Keithley 2302 User Manual

3-32 Pulse Current Measurements
Pulse current STEP method (battery channel only)
NOTE For the Model 2306-PJ to function correctly, the current range must be selected
before selecting the trigger level range.
Sample step method
The following command sequence measures pulses similar to the one shown in Figure 3-7.
The step duration is 50ms with a pulse period of 2 seconds.
DISP:CHAN 1 ‘ Set active channel - battery.
SENS:CURR:RANG 5 ‘ Select 5A current range.
SENS:PCUR:STEP ON ‘ Enable step.
SENS:FUNC ’PCUR’ ‘ Select PCUR function.
SENS:PCUR:STEP:UP 5 ‘ Specify 5 up steps.
SENS:PCUR:STEP:DOWN 4 ‘ Specify 4 down steps
‘ active steps = 9 (5 up + 4 down).
SENS:PCUR:STEP:TIME 20e-3 ‘ Specify 20 milliseconds integration time
‘ for all active steps must be within 400μsec
‘ of step duration.
SENS:PCUR:STEP:RANGE 0.75 ‘ Specify 1 amp step range.
SENS:PCUR:STEP:TOUT:INIT 3 ‘ Specify 3 seconds for first step timeout
‘ (this has to be longer than pulse period).
SENS:PCUR:STEP:DEL 10e-3 ‘ 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.
SENS:PCUR:STEP:TLEV1 100e-3 ‘ Step 1 tlev value.
SENS:PCUR:STEP:TLEV2 300e-3 ‘ Step 2 tlev value.
SENS:PCUR:STEP:TLEV3 500e-3 ‘ Step 3 tlev value.
SENS:PCUR:STEP:TLEV4 700e-3 ‘ Step 4 tlev value.
SENS:PCUR:STEP:TLEV5 900e-3 ‘ Step 5 tlev value.
SENS:PCUR:STEP:TLEV6 900e-3 ‘ Step 6 tlev value.
SENS:PCUR:STEP:TLEV7 600e-3 ‘ Step 7 tlev value.
SENS:PCUR:STEP:TLEV8 400e-3 ‘ Step 8 tlev value.
SENS:PCUR:STEP:TLEV9 300e-3 ‘ Step 9 tlev value.
READ:ARR? ‘ Trigger and return the 9 step measurements.
NOTE Since this sample program is for a continuous pulse train, the pulse it measures could
also be measured using the single shot method. (See “One-shot pulse” on page 3-33.)
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Keithley 2302 Specifications

General

Brand	Keithley
Model	2302
Category	Power Supply
Language	English