Other Parts Discussed in Thread: TDC1000
Hi,
I am attempting to read the level of LPG in a steel container. I have sourced the TDC1000-C2000EVM and using the SMD15T21R111WL transducer. My first test was with a glass jar of water. I was able to connect the transducer to the bottom and got reliable and accurate readings.
I then moved to a 9kg gas cylinder. I get readings from the EVM but they do not correlate to anything. I have tried to repeat with a smaller disposable 500g LPG cartridge. My thinking was that this has a lot thinner bottom. The readings are always almost the same for both gas cylinders. This indicates to me that the EVM is not measuring liquid gas but something else.
I have played around with increasing the number of TXs, increasing the gain and the timeout values. What is strange is that the TOF reading varies quite drastically with these changes. Shouldn't they be more or less the same? The readings are almost always the same for both cylinders.
What I need to understand is whether the EVM should be able to read LPG? Or is the fact that it is pressurised affecting the readings? If I should be able to then what configuration should I be using?