Keithley 2601 Reference Manual page 333

Series 2600 System SourceMeter® Instruments Reference Manual
smuX.source.lowrangeY
Attribute Lowest source range that will be used during autoranging.
Usage rangeval = smuX.source.lowrangeY
smuX.source.lowrangeY = rangeval
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
Details See "Range" in
Also see smuX.source.autorangeY,
Sets volts lowrange for Model 2601/2602 SMU A to 1V. This prevents the source
Example
from using the 100mV range when sourcing voltage:
smua.source.lowrangev = 1
smuX.source.offlimiti
Attribute The current limit used when the SMU is in output off normal mode.
ivalue = smuX.source.offlimiti -- read the limits
Usage
smuX.source.offlimiti = ivalue -- write the limit
ivalue
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
Also see smuX.source.offmode
Change the off normal limit to 10mA for SMU A:
Example
smua.source.offlimiti = 10e-3
smuX.source.offmode
Attribute Source output-off mode.
Usage offmode = smuX.source.offmode
smuX.source.offmode = offmode
Set offmode to one of the following values:
or
smuX.OUTPUT_NORMAL
0
or
smuX.OUTPUT_ZERO
1
or
smuX.OUTPUT_HIGH_Z
2
2600S-901-01 Rev. C / January 2008
X = SMU channel (a or b)
Y = SMU measure function (v or i)
where v = voltage, i = current
-- Reads low range.
-- Writes low range.
rangeval
current to be sourced.
, the source range will be changed to the range specified by
Section 6.
smuX.source.rangeY
X = SMU channel (a or b)
.
states" in Section 3
X = SMU channel (a or b)
-- Reads output-off mode.
-- Writes output-off mode.
Outputs 0V when the output is turned off.
Zero the output (in either volts or current)
when off.
Opens the output relay when the output is
turned off.
Return to Section Topics
Set to the lowest voltage or
= the current limit to use
Section 12: Instrument Control Library
.
rangeval
12-73