HAV Management Best Practice vibration HAV Myth Management www.invc.com Industrial Noise and Vibration Centre
Industrial Noise and Vibration Centre • Invited to present on the HSE Road-Shows across the UK to launch the current HAV and noise regulations • The largest HAV database of accurate field values available ▪ virtual assessments as per HSE guidance • Developed and run the IOSH HAV competency courses ▪ the major provider of noise and HAV training in the UK • Developed Croner, 3M, Desoutter … HAV Documentation • HAV-Test tool maintenance system development • Vibration engineering control design and development • Multi-award winning noise control technologies www.invc.com
Vibration Management Programme The objective is to establish and implement "Best Practice" for each of these elements – in your particular circumstances. • Identify potential hazardous tools and operations ▪ list tool types, models, manufacturers + "jobs“ • Assess risks for tools and operations ▪ representative sample + published data • Train managers, supervisors and operators • Implement Risk Reduction Programme ▪ PPE, ergonomics, operating conditions, maintenance, engineering modifications ..... • Buy Smooth ▪ implement vibration purchasing policy • Health Surveillance Programme www.invc.com ▪ where A(8) exposure likely to be > 2.5m/s2) • Audit Programme
Changing Personal Behaviour... VWB… www.invc.com 16m/s 2 : 12 minutes re 2.5m/s 2 ; 48 minutes re 5m/s 2 .
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
"Anti-Vibration" Glove PR ISO 10819:2013(en): Mechanical vibration and shock: measurement and www.invc.com evaluation of the vibration transmissibility of gloves at the palm of the hand. Introduction: “… gloves normally provide little reduction in hand-transmitted vibration at frequencies below 150 Hz …can increase the vibration transmitted to the hands at these low frequencies...”
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
Optimising Tool Maintenance Use HAV-Base statistics to evaluate the effect that maintenance has on the levels of vibration for the various categories of tool and use this information to optimise your tool maintenance. Use operator experience to determine when a tool should go for maintenance – they will know… www.invc.com
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
Vibration Control at Source Mould filling: recommendations based on this video reduced the vibration www.invc.com from 28m/s 2 down to 11.5m/s 2 . Use extended from 15 minutes to 1 hour 28 minutes/day
Commercial Pressure - Low Vibration Plant Design Manufacturers are under increasing pressure to develop low vibration plant. In the case of Dennis, our prototype re-designed low vibration handle reduced www.invc.com operator exposure during simulated cutting from 5 - 6m/s 2 down to 1 - 2m/s 2 without affecting mower control.
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
Measurement and Measurement and Accuracy A(8) Daily Dose Much of the industry has a "risk CoVaWR 2005 m/s 2 measurement" culture, with assessment as an end in itself 5 Exposure Limit Value - ELV rather than as a precursor to the Exposure must be kept below more challenging action to reduce this Limit Value risk. Do not carry out placebo 4 measurements, take action… "If you are paying suppliers or 2.5 Exposure Action Value - EAV consultants to measure your tool Where exposure is likely to vibration every year or two, it's exceed this Action Value:- very good business for them, but completely unnecessary..." Implement a HAV management programme to reduce exposure and risks Provide appropriate health www.invc.com surveillance
Measurement v Virtual Assessment UK HSE Guidance and Recommendations:- • use reliable published field vibration data for risk assessments wherever possible • companies should spend time and resources reducing risk rather than placebo assessments based on re-measuring tools for which accurate field data is already available or reassessing tools or activities for which they already have good data Important Note • It is often only necessary to carry out a full HAV assessment once. Unless you change the tools, the time or the way they are used, there is no need to reassess – just update. This fundamentally affects the economics of purchasing vibration monitoring equipment. e.g. noise assessments have to be reviewed at least every 2 years. www.invc.com Will additional measurements affect your risk reduction actions? http://www.invc.com/noise/vibration/handarm-vibration/#havbase
Template Tool Register Necessary part of best practice + approved tool list… www.invc.com Free open source copy available at www.invc.com/noise/vibration/handarm-vibration/
HAV and Noise Assessment Online Database www.invc.com
www.invc.com
Faulty Measurement Results Manufacturer: 5m/s 2 Consultant (jubilee clip): 5 – 45m/s 2 Meter supplier (tie wrap): 2m/s 2 Many HAV meter users measure by “rote” without taking the necessary steps to ensure that the results 4 operators with HAV symptoms. Help! are accurate. Press the button, write down the result… INVC (band clamp): 1.9 - 5m/s 2 Hand held transducers Transducers strapped on with tape Transducers loosely mounted Transducers at the wrong location One transducer axis dead Why the difference? Cable faults – intermittent readings averaged We traced the problem to a faulty Etc, etc… sensor that mis-read for high frequency vibration but OK for lower www.invc.com amplitude sinusoidal vibration. Field data lower than declared value!
Mis-Measurement None of these alternative measurement techniques can be used for a reliable assessment (re BS5349) of the levels of vibration to which operators are exposed. Period. Very simples… HSE Guidance 2017 “Hand -arm vibration measurements should be made with the transducer firmly attached to the vibrating surface … There is currently no wrist or glove mounted device which measures vibration suitable for use in a vibration risk assessment.” Continuous Monitoring Don’t unless you can prove that the cost is justified, especially on lower risk activities. Assess if circumstances warrant the usefulness of collecting monitoring data re reduced exposure. Will additional measurements affect your risk www.invc.com reduction actions? HAV measurement white paper via www.invc.com/wrist-mounted-vibration-transducers-not-again/
Mis-Measurement None of these alternative measurement techniques can be used for a reliable assessment (re BS5349) of the levels of vibration to which operators are exposed. Period. Very simples… For example… HAVSCo CVK www.invc.com Reactec
Mis-Measurement www.invc.com
Mis-Measurement www.invc.com
Mis-Measurement: ASA Ruling www.invc.com/wrist-mounted-vibration-transducers-not-again/ ASA Ruling: We considered that because we had seen evidence that wrist mounted transducers did not measure hand-arm www.invc.com vibration in accordance with the Standard, did not provide ELV or EAV data that was required by the Regulations and were not therefore suitable for risk assessments of hand-arm vibration as set out by the Regulations… Full ruling at: www.asa.org.uk
The Major Myths • PPE for HAVS an oxymoron • Tool maintenance vibration measurements merit-free measurements • Vibration control at source …is not possible… • Vibration measurement and risk assessment placebo monitoring, mis-measurement and marketing hype... www.invc.com • Buy / hire smooth caveat emptor
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