First, we have to see whether the installation position is correct, whether the site has a waveguide tube, through the waveform judgment probe has not touched other obstacles, the probe from the bottom of the tank to more than 10 centimeters. If you do not measure the distance, first look at the waveform if normal, you can generally adjust the threshold to a smaller value, preferably not less than 5, you can also be when the range is enlarged; if the value jumps, to see to which position to change, if to zero point pick can be appropriate to reduce the range.
Generally speaking, you should first communicate to determine whether there is a problem with the parameters, and then determine the problem through the waveform. If the current is relatively small and can not communicate, you can first increase the current by pressing the button to adjust the low level to increase the current and then finally change the parameters back.
Some sites can be in the central control line cabinet communication, to communicate can not use their own power. If it can not communicate, could press by key debugging, first determine whether there is a problem with the parameters, in looking at the signal judgment, if the measurement is accurate and the upper row of the signal is greater than 30 basics there is nothing wrong. If the display E040 general board is bad, you need to change the board.
If there is no signal or the signal is very small generally have two situations, one is the rod antenna is not having material, so there will be no signal, you can increase the range by 30 centimeters. The second is not connected to the sensor, the waveform baseline at this time will be very high, always measure the front, need to connect and adjust well.