Keithley 2606B System SourceMeter, Reference Manual

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2606B System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2606B-901-01 Rev. B / May 2018 7-101
Usage
imeas = i_leakage_measure( smu, levelv, limiti, sourcedelay, measurei, measuredelay )
imeas The measured current
smu Instrument channel (for example,
smua
refers to SMU channel A)
levelv Voltage level to step to when this function is called
limiti Current limit setting for the voltage step
sourcedelay Delay to wait before lowering the current limit for measurement
measurei
Current limit (and measure range); note the current limit is lower at this level and
because high-capacitance mode is active, the measure range will follow
measuredelay Delay to wait after lowering the current limit before taking the measurement
Details
This function causes the
smu
to:
•
Change its current limit to
limiti
with a voltage output of
levelv
for
sourcedelay
time, and
then change its current limit to
measurei
(that also changes the measurement range to
measurei
) for
measuredelay
time
•
When
measuredelay
time expires, a measurement is made and returned as
imeas
.
When measuring leakage current:
•
Charge the capacitor before calling this function (the output of the instrument is usually at a
nonzero voltage before calling this function; when measuring leakage, this function does not
charge the capacitor).
•
Set
levelv = 0
Example
smua.source.highc = smua.ENABLE
smua.source.levelv = 5
smua.source.output = smua.OUTPUT_ON
delay(1)
imeas = i_leakage_measure(smua, 0, 1, 300e-3,
10e-6, .1)
Enable high-capacitance mode. Charge the
capacitor at 5 V for 1 second set
by
delay(1)
.
The parameters passed on to the
i_leakage_measure()
function in this
example are:
smu = smua
levelv = 0 V
limiti = 1 A
sourcedelay = 300 ms
measurei = 10
µ
A range
measuredelay = 100 ms
The levels and delays depend on the value
and type of capacitor used.
Also see
i_leakage_threshold() (on page 7-102)
High-capacitance mode (on page 3-61)
KIHighC factory script (on page 5-20)