Rotary gas flowmeter | When measuring gas with a rotary flowmeter, if the gas is directly discharged into the atmosphere at the outlet of the flowmeter, it should be ..

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1. How to adjust gas flow meter

The adjustment method of gas flow meter needs to be selected according to the specific type of operation.

1. Adjustment of rotor flow indicator 1 Manual valve adjustment: Adjust the valve opening by rotating the valve handwheel. Rotate clockwise to decrease the opening (decrease flow rate), and counterclockwise to increase the opening (increase flow rate). During operation, it is necessary to adjust and observe the position of the float scale inside the glass tube to ensure the accuracy of the adjustment. 2. Installation and calibration: The instrument must be installed vertically, and tilting it more than 5 ° will cause the float to rub against the tube wall, resulting in indication errors. When installing, the valve should be fully opened first to flush out impurities in the pipeline, and then slowly adjusted to the target flow rate.

2. Vortex flowmeter regulation 1 Electronic parameter setting: Long press the SET key on the meter head to enter the parameter setting mode, press the up and down keys to adjust the K coefficient (instrument calibration coefficient), and the flow range can be modified in the F-MAX submenu. For example, the maximum flow rate of DN50 pipe diameter is usually set at 100m ³/h, which can be adjusted to the actual demand of 80m ³/h

2. Pipeline pressure difference control: For self regulating type, pressure is balanced through a three valve group. First, fully open the bypass valve, then gradually open the upstream and downstream shut-off valves, and finally close the bypass valve to achieve detailed control.

III. Adjustment of Thermal Gas Mass Flow Meter 1 Zero point calibration of Jianchang: In the absence of flow, enter the

"ZERO ADJUST" menu through the touch screen, long press the confirm button for 3 seconds to complete the zero point calibration. It is recommended to perform once a month to avoid temperature drift. 2. Range setting: Use a dedicated communication cable to connect to the RS485 interface and modify the range parameters in the supporting software. When measuring oxygen flow rate, select O ₂ in the gas attribute column and enter the current temperature and pressure parameters, and the system will automatically convert the standard flow rate. After adjustment, it is recommended to observe 2-3 usage cycles and compare the actual requirements of the process equipment with the difference in flow meter readings. For application scenarios that require an accuracy of over 1%, it is recommended to regularly use a standard orifice flow calibration device for online verification. Some intelligent models support PID regulation function, which can achieve closed-loop automatic control by setting proportional band and integration time parameters.

2. Working principle of gas rotor flowmeter

The working principle of gas rotor flowmeter is that when gas flows through a vertical conical tube from bottom to top, it will push a freely suspended rotor (or float) inside the tube to rise.

. After reaching an equilibrium position, the rotor comes to a standstill, and the lift of the gas on the rotor is exactly equal to its gravity. By reading the corresponding position of the rotor on the scale of the conical tube, the instantaneous flow rate value of the gas can be directly obtained. 1. The core workflow is based on the principle of variable area measurement: - Gas enters from the bottom of the flowmeter, passes through the annu

Rotary gas flowmeter | When measuring gas with a rotary flowmeter, if the gas is directly discharged into the atmosphere at the outlet of the flowmeter, it should be ..

1. How to adjust gas flow meter

2. Working principle of gas rotor flowmeter

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