Keithley 2461, Reference Manual, Page: 892 / 1109

Model 2461 Interactive SourceMeter® Instrument Reference Manual Section 8: TSP command reference
2461-901-01 A/November 2015 8-219
smu.source.xlimit.level
This attribute selects the source limit for measurements.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Restore configuration
Instrument reset
Power cycle
Source configuration list
Function change
Configuration script
Source configuration list
Voltage: 105 µA
Current: 7.35 V
Usage
value = smu.source. x limit.level
smu.source. x limit.level = value
value
The limit:
•
Current: 1 µA to 7.35 A
•
Voltage: 0.2 V to 105 V
x
The function for which to set the limit:
•
Voltage:
v
•
Current:
i
Details
This command sets the source limit for measurements. The Model 2461 cannot source levels that
exceed this limit.
The values that can be set for this command are limited by the setting for the overvoltage protection
limit.
This value can also be limited by the measurement range. If a specific measurement range is set, the
limit must be more than 0.1 % of the measurement range. If you set the measurement range to be
automatically selected, the measurement range does not affect the limit.
If you change the source range to a level that is not appropriate for this limit, the instrument changes
the source limit to a limit that is appropriate to the range and a warning is generated.
Limits are absolute values.
You can use the
smu.source.xlimit.tripped
command to check the limit state of the pulse
source output.
Example
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.ilimit.level = 1
Set the source function to voltage with the
current limit set to 1 A.
Also see
smu.source.protect.level (on page 8-188)
smu.source.xlimit.tripped (on page 8-220)