Keithley 2461 Reference Manual

Section
3: Functions and features Model 2461 Interactive SourceMeter® Instrument
Reference Manual
3-10 2461-901-01 A/November 2015
Using SCPI commands to set buffer capacity:
To set the testData reading buffer to hold 300 readings, send the following command:
TRACe:POINts 300, "testData"
Using TSP commands to set buffer capacity:
To set the testData reading buffer to hold 300 readings, send the following command:
testData.capacity = 300
Setting the buffer style
You can control the amount of information that is saved with each reading in the reading buffer by
selecting the buffer style when you create the buffer.
• Compact: Store more readings at lower precision, with relative timestamps and no formatting
information. Maximum 27,5000,000 readings. Once you store the first reading in a compact
buffer, you cannot change certain measurement settings, including range, display digits, and
units; you must clear the buffer first.
• Standard: Store readings with full precision and formatting information. Maximum 6,875,000
readings.
• Full: Store the same information as the standard style, plus additional information.
• Writable: Manually write external data to a reading buffer. For more information, see Writable
reading buffers (on page 3-27). You cannot select this buffer style from the front panel; you must
use remote commands.
• Full Writable: Manually write external data to a reading buffer with two values per buffer index.
You cannot select this buffer style from the front panel; you must use remote commands.
You can only select the style of the reading buffer when you first create the buffer.
Not all remote commands are compatible with the compact, writable, and full writable buffer styles.
Check the Details section of the command descriptions before using them with any of these buffer
styles.
Using the front panel to set the buffer style:
1. Press the MENU key.
2. Under Measure, select Reading Buffers. The MANAGE READING BUFFERS window is
displayed.
3. Select New. The Buffer Name dialog box is displayed.
4. Type a name for your buffer and select OK. The Style dialog box is displayed.

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV