When the flow rate of the measured medium in the target flowmeter pipeline is zero, the instantaneous value of the flowmeter indication is not zero. The main reasons for this phenomenon are: a. The flowmeter levelness is inconsistent before and after installation, as well as the target and target rod Tilting to produce axial horizontal component causes instantaneous flow; b. The flowmeter is operated for a long time, and the sensor internal stress release is slightly changed; c. During installation or operation, serious overload causes zero drift; The above three methods can refer to The process and method of flow meter zeroing are handled. d, poor flowmeter housing ground; treatment method: the user re-grounded. e. Stuck between the target, target, and gauge with debris; Processing method: Close the valve before and after the flowmeter, use a tool to loosen the connecting bolt between the over-flow component of the flowmeter and the measuring tube, and gently shake the transition After the parts are removed or cleaned, they can be reset as they are.
The target flowmeter shows an abnormal increase in the value during operation. The main causes of this phenomenon are: a. Filaments and ribbons are hung on the target plate and the target rod. Processing method: Refer to the method of handling the impurities. b. Under high knot conditions, the target and target rods are heavily knotted, so that the projected area of ​​the force element target plate along the axis of the measuring tube increases, that is, the annular overcurrent area between the target and the measuring tube decreases, and thus the same. Under the flow, the force of the sensor increases, eventually resulting in an abnormal increase in the flow indication; Treatment method: remove the transition part, and use the tool to remove the target piece and the target rod and the dirt on the inner wall of the measurement tube.
The measurement error is large and there are many reasons for this phenomenon. The main reasons are as follows: a. The relative concentricity of the flow meter and the connecting pipe is greatly misaligned during installation, and the sealing gasket is not concentric, thus forming a throttling resistor. , greatly affect the measured medium flow state; processing method: adjust the installation status. b. The straight section of the flowmeter is too short before and after the flowmeter. The elbow is directly installed in front of the flowmeter. The valve greatly interferes with the flow component of the medium to be measured. Processing method: Install according to the instructions or carry out flow calibration on the flowmeter in the field. . c. Bypass pipe leakage; Treatment method: Check and replace the bypass pipe. d. Wrapped ribbons around the target sheet increase the force on the target. Processing method: Refer to the method of handling the impurities in the previous method.
The target flow meter has no indication or no signal, the main causes are the following four: a, poor power contact or fall off; processing method: for the flowmeter with its own battery, check whether the battery is stable, the contact is good, And whether the battery has electricity. For an external power supply, check that the connections between the connection wires are intact, the wires are conducting, and the external power supply is normal. b, flowmeter circuit damage; processing methods: return to factory repairs. c, display damage; processing method: return to the factory to replace. d, user signal receiving system failure; processing methods: check, troubleshooting.
The value of the flowmeter has always been zero during operation. The main reasons for this phenomenon are: a. The force element (target piece) falls off, causing the sensor to feel insensitive; Processing method: assembling the same size target plate. b, flowmeter sensor no voltage output signal; processing method: first determine whether the sensor is damaged, the specific method is to see whether the sensor data changes. c. The flow of the measured medium is too small, which is lower than the minimum flow rate of the flowmeter. Processing method: Replace the force element after returning to the factory.
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