6220 Keithley Current Source New Wayne Kerr Photodetector such as a photo-multiplier

Photodetector such as a photo-multiplier and photo-transistor

so the difference between models is the available output range rather than the way the supply is operated or programmed

Trigger System Main Trigger Modes Auto

IQP (IQ player

1 ppm/yr or <±0

6220 Keithley Current Source New Wayne Kerr Photodetector such as a photo-multiplierKey Features at a Glance DC current source: 100 fA to 105 mA sourcing and sinking Output impedance >1014 on the 2 nA 20 nA ranges Voltage compliance programmable 0. 1 V to 105 V in 10 mV steps 65,000 point source memory for comprehensive sweep execution Model 220 emulation mode for drop in legacy replacement RS 232, GPIB, Trigger Link, and digital I O interfaces built in Reconfigurable triax output for application specific guarding Maximum trigger