Creating Safe Business Environments™   

Optimus Yellow

The Optimus Yellow (CR150) is a professional grade sound level meter, calibrated for noise measurements that must meet the relevant international standards. Despite being a powerful meter it is extremely easy to use, ensuring you get the correct measurements right from the start.

• IEC 61672 Class 1 or Class 2
• ANSI S1.4, IEC 60651, IEC 60804 Type 1 or Type 2
• Hi-res colour OLED display for clear readings
• Single span 20 to 140 dB
• Voice tag recording of comments
• 12 year warranty

Applications

• Basic noise surveys
• Noise ordinance enforcement
• Fire alarm testing
• Machinery maintenance and trouble-shooting

The Optimus range of sound level meters uses the latest display technology and digital signal processing (DSP) techniques to provide you with a very powerful yet easy to use meter. The ease of use comes from the fact that all parameters are automatically measured at the same time, so no need to think about what you need in the split second before starting the measurement.

Making Noise Measurements

Making measurements usually consists of checking the calibration (adjustments are automatic), recording a voice tag if required*, and then taking the readings.

If the data logging option is fitted then all the measurement parameters are stored, along with time, date and other relevant information.

• Measures all parameters at the same time:
  • Fast, Slow, and Impulse time weightings
  • A, C and Z frequency weightings
  • Maximum (Lmax) and Minimum (Lmin) for all of above
• Data logging versions also store:
  • Max sound level (Lmax) with:
    • A, C, Z frequency weightings
    • Fast, Slow, Impulse response
  • Time History (see below)
  • Date, Time and run time

One of this meter's most useful features is its ability to measure all the noise parameters at the same time. When the time comes to make a measurement, you have no doubts about whether you have made the correct settings.

Most noise measurement regulations will clearly state the parameters that should be measured. For most, this will include the "A" weighted Sound Level, with a time response of either Fast or Slow. To keep things clear, the meter shows only the most commonly used parameters on the screen.

The display on the left shows the current Fast Sound Level (LAF) as a large number. Below that are the maximum (LAFmax) and the minimum (LAFmin) and the measurement time.

The bar on the left shows the current sound level. It can be set to change colour when preset levels have been exceeded.

Data Logging Options - Parameters Stored

The display shows the commonly used parameters, but with the Data Logging option fitted the meter stores the maximum sound levels for all time and frequency weightings, along with a time history for the more common ones.

Summary Store

The overall parameters for the noise measurement are stored for all frequency and time weightings.

Time History Store

The meter can be set to store time history measurements at one of a number of rates between 10ms and 2 seconds. Four maximum sound level (Lmax) values are stored for each sample: LAFmax, LASmax, LCFmax, LCSmax.

Voice Tag

Before starting a measurement, the meter will ask if you want to record a "Voice Tag". The meter will record any speech or the noise in question (to help you identify it later) for up to 30 seconds. This audio is transferred to the software automatically along with the measurement.

You can skip this stage if you don't need a voice tag, or the option can be disabled altogether.

Using Your Optimus Yellow Sound Level Meter

The Optimus range of sound level meters have a single measurement span and measure all the noise parameters at the same time. This means that you do not have to think about a range setting (there isn't one) or which measurements you need first. Just switch on and make the measurement.

Power Up

The meter takes just four AA batteries (included), which should last at least 16 hours - that's a lot of noise measurements.

Start the Measurement

Press the Start button to begin the noise measurement. Once running, the meter will show the current sound level along with the maximum and minimum levels. Other parameters can be viewed (such as "C" weighted and "Z" weighted levels) by using the up and down arrow keys. If you have the data logging option then the meter is already storing measurements.

 

Stop the Measurement

The end the measurement process, press the Stop button. The display will show the most common measurement parameters: Maximum Sound Level and Minimum Sound Level with the usual "A" weighting applied. Using the up and down keys, you can also view the "C" and "Z" weighted values.

If you have the data logging option installed then the measurement is automatically stored at this point.

Download the Optimus Yellow Datasheet (PDF, 390k)

Contact Midas

Midas Safety Services are happy to discuss your Sound and Noise Level Testing requirements and arrange a no-obligation meeting if that would be helpful.

Please contact us on 01454-632967 or email chrisgray@midaselectronics.co.uk.