Pulse Current Step Method (Battery Channel Only) - Keithley 2302 Instruction Manual

3-32 Pulse Current Measurements

Pulse current STEP method (battery channel only)

NOTE
Sample step method
The following command sequence measures pulses similar to the one shown in
The step duration is 50ms with a pulse period of 2 seconds.
DISP:CHAN 1
SENS:CURR:RANG 5
SENS:PCUR:STEP ON
SENS:FUNC 'PCUR'
SENS:PCUR:STEP:UP 5
SENS:PCUR:STEP:DOWN 4
SENS:PCUR:STEP:TIME 20e-3
SENS:PCUR:STEP:RANGE 0.75
SENS:PCUR:STEP:TOUT:INIT 3
SENS:PCUR:STEP:DEL 10e-3
SENS:PCUR:STEP:TLEV1 100e-3
SENS:PCUR:STEP:TLEV2 300e-3
SENS:PCUR:STEP:TLEV3 500e-3
SENS:PCUR:STEP:TLEV4 700e-3
SENS:PCUR:STEP:TLEV5 900e-3
SENS:PCUR:STEP:TLEV6 900e-3
SENS:PCUR:STEP:TLEV7 600e-3
SENS:PCUR:STEP:TLEV8 400e-3
SENS:PCUR:STEP:TLEV9 300e-3
READ:ARR?
NOTE
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For the Model 2306-PJ to function correctly, the current range must be selected
before selecting the trigger level range.
Since this sample program is for a continuous pulse train, the pulse it measures could
also be measured using the single shot method.
' Set active channel - battery.
' Select 5A current range.
' Enable step.
' Select PCUR function.
' Specify 5 up steps.
' Specify 4 down steps
' active steps = 9 (5 up + 4 down).
' Specify 20 milliseconds integration time
' for all active steps must be within 400μsec
' of step duration.
' Specify 1 amp step range.
' Specify 3 seconds for first step timeout
' (this has to be longer than pulse period).
' Specify 10 milliseconds for user step delay.
' With 50 milliseconds of step duration, we
' use 50 milliseconds (step duration) -
' 30 milliseconds = 20 milliseconds spare time.
' Recall 400 microseconds needed for complet-
' ing previous step measurement and being
' ready for next.
' Step 1 tlev value.
' Step 2 tlev value.
' Step 3 tlev value.
' Step 4 tlev value.
' Step 5 tlev value.
' Step 6 tlev value.
' Step 7 tlev value.
' Step 8 tlev value.
' Step 9 tlev value.
' Trigger and return the 9 step measurements.
(See "One-shot pulse" on page
Figure 3-7.
3-33.)