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1. Why does the smart flowmeter display a negative value of 23.85 during operation?
Xuner Instrument answers for you: The reason for the negative flow value is:
1. The sensor was not installed according to the flow direction label, causing the measurement direction to be opposite. Solution: Reinstall.
2、 The sensor signal line is reversed. Due to the forward and reverse flow measurement function of the intelligent electromagnetic flowmeter, the reverse flow is displayed. Solution: Swap the signal line.
3、 Measure if the pipeline is empty or not filled with gas. At this point, the flow meter will display negative numbers or fluctuating flow values. Solution: Fill the pipeline with the measured medium to enable the flowmeter to have measurement conditions. For detailed information, please refer to flow-meter.com.cn
2. This article helps you understand the pressure loss of flow meters
Detailed explanation of flow meter pressure loss. Flow meter pressure loss is one of the key indicators of flow meters, used to characterize the pressure difference between the input and output ends of the flow meter, and is also the minimum pressure difference to ensure the normal operation of the flow meter. The following is a detailed analysis of pressure loss in flow meters.
1. Definition of flowmeter pressure loss is a parameter used to describe the pressure difference (P1-P2) between the input (P1) and output (P2) of the flowmeter. It is the minimum pressure difference required to ensure the normal operation of the flowmeter and is also one of the basic parameters of the flowmeter. During the use of flow meters, the magnitude of pressure loss directly affects the energy consumption of the system, the measurement accuracy of the flow meter, and the stability of the system.
2. Principle flowmeter is an instrument that indicates the measured flow rate and/or the total amount of fluid within a selected time interval.
. It usually converts the flow information of gases or liquids into electrical signals for subsequent processing and display. During this process, the internal structure and principle of the flowmeter will result in a certain pressure loss. Specifically, when converting flow information into electrical signals, flow meters usually need to first convert the flow information into changes in calorific value, pressure, or electromagnetic fields, and then convert these changes into electrical signals through specific sensors. During this conversion process, due to the limitations of the internal structure of the flowmeter and the flow characteristics of the fluid, a certain amount of resistance will be generated, resulting in the pressure at the input end being greater than that at the output end, leading to pressure loss. Figure 1 shows a fluid simulation model of a typical flowmeter, which has a pressure difference generating structure similar to an orifice plate in the middle, used to generate sufficient flow in the bypass diversion channel. The flow rate in the bypass directly affects the sensitivity and detection limit of the flowmeter. In order to increase the flow rate, it is necessary to increase the pressure difference before and after the bypass diversion structure, which directly affects the pressure loss of the entire flowmeter.III. Influencing factors: Flow rate size: Flow meter pressure loss generally increases with the increase of flow rate.
. When the flow rate