Keithley 2601 Reference Manual page 321

Series 2600 System SourceMeter® Instruments Reference Manual
smuX.measure.lowrangeY
Attribute Lowest measure range that will be used during autoranging.
Usage rangeval = smuX.measure.lowrangeY
smuX.measure.lowrangeY = rangeval
rangeval
Remarks • This attribute is used with auto-ranging to put a lower bound on the range used.
Lower ranges generally require greater settling times. By setting a low range value,
measurements 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, the range will be changed to the range specified.
Details See "Range" in
Also see smuX.measure.autorangeY
Sets volts lowrange for Model 2601/2602 SMU A to 1V:
Example
smua.measure.lowrangev = 1
smuX.measure.nplc
Attribute Integration aperture for measurements.
Usage nplc = smuX.measure.nplc
smuX.measure.nplc = nplc
nplc
The integration aperture is based on the number of power line cycles (NPLC),
Remarks •
where 1PLC for 60Hz is 16.67msec (1/60) and 1 PLC for 50Hz is 20msec (1/
50).
The reset function sets the aperture to 1.0.
•
Details See "Speed" in
Sets integration time for SMU A (0.5/60 seconds):
Example
smua.measure.nplc = 0.5
smuX.measure.overlappedY
smuX.measure.overlappediv
Function Starts an asynchronous (background) measurement.
Usage There are two ways to use this function:
smuX.measure.overlappedY(rbuffer)
smuX.measure.overlappediv(ibuffer, vbuffer)
rbuffer
ibuffer
vbuffer
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
Set to the lowest voltage or current measure
range.
Section 6.
X = SMU channel (a or b)
-- Reads nplc.
-- Writes nplc.
Set from 0.001 to 25.
Section 6.
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p)
where:
v = voltage, i = current, r = resistance, p = power
A reading buffer object where the reading(s) will
be stored.
A reading buffer object where current reading(s)
will be stored.
A reading buffer object where voltage reading(s)
will be stored.
Return to Section Topics
-- Reads low range.
-- Writes low range.
Section 12: Instrument Control Library
12-61