Keithley 238 Source-Measure Units (SMU) is fully programmable
instrument, capable of sourcing and measuring voltage or current simultaneously. 238 is really four instruments
in one: voltage source, current source, voltage measure and current measure. The 238 offers a decade enhancement
in current source and measure (1A). In this higher current range, voltage source and measure is 15V maximum.
Keithley 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 500μs. Programmable delay and fast, integrating
measurement capability can provide coordinated source-measure times of 1ms.
Keithley 238 quotation today.
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Voltage / Current Source
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Measurements as a Function of Voltage, Current, or Time
Measurements can be taken and recorded in an internal memory along with corresponding values of the source voltage
or current and time. Up to 1000 values of each variable, correlated in time, may be accessed by the front panel
using either a rotary dial or a keypad. All measurement and source values along with the elapsed time may also
be obtained over the IEEE-488 bus. The internal memory is organized to obtain and present measurement results
in a versatile and easy to understand manner. All source values and corresponding measurement values are stored
in sequence and share a common index.
Keithley 238 Features
- Four instruments in one (voltage source, voltage measure, current source, current measure)
- 10fA, 10μV measurement sensitivity
- 1A source and measure
- Standard and custom sweep capability including pulse
- 1000 source/measurements per second
- Four quadrant source operation
- Internal 1000-reading memory
Ask for Keithley 238 detailed specification.