Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2450-901-01 Rev. B/September 2013 8-137
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
Restore configuration
Instrument reset
Power cycle
Source configuration list
Current: 1.05E-04
Voltage: 21
Usage
value = smu.source.xlimit.level
smu.source.xlimit.level = value
value
The limit:
• Current: -1 to 1 amps
•
Voltage: -200 to 200 volts
x
The function for which to set the limit:
• Voltage: v
• Current:
i
Details
This command sets the source limit for measurements. The Model 2450 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 source limit is changed to a limit
that is appropriate to the range and a warning is generated.
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 8-141)
smu.source.xlimit.tripped (on page 8-138)

Keithley 2450 Specifications

General

Model	2450
Category	SourceMeter
Voltage Source Range	±200 V
Current Source Range	±1 A
DC Voltage	200 V
DC Current	1 A
Power Output	20 W
Resolution	6.5 digits
Display	5-inch capacitive touchscreen
Operating Temperature	0°C to 50°C
Connectivity	USB, LAN, GPIB
Dimensions	213 mm × 88 mm × 370 mm