Keithley SourceMeter 2602 Reference Manual

12-90 Instrument Control Library Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Section 12 topics
smuX.source.offlimiti
X = SMU channel (a or b)
Attribute The current limit used when the SMU is in output off normal mode.
Usage ivalue = smuX.source.offlimiti -- read the limits
smuX.source.offlimiti = ivalue -- write the limit
ivalue = the current limit to use
Remarks Setting this limit to lower than 1mA will not allow the contact check function to operate
when the output is off in normal mode.
Details See “Output-off states” in Section 3.
Also see smuX.source.offmode
Example
Change the off normal limit to 10mA for SMU A:
smua.source.offlimiti = 10e-3
smuX.source.offmode
X = SMU channel (a or b)
Attribute Source output-off mode.
Usage
offmode = smuX.source.offmode -- Reads output-off mode.
smuX.source.offmode = offmode -- Writes output-off mode.
Set offmode to one of the following values:
0 or smuX.OUTPUT_NORMAL Outputs 0V when the output is turned off.
1 or smuX.OUTPUT_ZERO Zero the output (in either volts or current) when off.
2 or smuX.OUTPUT_HIGH_Z Opens the output relay when the output is turned off.
Remarks
• Reading this attribute gives the output-off mode of the source. Setting this attribute
configures the SMU output-off mode.
• The default offmode is smuX.OUTPUT_NORMAL. In this mode, the SMU will source 0
volts. For the 2601/2602, the compliance to 10% of the current source range or
100uA, whichever is smaller. If the source function is voltage, the 10% compliance
will inherently be a reduction in compliance current. If the source function is current,
the 10% compliance value may be more or less than the current that was being
sourced. For the 2611/2612, the compliance to the value specified by
smuX.source.offlimiti (default 1mA).
• When offmode is set to smuX.OUTPUT_HIGH_Z, the SMU will open the output relay
when the output is turned off.
• When the offmode is set to smuX.OUTPUT_ZERO, the SMU will source 0 volts just as
OUTPUT_NORMAL mode does. If the source function is voltage, the current limit will
not be changed. If the source function was current, the current limit will be set to the
current source level or 10% of the current source range, whichever is greater.

Keithley SourceMeter 2602 Specifications

General

Brand	Keithley
Model	SourceMeter 2602
Category	Measuring Instruments
Language	English