2600S-901-01 Rev. C / January 2008 Return to Section Topics 12-73
Series 2600 System SourceMeter® Instruments Reference Manual Section 12: Instrument Control Library
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.
Usage rangeval = smuX.source.lowrangeY-- Reads low range.
smuX.source.lowrangeY = rangeval-- Writes low range.
rangeval Set to the lowest voltage or
current to be sourced.
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 “Range” in Section 6.
Also see smuX.source.autorangeY, smuX.source.rangeY
Example Sets volts lowrange for Model 2601/2602 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.
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.
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