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Cirrus Optimus Green

Environmental Sound Level Meter

Why Choose the Optimus Green

  • Compliant to IEC 61672-1:2013 & IEC 61672-1:2002

  • Type Approved to IEC 61672-1:2013 (Class 1 Instruments)

  • Type Approved to IEC 61672-1:2002 (Class 1 Instruments)

  • Backed by our 15 Year "No Quibble" Warranty for your peace of mind

  • High Performance to Class 1 or Class 2 Standard

  • Quick, simple and easy to operate

  • Simultaneous measurement and data logging of all available parameters

  • Measures Fast, Slow & Impulse Time Weightings

  • dB(A), dB(C) and dB(Z) Frequency Weightings included

  • Real-time 1:1 & 1:3 Octave Band Filters

  • Tonal noise analysis

  • VoiceTagTM voice note recording

  • AuditStoreTM measurement verification

  • Acoustic FingerprintTM audio triggering, recording & alerts during measurements for replay and analysis

  • Compatible with CK:670 & CK:680 environmental noise monitoring kits for a total environmental noise monitoring solution

Noise at Work

UK & EU Noise at Work Regulations

If you are working to the UK Control of Noise at Work Regulations or the EU Physical Agents (Noise) Directive, the Leq View gives you the information that you need.

The LAeq and LCPeak values are measured at the same time which allow the LEP,d (LEX,8h) and the Peak Action Levels to be determined.

The LCeq-LAeq (C-A) value is also measured which can be used to select PPE using the HML method. LAE is also measured along with LZPeak for regulations that use this rather than LCPeak.

 

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.

The Quick Setup gives access to a number of preset functions including OSHA HC & NC, OSHA HC & ACGIH and MSHA HC & EC.

The custom settings can be used to choose any other setup or configuration that you may need. Once you've chosen the setup needed it will be stored so each time you use the meter you will have the information you need.

For the two "virtual" noise meters, the LAVG, TWA, % Dose and Estimated % Dose are displayed.

 

Octave Band Filters for Noise Control & Selecting Hearing Protection

The A,B and C instruments also feature real-time octave band filters which will measure the noise in 10 different frequency bands.

The octave band measurement is made at the same time as the other measurements and includes the overall level in each band along with a time history of the bands across the measurement period.

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NR & NC values & curves on screen

The D variants add NR & NC values and curves to the 1:1 octave band measurements. This information can be useful in checking the performance of HVAC systems and noise levels in rooms.

Data Download

We'll include our NoiseTools noise analysis software with all versions of the Optimus Green, so you can keep a store and analyse your measurements.

You can upgrade this instrument to a more advanced version of the Optimus Green at any time, future-proofing your investment.

Overview

A Total Solution for Occupational and Environmental Noise MeasurementsOptimus Green Sound Level Meters

Do you need an all-in-one solution for your noise measurements? The Optimus Green gives you all the noise data you could possibly need for both environmental and occupational noise.By measuring every parameter you need simultaneously, the Optimus Green records everything in one measurement. There's no risk of choosing the wrong function or missing any data. All you need to do to get going is switch on, calibrate and start. It's that simple. All of your measurement data displays on the large OLED screen. You'll be able to see straight away if there are any noise issues that need further investigation. You can easily navigate screens during measurements to see the data you need.

Whether it's environmental noise monitoring, detailed noise analysis using audio recording or workplace noise measurements, the Optimus Green has you covered.

  • Class 1 & Class 2 to IEC 61672-1:2013 & IEC 61672-1:2002

  • Type Approved to IEC 61672-1:2013 (Class 1 Instruments)

  • Type Approved to IEC 61672-1:2002 (Class 1 Instruments)

  • Includes everything you need for environmental and occupational noise measurements

  • Measures everything you need simultaneously to save time

  • No complicated setup - just switch on, calibrate and start

  • Large OLED display so you easily read data on the go

  • Lightweight, ergonomic design for ease of use

  • High Performance guaranteed

Environmental Noise Measurements

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.

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Real-time 1:3 Octave Bands

The B & C versions of the Optimus Green Sound Level Meter provide real time 1:3 octave band filters from 6.3Hz to 20kHz with the overall data stored alongside the time history or noise profile for each band.

 

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 (96kHz/32bit) quality which can be used for later analysis, or as Standard (16khz/16bit) quality which can be used for replay and source identification.

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Tonal noise detection

The D variants use either the ISO1996-2:2007 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.

 

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.

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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

Full Specification

Applicable Standards

IEC 61672-1:2013 Class 1 or Class 2

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 Octave Band Filters to IEC 61260 & ANSI S1.11-2004 (C & D variants)

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Microphone

Class 1 MK:224 pre-polarized, Class 2 MK:216 pre-polarized

 

Microphone Preamplifier

MV:200 Removable Preamplifier (All versions)

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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

Frequency Bands: 10 Octave Bands (31.5Hz to 16kHz, C & D variants)

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Time Weightings

Fast, Slow & Impulse Measured Simultaneously

 

Display

High resolution OLED display. Ambient light sensor & illuminated keypad

 

Memory

4GB (B, C & D Versions), 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 (B, C & D Versions)

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

 

Measurement control

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, quality & screen brightness

 

Connections

USB Type B to PC

AC & DC Output via ZL:174 (2 x Phono, 1m)

Multi-pin IO for external power via ZL:171 cable (2.1mm socket)

External Power: 5v-15v via MultiIO socket via ZL:171 cable (2.1mm socket)

 

Tripod Mount

1/4" Whitworth socket

 

Case

Material: High Impact ABS-PC with soft touch back & keypad

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Environmental

Temperature: Operating -10°C to +50°C, Storage -20°C to +60°C

Humidity: Up to 95% RH Non Condensing

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Electromagnetic performance

IEC 61672-1:2002 & IEC 61672-2:2003

Except where modified by EN 61000-6-1:2007 & EN 61000-6-1:2007

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Language options

English, French, German, Spanish. Other language options may be available

 

Software Support

NoiseTools Download, Configuration & Analysis software supplied as standard. Compatible with Microsoft Windows XP, Vista, 7 & 8 (32bit & 64bit)

 

Measurement Functions

CR:162A & CR:161A

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LZPeak, LCeq-LAeq, LXE

Graph of Short LAeq, LCPeak

Integrators 2 & 3: TWA, Dose%, Est Dose%v

Measurement Run Time

 

CR:162B & CR:161B

Displayed Functions

LXY, LXYMax, LXYMin,,LXeq, LCPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

 

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

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CR:162C & CR:161C

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

Real-Time Octave Band Filters

 

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

Octave Bands: Overall Leq & Leq Time History for each band

Measurement Run Time

Time & Date of Measurement Start

 

CR:162D & CR:161D

Displayed Functions

LXY, LXYMax, LXYMin, LXeq, LCPeak, LZPeak, LCeq-LAeq, LXE, LAIeq

Graph of Short LAeq, LCPeak

Measurement Run Time

Integrators 2 & 3: TWA, Dose%, Est Dose%

Real-Time Octave Band Filters

NR & NC values & curves

 

Stored Functions

LXYMax & Time History of LXYMax

LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak

Time History of LAeq, LCeq, LZeq, LCPeak, LZPeak, LAPeak, LAIeq

Integrators 2 & 3: LAVG , TWA. %Dose

Time History of LAVG

Octave Bands: Overall Leq & Leq Time History for each band

NR & NC values & curves

Measurement Run Time

Time & Date of Measurement Start

where x=A ,C ,Z; y= F, S, I

Other functions may calculated by the NoiseTools software and displayed on download.

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