The system is equipped with built-in lithium battery, which requires no external power supply.Touch screen is adopted for setting. The system supports timing, interval sampling and timing switching between air and exhaust sampling. Air scrubber and exhaust filter are placed outside.The system working mode is divided into waiting mode, air sampling mode, exhaust sampling mode and automatic working mode.(1) standby mode sampling, air sampling mode, exhaust work status table: sampling vacuum pump working mode the 3-way magnet valve (note standby mode OFF OFF air sampling mode OFF ON exhaust gas sampling model ON state table ON (2) automatic mode: process standby mode time air sampling mode sampling time exhaust note workflow T1 T2, T3 units: second explanation: automatic switching system based ON the configuration three work modes T1:System standby time, setting range (0-60,000 seconds);T2: operating time of system air sampling mode, setting range (0-60,000 seconds);T3: system exhaust sampling time working time, setting range (0-60,000 seconds);

3. Technical parameters (1) the system has built-in lithium battery, which supports the system to work continuously for 12 hours;(2) the system adopts 3.5 "touch screen operation;(3) system sampling high-precision rotameter to set the sampling flow;(4) sampling flow accuracy: ≤±3.5%F.S;(5) borosilicate glass, PTFE, 316 stainless steel are used for contacting gas parts;(6) the system supports standby mode, air sampling mode, tail gas sampling mode, and automatic working mode. Each working mode can be switched from time to time automatically.