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| Analysis of common faults of vortex flowmeter |
| 2011-7-29 8:22:00 |
涡街流量计被雷击 1. The vortex flowmeter was struck by lightning
Field instrument damage during lightning storms is a common problem.
Lightning strikes in the transmission line will induce instantaneous high-voltage spikes and strong surge currents to break down or burn out electronic components in the converter. Such lightning strikes are mainly introduced through power lines and signal lines.
涡街流量计检测元件和电子元件的失效 2. Failure of vortex flowmeter detection components and electronic components
After long-term operation, some electronic components may age and fail over time, causing problems with the instrument.
涡街流量计被介质脏污的损伤 3. The vortex flowmeter is damaged by the dirty media
After a long period of work, the fluid viscera remains in the measuring pipe and attaches to the body, thereby changing the geometric parameters of the measuring pipe and the body.
The measurement error of the instrument increases, which reduces the flexibility of the detection components, reduces the signal amplitude, and then causes the failure of the detection components.
涡街流量计被环境中的腐蚀气体损伤 3. The vortex flowmeter is damaged by the corrosive gas in the environment
The long-term corrosion of corrosive gases and moisture in the environment will cause the insulation resistance of the detection element to drop, and the corrosion of local electronic components, wiring terminals, and ground terminals, which will increase the contact resistance of the plug-in and weaken the transmission signal.
18 个月后，仪表输出流量值逐月降落，翻开丈量井，发现检测元件电路板有白斑。 For example, the industrial water of an enterprise in Henan draws raw water from the Yellow River and uses a plug-in vortex flowmeter to measure the flow of water. Since the water pipeline is open, the plug-in vortex flowmeter is installed in the well. Due to the selection criteria, the device is correct. The meter works well, but after 18 months, the output flow value of the meter drops month by month, the measurement well is opened, and the detection element circuit board is found to have white spots.
This may be long-term operation, which is caused by long-term operation in a humid environment. After the circuit board is changed and the instrument maintenance is enhanced, the instrument continues to run well.