Section 6: Leakage current and insulation resistance
Model 2450 Interactive SourceMeter® Instrument User's Manual
6-6
2450-900-01 Rev. C / December 2013
Set up the leakage current application using SCPI commands
The following SCPI code performs a capacitor leakage measurement by sourcing 20 V and
measuring the resulting leakage current. The Duration Loop trigger model template applies the
voltage for 60 seconds and makes measurements at 200 ms intervals. After the duration time, the
capacitor is discharged at 0 V and the output is turned off.
Send the following commands for this example application:
Command
Description
*RST
:SOUR:FUNC VOLT
:SOUR:VOLT 20
:SOUR:VOLT:ILIMIT 0.01
:SENSE:FUNC "CURR"
:ROUT:TERM REAR
:CURR:RANG:AUTO ON
:SENSE:CURR:NPLC 1
:TRIG:LOAD:LOOP:DUR 60, 0.2
:OUTP ON
:INIT
*WAI
:TRAC:ACT? "defbuffer1"
:TRAC:DATA? 1, <n>, "defbuffer1", READ, REL
:SOUR:VOLT 0
:OUTP OFF
•
Reset the Model 2450.
•
Set to source voltage.
•
Set the source voltage to 20 V.
•
Set the current limit to 10 mA.
•
Set the instrument to measure current.
•
Set to use rear-panel terminals.
•
Set the current range to autorange.
•
Set the number of power line cycles
to 1.
•
Load the Duration Loop trigger model
to run for 60 s at 200 ms intervals.
•
Turn on the output.
•
Trigger the measurement.
•
Wait for the measurement to finish.
•
<n>
is the queried number of readings.
•
Query the number of readings in
defbuffer1
and return the readings
and time.
•
Discharge the capacitor to 0 V.
•
Turn off the output.
Set up the leakage current application using TSP commands
The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB).
TSB is a software tool included on one of the CD-ROMs that came with your Model 2450. You can
install and use TSB to write code and develop scripts for TSP-enabled instruments. Information
about how to use TSB is in the online help for TSB and in the “Introduction to TSP operation” section
of the
Model 2450 Reference Manual
.
To use other programming environments, you may need to make changes to the example TSP code.
By default, the Model 2450 is configured to use the SCPI command set. You must select the TSP
command set before sending TSP commands to the instrument.
To enable TSP commands:
1. Press the
MENU
key.
2. Under System, select
Settings
.
3. Select the button next to Command Set and select
TSP
.
4. You are prompted to reboot. Select
Yes
.