Keithley 2302 User Manual

Pulse Current Measurements 3-33
One-shot pulse
NOTE For the Model 2306-PJ to function correctly, the current range must be selected
before selecting the trigger level range.
The following command sequence measures pulses similar to the one shown in Figure 3-8
with a one-shot pulse measurement. The step duration is 600μsec
with 4msec between steps.
DISP:CHAN 1 ‘ Set active channel - battery.
SENS:PCUR:STEP ON ‘ Enable step.
SENS:FUNC ’PCUR’ ‘ Select PCUR function.
SENS:PCUR:STEP:UP 6 ‘ Specify 6 up steps.
SENS:PCUR:STEP:DOWN 0 ‘ Specify 0 down steps (remember the default
‘ is 1). See “Pulse sequences – rising and
‘ falling” on page 3-26 for more information.
SENS:CURR:RANG 5 ‘ Select 5A current range.
SENS:PCUR:STEP:RANGE .75 ‘ Specify 1 amp range.
SENS:PCUR:STEP:TIME 100e-6 ‘ Specify 100 microseconds for step integra-
‘ tion time.
SENS:PCUR:STEP:DEL 50e-6 ‘ Specify 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).
SENS:PCUR:STEP:TOUT 8e-3 ‘ Specify 8 milliseconds for step timeout ex-
‘ cept first one.
SENS:PCUR:STEP:TOUT:INIT 60 ‘ Specify 60 seconds for first step timeout.
‘ Recall for one shot pulse measurement, need
‘ to have a long initial step timeout since
‘ want to trigger the 2306 for pulse step mea-
‘ surement and wait between 3 to 5 seconds be
‘ fore generating the one shot pulse to guar-
‘ antee the Model 2306 is waiting for
‘ detection of first step.
‘ Using the same step trigger level for all steps is contained in the
‘ following sample. T
able 3-5 contains a sample with the one
‘ trigger level (as shown) and also with unique trigger levels for each
‘ step.
SENS:PCUR:STEP:TLEV1 200e-3 ‘ Step 1 TLEV value.
SENS:PCUR:STEP:TLEV2 200e-3 ‘ Step 2 TLEV value.
SENS:PCUR:STEP:TLEV3 200e-3 ‘ Step 3 TLEV value.
SENS:PCUR:STEP:TLEV4 200e-3 ‘ Step 4 TLEV value.
SENS:PCUR:STEP:TLEV5 200e-3 ‘ Step 5 TLEV value.
SENS:PCUR:STEP:TLEV6 200e-3 ‘ Step 6 TLEV value.
READ:ARR? ‘ Trigger and return the 6 step measurements
‘ After sending this command, wait a few seconds before generating a one
‘ shot pulse sequence.
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Keithley 2302 Specifications

General

Brand	Keithley
Model	2302
Category	Power Supply
Language	English