2. Principle

The gas distribution principle of this device is the mass flow mixing method. By accurate settings, 10 can be configured^－9～10^－2(i.e. ppb)～%Various standard gases with varying concentrations.

3. Main functions

3.1 Automatic Gas Distribution: This device is a computerized intelligent gas distribution system, and all operational functions are displayed on the screenThe touch screen on the device is complete. Simply select and input the name and concentration of the gas to be prepared and diluted on the device screen. By pressing the touch screen a few times, you can prepare and display the accurate and stable standard gas concentration you need in just over 10 seconds.

3.2 Automatic Calibration: Automatically adjust the flow rate and volume based on the properties of different gases and the temperature of the experimental environment.

3.3 Touch operation and screen display: There are 4 page labels below the display screen, which can be accessed by touch to enter the corresponding pageThe page. The top of the display screen shows the year, month, day, instrument name, and time.

3.4 One machine, three uses: One use: convenient, fast, and accurate touch screen operation to prepare standard gases; Second use: According to the required flow rate of the tested instrument (or analytical method), the device controls and divides the flow rate of the prepared standard gas, which is equivalent to adding the required supporting equipment "flow controller" in the gas distribution device; Three uses: The upper right corner of the front panel is equipped with a time display, which can accurately time at any time.

3.5 Use of prepared gas: The prepared standard gas can be used directly or filled into a gas bagOr steel cylinder (note: the function of filling steel cylinders requires additional fees)Use in a different location.

The viewing angle of the touch screen can be adjusted freely within the range of 0-90 degrees.

4. Main purpose

4.1 This device provides a standard device for establishing measurement standards for gas analyzers, combustible gases, toxic and harmful gases, and other instruments used in various industries such as metrology, environmental protection, petrochemicals, medicine and health, disease control centers, and coal mines. Standard gases are prepared for the calibration, calibration, and testing of these instruments;

4.2 Used to evaluate the various performance of gas measuring instruments, measuring instruments, and gas sensors, and to prepare standard gases;

4.3 Preparation of standard gas for the calibration and performance evaluation of sulfur hexafluoride leak detectors in the energy sector;

4.4 Prepare standard gases for the calibration and performance evaluation of methane testers, carbon monoxide and oxygen testers used in coal mines, and calibrate them.

4.5 Reference standards for various gas analysis methods.

5. Technical indicators

5.1 The conventional dilution ratio is 500:1, with two-way MFC flow control;

5.2 Conventional OutputFlow range: (200-2000) ml/min Flow range, maximum dilution factor, etc. can be designed and assembled according to user requirements:

5.3 Traffic repeatability: ≤ 0.2%

5.4 Flow linear error: ≤ ±0.3%

5.5 Gas distribution uncertainty: ≤ 0.5%

5.6 Preheating time: 30 minutes

5.7 Automatic zeroing: Automatically adjust the zero point of MFC after preheating is completed or repeat zeroing from the preheating zeroing page

5.8 Instrument power supply: 220VAC

5.9 Operating environment: 0 ℃~45 ℃

5.10 Dimensions: 400mm wide x 195mm high x 500mm deep

5.11 Instrument weight: approximately 8kg