有毒有害气体检测安全技术

1、 1 %vollfl%vollel%lfl%lel%lfl / lellfl / lelufl%ufl%ufl / uel?2 132?%137172.410.422.831182.814.432.5811947544.15520211.651625211.344612.574.522211.57312.5231.98.58314241.69.3916.7252.29.5103.132262.410.3113.815.42713.514.512422281.37.11310.717.4295.314143100304.920.7152.121.5313.42716614324.345lelue

2、l210%vol20%vol?3 ? 1%lel%vollellel1001lel = 100%lel100%lel = 5.3%vol10%lel = 0.53%vol0.53%2%volppmppb1ppm = 1000ppb =1/1000000vol10-6100%vol = 106ppm = 109ppb10%lel = 0.53%vol = 53000ppm10%lel = 0.13%vol = 13000ppmidhl500ppm3ppmmg/m3vppm= wmg/m324.46 / mvppmwmg/m3m4vnlelnuelnlel = 100 /v1/lel1 + v2/

3、lel2 + +vn/leln%voluel = 100 /v1/uel1 + v2/uel2 + +vn/ueln%vol80%vollel=5.315%vollel=3.04%vollel=2.21%vollel=1.9lel= 100 /805.3 + 15/3.0 + 4/2.2 + 1/1.9= 4.46%vol?4 iecgb3836.14-2000140? 1? 2? 012nec120?iec 01nec 1iec 2nec 2?iecnecclass 0div. 112div. 2class/10div. 12div. 2ieczonenecdivision?4 123iai

4、biaia100maibib150maia01ib1 5 ?1dgb3836.2zone1zone22egb3836.3zone1zone23iagb3836.4zone02ibgb3836.44pgb3836.5zone1zone25ogb3836.6zone1zone26qgb3836.7zone1zone27ngb3836.8zone28mgb3836.9zone1zone29hgb3836.10zone1zone2?6 ?mj0.280a0.180b0.060c0.019? ?7 1exiact6? exiaia0cct685? ?exiac? exiaia0cc2exdexibexiaexdibexdiaexeexeib? niosh?m%m%1.520.54.06.52.020.05.04.03.014.0?12.23m35%234?lel33121?ppmppm050011500010015000200.11500250110000501200010011000100.130voc050000.1-voclel100%lel?1234lel1.3%lel2.8lel30%lel10%lel=10%1.3%2.8=36400ppmidhl500pmm70lel