439 Digital Current Integrator

• Measures DC or average value of pulse currents
• Usable as digital current integrator, digital charge integrator, or digital electrometer
• Wide dynamic range
• Input protected to ±1000 V (0.01 µF) or ±2000 V (0.001 µF)

The ORTEC Model 439 Digital Current Integrator was designed to accurately measure DC currents or the average value of pulse currents such as produced by accelerator beams. It digitizes the input current by producing an output pulse for specific values of input charge. A front-panel switch permit the selection of three different amounts of charge (10^–10, 10^–8 or 10^–6 coulomb) required to produce an output pulse. The instrument has a digitizing rate from 0 to 10 kHz to provide wide dynamic range on each setting and high-resolution readout without meter interpolation.