interlink Marketing Corporation
dba SMG/interlink®
PO Box 260795
Plano, Texas 75026
Toll free 1-800-804-6196
Ph: 972-985-0883
Fx: 972-985-3252
2203 Glen Forest Ln
Plano, Texas 75023
Copyright © 1997-2012 Interlink Marketing Corporation
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