The 236 will source voltage from 100V to 110V, and current from 100fA to 100mA. It can also measure voltage from 10V to 110V and current from 10fA to 100mA. The 237 offers the same capabilities with a decade enhancement in voltage source and measure (1100V). In this higher voltage range, current source and measure is 10mA maximum. The 238 offers a decade enhancement in current source and measure (1A). In this higher current range, voltage source and measure is 15V maximum.
The 236, 237, and 238 will measure very small currents and voltages. With current sensitivity of 10fA, measurement capabilities are equal to those of an electrometer. Selectable integration and the filtering of multiple measurements enhances sensitivity for demanding applications.
Both source voltages and source currents settle to specified accuracy in as little as 500us. Programmable delay and fast, integrating measurement capability can provide coordinated source-measure times of 1ms.