Target flow meter
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I rarely work with target flow meters. Today, a target flow meter from Dandong Tongbo had its upstream and downstream shut-off valves closed tightly (with no leaks in those valves), yet there was still a flow rate of 2.4 T, whereas the range of this meter is 0–6 T. This issue wasn’t detected during installation, and no adjustment points could be found on the device. I would appreciate some advice from experts! Thank you!
The target rod is deformed; take it apart, pull out the rod and check it
Oh, I’ll give it a try. I’m mainly not familiar with target flowmeters
Instrument repair rule: tap first, kick second; if that doesn’t work, disassembly is the only option
This one also has small-signal rejection. Check to see if there is any rejection; if not, the circuit board will need to be disassembled to examine the zero-point condition.
Hehe, feel free to ask me any technical questions; we specialize in manufacturing flow meters.
Was it reset during installation? Otherwise, there must be an issue with the markings
If the levelness is not sufficient during initial installation, the alignment target plate and target rod generate axial horizontal forces due to the tilt； With long-term use of the flow meter, stress is generated as a result of stress release within the sensor ； Severe overload during installation or operation causes zero drift. All of these issues can be resolved by resetting the instantaneous flow rate. If it has been running for some time, debris may have gotten stuck between the target plate and the measurement cylinder; remove the target plate and clear the debris. Moisture in the sensor of the flow meter or insufficient insulation strength can also cause this; use a hair dryer to dry the sensor. If that doesn’t work, contact the manufacturer. It depends on the specific circumstances. I guess it’s very likely that the following points will still need to be explained by the original poster. Waiting for a reply once your issue is resolved
Agree with the person above. If there are problems, look for them step by step
I have used their target flow meters; it’s possible that the zero point of the flow meters has shifted, so they need to be taken offline for recalibration