Keithley SourceMeter 2600 Series Reference Manual page 348

12-74 Instrument Control Library
smuX.measure.lowrangeY
Attribute Lowest measure range that will be used during autoranging.
Usage
rangeval = smuX.measure.lowrangeY
smuX.measure.lowrangeY = rangeval
rangeval
• This attribute is used with auto-ranging to put a lower bound on the range used.
Remarks
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), where
Remarks
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. A / May 2006
Series 2600 System SourceMeters Reference Manual
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)
Set from 0.001 to 25.
Section 6.
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p)
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 12 topics
-- Reads low range.
-- Writes low range.
-- Reads nplc.
-- Writes nplc.
where: