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## Understanding 4-Wire Resistance Testing: A Guide for Inductive Loads

When it comes to accurately measuring the resistance of inductive loads, such as transformers and motors, precision is paramount. One of the most reliable methods for achieving this is 4-wire resistance testing. In this post, we’ll delve into what 4-wire...

## Igniter Testers in Aerospace And Defense

The Crucial Role of Igniter Testers in the Aerospace & Defense Industry In the highly intricate and safety-critical aerospace and defense industry, ensuring the reliability and functionality of every component is paramount. One such crucial component is the squib,...

## Benefits of Power Analysis

Power Analysis Detects Subtle Faults in Products Power analysis is essential to quality assurance in production testing for a wide variety of electrical products.  Power analysis (including harmonics and %THD) of a product is an excellent quality indicator of...

## Power Factor, Real Power, and Apparent Power

Apparent Power is the product of the rms voltage times rms current Apparent Power = E-rms x I-rms <—- also called (VA) The single phase (θ) power factor of a load is a ratio of real or true power (EI cos θ) to the apparent power (EI or volt-amperes). In...

## AC-DC Current Shunts vs. Current Transformers

Although all Valhalla wattmeters are compatible with general purpose current transformers, there are distinct accuracy and bandwidth advantages to using a current shunt when making a power measurement. Current shunts generally provide greater accuracy over a broader...

## Watts Converters

For Distorted Waveshapes of All Types The success of the Valhalla 2100 series wattmeter design is centered around a four-quadrant multiplier. The significance of the four quadrant theory is to provide a proper computation for watts under any phase relation between...

## Power Measurements in Inductive Circuits

The AC power drawn from the source (e.g. line – 120VAC @ 60Hz 220VAC @ 50Hz) is the integral over one cycle of the instantaneous watts values. As shown in figure C, during a portion of each cycle power is used by the inductive device (e.g. electric motor), while...

## RMS, Average, and Peak Amplitude Measurements

When describing the amplitudes of electronic devices, terms such as “volts RMS” or “amperes RMS” are used. The  RMS (root mean square) of a sine wave produces the same “heating effect” as an equivalent DC voltage level. (i.e. 5...