Keithley 2601 Reference Manual page 325

Series 2600 System SourceMeter® Instruments Reference Manual
smuX.measure.Y
smuX.measure.iv
Function Performs one or more measurements.
There are three ways to use this function:
Usage
reading = smuX.measure.Y()
reading = smuX.measure.Y(rbuffer)
reading = smuX.measure.iv(ibuffer, vbuffer)
reading
rbuffer
ibuffer
vbuffer
Remarks • This function returns only the last actual measurement as reading. To use the
additional information acquired while making a measurement, a reading buffer must be
used. If the instrument is configured to return multiple readings when a measurement is
requested, all readings will be available in rbuffer if one is provided, but only the last
measurement will be returned as reading
• The smuX.measure.iv function stores both current and voltage readings in respective
buffers (current and then voltage are stored in separate buffers).
The
• smuX.measure.count
performed. When using a buffer, it also determines the number of readings to
store in the buffer.
Details See "Reading
Also see smuX.nvbufferY,
Performs ten voltage measurements using SMU A and stores them in a buffer:
Example
smua.measure.count = 10
smua.measure.v(smua.nvbuffer1)
smuX.measureYandstep
smuX.measureivandstep
Function Performs one or two measurements and then steps the source.
This function can be used in two ways:
Usage
reading = smuX.measureYandstep(sourcevalue)
readings = smuX.measureivandstep(sourcevalue)
reading
readings
sourcevalue
Remarks • The smuX.measureYandstep function performs a measurement and then sets the
source to sourcevalue. The smuX.measureivandstep function is similar, but
performs two measurements; one for current (i) and one for voltage (v).
• The specified source value should be appropriate for the selected source function. For
example, if the source voltage function is selected, then sourcevalue is expected to be
a new voltage level.
• Both source and measure auto range must be disabled before using this function.
• This function is provided for very fast execution of source-measure loops. The
measurement will be made prior to stepping the source. Prior to using this function, and
before any loop this function may be used in, the source value should be set to its initial
level.
Also see smuX.measure.Y
2600S-901-01 Rev. C / January 2008
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p)
where: v = voltage, i = current, r = resistance, p = power
Returns the last reading of the measurement
process.
A reading buffer object where all 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.
attribute determines how many measurements are
buffers" in Section 7.
smuX.nvbufferY
X = SMU channel (a or b)
Y = SMU measure function (v, i, iv, r or p)where:
v = voltage, i = current, r = resistance, p = power
Returns the measured reading before stepping
the source.
Returns the two measured readings before
stepping the source.
Source value to be set after the measurement is
made.
Return to Section Topics
.
Section 12: Instrument Control Library
12-65