『On site flow meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. The flowmeter has signal lines and power lines, so the two lines coming from the site should enter the safety barrier on the intrinsic safety side ..
The power supply part of the four wire flowmeter cannot meet the intrinsic safety standard because it is damaged due to its energy exceeding the limit. Therefore, the power supply part is treated according to explosion-proof standards. The other parts of the flowmeter can be treated according to explosion-proof or intrinsic safety standards. The signal line should be connected to the intrinsic safety side of the safety barrier. This is because signal lines transmit weak electrical signals rather than high-energy electricity. The power cord is directly connected to the power source or distribution grid because it transmits high-energy electricity. It should be emphasized here that the intrinsic safety side of the safety barrier is used to handle signal lines, not power lines. This is because the signal line transmits low-energy signals and does not cause explosions. The power line transmits high-energy electricity and is directly connected to the power source or distribution grid to ensure the normal operation of the flowmeter. Overall, in the design of a four wire flowmeter, the signal line and power line serve different functions. Signal lines are used to transmit weak electrical signals, while power lines are used to transmit high-energy electricity. This design can meet the functional requirements of the flowmeter and ensure its safe operation in hazardous environments. It is worth noting that in practical applications, the signal line and power line of the four wire flowmeter should be respectively connected to the corresponding side of the safety barrier.
2. What is the reason why the pointer of the oil phase flow meter of the on-site mixed emulsion truck jumps normally but does not display the flow rate ..
The pointer of the oil phase flow meter of the on-site mixed emulsion vehicle jumps normally but does not display the flow rate, which may be caused by sensor failure, wiring problem, display screen failure, flow meter module failure, signal line connection problem, or central control setting problem. It needs to be gradually investigated. 1. Sensor malfunction: The flowmeter sensor is the core component responsible for converting fluid flow signals into electrical signals. If the sensor is damaged or its performance deteriorates (such as internal component aging, moisture, or mechanical impact), it may cause abnormal signal output. At this point, the pointer may still bounce due to the inertia of the mechanical structure, but the actual flow data cannot be collected correctly, resulting in no numerical display. Professional equipment is required to detect the sensor output signal and confirm whether it is within the normal range. 2. Poor or loose wiring is a common fault point. If there is virtual c
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