The model 6487 picoammeter-voltage source has eight current measurement ranges and has a high speed of automatic range selection. It allows you to measure currents from 20 fA to 20 mA, carry out measurements at a speed of up to 1000 samples per second and supply a voltage from ±200 MV to ±505 V. Thanks to the resolution of 10 fA, excellent sensitivity, function voltage scans and the possibility of measuring resistances by changing the field