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How to cut off the small flow signal of the vortex flowmeter?
When setting the sail pulse output of the vortex flowmeter, it is also necessary to set the small signal cutoff. In fact, from the working principle, the vortex flowmeter with pulse output does not have zero drift. The reason is that when the flow rate is zero, there will be no vortex generated behind the vortex generator device, so there is no pulse output. Due to the large amplitude of the pulse signal output by the probe of the vortex flowmeter, interference is not easy to invade. However, when the flow rate is low and interference is easy to invade, the small flow signal cutoff method is used, so that the lead bench can ensure normal measurement of the instrument at high flow rates and stable grip indication of zero when the flow rate is below the minimum measurable value at low flow rates.
2. Can someone help me explain the meaning of small flow cutoff for steam vortex flowmeter?
Vortex small flow cutoff refers to not accumulating when the frequency or instantaneous flow rate is below a certain value.. Small flow cutoff is generally set at the lower limit of the vortex range and around it, to cut off abnormal signals generated by vortex sensors due to vibration or other interference. However, if you set a small flow cutoff that interferes with production signals or calculates a flow rate greater than the cutoff value, the flow rate will also be accumulated. The statement of users is incorrect. Small flow frequency cutoff, for example, when the actual frequency 110 is greater than the cutoff frequency value by 10, displays the normal frequency 110 and the flow rate is also the actual flow rate; Why does the Rosemount vortex
when it is less than 10? _Baidu ...
Are you referring to the screen not displaying? The instrument can be displayed through parameter settings. If the instantaneous flow is zero, but the cumulative flow continues to accumulate, it may be due to a small flow cutoff. In this case, the instrument will filter out very low flow signals to avoid inaccurate instantaneous flow caused by signal interference. There is no need to worry too much about normal signal interference, as there is no actual time record and the accumulated traffic can only be used as reference data. When the instantaneous flow rate is not displayed, the parameter settings of the instrument can be checked to ensure its correct configuration. If the settings are correct but the problem still appears, it is recommended to check the connection and power status of the instrument. Sometimes, instrument display issues may be related to hardware or software failures. If the problem persists, it is best to contact the manufacturer or professional technicians for further diagnosis. In practical applications, the display of instantaneous flow rate and cumulative flow rate of vortex flowmeter may be affected by various factors. Signal interference is one of the common causes, especially in industrial environments. In order to ensure the accuracy of data rows, the instrument usually sets a threshold. When the instantaneous flow rate is below this threshold, the system may automatically cut off this part of the data and only display the effective flow rate. This helps to reduce erroneous data caused by interference. For the situation where the instantaneo
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