First, the use and characteristics of the quantitative flow control instrument.
The flow quantitative controller is a new type of flow measurement and control instrument developed by using advanced monolithic microcomputer technology. The flow quantitative controller has the advantages of small size, light weight, simple operation, intuitive display reading, clear and high reliability, and is suitable for flow quantitative control in petroleum, chemical, pharmaceutical and food industries.
The flow quantitative controller has an 8-digit digital tube and a 51-line light column to display the progress of the current batch in real time, which is intuitive and clear.
The flow quantitative controller has a good man-machine interface, and it is convenient and simple to modify the setting value and control the operation.
The flow quantitative controller has a built-in relay with large capacity contacts and a power-off protection device, which has high reliability and long life.
Second, the working principle of the flow quantitative controller.
The formula is calculated based on the flow sensor of the pulse output.
q = n where q has a cumulative flow rate (in liters).
n Number of pulses (times) of the flow signal
k Meter constant (litres).
The instrument constant is placed in the controller, the controller automatically calculates the corresponding pulse number according to the set value, the flow quantitative controller changes the built-in relay state when it starts, so that the control valve is opened, the controller counts the signal from the flow sensor, and the original state of the relay is restored when the set amount is reached, and the control valve will be closed, so as to realize the quantitative control of the flow in the pipeline.
3. Technical parameters of flow quantitative controller.
1 The measuring medium is up to the flow sensor sense.
2 Input signal 1-400hz, square wave low level 15V High Level 45v
3 Quantitative range 01-999999999 liters.
4 Maximum value of the meter constant can be placed 999999 liters.
5 Provide 12DV, 50mA power supply for the sensor.
6 Environmental conditions 0-45 Relative humidity less than 85
7. Power supply: 220V(187-242)AC 50Hz
8 8-digit LEDs show the cumulative total value and the light bar shows the batch progress.
9. Power-off protection for the cumulative total amount, instrument constant and previous quantitative value, and the protection time is more than 10 years.