Keithley 2601 Reference Manual page 326

Section 12: Instrument Control Library
This Model 2601/2602 measure and step function measures current starting at a
Example
source value of 0V. After each current measurement, the source is stepped 100mV
for the next current measurement. The final source level is 1V where current is
again measured.
local ivalues = {}
smua.source.rangev = 1
smua.source.levelv = 0
smua.measure.rangei = 0.01
smua.source.output = smua.OUTPUT_ON
for index = 1, 10 do
ivalues[index] = smua.measureiandstep(index / 10)
end
ivalues[11] = smua.measure.i()
smuX.nvbufferY
Attribute Non-volatile reading buffers.
Usage
smuX.nvbufferY
Remarks • There are two reading buffers: smuX.nvbuffer1
• All routines that return measurements can return them in reading buffers. Overlapped
measurements are always returned in a reading buffer. Synchronous measurements
return either a single-point measurement or can be stored in a reading buffer if passed to
the measurement command.
The non-volatile reading buffers will retain their data between power cycles.
•
Details See "Reading
Also see smuX.makebuffer, smuX.measure.overlappedY,
Example Store current readings from SMU A into buffer 1:
smua.measure.overlappedi(smua.nvbuffer1)
smuX.nvbufferY.appendmode
Attribute Append mode for the reading buffer.
Usage state = smuX.nvbufferY.appendmode
smuX.nvbufferY.appendmode = state
Set
state
0 Append mode off
1 Append mode on
Remarks • Assigning to this attribute enables or disables the buffer append mode.
• With append mode on, the first new measurement will be stored at rb[n+1], where n is
the number of readings stored in the buffer.
Details See "Reading
Also see smuX.measure.overlappedY, smuX.measure.Y,
Append new readings for SMU A to contents of buffer 1:
Example
smua.nvbuffer1.appendmode = 1
smuX.nvbufferY.basetimestamp
Attribute Timestamp of when the first reading was stored from time of power-up.
Usage
basetime = smuX.nvbufferY.basetimestamp
12-66
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
buffers" in this section and in
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
-- Reads append mode.
-- Writes append mode.
to one of the following values:
buffer content.
buffer content.
buffers" in this section and in
X = SMU channel (a or b)
Y = NV buffer (1 or 2)
Return to Section Topics
Series 2600 System SourceMeter® Instruments Reference Manual
and
smuX.nvbuffer2
Section 7.
smuX.measure.Y
New measure data overwrites the previous
Appends new measure data to the present
Section 7.
smuX.nvbufferY
.
2600S-901-01 Rev. C / January 2008