The combination of Canvass and Boomerangs strategically placed in a distribution system allows for a unique system-wide analysis of voltage trends. Analyzing voltage data from multiple locations in parallel reveals…
White Papers
Browse our library of power quality technical resources.
450 white papers
Threshold Configuration Settings in Canvass
The settings configuration window is a new feature in PMI's Canvass web software. It allows the user to set thresholds for each channel and measure supported by the recorder. When…
Annotations in ProVision
ProVision offers many different graphing options, which allow different types of power quality data to be presented for examination and analysis. In addition to presenting the graph, ProVision also includes…
UDP vs TCP on a Cellular Network
The Boomerang family of wireless monitors all utilize a cellular modem to provide a remote data connection. This makes remote monitoring very convenient but it does require the installer to…
Vector Diagrams for Commonly Used Power Circuits
This white paper describes vectors and vector diagrams. It provides the vector diagrams and sketches of the connections required for correctly installing a power monitor on commonly used power circuit…
Analyzing Apparent and Reactive Power Using Canvass
Canvass, PMI's cloud-based data analysis portal, has recently been upgraded to provide the facilities for apparent and reactive power analysis for plug-in and meter-socket form 2S Boomerangs. This white paper…
Ring Frequency, PF and CF from Waveform Capture
With the Point Table in the Waveform Capture function of ProVision, it is possible to estimate the ring frequency, phase shift, power factor, and crest factor of a waveform.
Calculating Interharmonics with Raw Waveform Data
The Revolution PQ recorder can compute interharmonics in real-time, and also record each one individually as a stripchart. Each harmonic and interharmonic group and subgroup, as defined by IEC 61000-4-7,…
Understanding the Harmonic Analysis Report
Harmonics are distortions in the 60Hz voltage or current caused by non-linear loads on the system. Harmonics are of interest to utilities as they can cause damage to equipment, such…
Two Minute Countdown
Prior to recording, PMI recorders have a countdown interval of time used for initialization called the "Two Minute Countdown". This period of time is used to verify proper hookup, change…
Keyboard Shortcuts for PMI Software
Both ProVision and Canvass offer a wide array of user input options. These options range from mouse use to keyboard inputs. Specific keystroke inputs are typically referred to as "shortcut…
Monitoring Variable Frequency Drives
Variable Frequency Drives (VFDs) are increasingly common, especially with the push for energy efficiency (in residential applications) and better motor control (in industrial applications). Unfortunately, the gains made with VFDs…