『How to read the 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. Method of flowmeter reading
The method of flowmeter reading varies depending on the type of base height, with a focus on identifying the display area and mastering the numerical calculation logic. 1. The main feature of mechanical water meters is the combination structure of pointers and numbers. The reading is divided into two steps: • Integer part: directly read the black number in the center of the dial, in cubic meters. • Decimal part: Observe the surrounding red pointers. If the pointer marked with "× 0.1" points to 5, then the decimal part is 0.5 cubic meters. The total water volume is the sum of integers and decimals, for example, the black number displays 12 and the red pointer adds up to 0.5, resulting in a total usage of 12.5 cubic meters. 2. The electromagnetic flowmeter displays data directly through the display screen, and two parameters need to be considered: • Instantaneous flow rate: reflects the current flow rate, measured in liters per minute or cubic meters per hour. Accumulated flow: Record the total flow value of the device since its activation, usually in cubic meters or liters. Jian Xiang 3 The reading of vortex flowmeter is similar to that of electromagnetic flowmeter, and the key is to identify the display panel mode: some devices switch between displaying instantaneous flow and cumulative flow through buttons. -If equipped with a temperature sensor, pay attention to whether the data interface has mixed temperature parameters. four Ultrasonic flowmeter adopts non-contact measurement, and when reading, it is necessary to ensure that the probe is firmly installed and check the instantaneous flow rate and cumulative total amount of the host. -Regularly verify the calibration status of
2. How to calculate the reading of a steam flowmeter? We need to find the conversion relationship between the reading (T) of the steam flowmeter and the unit Nm3. Firstly, we need to understand the relationship between the reading of the steam flow meter and the volume of steam. The reading (T) of a steam flow meter usually represents the mass flow rate of a single unit, usually in kg/h or lb/h. And Nm3 is a volumetric unit that represents the volume at standard atmospheric pressure and dry mountain macro temperature (0 degrees Celsius or 273.15 Kelvin). To convert the reading of the steam flowmeter to Nm3, we need to consider the pressure and temperature of the steam. The conversion formula is usually: T=Nm3 × (ρ _steam/ρ _ air), where ρ _steam is the density of steam and ρ _ air is the density of air. But in this issue, we did not provide the density of the steam, so we cannot perform a complete calculation. To simplify the problem, we can assume that the density of steam is similar to that of water, about 1000kg/m3. Meanwhile, we also assume that the density of air is 1.225kg/m3. By substituting these values into the formula, the answer can be obtained. The conversion factor is 816.33 kg/m3 per Nm3, so every 1 Nm3 of steam is equivalent to a mass flow rate of 816.33 kg/h. 3. How should I read a rotor flowmeter? Why?
The reading method for the rotor flowmeter is as follows: For the sub flowmeter reading method, stand in
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