Keithley 2651A User guide

www.keithley.com

Model 2651A High Power

System SourceMeter® Instrument

User’s Manual

2651A-900-01 Rev. A / March 2011

A G R E A T E R M E A S U R E O F C O N F I D E N C E

Model 2651A

High Power System SourceMeter® Instrument

User's Manual

Cleveland, Ohio, U.S.A.

Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part, without the prior written approval of Keithley Instruments, Inc. is strictly prohibited.

All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective holders.

The Lua 5.0 software and associated documentation files are copyright © 1994-2008, Tecgraf, PUC-Rio. Terms of license for the Lua software and associated documentation can be accessed at the Lua licensing site (http://www.lua.org/license.html).

Document number: 2651A-900-01 Rev. A / March 2011

Safety Precautions

The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.

The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures.

Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-voltages. Measurement Category II connections require protection for high transient over-voltages often associated with local AC mains connections. Assume all measurement, control, and data I/O connections are for connection to Category I sources unless otherwise marked or described in the user documentation.

Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

The instrument and accessories must be used in accordance with its specifications and operating instructions, or the safety of

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the equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.

Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.

If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid interlock.

If a screw is present, connect it to safety earth ground using the wire recommended in the user documentation.

The ! symbol on an instrument means caution, risk of danger. The user should refer to the operating instructions located in the user documentation in all cases where the symbol is marked on the instrument.

The symbol on an instrument means caution, risk of electric shock. Use standard safety precautions to avoid personal contact with these voltages.

The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The symbol indicates a connection terminal to the equipment frame.

If this Hg symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure.

The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and all test cables.

To maintain protection from electric shock and fire, replacement components in mains circuits — including the power transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national safety approvals may be used if the rating and type are the same. Other components that are not safety-related may be purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.

To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.

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	Table of Contents
Introduction.................................................................................................................	1-1
Welcome ..............................................................................................................................	1-1
Extended warranty ...............................................................................................................	1-1
Introduction to this manual...................................................................................................	1-1
CD-ROM contents................................................................................................................	1-2
Organization of manual sections..........................................................................................	1-2
Model 2651A applications....................................................................................................	1-2
Using the front-panel interface..................................................................................	2-1
Introduction ..........................................................................................................................	2-1
Front panel ...........................................................................................................................	2-1
Using the web interface..............................................................................................	3-1
Introduction ..........................................................................................................................	3-1
Connect to the instrument web interface .............................................................................	3-1
Web interface home page....................................................................................................	3-2
IP configuration tab ..............................................................................................................	3-2
TSB Embedded....................................................................................................................	3-3
Create a script using TSB Embedded .......................................................................................	3-3
Exercise: Create and run a script with TSB Embedded ............................................................	3-4
Reading buffers....................................................................................................................	3-7
Exercise: Retrieve readings from a buffer .................................................................................	3-7
TSP Express ........................................................................................................................	3-8
Making basic front-panel measurements .................................................................	4-1
Introduction ..........................................................................................................................	4-1
Equipment needed for this example ....................................................................................	4-1
Device connections ..............................................................................................................	4-1
Making front-panel measurements ......................................................................................	4-2
Step 1: Select and set source level ...........................................................................................	4-2
Step 2: Set compliance limit ......................................................................................................	4-2
Step 3: Select measurement function and range ......................................................................	4-2
Step 4: Turn output on ..............................................................................................................	4-2
Step 5: Observe readings on the display ..................................................................................	4-3
Step 6: Turn output off ..............................................................................................................	4-3

Table of Contents Model 2651A High Power System SourceMeter® Instrument User's Manual

Capturing high power pulse waveforms...................................................................	5-1
Introduction to capturing waveforms ....................................................................................	5-1
Equipment needed for this example ....................................................................................	5-1
Set up communication..........................................................................................................	5-1
Device connections ..............................................................................................................	5-2
Configuring the trigger model...............................................................................................	5-2
Example program code........................................................................................................	5-4
Example program usage......................................................................................................	5-9

Characterization of power discretes .........................................................................	6-1
Introduction to power discrete I-V curve testing...................................................................	6-1
Equipment needed for this example ....................................................................................	6-2
Set up communication..........................................................................................................	6-2
Device connections ..............................................................................................................	6-4
Configuring the trigger model...............................................................................................	6-5
Model 2651A trigger model operation .......................................................................................	6-7
Series 26xxA instrument's trigger model operation ...................................................................	6-9
Example program code......................................................................................................	6-10
Example program usage....................................................................................................	6-16

Increasing SMU current sourcing ability ..................................................................	7-1
Introduction to combining SMUs ..........................................................................................	7-1
Combining SMUs to increase current sourcing capability ...................................................	7-2
Equipment needed for this example ....................................................................................	7-3
Set up communication..........................................................................................................	7-3
Device connections ..............................................................................................................	7-4
Configuring the trigger model...............................................................................................	7-6
Master Model 2651A node[1] trigger model operation ..............................................................	7-8
Model 2651A node[2] trigger model operation ..........................................................................	7-8
Series 2600A trigger model operation.......................................................................................	7-9
Example program code........................................................................................................	7-9
Example program usage....................................................................................................	7-16

Troubleshooting FAQs...............................................................................................	8-1
About this section.................................................................................................................	8-1
Need different line frequency or voltage ..............................................................................	8-1
Can I use external trigger lines? ..........................................................................................	8-1

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Model 2651A High Power System SourceMeter® Instrument User's Manual	Table of Contents
The internal web page of the instrument is not accessible ..................................................	8-1
Save the present state of the instrument .............................................................................	8-2
LabVIEW driver for the Model 2651A ..................................................................................	8-2
Next steps....................................................................................................................	9-1
Additional Model 2651A information ....................................................................................	9-1
Index..............................................................................................................................	I-1

2651A-900-01 Rev. A / March 2011

iii

Section 1

Introduction

In this section:

Welcome ..................................................................................	1-1
Extended warranty ...................................................................	1-1
Introduction to this manual .......................................................	1-1
CD-ROM contents....................................................................	1-2
Organization of manual sections ..............................................	1-2
Model 2651A applications ........................................................	1-2

Welcome

Thank you for choosing a Keithley Instruments product. The Model 2651A High Power System SourceMeter® Instrument provides manufacturers of electronic components and semiconductor devices a high-power source-measure unit (SMU). A SMU is an instrument that combines source and measurement capabilities in a single instrument. This combination simplifies test processes by eliminating synchronization and connection issues associated with multiple instrument solutions. A Model 2651A provides a scalable, high throughput, highly cost-effective solution for precision DC, pulse, and low frequency AC source-measure testing that also maintains code compatibility with the Series 2600A.

Extended warranty

Additional years of warranty coverage are available on many products. These valuable contracts protect you from unbudgeted service expenses and provide additional years of protection at a fraction of the price of a repair. Extended warranties are available on new and existing products. Contact your local Keithley Instruments representative for details.

Introduction to this manual

This manual provides detailed tutorials to help you achieve success with your Keithley Instruments Model 2651A. In addition, the basics of the two simplest interfaces, the front panel and the web interface, are provided to familiarize you with the instrument. Select and run all examples in Sections 5, 6, and 7 that are relevant to your intended use and to the equipment you are using.

Some of the examples in this manual may use unfamiliar commands and concepts. For detailed information about these, refer to the Reference Manual (part number 2651A-901-01) on the Product Information CD-ROM that came with your instrument.

Section 1: Introduction

Model 2651A High Power System SourceMeter® Instrument User's Manual

CD-ROM contents

Two CD-ROMs are shipped with each Model 2651A order. The Model 2651A Quick Start Guide, User's Manual, and Reference Manual are provided in PDF format on the Model 2651A Product Information CD-ROM.

•Quick Start Guide: Provides unpacking instructions, describes basic connections, and reviews basic operation information. If you are new to Keithley Instruments equipment, refer to the Quick Start Guide to take the steps needed to unpack, set up, and verify operation.

•User's Manual: Provides application examples. If you need a starting point to begin creation of applications, refer to the User's Manual for a variety of specific examples.

•Reference Manual: Includes advanced operation topics and maintenance information. Programmers looking for a command reference, and users looking for an in-depth description of the way the instrument works (including troubleshooting and optimization), should refer to the Reference Manual.

A second CD-ROM contains the Test Script Builder script development software (Keithley Instruments part number KTS-850). Use this CD-ROM to install the Test Script Builder Integrated Development Environment. This software not only provides an environment to develop a test program, but also the ability to load the test program onto the instrument. Running a program loaded on the instrument eliminates the need to send individual commands from the host computer to the instrument when running a test.

Organization of manual sections

Bookmarks for each manual section have been provided in the PDF (see Adobe® Acrobat® or Reader® help for information about bookmarks). The manual sections are also listed in the Table of Contents located at the beginning of this manual.

Model 2651A applications

In addition to being a stand-alone instrument, the Keithley Instruments Model 2651A High Power System SourceMeter® Instrument can intelligently connect to other instruments and multiple devices. This manual provides application examples that guide you through several common instrument-to-instrument scenarios. These applications are presented after the summary information about the High Power System SourceMeter® Instrument, and include:

•Making basic front-panel measurements (on page 4-1): Demonstrates the basic measurement function using a single Model 2651A and a two-terminal device under test (DUT).

•Capturing high power pulse waveforms (on page 5-1)Capturing high power pulse waveforms: Demonstrates how to use the Keithley Instruments Model 2651A connected to a control computer. This example introduces configuration of the instrument's trigger model to make high-speed measurements of an LED.

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Model 2651A High Power System SourceMeter® Instrument User's Manual

Section 1: Introduction

•Characterization of power discretes (on page 6-1): Demonstrates how to use the Keithley Instruments Model 2651A with a second Series 2600A System SourceMeter® instrument to characterize power MOSFETs and IGBTs. This example introduces the interaction between two

instruments' trigger models. The application performs pulsed measurements, collecting IV curve data and placing it in a Microsoft® Excel® compatible file format for graphic and analysis.

•Increasing SMU current sourcing ability (on page 7-1): Demonstrates how to combine two

Keithley Instruments Model 2651A instruments with an additional Series 2600A System SourceMeter® instrument, and characterizes the resistance of a power MOSFET by sweeping current up to 100 A.

2651A-900-01 Rev. A / March 2011

1-3

		Section 2

	Using the front-panel interface
In this section:
Introduction ..............................................................................	2-1
Front panel ...............................................................................	2-1

Introduction

Before starting this section, complete the tasks outlined in the Model 2651A Quick Start Guide. Once you have completed those tasks, read this section, which provides enough basic information about the Model 2651A front-panel interface to work through the examples provided in this manual.

The front panel of the Keithley Instruments Model 2651A contains the following items:

(1)The POWER key

(2)The display

(3)The navigation wheel

(4)The OUTPUT ON/OFF control

(5)The setup and control keys

You can use the keys, display, and the navigation wheel to access, view, and edit the menu items and set values.

For additional information about the front panel, see the “General operation” section in the Model 2651A Reference Manual.

Front panel

The front panel of the Model 2651A is shown below.

Section 2: Using the front-panel interface Model 2651A High Power System SourceMeter® Instrument User's Manual

		Figure 1: Front panel
2		3
		3

ARM

+3.21000V

SrcA:+20.0000 A LimAL10.0000V

	SH	TO
P	U

T NE/TID

E
DI
T/E
	NT
	E
	R
	U	P
EOT	HS
EOT

2651A HIGH POWER SYSTEM SourceMeter ®

		7	8	9	+/-
		SRC	MEAS	LIMIT	MODE
	DISPLAY	4	5	6	0
POWER		4	5	6	0		AUTO	CURSOR
POWER		DIGITS	SPEED	REL	FILTER		AUTO	CURSOR
	CONFIG	1	2	3	0000		LOCAL
		LOAD	RUN	STORE RECALL		TRIG MENU	EXIT ENTER

UTPU
O	T
O	F


N / OF

1			4
	5

(1)The POWER key. Press this key to turn the instrument on (|). Press it again to turn the instrument off (0).

(2)The display. During operation, the display provides readings and information about the selected measurement and configuration. It also shows the control status (local or remote). If REM is displayed, the instrument is being controlled remotely (through GPIB, LAN, or USB). If REM is not displayed, control is through the front panel.

During setup, the display shows menu choices that you can use to configure the instrument.

The items listed below represent the possible display indicators and what they mean.

Indicator	Meaning

EDIT:	Unit is in the source editing mode
ERR:	Questionable reading or invalid calibration step
REM:	Unit is in remote mode
TALK:	Unit is addressed to talk
LSTN:	Unit is addressed to listen
SRQ:	Service request is asserted
REL:	Relative mode is enabled
FILT:	Digital filter is enabled
AUTO:	Source or measure autorange is selected
* (asterisk):	Readings are being stored in the buffer

(3)The navigation wheel . Turn the navigation wheel to scroll to a menu option or to change the selected value.

Push the navigation wheel to open menus or to select a menu option or a value. In most cases, pressing the navigation wheel performs the same action as pressing the ENTER key.

(4)The OUTPUT ON/OFF control. Press this control to turn the Model 2651A source output on or off. The output indicator will light when the source is on.

(5)The setup and control keys provide front panel control and configuration. The following figure illustrates each key's location. The table following the figure contains a definition of each key.

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Model 2651A High Power System SourceMeter® Instrument User's Manual

Section 2: Using the front-panel interface

Figure 2: Setup and control keys

	7	8	9	+/-
	SRC	MEAS	LIMIT	MODE
DISPLAY	4	5	6	0
	4	5	6	0		AUTO	CURSOR
	DIGITS	SPEED	REL	FILTER		AUTO	CURSOR
CONFIG	1	2	3	0000		LOCAL
	1	2	3	0000
	LOAD	RUN	STORE RECALL		TRIG MENU	EXIT ENTER

Key descriptions

Key	Description

DISPLAY	Toggles between the various source-measure displays and the user message mode.
CONFIG	Configures a function or operation.

SRC	Selects the source function (V or A) and places the cursor in the source field for
	editing.
MEAS	Cycles through measure functions (V, A, Ω, or W).

LIMIT	Places the cursor in the compliance limit field for editing. Also selects the limit value
	to edit (V, A, or W).
MODE	Directly controls the mode.

DIGITS	Cycles through display resolution (4-1/2, 5-1/2, or 6-1/2 digits).

SPEED	Selects either the fast or integrating A/D converter. When the integrating A/D
	converter is selected, this key also sets the measurement speed and accuracy by
	controlling the measurement aperture.
REL	Controls relative measurements. This allows a baseline value to be subtracted from
	a reading.
FILTER	Enables or disables the digital filter. You can use this filter to reduce reading noise.

LOAD	Loads test for execution.

RUN	Runs the last selected factory or user-defined test code.

STORE	Accesses reading buffers and takes readings.

RECALL	Recalls data (or statistics) from CHANA-BUFF1 or CHANA-BUFF2.

TRIG	Triggers readings.

MENU	Accesses the main menu. The main menu can be used to configure many facets of
	operation.
EXIT	Cancels selection and backs out of the menu structure. Also used as a LOCAL key
(LOCAL)	to take the unit out of remote operation.
ENTER	Accepts the current selection or brings up the next menu option. In most cases,
	pressing the ENTER key is the same as pressing the navigation wheel .
Number	When enabled, the number keys (0-9, +/-, 0000) allow direct numeric entry in the
keys	EDIT mode. Press the navigation wheel	to enter EDIT mode (see To change a
	value using the numeric keypad (on page 2-4)).

2651A-900-01 Rev. A / March 2011

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Section 2: Using the front-panel interface

Model 2651A High Power System SourceMeter® Instrument User's Manual

To change a value using the navigation wheel :

1.Turn the navigation wheel to go to the character you want to change (the character blinks when selected).

2.Press the navigation wheel to edit that character.

3.Turn the navigation wheel to change the value.

4.Press the navigation wheel to enter the change.

5.Repeat these steps as needed to change the value.

6.Press the ENTER key or the navigation wheel when finished changing all the characters.

To change a value using the numeric keypad:

NOTE

The numeric entry method may only be used if the numeric keypad is enabled.

1.If the keypad is disabled, press the MENU key, then select DISPLAY > NUMPAD > ENABLE.

2.Use the CURSOR arrow keys to move the cursor to the value that you want to edit.

3.Press any of the desired number keys (0-9, +/-, 0000). The cursor moves to the next value on the right.

4.Repeat the above steps as required to set the desired values.

5.Press the ENTER key to select the value or press the EXIT (LOCAL) key to cancel the change.

6.(Optional) Press the EXIT (LOCAL) key to return to the main menu.

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		Section 3

	Using the web interface
In this section:
Introduction ..............................................................................	3-1
Connect to the instrument web interface..................................	3-1
Web interface home page ........................................................	3-2
IP configuration tab ..................................................................	3-2
TSB Embedded........................................................................	3-3
Reading buffers........................................................................	3-7
TSP Express ............................................................................	3-8

Introduction

The Model 2651A web interface allows you to review instrument status, control the instrument, and upgrade the instrument over a LAN connection.

The instrument web page resides in the firmware of the instrument. Changes you make through the web interface are immediately made in the instrument.

Many examples in this manual and in the Model 2651A Reference Manual can be run through the TSB Embedded page of the instrument web interface.

Connect to the instrument web interface

NOTE

The instrument web interface requires the web browser plug-in JavaTM SE Runtime Environment Version 6 or later. The latest version of the plug-in is available from http://www.java.com/en/download/manual.jsp. Installation files are also available on the Model 2651A Product Information CD-ROM that came with your instrument.

The instrument web interface uses Java applets and, depending on your browser security settings, may require your permission to download and install them.

To connect to the instrument web interface, you must have a LAN connection from the computer to the instrument. See "LAN concepts and settings" in the Model 2651A Reference Manual for more information about configuring the Model 2651A for a LAN connection, connecting the Model 2651A to the LAN, and establishing a LAN connection to the instrument.

Section 3: Using the web interface

Model 2651A High Power System SourceMeter® Instrument User's Manual

Once the Model 2651A is configured correctly and connected to the LAN, you can use the LXI® Discovery Browser to identify the IP addresses of LXI certified instruments that are set up for automatic IP address selection. Once identified, you can double-click the IP address in the LXI Discovery Browser to open the web interface for the instrument. The LXI Discovery Browser is available on the Keithley Instruments website (http://www.keithley.com).

To locate the LXI Discovery Browser on the Keithley website:

1.Select the Support tab.

2.In the model number box, type 2651A.

3.From the list, select Software and click the search icon. A list of software applications for the Model 2651A is displayed.

4.See the readme file included with the application for more information.

For more information about the LXI Consortium, see the LXI Consortium website (http://www.lxistandard.org/).

Alternatively, use the following instructions to connect to the instrument web interface:

1.Confirm the LAN light on the instrument is illuminated. The LAN light is located on the rear panel as part of the LAN RJ-45 connector.

2.Open an Internet browser, such as Microsoft® Windows® Internet Explorer® (version 6.0 or later only).

3.If you do not know the IP address, press the MENU key on the instrument front panel and then select LAN > STATUS > IP-ADDRESS.

4.In the Address box of the Internet browser, enter the IP address of the instrument and press

Enter.

The home page of the instrument web interface is displayed.

Web interface home page

The Welcome page of the web interface gives you basic information about the instrument, including:

•The instrument model, serial number, firmware revision, calibration date, and LXI information

•An ID button to help you locate the instrument

•Links to the instrument web applications, including TSB Embedded, Reading Buffers, Flash Upgrade, and TSP® Express.

IP configuration tab

The IP Configuration tab provides access to the Model 2651A LAN settings. Refer to the Model 2651A Reference Manual for additional information about IP configuration.

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Model 2651A High Power System SourceMeter® Instrument User's Manual

Section 3: Using the web interface

NOTE

You must reload the page if you change the gateway or subnet mask from the Modify IP configuration page. If you change the IP address, you must type the new IP address in the address bar before you can use the web interface again.

Figure 3: Select IP configuration

TSB Embedded

TSB Embedded is a web application that includes a command-line interface that you can use to issue commands and interact with the instrument. TSB Embedded also provides a convenient way to create and manage user scripts. TSB Embedded resides in the instrument. You can use TSB Embedded to run some of the application examples in other sections of this manual. If you can access the web interface home page, but cannot use TSB Embedded (or TSP Express), make sure you have the JavaTM SE Runtime Environment (JRE) Version 6 or later installed on your computer.

Create a script using TSB Embedded

NOTE

If you are using TSB Embedded to create scripts, you do not need to use the commands loadscript or loadandrunscript and endscript.

2651A-900-01 Rev. A / March 2011

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Section 3: Using the web interface

Model 2651A High Power System SourceMeter® Instrument User's Manual

Exercise: Create and run a script with TSB Embedded

The following programming example illustrates the setup and command sequence of a basic source-measure procedure with the following parameters:

•Source function and range: Volts, autorange

•Source output level: 5 V

•Current compliance limit: 10 mA

•Measure function and range: Current, 10 mA

To create and run a sample script with TSB Embedded:

1.From the navigation on the left side of the web interface, select TSB Embedded. The TSB Embedded page is displayed.

Figure 4: Select TSB Embedded

2.To create the example script, enter the name of the TSP script: basic_source_measure at the location shown by (1) in the following illustration.

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Model 2651A High Power System SourceMeter® Instrument User's Manual Section 3: Using the web interface

Figure 5: TSB Embedded page

1 2 3

basic_source_measure

-- Restore Model 2651A defaults...

smua.nvbuffer1.clear() smua.nvbuffer1.appendmode = 1

3. Enter the code below in the script box (2).

--Restore Model 2651A defaults. smua.reset()

--Select voltage source function. smua.source.func = smua.OUTPUT_DCVOLTS

--Set source range to auto. smua.source.autorangev = smua.AUTORANGE_ON

--Set voltage source to 5 V. smua.source.levelv = 5

--Set current limit to 10 mA. smua.source.limiti = 10e-3

--Set current range to 10 mA. smua.measure.rangei = 10e-3

--Turn on output.

smua.source.output = smua.OUTPUT_ON

--Print and place current reading in buffer. print(smua.measure.i(smua.nvbuffer1))

--Turn off output.

smua.source.output = smua.OUTPUT_OFF -- Beep.

beeper.enable = beeper.ON beeper.beep(1, 1200) beeper.enable = beeper.OFF

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Section 3: Using the web interface

Model 2651A High Power System SourceMeter® Instrument User's Manual

NOTE

Commands and parameters for the Model 2651A are case-sensitive. It is important to type in the commands exactly as shown to avoid syntax and execution errors.

4. Click Save Script (3). The script is added to the User Scripts list on the left.

Quick Tip

Standard edit functions, such as copy, cut, and paste, work in TSB Embedded.

5.Clear the buffer (4):

•In the console, type the following and then press Enter. smua.nvbuffer1.clear()

•If successful, the command will appear in the Instrument Output box.

6.Set the buffer to append readings (4):

•In the console, type the following and then press Enter. smua.nvbuffer1.appendmode = 1

•If successful, the command will appear in the Instrument Output box.

7.Set the buffer to collect timestamps (4):

•In the console, type the following and then press Enter. smua.nvbuffer1.collecttimestamps = 1

•If successful, the command will appear in the Instrument Output box.

8.Run the script:

•Select the script in the User Scripts list.

•Click Run.

9.The Instrument Output box displays any error messages and output from the script.

10.If no errors appear, but readings do, click Run a few times to populate the buffer. Each time the script is run, readings appear in the Instrument Output box and are also placed in the buffer.

Script management options

Existing scripts are listed in the User Scripts box on the left side of the web interface. To delete a script, click the name of the script and click Delete. The script is deleted from the User Scripts list and from the nonvolatile memory of the instrument. To stop operation of a script, click Abort Script.

To export the selected script to the computer, click Export to PC. Choose the directory in which to save the script and click Save. Scripts are saved to a file with the extension tsp. TSP files are native to Test Script Builder or TSB Embedded, but they can be opened and edited in any text editor.

To import scripts from the computer, click Import to PC. Select the directory that contains the file. You can only import files with the extension tsp.

To clear the name box and the box that contains the script, click Clear. You can type the name of a script in the TSP Script box and click View Script to view the contents of the script.

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Section 3: Using the web interface

Reading buffers

The Reading Buffers tab provides access to the Model 2651A reading buffers. The data used in this example was created and placed in the buffer by the Exercise: Create and run a script with TSB Embedded (on page 3-4).

Exercise: Retrieve readings from a buffer

To retrieve readings from a populated buffer:

1.From the navigation area on the left side of the web interface, select Reading Buffers. The Reading Buffers embedded page is displayed.

Figure 6: Select reading buffer

2.Select smua.nvbuffer1 (1).

3.In the Recall Attributes area (near the bottom of the page), select Values and Time Stamp (2).

4.Click Download (3). The table displays the present buffer data.

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Model 2651A High Power System SourceMeter® Instrument User's Manual

Figure 7: Downloading the reading buffer

5.Notice that the Source Value column is not populated. To collect source values, before taking readings, use TSB Embedded to set the following attribute: smua.nvbuffer1.collectsourcevalues = 1.

Figure 8: Sample downloaded reading buffer

TSP Express

The TSP® Express tab provides access to the TSP Express Launch page. From this page, click the Launch button to start TSP Express.

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Section 3: Using the web interface

NOTE

Only one TSB Embedded or TSP Express session can be running and connected to the same instrument.

Figure 9: Select TSP Express

To run TSP Express:

1.From the navigation area on the left side of the web interface, select TSP Express. The TSP Express page is displayed.

2.Click the Launch button. The TSP Express window opens.

3.There is a help pane on the right side of the main window. You can adjust the width of the help pane by sliding the vertical bar. Click and follow the step-by-step example to become familiar with TSP Express (there is a link to the example in the TSP Express Introduction's first paragraph).

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