Section 6: Leakage current and insulation resistance
Model 2450 Interactive SourceMeter® Instrument User's Manual
6-10
2450-900-01 Rev. C / December 2013
Set up the application using SCPI commands
The following SCPI commands make insulation resistance measurements by sourcing 20 V and
measuring the resistance. The Simple Loop trigger model template is used to make
10 measurements at 100 ms intervals.
Send the following commands for this example application:
Command
Description
*RST
ROUT:TERM REAR
SOUR:FUNC VOLT
SOUR:VOLT 20
SOUR:VOLT:ILIM 0.01
SENS:FUNC "CURR"
SENS:CURR:RANG:AUTO ON
SENSE:CURR:UNIT OHM
TRIG:LOAD:LOOP:SIMP 10, 0.1
OUTP ON
INIT
*WAI
:TRAC:DATA? 1, 10, "defbuffer1", READ, REL
:OUTP OFF
•
Reset the Model 2450.
•
Select the rear-panel terminals for the
measurement.
•
Set to source voltage.
•
Output 20 V.
•
Set a 10 mA source limit.
•
Set the instrument to measure current.
•
Set the current range to autorange.
•
Set the instrument to measure resistance.
•
Use the Simple Loop trigger model to make 10
measurements at 100 ms.
•
Turn the output on.
•
Initiate readings.
•
Wait for the measurement to finish.
•
Read the resistance and time values from
defbuffer1
.
•
Turn the output off.
Set up the 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
.