CCHG1000 mine explosion direct reading instrument measuring dust - proof certificate coal safety certification Beijing days 瑞博源 CCHG1000 direct-reading instrument measuring dust concentration is infrared light absorption principle method, an instrument measuring ambient concentrations of dust floating in the air for. The instrument is based on MT163-1997 and Q / 320581FYK007 corporate standards and GB3836.4-2000 standard ExibI rating (intrinsically safe) proof design dust concentration meter main technical indicators: 1. dust concentration measurement range: 0.1mg / m3-- 1000 mg / m3 2. Dust measured relative error: ± 15% 3. stability relative error: ± 2.5% 4. Sampling range: respirable dust, total dust 5. Sample flow: 2.0L / min 6. sampling flow Error: ≤2.5% 7. Sample flow stability: ≤ ± 5% 8. Sampling Effectiveness: meet "BMRC" sampling effectiveness curve 9. Power supply: Ni-H battery 2.5A / h, 6, series 3 0.51Ω / limiting resistor 10W, with the epoxy potting placed after the battery compartment, rated voltage U 7.2V; its maximum output voltage U 8.4V; maximum output current: 4.6A 10. Operating voltage: 6.5V ~ 8.4V Dc (intrinsically safe) 11. proof type: Mine intrinsically safe, explosion-proof mark ExibI 12. Dimensions: 280 × 228 × 80 (mm) 13. Weight: 3.05kg