Keithley 2461, Reference Manual, Page: 1074 / 1109

Appendix D: Convert Model 2400 to Model 2461 code Model 2461 Interactive SourceMeter® Instrument Reference Manual
D-2 2461-901-01 A/November 2015
In the Model 2461, the
READ?
command does not initiate a trigger when it makes a measurement. It
also makes only one measurement at a time. The data is automatically stored in a buffer
(
defbuffer1
if the buffer is not specified in the command).
In the Model 2461, use the
TRACe:DATA?
command to read the information from the buffer and take
a specified amount of data instead of all data. You can also define which data to return, such as the
date, time, and units of measure.
The
:INITiate
command is used to start the trigger model. To trigger measurements when you are
not using the trigger model, use
:TRACe:TRIGger
.
The command for the number of readings is also different. In the Model 2461, use the Simple Loop
Trigger Template command
TRIG:LOAD "SimpleLoop"
.
An example of a data acquisition done for the Model 2400 compared with one done for the Model
2461 is shown in the following table. In these examples, the SourceMeter
®
instruments are
programmed to output 5 V and take 10 current readings with autorange ON. The instruments return
the source value, current measurements, and relative timestamps.
Model 2400 Model 2461
*RST *RST
SOUR:FUNC VOLT SOUR:FUNC VOLT
SOUR:DEL 0.1 SOUR:VOLT 5
SOUR:VOLT 5 SOUR:VOLT:ILIM 0.01
SENS:FUNC "CURR" SENS:FUNC "CURR"
SENS:CURR:RANG:AUTO ON SENS:CURR:RANG:AUTO ON
SENS:CURR:PROT 0.01 TRIG:LOAD "SimpleLoop", 10, 0.1
:FORM:ELEM VOLT, CURR, TIME OUTP ON
:TRIG:COUNT 10 INIT
:SYST:TIME:RES:AUTO ON *WAI
:OUTP ON TRAC:DATA? 1, 10, "defbuffer1", SOUR, READ, REL
READ?
OUTP OFF OUTP OFF
Display commands
The display commands have changed in the Model 2461 to accommodate the change to the
touchscreen display. For information, see Display features (on page 2-45).
Making resistance measurements
The method for selecting manual or auto ohms and for making resistance measurements is different
in the Model 2461 than it is in the Series 2400. For information about resistance measurements, see
Making resistance measurements (on page 2-105).