Keithley 2450 Reference Manual page 161

Section 3: Functions and features
4. Select the Make Active button. The "Are you sure" dialog box is displayed.
5. Select Yes. A list of available buffers is displayed. An asterisk in the first column of the buffer list
indicates which buffer is the active reading buffer. For example, testData is the active buffer in
the following figure.
After you select a reading buffer, the buffer becomes the active buffer. The active buffer indicator on
the HOME screen displays the name of the active buffer.
You can also select reading buffers from the active buffer indicator on the HOME screen. Refer to
Active buffer indicator
Using SCPI commands to select a reading buffer:
To make a measurement and store the readings in a specific reading buffer, send the :READ?
<bufferName> command. If you do not specify a buffer when you send the READ? command,
readings are stored in defbuffer1.
An alternative to sending the :READ? <bufferName> command is to send the TRACe:TRIGger
<buffer name> command.
The TRACe:TRIGger <buffer name> command stores readings in the specified reading buffer. If
no buffer is specified for the parameter, defbuffer1 is used. To see the readings stored in the
buffer after using this command, use the FETCh? command to see the last reading stored in the
buffer or TRACe:DATA? command to see multiple readings from the buffer.
When you specify a user-defined reading buffer, you must create the buffer before you can specify it.
To select current as the measurement function, measure current, and return the readings in the
testData reading buffer, send the following commands:
SENSe:FUNCtion "CURRent"
READ? "testData"
To measure current and store the readings in the defbuffer2 reading buffer, send the following
command:
MEASure:CURRent? "defbuffer2"
To measure voltage and store the readings in the defbuffer2 reading buffer, send the following
command:
MEASure:VOLTage? "defbuffer2"
3-16
Model 2450 Interactive SourceMeter® Instrument Reference Manual
Figure 69: MANAGE MEASURE BUFFERS window
(on page 2-14) for information about using the indicator to select buffers.
2450-901-01 Rev. B/September 2013