In the past, the processors available on the market were not powerful enough to measure and calculate the various parameters at the same time.

Therefore, only a random measurement was carried out on older measurement devices. In other words, measurements were taken for several periods, then the measurement was stopped and the values calculated. No further measurements were taken during processing. Out of 50 periods, only a few periods were actually measured.

The new product families, such as the UMG 96RM, UMG 104, UMG 604, UMG 605, UMG 508, and UMG 511, use state-of-the-art microprocessors with a completely new architecture, integrated performance ranges, and considerably higher powers.

Such processors were not available in the past! These processors are more expensive than conventional processors, which are still widely used in many simple measurement devices. Continuous measurement is used for the product families mentioned above. All periods are recorded here, i.e. 50 periods out of 50 periods are measured. At the same time, the data is processed and the various electrical, PQ, and energy parameters are calculated.

So it goes without saying that this results in a significant improvement in measuring accuracy. It is also important to note that with rapid load changes (e.g. spot welding) a random measurement can lead to a considerable deviation in the measurement result, as with the working measurement.

Continuous measurement requires higher quality components. Continuously measuring all values achieves significantly higher measuring accuracies.

Simple measurement devices and measurement devices with a cheap or older design of measuring electronics are still offered with random measurement. If you look at the world market, random measurement will even predominate and be state of the art!

It is often the case that work is measured continuously, but all other values are not measured continuously, they are only via random samples.