Registered Address: Environmental Science and Technology Ltd, 48 Thirkleby Way, York, North Yorkshire, United Kingdom, YO10 3QD. Phone: +44 (0) 1904 373018 Email: info@environst.com 

Company Number: 10773337

VAT Number: 270 6099 96

Cirrus Optimus Red

Advanced Workplace Sound Level Meter

Why Choose the Optimus Red

Data Download

If you choose the data logging version of the Optimus Red, we'll include our NoiseTools noise analysis software so you can keep a record of your measurements. If you choose the Optimus Red with 1:1 Octave Bands, NoiseTools can also recommend hearing protection based on your data.

 

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

Overview

Measuring noise at work doesn't need to be a time-consuming task. The Optimus Red Sound Level Meter uses the very latest digital technology to save you time. By measuring every parameter you need simultaneously, it can record everything in one measurement. There's no concern about 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, so you can see straight away if there are any occupational noise problems in your workplace. You can easily navigate screens to see the data you need during measurements.

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.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

The C & D 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. 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.

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)

Microphone

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

 

Microphone Preamplifier

MV:200 Removable Preamplifier (All versions)

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)

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

Environmental

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

Humidity: Up to 95% RH Non Condensing

Electromagnetic performance

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

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

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

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.