19-136
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2600AS-901-01 Rev. B / September 2008
Section 19: Remote Commands
Series 2600A System SourceMeter® Instruments Reference Manual
smuX.source.lowrangeY
X = SMU channel (a or b)
Y = SMU measure function (
v
or
i
)
Where:
v
= voltage,
i
= current
Attribute
Lowest source range that will be used during autoranging.
Default
lowrange
i
100e-9 (2601A/2602A/2611A/2612A)
1e-9 (2635A/2636A)
lowrange
v
100e-3 (2601A/2602A)
200e-3 (2611A/2612A/2635A/2636A)
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage
rangeval = smuX.source.lowrangev -- Reads voltage low range.
smuX.source.lowrangev = rangeval -- Writes voltage low range.
rangeval = smuX.source.lowrangei -- Reads current low range.
smuX.source.lowrangei = rangeval -- Writes current low range.
rangeval
Set to the lowest voltage or current range to be used.
Remarks
• This attribute is used with source autoranging to put a lower bound on the range used. Lower
ranges generally require greater settling times. By setting a low range value, sourcing small
values might be able to be made with less settling time.
• If the instrument is set to auto range and it is on a range lower than the one specified by
rangeval
, the source range will be changed to the range specified by
rangeval
.
Details
See
Also see
Example
Sets volts low range for Model 2601A/2602A SMU A to 1V. This prevents the source from using the
100mV range when sourcing voltage:
smua.source.lowrangev = 1
smuX.source.offlimiti
X = SMU channel (a or b)
Attribute
The current limit used when the SMU is in output off normal mode.
Default
1e-3
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage
ivalue = smuX.source.offlimiti -- Read the limit.
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
Also see
Example
Change the off normal limit to 10mA for SMU A:
smua.source.offlimiti = 10e-3