We have a 5402 LT without its cone antenna installed and it was working perfectly.
But later, after few years, it started giving a BAD signal.
It is mounted on a flange with 2 inches pipe under.
We did not installed the 2-inch cone antenna because it doesn't fit into the 40mm hole of the flange.
The pipe length under the flange is 530mm.
The tank height is 1500mm.
Total height of the LT from the "0" ref (bottom level of tank) is 1500mm + 530mm = 2030mm.
My questions are:
1. Is it because the cone antenna is not installed that's why it is giving a BAD signals now?
2. Can we retrofit the LT with a rod antenna? If yes, what are the things need to consider to retrofit the rod?
Thanks for your responses.
In reply to Rein:
In reply to Ingemar Serneby:
Hello Ingemar,
I'm back again after a long wait. Here are the updates on the radar transmitter.
I installed the 2" cone antenna and still, it did not clear the problem.
I hooked up the 475 and here's what I found:
1. The Microwave Module Status shows Invalid Reference Pulse. What does this mean?
2. I tried to Search for Surface and run the Measure and Learn but it failed due to built-in status response.
3. When I simulate, all Primary Values Status become Good_NonCascade, including the signal strength and the LCD displayed the simulated value. I did not activate the volume as I don't need it.
But when I stop simulating, all Primary Values Status goes BAD::Non_Specified and the LCD displayed "-- -- -- --" again.
4. Also, the Transducer Type is showing "-----------------". Is this normal?
5. And lastly, I removed the 2" cone antenna and repeated what I did from 1-4, and the result was the same. No change.
What could be the reason why it is not working properly?
Thanks again.
Rein
I was able to get the Echo Curve. Below is the screenshot.
Could this be a sign that the transmitter is actually faulty?
Because, I can't see any failure activated in the diagnostics under Resource Block.
And the device status shows GOOD.
Another strange thing on this Rosemount product is that, it did not even show in the parameters the Microwave Module or Hardware Error.
Only the Invalid Reference Pulse.
I'm sure the microwave module is damaged.
Thanks a lot Ingemar for your time in answering my queries. I can consider it solved. We will just replace the hardware.