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『Vortex flowmeter secondary instrument』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. Wiring Instructions for Vortex Flow Meter
The wiring method for vortex flow meters varies depending on the type of sensor and transmitter. The specific instructions are as follows:
1. Wiring Instructions for Sensor Transmission System: Three wire system, including power supply, wide skin signal, and power ground three wires. Cable requirements: Use a three core shielded cable, with the shielded wire connected to the housing ground at one end of the sensor and not to the ground at the secondary instrument end. Wiring method: Connect the three cores to the power supply, signal, and power ground respectively.
2. Wiring instructions for transmitter. Wiring type: two-wire system, using two core cable.
. Wiring method: Connect the "+" terminal of the vortex street to a+24V power supply. The "-" terminal of the vortex street is connected to the "+" terminal of the test instrument signal input. Short circuit the signal "-" end to the 24VDC "-" end to form a circuit. This circuit outputs a 4-20mA current signal.III. Supplementary Explanation of Performance Characteristics Signal Output: The transmitter can output a 4-20mA two-wire current signal corresponding to the flow signal, which is suitable for long-distance transmission.
. Display function: It can simultaneously display cumulative flow and instantaneous flow, facilitating real-time monitoring. Correction function: It has five non-linear correction functions, which can improve measurement accuracy. Anti interference design: small signal cutoff function to avoid small wave interference. Damping time can be freely set to optimize signal stability. Process advantages: Adopting surface mount technology, with small volume and compact stru
2. Reasons for inaccurate vortex flowmeter
Hello, KNKE, a well-known American imported vortex flowmeter brand commonly used in the project, is pleased to answer your question.
.1、 Parameter issues: Due to errors in the flow meter parameters, the entire instrument indication is incorrect. Parameter errors can cause errors in the calculation of the secondary instruments full frequency. A small difference in full frequency can result in inaccurate readings for a long time. The actual full frequency is greater than the calculated full frequency, which can cause a wide range of fluctuations in the indication and make it impossible to read. And the inconsistency of parameters in its data also affected the final determination of parameters. Later, the parameters were determined by recalibration combined with mutual comparison, which solved this problem. 2. Selection issues for imported vortex flowmeters from the United States: Some vortex flowmeters may choose a larger diameter specification due to changes in process conditions during pipe diameter selection or design selection. In actual selection, the smallest possible pipe diameter should be chosen to improve measurement accuracy, such as providing several devices for use in a set of vortex pipelines. Due to the fact that some equipment in the process cannot be used at times, the actual flow rate currently in use has decreased. The actual use has resulted in the origina