SafeRanging™

The PocketPico offers a unique patent pending technology called SafeRanging — a continuous ranging feature that is superior to the conventional relay based auto-ranging technology integrated into other picoammeters. SafeRanging allows the PocketPico to be a smaller, safer, more convenient instrument.

SafeRanging simplifies your testing by allowing you to measure current in the pico through milliamp ranges in a single measurement range while eliminating the problems of range selection and auto-range changing present in other picoammeters. SafeRanging makes use of a logarithmic current measurement scale across a wide range of input currents with no need to set a beginning measurement range.

Problems with Auto-Ranging

When auto-ranging was introduced into picoammeters including the Keithley 6485, it decreased testing time by enabling automation. However, this breakthrough came with some drawbacks, most notably an increased risk injected current due to transient voltages. The PocketPico’s SafeRanging technology solves this issue.

Other manufacturers warn that their picoammeters cannot maintain the voltage burden specification when switching ranges, and so the picoammeter becomes a current-limited voltage source until it re-attains equilibrium. This results in a current surge into your setup that can result in a voltage spike up to hundreds of volts.

The Simple Life

With the PocketPico there’s no need to estimate the range to begin taking measurements, no need to define a specific range or trying to work around the problem, and no need for expensive protection hardware. Life in the lab is simpler, faster and more convenient. And with the portability of the PocketPico you can grab it, hook it up, and start your measurements.

For more information, view the PocketPico Ammeter Theory of Operation