Keithley 2302 Instruction Manual page 96

3-34 Pulse Current Measurements
Continuous pulse train
NOTE
The following command sequence measures pulses similar to the one shown in
a continuous pulse train. The step duration is 600μsec with a step period of 2 seconds.
DISP:CHAN 1
SENS:CURR:RANG 5
SENS:PCUR:STEP ON
SENS:FUNC 'PCUR'
SENS:PCUR:STEP:UP 4
SENS:PCUR:STEP:DOWN 0
SENS:PCUR:STEP:RANGE .75
SENS:PCUR:STEP:TIME 100e-6
SENS:PCUR:STEP:DEL 50e-6
SENS:PCUR:STEP:TOUT 3e-3
SENS:PCUR:STEP:TOUT:INIT 3
SENS:PCUR:STEP:TLEV1 750e-3
SENS:PCUR:STEP:TLEV2 400e-3
SENS:PCUR:STEP:TLEV3 500e-3
SENS:PCUR:STEP:TLEV4 625e-3
READ:ARR?
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For the Model 2306-PJ to function correctly, the current range must be selected
before selecting the trigger level range.
' Set active channel - battery.
' Select 5A current range.
' Enable step.
' Select PCUR function.
' Specify 4 up steps.
' Specify 0 down steps.
' Specify 1 amp range.
' Specify 100 microseconds for step
' integration time.
' Specific 50 microseconds for step delay.
' Recall 400 microseconds needed for complet-
' ing previous step measurement and being
' ready for next. With 600 microseconds of
' step duration, we have 50 microseconds to
' spare:
' 600 (step duration) - 400 (step processing
' time) - 100 (step integration time) -
' 50(step delay) = 50 (spare time).
' Specify 3 milliseconds for step
' timeout except for first step. Recall
' timeout needs to be long enough to bypass
' the 600mA, 300mA, and 100mA steps, but not
' so short it misses the 450mA step (600μsec x
' 3 = 1.8 msec). Using 3msec accounts for the
' first step spare time as well.
' Specify 3 seconds for first step timeout.
' Recall for continuous pulse measurement,
' need to have an initial step timeout long
' enough to bypass the pulse period.
' Step 1 tlev value.
' Step 2 tlev value.
' Step 3 tlev value.
' Step 4 tlev value.
' Trigger and return the 4 step measurements.
Figure 3-9 in