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Kay		#1 Posted : 20 August 2010 12:28:45(UTC)
Rank: Forum user		Hi All I have a picture of a label on our light units and I need to know what it means. it is an 'E' which looks a bit like the 'Ex' denoting explosion protective equipment, but the 'x' isn't there, and it's shown next to the Lwa (Sound Power level) and CE mark. I can email the picture if required. Can anyone clarify what it means? Thanks! Kay
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MaxPayne		#2 Posted : 20 August 2010 13:15:01(UTC)
Rank: Super forum user		I can't imagine the piece of equipment you mention but the CHIP abbreviation for something physiochemical that is or maybe explosive is an E. http://www.hse.gov.uk/chip/phrases.htm#abbrev
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descarte8		#3 Posted : 20 August 2010 13:20:12(UTC)
Rank: Super forum user		I have a feeling it may be denoting the intrinsic safety. Best talking to who supplied it if purchased or on hire.
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Kay		#4 Posted : 20 August 2010 13:28:03(UTC)
Rank: Forum user		Hi, To clarify, the equipment is a mobile lighting tower - A diesel engine with wheels plus a mast with lights on the top. We use them for illuminating outdoor night work. Not sure where we got them, they were second hand but I guess I could try down that route. Thanks
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GordonP		#5 Posted : 20 August 2010 14:18:02(UTC)
Rank: Forum user		Hi Kay, Thanks for the email, will ask around my esteemed colleagues. In the meantime, I've posted the image to: http://www.flickr.com/ph...tphotography/4909793929/ if anyone else wants to have a look. Gordon
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grim72		#6 Posted : 20 August 2010 14:49:01(UTC)
Rank: Super forum user		It certainly looks like the old Explosive symbol without the x. The only other thing I thought it might relate to was 'electrical field strength'.
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paul.skyrme		#7 Posted : 20 August 2010 20:08:06(UTC)
Rank: Super forum user		The rest of the label is to do with the noise level of the machine in use according to an EU std, 91 dB, I would guess it is "similar" to the use of the CE mark, but relating to the EU std noise test for construction plant etc,
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Alan Haynes		#8 Posted : 20 August 2010 21:23:01(UTC)
Rank: Super forum user		Perhaps its the following;- Illuminance E symbol Unit of measure: Lux (lx) Illuminance (usually “E” in formulas) indicates the amount of luminous flux from a light source falling on a given surface. It is the quotient of the luminous flux divided by the area of the surface. Because illuminance is relatively easy to measure or calculate, it is frequently used in planning. Illuminance does not provide clear conclusions about subjective brightness.
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paul.skyrme		#9 Posted : 20 August 2010 22:11:24(UTC)
Rank: Super forum user		Don't think so Alan, but I may be wrong, the remainded of the label is definitely noise related for contruction plant and machinery noise levels in use. It is also on my petrol lawn mower. I always thought the LWA was for linear weighted average, noise measurement, but, noise is not my specialist area.
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Ron Hunter		#10 Posted : 21 August 2010 00:04:03(UTC)
Rank: Super forum user		This perhaps? http://www.tuv.com/uk/en...b_assemblies_e_mark.html
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paul.skyrme		#11 Posted : 21 August 2010 10:33:33(UTC)
Rank: Super forum user		ron, I think this is to do with road going vehicles only as it is for type testing. Plant would not be type tested in the same manner so would not carry the same mark. I have tried to find this symbol and failed! I have seen it loads of times and not given it a 2nd thought. I now however think that the LWA refers to "linear weighted dB(A)" not the exactly correct terminology I know.
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barnaby		#12 Posted : 21 August 2010 22:47:59(UTC)
Rank: Guest		The sign can be found in The Construction Plant and Equipment (Harmonization of Noise Emission Standards) (Amendment) Regulations 1989; see illustration on page 2: http://www.opsi.gov.uk/s...9/Uksi_19891127_en_1.htm These were revoked by: http://www.legislation.g.../2001/1701/contents/made so presumably the ‘Epsilon’ sybol was replaced by the pictogram here: http://www.legislation.g...001/1701/schedule/7/made

paul.skyrme		#13 Posted : 22 August 2010 08:20:33(UTC)
Rank: Super forum user		barnaby, Well done! Thinking about it, I knew it was a noise thing, perhaps the epsilon symbol stood for emissivity, which is sometimes the case, just in this situation it was related to the noise emissions! I have never noticed the new symbol, mind I have not been up close to any new engine powered construction plant recently!
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Kay		#14 Posted : 23 August 2010 17:16:57(UTC)
Rank: Forum user		Thanks Barnaby & everyone who had a go. That's great - this forum is brilliant! I hope I'll be able to solve a problem like that for someone else sometime. Cheers!
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