Keithley 4200A-SCS - Page 922

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 13:
LPT library function reference
4200A-901-01 Rev. C / February 2017 13-77
Details
The lorangeX command is used with autoranging to limit the number of range changes, which
saves test time.
If the instrument is on a range lower than the one specified by the lorangeX command, the range is
changed. The 4200A-SCS automatically provides any settling delay for the range change that may be
necessary due to this potential range change.
Once defined, the lorangeX command is in effect until a devclr, devint, execut, or another
lorangeX command executes.
Example
double idatrg[25];
.
.
conpin(SMU1, 10, 0);
conpin(SMU2, 11, 0):
conpin(12, GND, 0);
lorangei(SMU1, 2.0E-6); /* Select 2 uA as minimum */
/* range during autoranging. */
smeasi(SMU1, idatvg); /* Set up sweep measurement */
/* of IDS. */
sweepv(SMU2, 0.0, 2.5, 24, 0.002); /* Sweep */
/* gate from 0 V to 2.5 V. */
This example illustrates how you would select the bottom autorange limit.
Also see
devclr (on page 13-67)
devint (on page 13-13)
execut (on page 13-16)