BST-MG7 Multi-gas Detecting Alarm Manual Instruction
1. Application This BST-MG7 multi gas detecting alarm is applied to underground coal mine, petrochemical industry, municipal, environmental protection and other spaces where multi gas may exist.this device can be used for detecting methane () or combustible gas (), oxygen (), carbon monoxide () and hydrogen sulfide () gases simultaneously. When the concentration of any gas in the environment is higher or lower than that of set alarm point, this device with send out both sound and light alarms to warn users who wears it to take protective actions. This device is portable and can be also used as a fixed device. It s anti-explosion and intrinsically safe, the anti-explosion sign is ExibΙ 2. Working principle In this device, the methane/combustible gas sensor adopts hot catalytic working principle and it consists of black and white elements inside. The black element is the catalytic carrier of methane/combustible gas, and will occur thermal catalytic reaction with the methane/ gas to change its own resistance value; the white element is a pure carrier and its resistance value is very stable. According to this sensor s characteristics, the signal is enlarged by the wheatstone bridge and displays the value, thus concentration detection methane/ combustible gas is achieved. 3. Charging this device Notice: To charge the battery, ensure you are in a safe, non-hazardous area. Input voltage: 1-24V, 5-6Hz Output voltage: 5V, 5mA. It can be charged from 5V USB socket through connecting USB cord with this device. USB socket could from computer, phone adapter, power station, etc. After connecting USB cord with this device, green LED flashing indicates regularly charging. When green LED stops flashing and remains light, it indicates charging is basically completed, to enlarge battery life, please don t unplug charging device right away, instead remain it on charge for another hour. 1 < > The sensor, sensor and sensor all adopt electrochemical principle. The inside electrode will react with the being detected gases in the role of catalyst to achieve the directional movement of electron between electrodes, and make the electrical signal amplified and displayed by amplifying circuit technology and other existing technologies so that to achieve the detection of concentration.
4. The drawing sketches for all components of this device. -6 5. Technical specification: ( 1ppm=1X ) Technical specification Detecting gas Measurement range Measurement error Respond time Resolution Alarm point (.~5.)%Vol Parameter / Item 1 2 3 4 5 6 7 8 9 11 12 13 Description face cover alarm light front cover lcd usb port buttons buzzer calibration mask knob screw back cover lable (.~ ) % ±.% ( ~3. ) % true value ±% ( 3.~5. ) % ±.3% 2S ( T9 ).1%vol %vol can be adjusted in whole range 2 optional clip optional
Technical specification Measurement range Measurement error Respond time Resolution Alarm point Measurement range Measurement error Respond time Resolution Alarm point Measurement range Measurement error Respond time Resolution Low Alarm point High alarm point Measurement range Measurement error Respond time ( ~ ) % ( 1 ~ 2 ) ±2% ( 6 ~ ) % ±6% 2S ( T9 ) 1% Parameter 2% can be adjusted in whole range ( ~ ppm ( ~2 ) ppm ±2ppm ( >2~ )ppm ±4ppm (> ~5 )ppm true value ±5% ( >5~) %ppm true value ±6% 45S ( T9 ) 1ppm 24ppm can be adjusted in whole range. ~ 3. %vol (.~5. ) %vol ±.5%vol ( >5.~3. )%vol.9%vol 35S ( T9 ).1%vol 18.%vol can be adjusted in whole range 25.%vol can be adjusted in whole range ( ~ )ppm ( ~5 ) ppm ±3ppm ( >5~ )ppm True value ±% 45S ( T9 ) ( 2 ~ 6 ) % true value ±2% 3
Technical specification Resolution Alarm point Alarm sound intensity Alarm way Alarm indicator light Sensor life Working current Continuous operating hours Battery item Battery circuit current Charging time Protection level Working temperature Size Sound, light alarm Parameter 1ppm ppm can be adjusted in whole range 85dB at 1m audible Can be visible in the distance of not less 2m 95mA 13hours 3.7V/15mA 2A 6. Detecting operation Button introduction Button 2year(,, ) 1year( ) 4-5hours IP65-25 ~55 ; time for -4 ~55 13 66 3 mm On/ off button Description start this device or shut it down, please yes button OK (change between detecting and alarm point ) up button down button set the data value set the data value 4
On/ off operation In the state of closing, the on/off button to open this device, display our company s logo BESANTEK, then change into the alarm. point display,and at last, go into the normal detecting. Long on/off button to shut down this device in the state of running The switch operation BESANTEK BESANTEK [L] [% ] [L] 18. 24 2 18. 24 9 : 3 9 : 3 [% ]. 2.9 213.2.18 2.9 213.2.18 Detection Funcion 9 : 3 9 : 3.5 2.9 213.2.18 [% ] 2.9 213.2.18 9 : 3 9 : 3.5 2.9 213.2.18 [% ] 2.9 213.2.18 Funcion Zero setting Zero.5 2.9 [% ] 2.9 5
Funcion Alarm point Alarm setting [% VOL ] 18. 24 [% ] 2 18. 24 Funcion Time setting Time Year: 213 Month Day Hour Min 2 18 9 3 Funcion Calibration setting Calibration [% VOL ] [% ]. 2.9 2.9 Funcion Setting Setting 6
The of Zero setting operation In zero setting, up/down button to select gas which need to do zero setting. Selected gas name will turn green and OK button, the background of selected gas will turn red, OK button again to finish this operation with display of Set OK. [% ].5 2.9 1 2.9 [% VOL ] [% ].5 2.9 [% ]. 2.9 2.9 [ ] % VOL.5 2.9.5 2.9 Set OK. [% ] 2.9 2.9 [% ] 2.9 Set OK. Short on/off button to exit zero setting operation.5 2.9.5 2.9.5 2.9.5 2.9 7
Short on/off button to cancel the selected gas zero setting operation. 2 2 [% ] [% ] [% ] 2 2.9 2.9 2.9 Notice: The oxygen gas zero setting must use %VOL nitrogen gas For other gases it should be carried out in clean air. Alarm point setting operation [% ] 2 2.9 In alarm point setting, up/down button to select gas name, selected gas name will turn green and OK button, the background of selected gas will turn red. Press up/down button to adjust the value, after finishing the adjusting, OK button to complete this operation with display of Set OK Short on/off button to exit alarm point set operation. For example: [L] 18. 24 2.9 25 2.9 24 2.9 25 Set OK. 2.9 24 2.9 25 8
Time setting operation In time setting, OK button to select year, month and date options, it turns green after being selected. Press up/down button to adjust the value and OK button to complete this operation with display of Set OK Short on/off button to return function. Year: 213 Month Day Hour Min 2 18 9 3 OK button Year: 213 Month Day Hour Min 2 18 9 3 Year: 213 Month Day Hour Min 3 18 9 3 Year: 213 Month Day Hour Min 3 18 9 3 Year: 213 Month Day Hour Set OK. 3 18 Calibration setting operation In calibration setting, up/down to select gas name, selected gas name will turn green and OK button, the background of selected gas will turn red. After the value is stable up/down button to adjust the display value and make it same with standard gas concentration value. Long OK button to complete this operation with display of Set OK Short on/off button to exit this operation. For example:. 2.9. 2.9 5. 2.9.5 2.9 5 Set OK.. 2.9. 2.9 5 ( standard gas concentration is 5ppm) 9
Notice: Calibration gas must be standard gas. This device must do zero setting operation before calibration operation. Make sure the flow is stable before connecting calibration gas with this device. The calibration couldn t be done when this device is alarming for low power Before calibration, open this device for at least 6 minutes and allow it to run stably. Calibration gas flow for methane, combustible gas, carbon monoxide and oxygen is 3ml/min, it s 4ml/min for hydrogen sulphide. Suggested calibration gas concentrations are: Methane: %vol; combustible gas: 2%; : 5ppm; : 5ppm. Oxygen can be calibrated in clean air. Setting operation In setting, user can choose between methane gas () and combustible gas () according to practical necessity. Press up/down button to select and confirm by long OK button. A tick icon shows the operation completed. on/off button Short on/off button to return function.
7. Attentions of using this device Battery of this device shouldn t be removed in underground places, and DO NOT use different batteries from standard one. Charge this device in ground and safe places. The removable catalytic component must be provided by BESANTEK Corporation. 8. Storage and maintenance Notice: when maintain this device, Please don t change any component s parameter, specification and model when maintain this device This device should be kept by special person, and build a registration system This device should be stored in dry and well ventilated places if it s not used for a long time. DO NOT disassemble this device at will, it must be repaired by specialists. 9. Trouble shooting If this device couldn t be turned on, maybe it has no power, please charge it firstly. If the value of this device is not zero in clean air, please carry on zero setting firstly. except Oxygen If this device couldn t test accurately, please carry on calibration firstly. If this device becomes expired, please purchase a new one. 11