3500/65-01-01 Bently Nevada 4-channel monitor

3500/65-01-01

3500/65-01-01

3500/65-01-01

The amplitude is abnormally large, and although the frequency is not shown, the signal is still seen as an interference signal. The main reason is that although an adapter was used, attention was not paid to the grounding issue of the collection instrument. This issue is often overlooked in data collection practice. The collection equipment should be grounded and the power supply should be clean. It is always the first thing to check and confirm when collecting data. Even if data is collected from Bentley's 3500 monitoring system, the collection equipment cannot be casually connected to external power supply. The author has encountered many such examples, which should be taken seriously.