12-74 Instrument Control Library
Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006
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smuX.measure.lowrangeY
X = SMU channel (a or b)
Y = SMU measure function (v or i) where v = voltage, i = current
Attribute
Lowest measure range that will be used during autoranging.
Usage
rangeval = smuX.measure.lowrangeY
-- Reads low range.
smuX.measure.lowrangeY = rangeval
-- Writes low range.
rangeval
Set to the lowest voltage or current measure range.
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 “
Also see
Example
Sets volts lowrange for Model 2601/2602 SMU A to 1V:
smua.measure.lowrangev = 1
smuX.measure.nplc
X = SMU channel (a or b)
Attribute
Integration aperture for measurements.
Usage
nplc = smuX.measure.nplc
-- Reads nplc.
smuX.measure.nplc = nplc
-- Writes nplc.
nplc
Set from 0.001 to 25.
Remarks
• The integration aperture is based on the number of power line cycles (NPLC), 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 “
.
Example
Sets integration time for SMU A (0.5/60 seconds):
smua.measure.nplc = 0.5
smuX.measure.overlappedY
smuX.measure.overlappediv
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p)
where:
v = voltage, i = current, r = resistance, p = power
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
A reading buffer object where the reading(s) will be stored.
ibuffer
A reading buffer object where current reading(s) will be stored.
vbuffer
A reading buffer object where voltage reading(s) will be stored.
Summary of Contents for SourceMeter 2600 Series
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