Gas Cabinet for improving local exhaust ventilation to protect the cylinder (cylinder) is not out of the fire and protect the surrounding cupboard was fire from inside a metal container. Gas Cabinet internal purge systems, alarms and vent, usually with a bottle of bits, two bottles and three bottles bit position. 1. Technical specifications for a single bottle (600 * 450 * 1850), two-bottle (900 * 450 * 1850), three bottles of (1100 * 450 * 1850) 2. Using 1.0mm high-quality cold rolled steel, the surface shall be subject to strict pickling, phosphate treatment, electrostatic spraying epoxy resin further corrosion treatment, resistant to moisture resistant. 3. microcomputer time switch, high-sensitivity detection probe automatic exhaust leak alarm. Control System Description control system is divided into hours key, minutes keys, function keys and the timing of key four buttons. When the device is powered on, the display opened. Time monitor to work 1 hour Key: h key is used to adjust the hour digits, when the key is pressed hour time display starts flashing, then began to enter the hour setting mode, press and hold the hour button, the display set from zero hour to twenty-four do arbitrarily adjust the settings. 2 min key: min key is used to adjust the minute figures, when the monitor is flashing when you press the minute key, time display starts flashing, then began to enter the minutes setting mode, hold down the minute key, display minute set fifty-nine from zero to do any adjustment settings. 3, function keys: Function key primary do three settings. 1, when the fan is turned on to set the alarm time. (0-59 minutes) 2, regular opening day, the fan running time setting (0-59 minutes). ①. Automatic alarm exhaust time setting When you press the function key, the time display part is 1:00 hours, the fan is set to enter alarm state, then the fan running time can be set by the minute key (0-59 minutes ) arbitrarily set. When ②. Automatic daily exhaust time setting when pressing the function key, the time display part of the display is 2 hours, enter the regular opening day, the fan running time adjustment state, then the fan running time can be set with min key (0-59 min at random). ③. Forced ventilation set while holding down the timer button 5-6 seconds, the fan automatically. After 30 minutes automatically turn off this function for the fans enforcement. 4, timer button: Timing key to set the fan is turned on each day. When you press the timer button, time display starts flashing timer lamp is turned on, then you can set a daily fan operation time by hours and minutes button. Timer button is pressed again, the timing light is off, the timing of the display. 5, eliminate the police key: alarm occurs when the device is used to eliminate the alarm button when the alarm occurs when the device, press any button to silence the alarm can be used as a button, the alarm sound stops but the fan continues to run a run time of a user. located on the time .╟ Scope ╣: widely used in major university teaching building, large and small hospitals, enterprises and institutions, pharmaceutical companies and other related biochemical company