Hello Scott. Thanks for your replay.
I tried what you have recommended but it didn't help. I have reload a firmware for EVM module and now it is working. Now I would like to ask you for an advise.
My application require a distance measurement in a range from 1 to 3 cm. Seeing the distance of 3 cm is not a challenge. But trying to detect distances below 2.5 cm become more difficult because the ringing time of an ultrasonic sensor. My application require a sealed transducer as it will see a fluid and its pressure. Let me brief you about my application. The goal is to measure the distance from the sensor to the inside wall of the pipe. The sensor is mounted on O.D. of a tube of a smaller diameter which will be inserted into the pipe to be measured in such a way that face of the sealed sensor is flush with the tube O.D. This tube will be concentric (approximately) with bigger pipe. The pipe has different I.D. and sensor has to measure the distance to the inside diameter. The distances will be vary as i have mentioned above between 1 and 3 cm. I isolated the cylindrical side of the sensor from the tube trying to reduce sensor ringing but it is still quite big and prevent EVM's GUI software from detecting short distances. (I tried to use short TOF settings for GUI and I see the echo on oscilloscope but its amplitude is smaller than crystal ringing and software cannot generate a STOP pulse). Now I am thinking to use two sensors. One as a transmitter another as a receiver to measure the TOF. Do you think this approach will allow me to measure short distances reliably? If yes, could you please tell me how should I connect transducers to the EVM board and what changes to the GUI configuration should I make to use them in a such arrangement?
