The instantaneous shell vibration amplitude in the Bentley system is the highest
Thread Content
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?
The setup suggested by the poster should be probe—converter—Bentley system. First, swap the card channel with that of another good measurement point; if that doesn’t work, replace the converter; and if that still doesn’t work, the only option is to wait until the system is shut down before replacing the probe.
Direct probe ---- Bentley system ---- PLC system; under normal conditions the measurement values are 0.3 gpk, with occasional readings exceeding the range by 10 gpk. Fortunately, no interlock mechanism has been implemented, otherwise the unit would have stopped operating many times already. Trying a different channel might help; there should be no problem with the probe, right?
The cable has been replaced; try cleaning the coaxial cable connectors with alcohol. Also check the channel – if that doesn’t work, the only option is to shut down the system and replace the probe. I’ve encountered cases where there were problems with the cable section leading to the converter; the vibration level would suddenly rise and then drop again. The issue was resolved after replacing that cable section.
The cable has been replaced; try cleaning the coaxial cable connectors with alcohol. Also check the channel – if that doesn’t work, the only option is to shut down the system and replace the probe. I’ve encountered cases where there were problems with the cable section leading to the converter; the vibration level would suddenly rise and then drop again. The issue was resolved after replacing that cable section.