Cirrus is now able to offer a UKAS calibration service for your sound level meter and acoustic calibrator, even if it is not a Cirrus instrument!

UKAS Calibration of Sound Level Meters

We can now offer this service, not only on our own sound level meters such as the optimus and the CR:800 instruments, but also on products from other manufacturers such as B&K, CEL Casella, Rion, Norsonic, Larson Davis, 01dB, Quest, Svantek and TES.

We can offer UKAS or Traceable Calibration to BS 7580 on wide range of sound level meters as well as UKAS Calibration on a smaller number of instruments to BS EN 61672 Part 3. Continue reading »

Cirrus Research, specialists in the design and manufacture of noise monitoring equipment, is pleased to announce the opening of its new Spanish office.

Cirrus Research S.L., based in Barcelona, will provide sales, marketing and support activities for Cirrus Research plc’s noise measurement instruments in the Spanish market.

Silvia Anguera - Sales Support Administrator, Cirrus Research S.L.

Silvia Anguera - Sales Support Administrator, Cirrus Research S.L.

Silvia Anguera, the latest member of staff to join the Cirrus team,  has been appointed as Sales Support Administrator for the new Cirrus Research office in Barcelona and will be the first point of contact for our customers in Spain. Continue reading »

Some older Cirrus sound level meters and doseBadge Reader units that had an RS232 data output were supplied with a converter to allow the instruments to be used with a USB connection. This converter is the Sunix UTS1009B.

The drivers supplied with this converter were compatible with Windows XP. If you have upgraded your PC to Windows Vista or Windows 7, these drivers may not be compatible. If you reinstall the software onto your new PC from the original CD, the older drivers will be installed and you may find that the software cannot connect to your instrument. Continue reading »

A Class 1 Sound Level Meter is a noise measurement instrument that meets the requirements of IEC 61672-1:2002 (or an equivalent such as BS EN 61672-1:2003) to Class 1 performance.

Tolerances & Accuracy

This standard specifies two levels of performance, Class 1 and Class 2, with Class 1 being effectively more accurate. Within the standard are a set of performance criteria that an instrument must meet and each of these has a tolerance associated with it. The tolerances for Class 1 are tighter than for Class 2. For example, at the reference frequency of 1kHz, the tolerance limits for Class 1 are +/- 1.9dB and for Class 2 the tolerance is +/- 2.2dB. Continue reading »

15 Year Warranty from Cirrus Research plc

15 Year Warranty from Cirrus Research plc

For over 40 years specialist noise measurement equipment manufacturer, Cirrus Research, has been designing, manufacturing and providing ongoing support for its high quality noise measurement instruments.

Cirrus Research offers its customers a full support package for each of its products, including a newly extended 15 year warranty, continued customer support and free expert advice. Continue reading »

We’ve covered the differences between Class and Type in sound level meter standards in a previous post and so in this post we’ll cover the differences between a Class 1 and a Class 2 sound level meter.

The standards that we work to, such as IEC 61672-1:2002 or BS EN 61672-1:2003, define a wide range of performance criteria that the instrument must meet. These criteria are often quite technically complex and detailed and have tolerances associated with them. In the current standard, IEC 61672-1:2002, there are two levels of tolerance and these are known as Class 1 and Class 2. Continue reading »

15 Year Warranty for Cirrus Noise Measurement EquipmentCirrus Research is delighted to announce that it is now able to offer a 15 year warranty on its noise measurement equipment including its award winning Optimus Green sound level meter.

The reliability and strength of Cirrus Research products is such that the company is providing this new extended warranty to any acoustic instrument manufactured by Cirrus Research from 1st September 2011 onwards.

Under the terms of the new scheme, Cirrus Research’s standard two year warranty can now be extended by a further 13 years at no additional cost; that is provided the instrument is routinely verified by Cirrus Research every year. The warranty covers all faults on the instrument, as well as minor accidental damage, excluding the microphone. Continue reading »

For over 40 years specialist noise measurement equipment manufacturer, Cirrus Research, has been designing, manufacturing and providing ongoing support for its high quality noise measurement instruments in the UK.

Over the past decades, a flurry of companies have opted to lower their costs by relocating manufacturing activity overseas, however, Cirrus Research has resisted this trend and instead opted to remain loyal to Britain.

Daren Wallis, Managing Director of Cirrus Research comments: “Manufacturing is at the heart of the UK economic recovery and initiatives such as the UK business secretary Vince Cable’s ‘Made by Britain’ highlights British manufacturing and design ingenuity. Britain was known as the design and manufacturing capital of the world and this accolade is returning to the country.  The reality is that Britain is ripe with technological innovation and home grown talent.”

In Vince Cable’s speech at the beginning of the year, he highlighted that the UK remains the world’s sixth biggest manufacturer — a fact which still surprises people when they hear it1.  Therefore the quality, variety and ingenuity of UK manufacturing is something that needs to be highlighted throughout the UK and beyond. Continue reading »

In my 10 years experience as an Export Sales Manager, I am often approached for a Sound level meter with little additional information as to the intended use of the instrument.

Sound level meters come in a range of different configurations which lend themselves to different applications.

When enquiring to purchase a sound level meter the most important piece of information you can give Cirrus Research is the intended application.

Less experienced customers look towards Cirrus Research to recommend an instrument and without intended application information it is difficult to make such suggestions.

Therefore the most important question you can answer is why do you want to make measurements? Continue reading »

The sound level meters and noise dosemeters that Cirrus manufactures are designed to meet the performance criteria laid down in various standards.

For example, the optimus sound level meters are designed to meet the requirements of BS EN 61672-1:2003 which is also known as IEC 61672-1:2002.

Within these standards there are many different performance criteria that the instrument must meet along with tolerances that are allowed. It may not be possible for the instrument to meet the exact requirements all of these criteria but as long as it is within the tolerances that is acceptable. Continue reading »

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