The Bentley system detects the highest level of shell vibration drift
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The Bentley system’s pressure-sensitive acceleration probes are used to detect vibrations in the gearbox housing; on the PLC, the data often shows that the values are above the specified range, even though the actual vibration levels aren’t that high. If the vibrations were indeed severe, it wouldn’t be possible for only one gauge to show an out-of-range value (there are 16 detection probes in one gearbox). The return circuit has been switched to the backup line, but the out-of-range phenomenon still occurs. What is the specific reason? Is the probe broken?
What specific model is your probe? Is a field transmitter being used or a 3500 frame? It is recommended to first swap the wiring of the normal probe and the faulty probe and then observe.
We have encountered similar situations where, with the unit in standby mode, the vibration levels soared to their maximum; it was clearly a false signal. The solution involved swapping the signal wires of the normal probe and the faulty probe, and after making that swap, the signal feedback returned to normal. It was later determined that the pre-amplifier was faulty; after replacement, it worked properly.