If you’re looking to meet any environmental noise standard or regulations, an optimus green is your solution.
Simple to use with the very highest level of performance, you can be sure that an optimus green will give you what you need for both environmental and occupational noise measurements.
- Very simple to use with only 3 button pushes needed to start a measurement
- Every functions measured at the same time so there’s no risk of missing data
- Measures Environmental & Occupational noise parameter at the same time
- High resolution color OLED screen with ambient light sensor allows
- 120dB measurement span removes problems with setting the correct range
- 4GB memory with option of 32GB for long term measurements
- Option of 1:1 & 1:3 octave band filters
- VoiceTag audio note recording lets you store notes and information about each measurement
- Acoustic Fingerprint audio triggering and audio recording
- Licence free NoiseTools software supplied as standard with no installation restrictions to save you money
Simple operation to make noise measurements easy
The instruments will measure every parameter simultaneously so there is no possibility of you setting the wrong function, but only the most important data is displayed on the screen. Depending upon the version, you can get the information you need to meet regulations such as OSHA, MSHA, ACGIH, EU, ISO and many more as well as repeating measurements which include Leq, Lmax and Ln’s.
Frequency analysis is available in the A Version (1:1 Octaves) and the B Version (1:1 & 1:3 Octaves) along with Audio Recording during measurements and VoiceTag™ for note taking.
Quick, simple and easy to use
With just three button pushes you can start a measurement and get all of the information you need to assess and deal with your noise issues.
Your investment is protected as we’ve designed all of the optimus instruments to be upgradable with new and additional measurement functions.
Record a VoiceTag™ before each measure to store your notes and comments directly into the noise meter. When you download the measurements to the NoiseTools software, click on the icon to replay and listen to your notes.
Audio Recording during measurements
A feature unique to the optimus green sound level meters is the Audio Recording during measurements. You can record the actual noise during a measurement by either pressing the Audio Start/Stop buttons or by using the triggering functions.
What ever you need, it’s already measured.
All of optimus sound level meters will measure all of the available functions at the same time. This means that no matter what the display is showing, you can be sure that you can’t choose the wrong function.
For example, if you’ve set the instrument to display the Leq and you need to see the 1:3 Octave Bands, just press the right arrow key twice and you’ll see the 1:3 octave bands. Press again to see the Dose view which will give you all of the information you need to meet OSHA, MSHA or ACGIH.
Optimus Green Features
Simple operation to make noise measurements easy. The instruments will measure every parameter simultaneously so there is no possibility of you setting the wrong function, but only the most important data is displayed on the screen.
- Simple operation ensures that you get the functions you need quickly & easily
- Simultaneous measurement & data logging of all available parameters
- Simultaneous A, C & Z Frequency Weightings
- Simultaneous F, S & I Time Weightings
- Real-time 1:1 & 1:3 Octave Band Filters
- NR & NC values & curves on screen
- Tonal noise analysis
- Up to 28 statistical Ln % values
- Single 120dB measurement range
- Acoustic Fingerprint™ audio triggering, recording & alerts during measurements for replay and analysis
- VoiceTag™ audio note recording
- AuditStore™ measurement verification
- Repeating measurements with manual or automatic control
- Pause & Back Erase functions
- High resolution colour OLED display and back-lit keypad for night-time measurements
- 4GB memory capable of storing over 10,000 measurements (expandable up to 32GB)
- Compatible with CK:670 & CK:680 outdoor noise measurement kits
- Measure up to 170dB with the optional MV:200EH microphone system
Outdoor Measurement Kits
Where there is a need to measure noise levels outdoor or over long periods, the optimus green sound level meters can be used with the CK:670 and CK:680 outdoor measurement kits.
These kits comprise a weatherproof case which contains the instrument and battery pack(s) along with an interface to external power and USB. The kits also include the MK:170 outdoor microphone which provides weather protection for the microphone capsule and connects via a 10m cable to the main enclosure.
The CK:680 also contains a 3G/GPRS modem and GPS location receiver which allows the noise measurement data to be downloaded remotely to the NoiseTools software via the Optimus Cloud system.
When used with a single battery pack, the CK:670 can power the instrument for 7 days whereas the CK:680 can provide power for 6 days. Adding a further battery pack doubles the operating life and external power can be added if required.
Datasheets for the CK:670 and CK:680 contain additional details about these two systems and can be downloaded from the Cirrus website at www.cirrusresearch.co.uk/library
VoiceTag audio recording
Before each measurement is made, you can record a VoiceTag by simply speaking into the microphone. You can record notes about the measurement location, describe what is being measured or simply store information that may be useful at a later date.
AuditStore data verification
AuditStore™ is a new technology that helps you to ensure that your noise measurement data is valid and trustworthy. AuditStore allows the user to verify measurements that have been downloaded to the NoiseTools software against a secure data store within the instrument.
Each time you make a measurement with your optimus, a selection of the overall data is stored into a separate, secure memory that is independent of the main memory card. This data contains essential information about the measurement such as the time, date and duration, the LAeq, Peak(C) and LAFmax, LA10 & LA90 (where available) and the overload indication.
In addition to the noise measurement data, information about the last calibration is also stored. The AuditStore data can be downloaded from the instrument when required and then the measurements can be checked against the AuditStore. The NoiseTools software will check that the measurement information held in the main database and displayed on the screen matches the values within the AuditStore secure memory.
NoiseTools Software
The NoiseTools software package gives you a quick and simple way to download, analyse and report your noise measurement information. The initial summary screen shows you the most commonly used information and, through simple icons, gives you access to the detailed measurement data. You can simply print the summary screen to get a quick measurement report.
For advanced users, each and every function measured by the instrument is available for review and analysis and the data can be exported for further use. VoiceTag audio recordings can be played back for reference and are automatically stored with the measurement data. Where Octave Band data is available, this information can be used by the program to calculate the level of protection from a range of hearing defenders and ear plugs.
To help you keep your noise measurement data organised and easy to find, NoiseTools allows each measurement to be allocated to people, places and projects. Measurements can be sorted or grouped by any parameter, person, place or project and measurement reports created quickly and easily.
NoiseTools is supplied free from any licensing restrictions or limits allowing you to install the program on as many PC’s as needed at no additional cost.
The optimus green sound level meters have been designed to be a complete solution for both environmental and occupational noise measurements.
Environmental Noise Measurements
- Environmental noise impact assessments over short or long periods
- Environmental noise monitoring outdoors with remote data download over 3G/GPRS & GPS location
- Boundary noise measurements & impact assessments
- Measurements to BS 4142, ISO 1996, Section 61 Notices
- Tonal analysis using to ISO 1996-2:2007 & Cirrus Improved Method
- Detailed analysis using audio recording
Occupational Noise Measurements
- Occupational & Industrial Hygiene Noise Evaluations
- Hearing Protector Selection using HML or 1:1 Octave Band Methods
- Workplace noise measurements to ISO9612
Simple Noise Measurements
- Noise Ordinance & Community Noise Assessments
- General Noise Measurements
Environmental Noise Measurements
For environmental noise applications, an optimus green is the ideal instrument.
Comprehensive measurement capability
The overall Leq, Lmax and statistical Ln% values are measured along with a range of noise profiles providing a complete picture of the noise under investigation.
Real-time 1:3 Octave Bands
The B & C variants will measure and store Real-Time 1:3 octave bands from 6.3Hz to 20kHz throughout each and every measurement, with the overall value along with a time history stored automatically.
Acoustic Fingerprint triggers and audio recording
As well as the VoiceTag recording, the optimus green instruments provide audio recording during measurements using the Acoustic Fingerprint technology.
Recordings can be started either manually or automatically when user defined triggers are activated.
Audio recordings can be stored either as Studio 96/32 quality which can be used for later analysis, or as Standard 16/16 quality which can be used for replay and source identification.
Tonal noise detection
The D variants use either the ISO 1996-2:2007 Simplified Method or the Cirrus improved method to highlight tonal noise in 1:3 octave bands.
Repeating measurements
Measurements can be either started manually or automatically by the measurement control functions.
This allows the instruments to make repeated measurements over long periods of time, ideal when the instrument is used with an outdoor noise measurement kit.
Occupational Noise & Industrial Hygiene Measurements
As well as the environmental noise functions, the optimus green instruments also provide a complete range of occupational noise functions.
OSHA, MSHA & other regulations
If you need to meet regulations such as OSHA HC & NC, MSHA HC or ACGIH, the two “virtual” noise meters in the Dose View can be quickly configured to provide you with this information.
Octave Band Filters for Noise Control & Selecting Hearing Protection
The optimus green A, B & C variants also feature real-time 1:1 octave band filters which can be used to aid in the selection of PPE and for noise control applications.
Instrument Versions
The optimus green range comprises the 0, A, B and C , each of which can be specified as either a Class 1 or Class 2 instrument.
All of the instruments can measure Sound Level functions plus Lmax and Lmin with all frequency and time weightings.
- The 0 versions measure the Integrated noise levels such as Leq and LAE, C-A, Peak Sound Pressure and the virtual noise meters for OSHA/MSHA/ACGIH and include data logging, Ln values and Audio Recording
- The A versions add Real Time 1:1 Octave Band Filters to the functions of the 0 versions
- The B versions add Real Time 1:3 Octave Band Filters to the functions of the A versions
- The C variants add Tonal Noise Detection
Here are the currently available versions of the optimus green sound level meter:
- CR:1720 Class 2 Integrating Data Logging Sound Level Meter with Audio Recording
- CR:1710 Class 1 Integrating Data Logging Sound Level Meter with Audio Recording
- CR:172A Class 2 Integrating Data Logging Sound Level Meter with 1:1 Octave Band Filters and Audio Recording
- CR:171A Class 2 Integrating Data Logging Sound Level Meter with 1:1 Octave Band Filters and Audio Recording
- CR:172B Class 2 Integrating Data Logging Sound Level Meter with 1:1 & 1:3 Octave Band Filters and Audio Recording
- CR:171B Class 2 Integrating Data Logging Sound Level Meter with 1:1 & 1:3 Octave Band Filters and Audio Recording
- CR:172C Class 2 Integrating Data Logging Sound Level Meter with 1:1 & 1:3 Octave Band Filters, Tonal Noise Detection and Audio Recording
- CR:171C Class 2 Integrating Data Logging Sound Level Meter with 1:1 & 1:3 Octave Band Filters, Tonal Noise Detection and Audio Recording
Measurement Kits
Complete measurement kits are available for the optimus instruments which contain the instrument, an acoustic calibrator, windscreen, cables, batteries and accessories. The measurement kits contain all of the accessories needed to carry out a noise survey.
The optimus sound level meter measurement kits contain the following components:
- optimus Sound Level Meter
- CR:514 Class 2 or CR:515 Class 1 Acoustic Calibrator
- UA:237 90mm Windshield
- CK:300 Carrying Case
- User Manual & Certificates of Calibration
- USB Data/Power Cable & NoiseTools Software CD (Requires B or C Version to download measurements)
The specifications for the optimus greensound level meters are quite long and detailed. This information is available either on the product datasheet or from your local distributor. If you would like a more detailed specification, please contact us and we will be pleased to help.
Listed below is a summary of the main specification points for the optimus red sound level meters.
Applicable Standards
IEC 61672-1:2002 Class 1 or Class 2 Group X
IEC 60651:2001 Type 1 I or Type 2 I
IEC 60804:2000 Type 1 or Type 2
IEC 61252:1993 Personal Sound Exposure Meters
ANSI S1.4 -1983 (R2006), ANSI S1.43 – 1997 (R2007)
ANSI S1.25:1991
1:1 & 1:3 Octave Band Filters to IEC 61260 & ANSI S1.11-2004
Total Measurement Range:
20dB to 140dB RMS Single Range
Noise Floor: <18dB(A) Class 1, <21dB(A) Class 2
Frequency Weightings
RMS & Peak : A, C, & Z Measured Simultaneously
1:1 Octave Bands:
31.5Hz to 16kHz
1:3 Octave Bands:
6.3Hz to 20kHz (Bands from 12.5Hz displayed, 6.3Hz, 8Hz & 10Hz stored & downloaded) – B & C variants
Additional Metrics:
LAeq LF (20Hz to 200Hz) & Leq LF (20Hz to 200Hz)
Time Weightings
Fast, Slow & Impulse Measured Simultaneously
Display
High resolution OLED display.
Ambient light sensor & illuminated keypad
Memory
4GB (32GB factory fit option)
AuditStore
Measurement verification data stored in secure memory
Time History Data Rates (Global settings)
10ms, 62.5ms, 125ms, 250ms, 1/2 sec, 1 sec, 2 sec (User selectable)
VoiceTag Audio Recording
Up to 30 seconds of audio notes with each measurement
Integrators
Three simultaneous “virtual” noise meters. Integrator 1 is preset to Q3 for Leq functions. Integrators 2 & 3 can be configured with the following:
Exchange Rate: 3, 4 or 5 dB
Threshold: 70dB to 120dB (1 dB steps)
Time Weighting:None or Slow
Criterion Level: 70dB to 120dB (1 dB steps)
Criterion Time: 1 to 12 hours in 1 hour steps
Integrator Quick settings
EU, OSHA HC & OSHA NC, OSHA HC & ACGIH,
MSHA HC & MSHA EC, Custom 1 & Custom 2
Acoustic Fingerprint Audio Recording
Off, Manual, Threshold Triggered, Advanced Trigger
User options:
Studio Quality – 96kHz/32bit WAV format
Standard quality – 16kHz/16bit WAV format
Pre-Trigger function
Ln Statistical Values
14 independent statistical Ln values calculated from 1/16th LAF
7 preset to L1.0, L5.0, L10.0, L50.0, L90.0, L95.0 & L99.0
7 user defined Ln values
CR:172C & CR:171C allow for an additional 14 Ln values with independent time and frequency weighting.
Measurement Control
Measurement control with user selectable duration of manual, 1 min, 5 min, 10 min, 15 min, 30 mins, 1 hour, Lden
Automatic Synchronisation & Repeat
Pause
Back Erase with user selectable duration
Dimensions
Size: 283mm x 65mm x 30mm
Weight: 300gms/10oz
Batteries
4 x AA Alkaline
Battery life
Typically 12 hours with Alkaline AA
Typically 20 hours with Lithium AA Non-Rechargeable
Battery life is dependent upon the battery type and quality & screen brightness
Language options
English, French, German, Spanish as standard
Other language options may be available
Software Support
NoiseTools Download, Configuration & Analysis software supplied as standard. Compatible with Microsoft Windows XP, Vista & 7 (32bit & 64bit)
Measurement Functions
CR:1720 & CR:1710
LXY, LXYMax, LXYMin
LXeq, LCPeak, LZPeak, LAPeak LCeq-LAeq, LXE, LAIeq
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
14 Statistical Ln% Values
Stored Functions
LXYMax & Time History of LXYMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
Ln Values: 14 independent statistical values
Audio recording during measurement
Time, date & duration of measurement
CR:172A & CR:171A
LXY, LXYMax, LXYMin
LXeq, LCPeak, LZPeak, LAPeak LCeq-LAeq, LXE, LAIeq
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
Real-Time 1:1 Octave Bands (Graphical & Numeric)
NR & NC values & curves
14 Statistical Ln% Values
Stored Functions
LXYMax & Time History of LXYMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
1:1 Octave Bands: Overall Leq & Leq Time History for each band, NR & NC values & curves
Ln Values: 14 independent statistical values
Audio recording during measurement
Time, date & duration of measurement
CR:172B & CR:171B
LXY, LXYMax, LXYMin
LXeq, LCPeak, LZPeak, LAPeak LCeq-LAeq, LXE, LAIeq
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
Real-Time 1:1 Octave Bands (Graphical & Numeric)
Real-Time 1:3 Octave Bands (Graphical & Numeric)
NR & NC values & curves
Leq LF (20Hz to 200Hz)
14 Statistical Ln% Values
Stored Functions
LXYMax & Time History of LXYMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
1:1 & 1:3 Octave Bands: Overall Leq & Leq Time History for each band
NR & NC values & curves
Ln Values: 14 independent statistical values
Audio recording during measurement
Time, date & duration of measurement
CR:172C & CR:171C
LXY, LXYMax, LXYMin
LXeq, LCPeak, LZPeak, LAPeak LCeq-LAeq, LXE, LAIeq
Graph of Short LAeq, LCPeak
Measurement Run Time
Integrators 2 & 3: TWA, Dose %, Est Dose %
Real-Time 1:1 Octave Bands (Graphical & Numeric)
Real-Time 1:3 Octave Bands (Graphical & Numeric)
Tonal Noise Detection in 1:3 Octave Bands
NR & NC values & curves
Leq LF (20Hz to 200Hz)
Up to 28 Statistical Ln% Values
Stored Functions
LXYMax & Time History of LXYMax
LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq
Integrators 2 & 3: LAVG , TWA. % Dose
Time History of LAVG
1:1 & 1:3 Octave Bands: Overall Leq & Leq Time History for each band
Tonal Noise Detection in 1:3 Octave Bands
NR & NC values & curves
Ln Values: 28 independent statistical values
Audio recording during measurement
Time, date & duration of measurement
where x=A ,C ,Z; y= F, S, I
CR:171B Class 1 Environmental Noise Meter 
