First, common sense issues
1. When the fluid temperature is below 150 degrees, the meter can run stably for a long time;
2. The flowmeter requires the power supply voltage fluctuation range to be 220VAC?5%; or 9-24VDC
3. The temperature range of the flowmeter mainframe can work normally from -20 °C to +60 °C;
4. The distance between the meter and the sensor is within 300 meters;
5. The power consumption of the fixed meter is 15w;
6, the instrument accuracy is ?%, linearity is 0.5%;
7. The instrument can measure when the pipe diameter is 25mm to 2540mm;
8. The turbidity of the measuring fluid should be less than 10,000 ppm and the bubble content is small;
Second, the question and answer questions
1. Why should I reliably ground when installing the meter?
1 Eliminate safety hazards and increase safety factor
2 eliminate the static interference of the meter itself
3 eliminate the interference of external space on the instrument
2. How to solve when there is frequency conversion on site?
1 separate the power supply of the meter from the variable frequency power supply to avoid power interference
2 Make the meter and the inverter different in one room to avoid space interference
3 Do the instrument grounding wire, the cable shielding wire must be connected
4 If the output port is selected, the shielded wire should be used to make a reliable grounding.
3. How to detect when the meter is powered on without display?
1 test instrument power supply board with or without AC voltage input
2 test the instrument board to see if the power board has DC voltage output
3 Open the panel and see if the socket is tight.
4. How to choose the installation point?
1 Select a straight pipe section filled with liquid.
2 The measuring point should be 10D upstream and 5D downstream, without any valve interference.
3 Ensure that the temperature of the measuring point is within the working range.
4 Select the pipe section that is uniform and dense, easy to ultrasonically transmit.
5 Avoid installing the instrument in water pumps, high-power radio stations, and places with magnetic fields and vibration interference.
6. What are the output functions of the meter?
1RS232 interface
2 current loop output
3 frequency output
7. There are two common installation methods for the instrument. Under what conditions, the V method is used, and under what conditions is the Z method used?
1V method: suitable for smaller pipe diameters generally D<250mm
2Z method: suitable for larger diameters, generally D>250mm
3 Normally, the V method is a standard installation method. When the pipe is very thick or due to the presence of suspended solids in the liquid, the pipe wall is heavily fouled or the lining is too thick.
When the V method is not working properly, select the Z method to install.
8. What are the standard configurations for fixed and portable ultrasonic flowmeters?
1 fixed type: one host, one pair of sensors, two wire ropes, four buckles, two silicone tubes, two springs, one manual.
2 portable: one host, one pair of cables with cable, one fixed sensor bracket, one power cord, one adapter, two steel chains
Root, two springs, one manual, one roll of printing paper.
9. When installing the sensor, the meter is always in the detection state. How to detect it?
1 Check if the parameter settings are correct;
2 Check the cable for breakage;
3 Check that the sensor wiring is correct;
4 check if the fluid is full;
5 Whether the wall of the pipe is too thick or the lining is not dense, and the point is re-commissioned.
CAR MORE+
Electric Carss,Electric Vehicles,Hybrid Cars,Ev Cars
DUDU NEW ENERGY AUTOMOBILE COMPANY , https://www.duduelectriccar.com