What is the difference between the output form of vortex flowmeter, on-site display, and pulse output?

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1. Cumulative flow rate of flowmeter pulse output

The core relationship between flowmeter pulse output and cumulative flow rate is that the cumulative flow rate is calculated by accumulating the number of pulses and multiplying it by the pulse equivalent. 1. Core concept: Numerical pulse output: The flowmeter converts instantaneous flow into electrical pulse signals, and the signal frequency is proportional to the flow rate. The larger the flow rate, the higher the pulse frequency. Cumulative flow rate: The total amount of fluid flowing through a flowmeter over a period of time, which is the integral of instantaneous flow rate over time.

2. Calculation principle: The formula for calculating cumulative flow rate is: cumulative flow rate=total number of pulses x pulse equivalent (K-series potato stem number). Pulse equivalent (or K coefficient) is a core parameter that refers to the fluid volume represented by each pulse (e.g. 1 pulse=0.01 liters). This parameter is determined by the flowmeter model and is usually clearly calibrated in the calibration certificate or product manual.

3. Implementation Method: PLC (Programmable Logic Controller) or flow integrator are commonly used in industry to receive pulse signals. These devices have high-speed counters inside, which accumulate and count pulses, multiply them by a preset K coefficient, and finally display or output the cumulative flow value. This technology is widely used in scenarios that require accurate measurement and batch control, such as raw material proportioning in the chemical industry, trade settlement in water treatment and energy fields (water and gas metering), and its high-precision characteristics are the basis for achieving accurate

2. How to read the pulse signal of the flowmeter

The reading method of the pulse signal change crack number of the flowmeter mainly depends on the type of signal and the reading equipment used to read it. The core is to convert the flow value by counting the pulse frequency or quantity.

Firstly, signal type recognition requires confirmation of the electrical characteristics of the flowmeter pulse output.

1. Open collector circuit (NPN/PNP): The most commonly used and requires external power supply (usually 12-24VDC), with a level jump during the pulse (NPN pulse pulls down to 0V, PNP pulls up to the supply voltage).

2. Hardware connection scheme: Select the matching reading device according to the signal type: • PLC high-speed counter: the most commonly used scheme, supporting frequencies above 100kHz (such as HSC of Siemens S7-1200) • Pulse collection module: RS485/Ethernet pulse module (such as Advantech ADAM-4080) can be selected for IoT applications • Single chip microcontroller acquisition: Arduino/STM32 reads through interrupts or external counters (requires level matching circuit) • Special display instrument: matched with flow integrator to directly display cumulative flow

3. Key parameter settings: Three core parameters must be configured before reading

1. Pulse equivalent (K coefficient) Each pulse represents a flow rate value (e.g. 1 pulse pulse duration=0.1 liters), refer to the flowmeter manual for 2

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