I decided to log the mains grid frequency for a full 24hr period 🤷🏼‍♂️🤓

Using the Philips PM6669 and an external OCXO (calibrated, see earlier post when I received it) I get a quite accurate result. Each measurement takes 10 seconds, so in reality there’s some averaging going on right there, removing some of the jitter and noise at those last digits. The grid frequency is highly dynamic once you reach a millihertz resolution, and that is in fact what I’m trying to capture 🙂

The PM6669 counter has a really nice feature btw., it’s max input level is 260Vrms! That’s really handy, in reality I could connect it straight to a mains outlet without damaging it, but due to the risk of transients I’m using a small transformer and the cute little Vellemann oscilloscope training kit so I can pick a more safe 12Vrms instead 👌🏻⚡️🙂

Tonight I’ll have 8640 datapoints to play with 🤓

#testandmeasurement #becauseican #electronics #electronicsengineering #engineer #velleman #philips #gridfrequency #mainsgrid

I decided to log the mains grid frequency for a full 24hr period 🤷🏼‍♂️🤓

Using the Philips PM6669 and an external OCXO (calibrated, see earlier post when I received it) I get a quite accurate result. Each measurement takes 10 seconds, so in reality there’s some averaging going on right there, removing some of the jitter and noise at those last digits. The grid frequency is highly dynamic once you reach a millihertz resolution, and that is in fact what I’m trying to capture 🙂

The PM6669 counter has a really nice feature btw., it’s max input level is 260Vrms! That’s really handy, in reality I could connect it straight to a mains outlet without damaging it, but due to the risk of transients I’m using a small transformer and the cute little Vellemann oscilloscope training kit so I can pick a more safe 12Vrms instead 👌🏻⚡️🙂

Tonight I’ll have 8640 datapoints to play with 🤓

#testandmeasurement #becauseican #electronics #electronicsengineering #engineer #velleman #philips #gridfrequency #mainsgrid