EDS E-Flow, Руководство пользователя

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Appendix A Frequently Asked Questions
1. Question: Why does the host computer not receive any data?
answer:
1) Check whether the power supply voltage is 7~32VDC, and re-power on after confirmation;
2) Check whether the communication mode, serial port number, and baud rate are correct;
3) Check whether the communication protocol is operated according to the instructions, and check whether the instructions
are correct;
4) Try to change a USB to 485 communication line to test again
2. Question: Why is the measured value always zero?
answer:
1) Confirm whether the radar transmitter probe is aimed at the measurement target;
2) Whether the measuring distance is within the reasonable range of the probe test.
3. Question: Why does the measured value jump frequently and greatly?
answer:
1) Check whether the power supply voltage is too low;
2) Whether there are obstacles in the measurement range;
3) Whether the probe is installed firmly and whether the radar flowmeter is installed parallel to the horizontal plane;
4) Check if there is a vortex.
4. Question: Why is the measured value not updated?
answer:
1) Check whether the water surface freezes due to seasonal reasons;
2) Check whether the measurement is inaccurate due to radar waves covering the ground due to low water period or main tank
swing.
5. Question: Used to measure water surface flow when flooding occurs. The water flow is very fast, the water is turbulent, the
water surface is rough, and there are many debris and floating objects. Can the radar flowmeter be used to obtain accurate
measurement results in this case?
Answer: Yes. The turbulent water current and the floating objects on the water surface can provide a good return signal for the
radar speed probe. Please note that in this case, the radar speed probe will read multiple speeds in different directions. The
radar speed probe will measure these speeds and get the average speed.
6. Question: The roughness of the water surface is good, and the water surface has ripples, but the reading of the radar speed
probe is still high and/or far below my expectations.
Answer: Make sure not to be too far away from the water surface when measuring. The exact distance is sometimes difficult to
determine because the measurement result is a function of the amount of signal returned to the radar speed probe. The
returned signal is directly related to the distance of the radar speed probe from the water surface and the roughness of the
water surface. The closer the radar speed probe is to the surface of the water, the better the measurement effect is even when
the water velocity is low. Regularly observe whether the cross arm or other fixing mechanism where the flowmeter is installed
is tilted or loosened due to external forces (such as strong wind).
7. Question: I am measuring the water flow velocity which is lower than 0.60m/s visually, but the reading is higher than
expected.
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