Stripchart recording is an important tool for analyzing complex data. It provides a visual means to easily digest extensive quantities of recorded information over long time periods. In most cases,…
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Recording Interharmonics with the Revolution
Interharmonics are on the rise because of large non-linear loads and sources being introduced to the distribution network, in particular large Variable Frequency Drives (VFDs) and inverters for distributed generation.…
Computing IEEE 519-2014 Short Time Harmonic Values
IEEE 519-2014 specifies two time periods for analyzing harmonic data: "very short time", or 3 seconds, and "short time" or 10 minutes. For achieving the best resolution, the 3 second…
ProVision Settings for Wireless Communications
This white paper describes the proper communication settings for wireless PMI Recorders using ProVision software. PMI offers many different recorders for capturing disturbing and expensive PQ events. With the many…
Automatic Update Manager
When software products were first created, it was common to only release a final version, simply due to the overhead of distributing the products via physical medium. However, with the…
Flicker Investigation Strategy
Flicker is defined as fluctuation or wavering in visible light intensity due to voltage variations. These variations in voltage are caused by fluctuations in the load through the system source…
Power Transformer K-Factor
In this white paper I review K-factor in regards to power transformers, how K-factor is defined and calculated and how K-factor is used. K-factor is a way of rating or…
Disconnecting a Power Quality Recorder
This whitepaper covers the proper method used to disconnect power quality recorders and remove them safely from their location. Following the proper disconnection sequence eliminates or minimizes generating and recording…
Getting Started with Stripchart Analysis in ProVision
Stripchart data, also known as trend or interval data, is often the most important information in a power quality recording. The bulk of the recorder memory is dedicated to it,…
Oscillatory Transient Ring Frequency
This white paper provides details on how to estimate ring frequency caused by resonances formed between power corrections capacitors and inductive loads using ProVision. Waveform data captured using PMI's Eagle…
Using Bluetooth with PMI Recorders
This white paper documents the procedure for installing a Bluetooth device and the proper communication settings for wireless PMI Recorders using ProVision software. PMI offers several power quality recorders for…
Understanding PMI Data Record Types – Part 1
The job of any power monitor is to record all interesting data and leave unrecorded the vast majority of boring, unremarkable data. The tricky part for a monitor is deciding…
