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『How to wire the fire flowmeter』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. Box type ultrasonic open channel flowmeter
2. Are the wires on the fire pipe fittings (such as pressure switches, flow meters) installed in modules or directly wired to the main cabinet ..
Module with direct pump start line. The fire flow switch, low pressure switch, and pressure switch are all the same and require direct pump line and input module feedback supervision.
3. Correct installation method for flow meters in fire pump rooms?
The device used to control the start of the pump is a pressure switch installed on the main outlet pipe of the fire water pump, and a flow switch installed on the outlet pipe of the high-level fire water tank.. Regulations on the installation of flow and pressure testing devices in fire pump rooms: When the flow rate of a single fire pump is not more than 20L/s and the design working pressure is not more than 0.50MPa, the pump unit should reserve interfaces for measuring flow meters and pressure gauges, and other pump units should be equipped with flow and pressure testing devices; The measurement accuracy of the fire pump flow detection device should be level 0.4, and 75% of the maximum range should be greater than 175% of the maximum design flow value of the fire pump; The measurement accuracy of the pressure detection device for the fire pump should be level 0.5, and 75% of the maximum range should be greater than 165% of the maximum design pressure value of the fire pump; Each fire pump outlet pipe should be equipped with a DN65 water test pipe and drainage measures should be taken.
4. The correct method for installing a fire ultrasonic flowmeter is to select a straight pipe section with full fluid flow and smooth flow, ensuring that t
. Before installing the sensor, the surface of the pipeline needs to be polished smooth, coated with coupling agent, and fixed with fixtures. Depending on the diameter of the pipe, the V method (≤ DN100) or Z method (>DN100) should be selected for installation. Adjust the position to ensure that the signal intensity is greater than 60 and the transmission time is stable within the range of 100 ± 3. Finally, perform zero point calibration. The installation position should be preferably selected in the middle of the vertical or horizontal pipe section to avoid gas accumulation at the top of the pipeline or scale buildup at the bottom, which may affect the measurement. It is strictly prohibited to install on the highest point of the pipeline or on vertical pipes with free outflow. For non full pipe conditions, it should be installed in U-shaped pipe sections. Cast iron pipes and rusted steel pipes must be thoroughly inspected and polished to a metallic luster, while plastic pipes require the use of specialized coupling agents. There should be no air bubbles or sand particles between the sensor and the pipeline, and the clamping fixture should be moderately tightened to ensure good contact. When wiring, connect the power supply, signal line, and 4-20mA output according to the instructions, and ensure that the shielding layer is reliably grounded. After installation, check if all connection points are secure, confirm that the instrument display is normal and there are no alarm messages, an