Turbo flowmeter: issues regarding minimum and maximum flow rates as well as the measurement range. Reply to get 20 wealth points
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This post was last edited by JumpingWind001 on 2024-7-23 at 11:15. Brief description: It’s a turbine flow meter with a minimum flow rate of 50 cubic meters per hour and a maximum flow rate of 700 cubic meters per hour. Questions: 1. When the flow rate is below the minimum or above the maximum, will any data be displayed? 2. Change the range of the DCS and the turbine flowmeter to 0-1500 cubic meters per hour. Check whether the values displayed by the instruments match the actual flow rate; in other words, after changing the range, are the actual values consistent with those displayed after the range change? Thank you to all the experts and professionals; thanks in advance.
1. When the flow rate is below the minimum flow rate of 50 m³/h or above the maximum flow rate of 700 m³/h, the Vortex Flow Meter may not display the data correctly. Outside these limits, the measurement accuracy and stability of the instrument cannot be guaranteed; it may display incorrect data or no data at all. 2. After adjusting the range of the DCS and turbine flowmeter to 0-1500 m³/h, if the actual flow rate exceeds the originally designed maximum flow rate of 700 m³/h, the values displayed by the instruments may not correspond to the actual flow rate. The physical and measurement characteristics of flowmeters are typically designed for a specific range; outside this range, the accuracy and linearity of the data cannot be guaranteed. Therefore, after modifying the range, the actual data is likely not to be exactly identical to the data after the range modification, especially when going beyond the original designed range. .
The minimum flow rate is the lowest flow rate required to ensure measurement accuracy; for example, if the minimum flow rate is set at 50, values below 50 may still be recorded in practice, but measurement accuracy cannot be guaranteed in such cases. The maximum flow rate represents the upper limit of flow that can be measured by this gauge – exceeding this value requires an increase in the gauge size and a new selection of appropriate components. The range setting in the DCS should match the range configured on the instrument; any changes to the range are related only to the corresponding 4-20mA signal values, and not to the actual value displayed on the gauge
This post was last edited by JumpingWind001 on 2024-7-23 at 15:18. The modified range is only related to the corresponding 4-20mA value. Yes, is this corresponding value related to the 50-700 range? Is it still the 0-1500 range? The range of the DCS should be set to match the range specified in the instrument configuration; I’m referring to the range of the gauge head and that of the DCS
This post was last edited by xxkhc on 2024-7-24 at 15:49. The maximum range ratio for typical turbine flowmeters is 1:20.
The answer that replies to you on the 2nd floor is the correct one. As long as the range of the configuration for the gauge header matches that of the DCS, there will be no issues with the display. If you set the gauge header to 0-1500, the DCS should also be set to 0-1500. You can consider 50-700 to be the optimal operating range for this gauge; actual flow rates below 50 or above 700 will result in significant errors. The header range you mentioned is the same thing as the instrument configuration range discussed on the second floor.
Can a mass flow meter be used for natural gas?
You can take a look at the calculation sheet for this instrument; it shows the minimum and maximum flow rates that can be measured, as well as the accuracy of the measurement at the minimum flow rate. As long as these values fall within the measurement range achievable by the instrument itself, it is possible to set the appropriate ranges for both the instrument and the control system