Operating Manuals:
The useable rise time of a current transformer is defined with respect to a transition from one current level to another. If the difference between the levels is defined as 100%, then the rise time is the interval from 10% to 90% of the transition.
When a fast-rising current transition is applied to a current transformer, it is typical for the output to either overshoot and ring, or rise more slowly than the input current pulse. If the overshoot or ringing amplitude is less than 10% of the transition, the output is considered useable. Therefore, the fastest 10 to 90% transition that causes no more than 10% overshoot and ringing is known as the useable rise time. If the output does not overshoot or ring, then the output voltage rise time becomes the useable rise time.
The figure below illustrates this for a Pearson Model 110. A faster Model 2877 is used to show the input current wave shape on channel 2. The oscilloscope has measured the rise time of channel 2 as 12.90 ns. This is the useable rise time because it has caused a 10% overshoot in the Model 110 output voltage signal shown in channel 1.
In choosing a current monitor, the specified useable rise time should be less than the rise-time of the current pulse to be viewed.
Pearson Electronics is pleased to introduce a new Injection Probe, Current Probe and Test Fixture specifically designed for meeting MIL-STD-461 and 
New line of Wide-Band Clamp-on Current Monitors features a 4 inch or 6 inch aperture in a 
Pearson Electronics Powerline Ripple Detector greatly simplifies the measurement of injected audio-frequency ripple on an ac power bus in EMI tests such as MIL-STD-461G CS101. The model PRD-120 accurately measures low-level audio ripple voltage on a 115 Vac power bus. The model PRD-240 is designed for voltages above 120 Vac and up to up to 240 Vac; 270Vdc. Both are used with a spectrum analyzer.
New ultra-thin 
Pearson Electronics introduces a new wide band current monitor that allows you to easily measure current within a coaxial cable system. The current monitor can be inserted within a coaxial cable run by means of two BNC connectors. The Model 6027 has a 3dB bandwidth from 300 Hz to 200 MHz and an rms current rating of 2.5 Amperes. 
