System Description
Brief Description
The detector can simultaneously display one kind of numerical indicators of the gas. The index of gas to be detected exceeds or falls below the set standard, the instrument will automatically conduct a series of alarm action, flashing lights, vibration and sound. The detector has two buttons, a LCD display associated an alarm devices (an alarm light, a buzzer and vibration), and a micro USB interface can be charged by a micro USB; additionally, you can connect the serial extension cable through an adapter plug (TTL to USB)to communicate with a computer, calibration, set the alarm parameters and read alarm history. The detector has real-time storage to record real-time alarm status and time. Specific instructions please refer to the following description. 2.1Button function The instrument has two buttons, function as shown in table 3:| Button | Function |
|
| Turn on, turn off, please press the button above 3S View parameters, please click Enter the selected function |
 | Silence Turn on pump, turn off pump, please press the button above 3S. Enter the menu and confirm the set value, at the same time, please press the button and button. The menu selection button, press thebutton to enter the function |
 |  |
| Gas Detector | USB Charger |
| Gas | Gas name | Technical index | ||
| Measurement range | Resolution | Alarm point | ||
| CO | Carbon monoxide | 0-2000pm | 1ppm | 50ppm |
| H2S | Hydrogen sulfide | 0-100ppm | 1ppm | 10ppm |
| EX | Combustible gas | 0-100%LEL | 1%LEL | 25%LEL |
| O2 | Oxygen | 0-30%vol | 0.1%vol | Low 18%vol High 23%vol |
| H2 | Hydrogen | 0-1000pm | 1ppm | 35ppm |
| CL2 | Chlorine | 0-20ppm | 1ppm | 2ppm |
| NO | Nitric oxide | 0-200pm | 1ppm | 35ppm |
| SO2 | Sulfur dioxide | 0-100ppm | 1ppm | 5ppm |
| O3 | Ozone | 0-50ppm | 1ppm | 2ppm |
| NO2 | Nitrogen dioxide | 0-20ppm | 1ppm | 5ppm |
| NH3 | Ammonia | 0-200ppm | 1ppm | 35ppm |
Precautions
1. Be sure to avoid a long charge. When charging, please make the instrument in the off state, you can make the charging time reduce, and then charging in the on state, the instrument's sensor may be subject to the difference between the charger (or charging environment differences), in severe cases, the instrument may appear displaying the value that is not accurate or even in the alarm situation. 2. Instrument in the power is turned off after the automatic shutdown, the normal charging time of 3 to 6 hours or so, try not to make the instrument charge in more than 6 hours to protect the battery part of the effective life of the battery. 3. After the instrument is fully charged, the continuous working time is related to the opening and alarm of the pump. (Due to open the pump, the alarm when the flash, vibration, sound need additional power consumption, has been alarm state, working time down to the original 1/2 to 1/3). 4. Always use the instrument in a corrosive environment. 5. Be sure to avoid contact with the instrument. 6. It is advisable to unplug the power cord for a long time, or to charge the battery once every 1 to 2 months to protect the battery's normal life. 7. If you use the process, the crash or can not boot, in the back of the instrument below a small hole, with the top of the needle, you can. 8. Please be sure that the gas indicators are normal in the case of boot, after the start of the instrument after the initialization is completed to bring the place to detect the gas. 9. To use the record storage function, it is best to start the device after the initialization is not completed before entering the menu calibration time to prevent the time to read the record chaos. Otherwise there is no need to correct the time.Display Turn on the device by long press the right key in the case of normal gas indicators, shown in FIG.1:
Figure 1 Boot display
This interface waits for the instrument parameters stable. The scroll bar indicates the waiting time, about 50s. X% is the current schedule. The lower left corner is the current time of the device which can be set in menu. The icon
indicates the alarm status (it turns into
when alarm). The icon in the rightmost indicates the current battery charge. Below the display are two buttons, you can open/close the detector, and enter the menu to change the system time. Specific operations can be referring to the following menu settings. When the percentage turns into 100%, the instrument enters the monitor gas display. Take an example of EX, like Figure 2:
FIG.2 Monitor Gas Display Interface
When gas has exceeded the target, alarm type(carbon monoxide, hydrogen sulfide, combustible gas alarm type is one or two, while the oxygen alarm type for the upper or lower limit) will display in front of the unit, the backlight lights, LED flashing and with vibration, the speaker icon disappears slash, shown in FIG.3.
FIG.3 Gas Alarm Interface
2.3.1 Set time In the main menu interface, press the left button elect system setting, press right button enter the system setting list, left button elect time setting, press right button enter the time setting interface, like FIG.7:The icon refers the time to adjust, press right button to select the function, shown in FIG.8, then press the left button down to change the data. Press the Left key to select another time adjustment function.2.3.4 Alarm store In the main menu, select 'record' function on the left, then right click to enter the recording menu, as shown in figure 11. ★ Save Num: total number of storage equipment storage alarm record. ★ Fold Num: the amount of data storage equipment if it is larger than the memory total will start back from the first data coverage, the coverage of the times said. ★ Now Num: current data storage number, shown has been saved to No. 326.
2.3.5 Set alarm data In the main menu, press the left button to select the "Set alarm data" function, then press the right button to enter the alarm set gas selection interface, as shown in figure 13.Here in the case of Combustible gas.In Figure 13 the interface, press the left button to select the 'level' carbon monoxide alarm value setting, and then press the right button to enter the settings menu, as shown in Figure 14, then press the left button to switch the data, click the right button flashing through the numerical value plus one, about key settings required, after setting up the press and hold the left right click button, enter the alarm value to confirm the numerical interface, then press the left button, set up after the success of the middle position of the bottom of the screen display, and 'success' tips' fail', as shown in figure 15. Note: set the alarm value must be less than the default value (lower limit of oxygen must be greater than the default value), otherwise it will fail.
FIG.14 alarm value confirmation
Zero calibration Step1: The position of 'System Settings' menu that indicated by the arrow key is to select the function. Press left key to select ' equipment calibration ' feature items. Then right key to enter the password input calibration menu, shown in Figure 16.According to the last row of icons indicate the interface, left key to switch data bits, right key to plus a flashing digit at the current value. Enter the password 111111 through the coordinate of the two keys. Then hold down the left key, right key, the interface switches to the calibration selection interface, as shown in Figure 17.
FIG.16 Password Enter
Step2: Press the left button to select 'Zero Calibration ' feature items, then press the right menu to enter the zero point calibration, after determining the current gas is 0ppm, press the left button to confirm, after the calibration of is successful, the bottom line in the middle will show 'calibration of success' on the contrary displayed as shown in 'calibration of Failed', shown in Figure 18.Step 2: Select 'Gas Calibration' feature items, press the right key to enter Calibration value interface, then set the concentration of standard gas through the left and right key, suppose now that calibration is combustible gas, the concentration of Calibration gas concentration is 60%LEL,at this time set to '0060 'can be. As shown in Figure19.Step3: After zero calibration is complete, press the right to return to the calibration of selection screen, at this time you can choose gas calibration, press the menu one level exit detection interface, there may also be in the countdown screen, do not press any key when time is reduced to 0 automatically exit the menu, Back to the gas detector interface. Gas calibration Step1: After the gas to be stable display value, enter the main menu, call up the Calibration menu selection. The specific methods of operation like the step one of cleared calibration.
FIG. 13Alarm data setting
FIG.15 Set successfully
FIG.17 Calibration choice
Figure18 Calibration choice
Press mute button, Alarm sound is cleared, the icon turn into alarm status. 2. Gas Parameter Display Interface In the gas detector interface, press the power button, and enter the gas parameter display interface, like FIG.4.
FIG.6 main menu
FIG.4 EX Parameter
FIG.7 time setting menu
FIG 8 Regulation time
Function Description: ★ Year: setting range 17 to 27. ★ Month: setting range 01 to 12. ★ Day: setting range is from 01 to 31. ★ Hour: setting range 00 to 23. ★ Minute: setting range 00 to 59. ★ Back to return to the main menu.2.3.6 Equipment Calibration Note: The device is turned on only after the initialization of zero calibration and calibration of gas, when the device is correcting, the correction must be zero, then calibration of the ventilation.Step3: After setting the calibration, holding down the left button and right button, change the interface to the gas calibration interface, as shown in Figure 20,this interface has a current value detected gas concentration. when the countdown goes to 10, you can press left button to manual calibration, after the 10S, the gas automatic calibrates, after the Calibration is successful, the interface displays' Calibration success! 'On the contrary Show' Calibration Failed! '.The display format shown in Figure 21.
FIG 20 Calibration Interface
FIG 21 Calibration results
Step4: After Calibration is successful, the value of the gas if the display is not stable, You can select 'rescaled', if the calibration fails, check the calibration gas concentration and calibration settings are the same or not. After calibration of the gas is complete, press the right to return to the gas detection interface. 2.3.7 Shut Down In the menu list, press the left button to select ' Shut Down', press the right button to make sure the device turns off. It also can display in the concentration of interface, long press the right button for more than 3 seconds to shut down the device. 2.3.8 Return In the main menu interface, press the left button to select 'Back', and then press the right button to return to the previous menu.1. Gas display interface: Show: gas type, gas concentration, unit, status. Show in FIG. 2.Display, it means the pump is open, if the is not display, it means the pump is not open.
FIG.5 Key Explain
2.3.2 Set the Pump Speed In the system setting list, left button elect pump speed setting, press right button enter the pump speed setting interface, like FIG.9: Press left button elect pump speed, press right button confirm setting back to parent menu.
FIG9 Pump Speed Setting
2.3.3 Pump Switch In the system setting list, left button elect pump switch, press right button enter the pump switch setting interface, like FIG.10: Press right button to open or close pump, press left button to back, press right button back to parent menu. Open or close pump also can in concentration display interface, press left button more than 3 seconds.
FIG10 Pump Switch Setting
Figure 11: alarm records count
Figure 12 alarm records
To display the latest record, check a record on the left, click the right button to return to the main menu, as shown in figure 6.Figure19 Set the concentration of standard gas
Show: gas type, alarm status, time, first lever alarm value (upper limit alarm), second level alarm value (lower limit alarm), range, current gas concentration value, unit. Press the button below "next" (namely left), display button instruction like FIG.5, press the button below “Back”, the display interface switch to the real-time monitor gas display interface.2.3 Menu Description To enter the menu, you must hold down the left first and then right-click, release the left button, whatever the display interface. Menu interface shown in FIG. 6:The icon refers to the current selected function, press the left select other functions, and press the right key to enter the function. Function description: ★ System Set: include set the time, pump speed and the air pump switch ★ Turn off: turn off the instrument ★ Alarm store: View the alarm record ★ Set alarm data: Set the alarm value, low alarm value and high alarm value ★ Equipment cal: Zero correction and calibration equipment ★ Back: back to detect four kinds of gases display.