How to monitor voltage fluctuations
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If the voltage is unstable, is there an instrument or meter that can detect it and capture the instantaneous change?
General voltage meters cannot detect instantaneous values. Try using an oscilloscope.
I don't know what the time level of "instantaneous change" is, seconds or milliseconds? Using a voltage transmitter + paperless recorder can check the general voltage change curve. I have also heard of integrated meters. The time level is determined by the sampling time of the recording meter.
It should be on the second level. If there is a voltage and current transmitter, we want to lead the voltage signal to the central control room to make a trend.
Add a wave recorder and you can see the dynamic monitoring of the test.
There is a product called LDCK power distribution comprehensive measurement and control instrument (made in Shenzhen). Can carry out voltage upper and lower limit protection ； Voltage harmonic upper limit protection (can record historical data of total distortion rate and harmonic content of each order), etc. ； Might be helpful for your application.