I_Leakage_Measure(); I_Leakage_Threshold(); Initiatepulsetest() - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Details
This function is intended to be used when high-capacitance mode is active.
When the instrument is in high-capacitance mode, this function causes the smu to:
•
Change its current limit to limiti with a voltage output of levelv for sourcedelay time, and then
changes its current limit to measurei (that also changes the measurement range to measurei) for
measuredelay time
•
When measuredelay time expires, measurements are taken at a rate determined by the
smuX.measure.nplc setting
The function returns true if threshold is reached; the function returns false if threshold is not reached before
timeout expires.
When testing the leakage current threshold:
•
Charge the capacitor before calling this function (the instrument's output is usually at a non-zero voltage
prior to calling this function; when measuring leakage, this function does not charge the capacitor).
•
If testing the device's leakage current threshold, set levelv = 0.
Example
smua.source.highc = smua.ENABLE
smua.source.levelv = 5
smua.source.output = smua.OUTPUT_ON
delay(1)
pass = i_leakage_threshold(smua, 0, 1,
300e-3, 10e-6, 100e-3, 1e-6, 1)
Also see

i_leakage_measure()

High-capacitance mode

InitiatePulseTest()

This KIPulse factory script
Type TSP-Link accessible
Function No
2651A-901-01 Rev. A / March 2011
(on page 7-95)
(on page 3-65)
(on page 5-23) function initiates the pulse configuration assigned to tag.
Affected by
Enable high-capacitance mode.
Charge the capacitor.
The parameters passed on to the
i_threshold_measure() function in this
example are:
smu = smua
levelv = 0 V
limiti = 1 A
sourcedelay = 300 ms
measurei = 10 μA range
measuredelay = 100 ms
threshold = 1 μA
timeout = 1 s
The levels and delays will depend on the value
and type of capacitor used.
Sets pass = true if the current is measured
below 1 μA in less than 1 second.
Where saved Default value
Section 7: Command reference
7-97