2Principle

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

3Main functions

3.1Automatic 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.

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

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

3.4One machine, three uses: One use: touch screen operation, convenient, fast, and accurate preparation of 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.

3.5Gas usage: The prepared standard gas can be used directly or filled into a gas bag for remote use.

3.6 The portable MF-4C has two power supply modes: AC and DC. It is compact in size and can be used both indoors and on site, making it particularly suitable for calibrating fixed gas meters on site.

3.7The two gas paths can be freely exchanged for use, expanding the dilution factor.

3.8The viewing angle of the touch screen can be adjusted freely within the range of 0-90 degrees.

4Main purpose

4.1This device provides a standard device for establishing measurement standards for gas analyzers, combustible gases, toxic and harmful gases, and other instruments in various industries such as metrology, environmental protection, petrochemicals, medicine and health, disease control centers, coal mines, etc. It prepares standard gases for the calibration, calibration, and testing of the above-mentioned instruments;

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

4.3Used for the calibration and performance evaluation of sulfur hexafluoride leak detectors and purity meters in the energy sector to prepare standard gases;

4.4Used for the calibration and performance evaluation of methane testers, carbon monoxide and oxygen testers in coal mines, and preparing standard gases for calibration and verification.

4.5Reference standards used for various gas analysis methods.

5Technical indicators

5.1The conventional dilution ratio is 500:1, with two MFCs;

5.2Regular outputFlow range: （200～2000）ml/minThe flow range and maximum dilution ratio can be designed and assembled according to user requirements:

5.3Traffic repeatability: ≤ 0.2%

5.4Flow linear error: ≤ ±0.3%

5.5Gas distribution uncertainty:≤0.5%

5.6Preheating time: 30 minutes

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

5.8Instrument power supply: 220VAC

5.9Operating environment: 0 ℃~45 ℃

5.10 300mmWidth x 185mm Height x 250mm

5.11 Portable instrument weight: approximately 6kg

5.12The portable dynamic gas distribution device can provide a certificate from the Chinese Academy of Metrology