The use of calibrators date back to those days when it was easier to design a stable calibrator than a stable sound level meter. National and/or international standards applicable in your country may impose restrictions on which instrument types you may use for a given measurement task. It only takes a matter of seconds for the field calibration to be completed, so you’re not going to lose hours of your day completing this step either. (e in b)&&0=b[e].o&&a.height>=b[e].m)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b}var C="";u("pagespeed.CriticalImages.getBeaconData",function(){return C});u("pagespeed.CriticalImages.Run",function(b,c,a,d,e,f){var r=new y(b,c,a,e,f);x=r;d&&w(function(){window.setTimeout(function(){A(r)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','https://www.norsonic.asia/to-calibrate-or-not-and-how-often/','82dtZm2p5Q',true,false,'IkF-BMoVhHw'); Fortunately, this is no longer the case, sound level meters are as stable as calibrators. Most sound level meter users know they must calibrate their sound level meters but a question I get asked frequently is “how often?” Here’s my best practice advice so you can calibrate with confidence. ":"&")+"url="+encodeURIComponent(b)),f.setRequestHeader("Content-Type","application/x-www-form-urlencoded"),f.send(a))}}}function B(){var b={},c;c=document.getElementsByTagName("IMG");if(!c.length)return{};var a=c[0];if(! This involves sending your sound level meter and Acoustic Calibrator back to the original manufacturer for them to calibrate and verify the instruments. Post was not sent - check your email addresses! This means that their performance will degrade over time and your data can become unreliable. Think of it like an MOT & Service for your car. A lower number indicate better quality and accuracy. Some noise measurement instruments require specialist tools or software and these are often not found outside of the manufacturer or a few, specialised calibration laboratories. The frequency that you should calibrate your pH meter depends on many factors such as the type of your test samples, performance of electrodes, and the requirement of the accuracy. If you have any questions about the calibration of your equipment, please contact us and we will be pleased to help. Instrument Classes Hence they are vulnerable and easily subject to damage unless great care is taken. Home > Safety & Environmental Help and Guidance > Noise at Work Assessments > How to Calibrate a Sound Level Meter. There are two ways of calibrating, both of which are important to ensuring the accuracy of your sound level meter. A sound calibrator is designed to produce a known exact and stable sound pressure level. Some Regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the Acoustic Calibrator every year. 11th February 2013; Noise at Work, Noise Measurement, Sound Level Meters; A Sound Level Meter with Calibrator. It only takes a matter of seconds for the field calibration to be completed, so you’re not going to lose hours of your day completing this step either. The cost of recalibration by the manufacturer will vary dependent on who you choose. Before we go into how often you should be calibrating, I just want to quickly recap what we mean by sound level meter calibration. The procedure of making your sound level meter measure correctly is called calibration. After purchasing your sound level meter kit, field calibration won’t cost you anything as the Acoustic Calibrator should be already supplied. The Norsonic Calibration Laboratory Asia can do this for you — even if your sound measuring equipment is not manufactured by us! Download the Noise Measurement Terminology Guide to expand your noise knowledge and make measuring noise simpler. The cost of recalibration by the manufacturer will vary dependent on who you choose. For sound measurements, calibration is no less than paramount since sometimes legal action will be taken based on the sound and noise levels measured! (function(){for(var g="function"==typeof Object.defineProperties?Object.defineProperty:function(b,c,a){if(a.get||a.set)throw new TypeError("ES3 does not support getters and setters. Any damage may not be immediately obvious and so using an Acoustic Calibrator before you make any measurements helps to check that the instrument will measure correctly. Recalibration essentially checks all of these components and that the performance of the equipment is the same as when it was manufactured. If it’s field calibration, before and after each measurement. Filters, where used, should conform to BS EN 61260, Class 1, and sound calibrators to BS EN 60942, Class 1.”. The sound level meter is then said to be calibrated (for a particular measurement). Some Regulations (like the 2005 Control of Noise at Work Regulations) state that a sound level meter should be returned every two years and the Acoustic Calibrator every year. Answering this question is both easy and a not so easy, dependant on a few factors. An Acoustic Calibrator being used on an Optimus Sound Level Meter. //