Performing Sweeps - Keithley SourceMeter 2400 Quick Start Manual

Section 1: Introduction
Source ranging
There are three options to control source ranging for a sweep; fixed, best fixed, and auto range.
With the fixed option selected, the SourceMeter stays on the source range that is selected at the
start of the sweep.
With best fixed selected, the largest source value in the sweep determines the range. For
example, if sweeping from 1V to 15V, the best fixed option will select the 20V range.
With the auto range option selected, the SourceMeter will select the most sensitive range for each
source value. For example if sweeping from 1V to 15V in 1V steps, the SourceMeter will source 1V
and 2V on the 2V range, and source the remaining source values on the 20V range.
Use the following menu sequence to select the source ranging option:
Press CONFIG > press SWEEP > select SOURCE RANGING > select BEST FIXED, AUTO
RANGE or FIXED
Source delay
Source delay allows the source to settle before a measurement is performed. As shown in Figures
6, 7, and 8, the delay occurs on each step (level) of the sweep. The delay can be set automatically
by the SourceMeter (auto delay) or it can be set manually.
With auto delay selected, the delay setting will be1ms, 2ms or 3ms depending on which current
range and source function is being used (see Section 3, Source delay in the 2400 Series
SourceMeter User's Manual). Manually, the source delay can be set from 0000.0000 to 9999.9980
sec.
Use the following menu sequence to set source delay:
Press CONFIG > press SOURCE V (or I) > select DELAY or AUTO DELAY
If DELAY is selected, you will be prompted to enter the delay value (in seconds). If AUTO DELAY
is selected, you will be prompted to DISABLE or ENABLE auto delay.

Performing sweeps

Performing a linear staircase sweep
Perform the following steps to run a linear staircase sweep:
1.
2.
3.
4.
5.
1-26
Configure the source and measure functions. The source level you set becomes the bias
level for the sweep. Typically, 0V or 0A is used as the bias level.
Configure the linear staircase sweep, including start, stop, and step values, as previously
explained.
Set the source delay as required.
Turn the output on. The SourceMeter will output the bias level.
Run the sweep by pressing the SWEEP key. When finished, turn the output off.
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Series 2400 SourceMeter® Quick Start Guide
2400S-903-01 Rev. E / September 2011