Only when the plug-in gas flowmeter is calibrated can it be used better

Only by calibrating the insertion gas flowmeter can we use it better Gas, hydrogen peroxide and other media. At present, this flowmeter is an instrument that uses the principle of thermal diffusion to measure gas flow. The sensor consists of two reference grade thermal resistors (RTDs). One is a speed sensor RH, and the other is a temperature sensor RMG that measures changes in gas temperature. When these two RTDs are placed in the measured gas, the sensor RH is heated, and the other sensor RMG is used to sense the measured gas temperature. As the gas flow rate increases, the airflow removes more heat and the temperature of the sensor RH decreases. Calibration and adjustment methods of plug-in gas flowmeters: 1. Preparatory work before verification: adding liquid, constant temperature, adjusting the level of the whole machine, adjusting the liquid level, and cleaning the blowpipe. Every step is indispensable. 2. Select the appropriate reading method: For flowmeters with mechanical heads, it is best to use photoelectric conversion for sampling, automatic reading, and automatic detection, otherwise the repeatability of the flowmeter cannot be achieved. 3. After adjusting the out-of-tolerance liquid level, re-inspection is required. How to use: 1. Place the meter on the workbench, adjust the anchor screws to make the water bubble of the level in the center, and keep it for a long time during use. 2. Open the sealing nut of the water level controller and pull out the inner woolen rope. 3. Inject distilled water into the instrument through the socket of the thermometer or pressure gauge, and stop injecting distilled water when the distilled water flows out from the hole of the water level controller. When the excess distilled water flows from the hole of the water level controller along the wool rope It will be clean when one drop flows out in about 5~10 minutes), put the wool rope into the sealing nut of the water level controller, and tighten the sealing nut. 4. Install the thermometer and pressure gauge. (Each cell is 10Pa) 5. Connect the air circuit according to the air inlet and outlet directions, and keep it sealed.

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