Keithley SourceMeter 2602 Reference Manual

12-74 Instrument Control Library Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Section 12 topics
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 “Range” in Section 6.
Also see smuX.measure.autorangeY
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 “Speed” in Section 6.
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.

Keithley SourceMeter 2602 Specifications

General

Brand	Keithley
Model	SourceMeter 2602
Category	Measuring Instruments
Language	English