Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2450-901-01 Rev. B/September 2013 8-99
Example 2
reset()
--set up measure function
smu.measure.func = smu.FUNC_DC_CURRENT
smu.measure.terminals = smu.TERMINALS_REAR
smu.measure.autorange = smu.ON
smu.measure.nplc = 1
--set up source function
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.ilimit.level = 0.1
smu.source.level = 20
smu.source.delay = 0.1
smu.source.highc = smu.OFF
--turn on output and initiate readings
smu.source.output = smu.ON
trigger.model.load("SimpleLoop", 200)
trigger.model.initiate()
waitcomplete()
--Parse index and data into three columns
print("Rdg #", "Times", "Current (A)")
for i=1, defbuffer1.n do
print(i, defbuffer1.relativetimestamps[i], defbuffer1[i])
end
--Discharge the capacitor to 0 V and turn off the output
smu.source.level=0
delay(2)
smu.source.output=smu.OFF
This example uses the Simple Loop trigger model template to do a capacitor test. This also outputs 200
readings that are similar to the following output:
Rdg # Time (s) Current (A)
1 0 8.5718931952528e-11
2 0.151875 1.6215984111057e-10
3 0.303727 1.5521139928865e-10
. . .
198 29.91579194 1.5521250951167e-10
199 30.067648716 1.4131290582142e-10
200 30.219497716 1.5521067764368e-10
Also see
smu.measure.read() (on page 8-119)
trigger.model.load() — Simple Loop (on page 8-191)

Keithley 2450 Specifications

General

Model	2450
Category	SourceMeter
Voltage Source Range	±200 V
Current Source Range	±1 A
DC Voltage	200 V
DC Current	1 A
Power Output	20 W
Resolution	6.5 digits
Display	5-inch capacitive touchscreen
Operating Temperature	0°C to 50°C
Connectivity	USB, LAN, GPIB
Dimensions	213 mm × 88 mm × 370 mm