Guizhou and Ningxia CCHG1000 cheap direct reading instrument measuring dust explosion

CCHG1000 economical direct-reading instrument measuring dust proof I. Overview: CCHG1000 direct reading instrument measuring dust is infrared light absorption principle method for measuring instrument ambient concentrations of dust floating in the air. The instrument is based on the separation MT163-1997 and Q / 320581FYK007 direct-reading dust concentration measuring instrument> corporate standards and GB3836.4-2000 standard ExibI rating (intrinsically safe) proof design dust concentration measurement, the instrument separation breathing apparatus Efficiency is fully consistent with internationally recognized "BMRC" profile requirements, accurate and timely reflection of who inhaled dust respirable dust pollution of different quality and workplace dust in the dust, and to provide reliable data to accurately evaluate the health status of the workplace, the instrument is suitable for coal mine and other workplace also gas explosion hazard. The instrument is compact, simple to operate, load, high vacuum capability, automatic timed sampling, flow stability, the whole Chinese liquid crystal display, easy to carry and so on. Second, the main technical indicators: 1, the dust concentration measurement range: 0.1mg / m3--1000 mg / m3 2, dust measurement relative error: ± 20% 3, stability relative error: ± 2.5% 4, the sampling range: Breathing dust, full of dust 5, sampling flow rate: 2.0L / min 6, sampling flow error: ≤2.5% 7, sampling flow stability: ≤ ± 5% 8, sampling Performance: meet the "BMRC" sampling effectiveness curve 9, power supply : 2.5A / h, section 6 using Ni-H batteries, series three current limiting resistor 0.51Ω / 10W, with the epoxy potting placed in the battery case after rated voltage U 7.2V; its maximum output voltage U 8.4V; maximum output current: 4.6A. 10, the working voltage: 6.5V ~ 8.4V Dc (intrinsically safe) 11, explosion-proof type: Mine intrinsically safe, explosion-proof mark ExibI 12, Dimensions: 280 × 228 × 80 (mm) 13, Weight: 3.05kg three structural characteristics: CCHG1000 direct-reading dust concentration measuring instrument by a liquid crystal display, sampling head (including total dust and respirable dust sampling head sampling head), the detection device, pump components, intrinsically safe power supply, microprocessor control circuit, flow meter components. Four instrument shape structure works: setting the required sampling time, will put away the membrane filter is inserted into the clip detection means, by the detection system within the device blank filters were measured to obtain a first light voltage value After starting the instrument starts sampling, the sampling time after the detection means to adopt a dust filter for the second measurement, get a second light voltage value, and finally data is processed by the microcontroller and calculate the dust concentration is displayed on the screen on, and automatically stores the data down.