KEITHLEY Series 2600B System SourceMeter Instruments Instruction Manual

: June 7, 2024
: KEITHLEY

Table of Contents

KEITHLEY Series 2600B System SourceMeter Instruments
General Information
Installation instructions
Known issues
Version 3.2.2 Release
- Noncritical fixes
Version 3.0.4 Release
Version 3.0.1 Release
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

KEITHLEY Series 2600B System SourceMeter Instruments

product

General Information

Supported models

CAUTION: Do not install this firmware on Series 2600 (Models 2601, 2602, 2611, 2612, 2635, 2636), Series 2600A (Models 2601A, 2602A, 2611A, 2612A, 2635A, 2636A), or Series 2650A (Models 2651A, 2657A) instruments.

This firmware is intended for use on the following Keithley Instruments product models:
2601B, 2602B, 2604B,
2606B,
2611B, 2612B, 2614B,
2634B, 2635B, 2636B

Installation instructions

For detailed firmware installation instructions, refer to the “Upgrading the firmware” topic in the “Maintenance” section of the Series 2600B System SourceMeter® Instruments Reference Manual (document number: 2600BS-901-01). This manual is available online at https://www.tek.com/product-support. If you decide to upgrade the firmware in your instrument, follow the instructions in the manual. Alternatively, you can arrange to have Keithley Instruments upgrade your firmware at the factory by calling your local Keithley Instruments support office.

Upgrade considerations for all Series 2600B models
The following table lists the considerations that should be made when deciding whether to upgrade your Series 2600B instrument firmware to version 3.4.0.

Consideration for upgrade| From version 3.0.0| From version 3.0.1
3.0.3
3.0.4| From version 3.1.0| From version 3.2.1
3.2.2| From version 3.3.0
3.3.1
3.3.2
3.3.3
3.3.5
---|---|---|---|---|---
Recalibration required?| No| No| No| No| No
Backward compatibility concerns?| No| No| No| No| No
Requalification recommended?| No| No| No| No| No
Should you upgrade?| Yes| Review1| Review1| Review1| Review1

Review the entire list of changes made in all firmware versions between your present version and the version you are loading. Upgrade if any of the fixes or enhancements are needed.

Version 3.4.0 Release

Overview: Version 3.4.0 is an enhancement release of the Series 2600B firmware. This release provides one enhancement for the Models 2601B, 2602B, and 2604B.

Critical fixes

Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The embedded web applications (Virtual Front Panel, Flash Upgrade, TSB Embedded, and TSP Express) relied on an outdated and unsupported version of Java. Note that the new web applications are only functional if the LAN password is blank or disabled for the web interface.

Resolution: The Virtual Front Panel, Flash Upgrade, and TSB Embedded were re-implemented using modern web technologies. TSP Express was removed.

Enhancements: Added localnode. license to output the open source license information.
Example usage: print(localnode. license)

Known issues

Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The lan.reset() command is disabled when you are working in TSB Embedded. Sending lan. reset() in the TSB Embedded console results in the error message:
TSP? 1.10000e+03 Command unavailable 2.00000e+01 1.00000e+00

Workaround: Use another command interface to send lan.reset() or use the front-panel MENU option LAN > RESET.

Version 3.3.5 Release

Overview: Version 3.3.5 is an enhancement release of the Series 2600B firmware. This release provides one enhancement for the Models 2601B, 2602B, and 2604B.

Critical fixes: There were no critical fixes included in this release.

Enhancements

Models affected: 2601B, 2602B, 2604B

Enhancement: A new pulse region (Region 5) has been added to provide better pulse width and duty cycles for lower-voltage devices. This region allows operation up to 6 V and 5 A. The pulse specifications are shown in the following table.

Region

| Maximum current limit| Maximum pulse width| Maximum duty cycle
---|---|---|---
1| 1 A at 40 V| DC, no limit| 100%
1| 3 A at 6 V| DC, no limit| 100%
2| 1.5 A at 40 V| 100 ms| 25%
3| 5 A at 35 V| 4 ms| 4%
4| 10 A at 20 V| 1.8 ms| 1%
5| 5 A at 6 V| 10 ms| 10%

Refer to the 2600B System SourceMeter® SMU Instruments Datasheet for complete details on pulse specifications.

Noncritical fixes: There were no noncritical fixes included in this release.

Version 3.3.4 Release

Overview: Version 3.3.4 was never released.

Version 3.3.3 Release

Overview: Version 3.3.3 is an enhancement release of the Series 2600B firmware. This release provides one enhancement and a few noncritical fixes.

Critical fixes : There were no critical fixes included in this release. See the “Enhancements” and “Noncritical fixes” sections for more information about release content.

Enhancements

Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Enhancement: This release includes support for new internal flash memory devices found on digital board revision F or later, while maintaining support for the original flash memory on old hardware revisions. Hardware revisions that contain the new internal flash memory devices cannot be downgraded below firmware version 3.3.3. To determine the digital board revision, inspect the data returned by the print(localnode.info()) command. The DigBrdRev key contains the digital board revision.

Noncritical fixes

Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Resolution: This issue has been corrected.

PR46967
Models affected: 2602B, 2604B, 2606B, 2612B, 2614B, 2634B, 2636B

Symptom: The smuX. measure. Y() function in the form: smub. measure. iv(i Reading Buffer) causes the instrument to lock up, requiring a power cycle to resolve. Using the function in another form, such as smub. measure. iv(i Reading Buffer, vReading Buffer) does not result in a lockup.

Resolution: This issue has been corrected.

PR47029
Models affected: 2601B, 2602B, 2606B, 2611B, 2612B, 2635B, 2636B

Symptom:
When the source is off and smuX. source. off mode is set to smuX. OUTPUT_ ZERO, contact check operations will result in an inappropriate error code 5066, “source .off limit too low for contact check” if the effective current limit is less than 1 mA. In this off mode, smuX. source. off limit is ignored; instead, the effective current limit is initially determined by either:

The value of smuX .source. limit, if the channel is sourcing voltage when it is turned off
The greater of smuX. source. level or 10% of smuX. source. rangei, if the channel issourcing current when it is turned off

In either case, smuX. source. limit not smuX. source. off limit, is used to change the effective current limit when the output is off in smuX. OUTPUT_ZERO mode. As such, a more appropriate error code would be 5050, “I limit too low for contact check.”

PR47455
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom:
The source lowrange attributes should have no effect when sourcing the opposite function. However, when sourcing current, if the combination of smuX.source.lowrangev and smuX.source.rangei describes a point outside the SMU channel’s safe operating area, attempts to change the source configuration erroneously result in error code 5007, “Operation would exceed safe operating area of the instrument.” Similarly, when sourcing voltage, if the combination of smuX. source. lowrangei and smuX.source.rangev describes a point outside the SMU channel’s safe operating area, attempts to change the source configuration also erroneously result in error code 5007.

Workaround: The issue can be avoided by lowering the lowrange attribute.

Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The tspnet.tsp.rbtablecopy() function may return erratic results or make the instrument unresponsive.

PR47459
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument may fail to operate correctly after an “Out of memory” error. The instrument may ignore commands sent over the command interfaces and may ignore front panel operations.

Workaround: To avoid out-of-memory issues, you should leave 1 MB of dynamic memory available for instrument use. The mem info() function can be used to monitor the actual free memory remaining. When the free memory drops below 1000 KB, the instrument may encounter an “Out of memory” error. The Series 2600B System SourceMeter Instruments Reference Manual explains how to determine the amount of memory needed for reading buffers and sweeps.

PR47460
Models affected: 2601B, 2602B, 2606B, 2611B, 2612B, 2635B, 2636B

Symptom: When prompts are enabled, if a tsplink.reset() command initiated from another command interface is executing when the instrument receives an abort message, a prompt for the abort message may not be generated. The instrument will abort properly even though the prompt is not generated.

PR47461
Models affected: 2601B, 2602B, 2606B, 2611B, 2612B, 2635B, 2636B

Symptom: Aborting a tsplink.reset() command or aborting a script executing a tsplink.reset() command may take a long time because the tsplink.reset() command is allowed to complete before execution is aborted. The tsplink.reset() command may take several seconds when a large number of nodes are connected together.

PR47463
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument may incorrectly generate an “Out of memory” error when allocating a reading buffer. When there is insufficient memory to allocate the reading buffer, the garbage collector should automatically run to reclaim any unused memory before generating the “Out of memory” error. The garbage collector often fails to run, and the instrument issues an “Out of memory” error.

Workaround: To work around this issue, call the collect garbage() function prior to creating a new reading buffer.

PR47478
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: Pressing the Recall Buffer button in the virtual front panel when TSP® Express is active will cause the virtual front panel to generate a “Cannot open window: java. lan. Exception: Cannot read from instrument” error.

PR47479
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: TSB Embedded does not generate any errors or warnings when TSP® Express is active. The tool appears to work but will not show any saved scripts, nor will it run new scripts.

PR47482
Models affected: 2601B, 2602B, 2606B, 2611B, 2612B, 2635B, 2636B

Symptom: Executing a tsplink.reset() while overlapped measurements are in progress causes the instrument to become unresponsive.

PR47487
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: When using TSP-Net, timeouts may occur earlier than programmed. For example, with tsp net. timeout set to 5 seconds, the tspnet. read() function may actually time out after only 4.7 seconds.

PR47490
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: When loading a script using an invalid script name, the instrument loads the script as the anonymous script and does not generate an error.

PR47494
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: When nonprintable control codes are embedded in the text passed as parameters to display functions such as display.settext(), the control codes cause the display to malfunction. Some of the possible effects are:

The displayed text is corrupted.
The instrument beeps or buzzes.
The display shuts down and displays a “NO COMM LINK” message.

PR53798
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The front-panel USB host port becomes non-operational after inserting a flash drive and removing it within a span of approximately 2 seconds. The host port functionality is restored upon rebooting the instrument.

PR57534
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: LabVIEW sometimes reports a VISA error after a *CLS command is sent to the instrument.

PR61670
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: mDNS does not reliably discover the instrument.

Workaround: To work around this issue, use VXI-11 to discover the instrument.

PR61713
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The following functions do not have proper bounds checking: digio. write bit(), display. set cursor(), data queue. add(), data queue. next().

Version 3.3.2 Release

Overview: Version 3.3.2 is a maintenance release of the Series 2600B firmware. This release resolves one noncritical issue.

Critical fixes: There were no critical fixes included in this release. See the “Noncritical fixes” section for more information about release content.

Enhancements: There were no enhancements included in this release. See the “Noncritical fixes” section for more information about release content.

SYS172 Noncritical fixes
Models affected: 2601B, 2602B, 2606B, 2611B, 2612B, 2635B, 2636B

Symptom: The instrument front panel menu has TSPLINK listed twice, before and after UPGRADE. Both menu options work correctly.

Resolution: This issue has been corrected.

Version 3.3.1 Release

Overview: Version 3.3.1 is a maintenance release of the Series 2600B firmware. This release resolves one noncritical issue.

Critical fixes: There were no critical fixes included in this release. See the “Noncritical fixes” section for more information about release content.

Enhancements: There were no enhancements included in this release. See the “Noncritical fixes” section for more information about release content.

Noncritical fixes

PR61503
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: When using smuX. SETTLE_ DIRECT_IRANGE as the smuX. source. settling option, changing the source polarity with the instrument output off will result in the incorrect polarity setting when the output is turned back on.

Resolution: This issue has been corrected.

Version 3.3.0 Release

Overview: Version 3.3.0 is an enhancement release of the Series 2600B firmware. This release adds support for the model 2606B, provides one minor enhancement, and a few noncritical fixes.

Critical fixes: There were no critical fixes included in this release. See the “Enhancements” and “Noncritical fixes” sections for more information about release content.

Enhancements

E3301
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Enhancement: The instrument flashes the Channel Output LEDs while upgrading the firmware. This gives feedback on models without a front panel display for when firmware upgrade is complete, as well as additional feedback for models with a front panel display.

Noncritical fixes

PR58201
Models affected: 2601B, 2602B, 2604B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: When using the averaging filter, a measured value will incorrectly be reported as an overflow if the previous measurement was an overflow.

Resolution: This issue has been corrected.

PR61416
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument responds to unrecognized/unsupported RPC portmapper execution requests with a reply indicating the request was unsuccessful. As per RPC standards, the instrument should ignore the request and not send a reply.

Resolution: This issue has been corrected.

PR61417
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument sends an invalid reply to an RPC Dump command request.

Resolution: This issue has been corrected.

PR61418
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: Invalid RPC packets can cause the instrument to generate a fatal exception.

Resolution: This issue has been corrected.

PR61419
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument will execute commands received on a socket connected to the Dead Socket Termination port. The only commands that should be processed are password commands and *idn? queries.

Resolution: This issue has been corrected.

PR61419
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: The instrument will execute commands received on a socket connected to the Dead Socket Termination port. The only commands that should be processed are password commands and *idn? queries.

Resolution: This issue has been corrected.

PR61420:
Models affected: 2601B, 2602B, 2604B, 2606B, 2606B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B.

Symptom: The instrument will accept multiple socket connections. Any commands sent on those connections are held and executed when the first connection is closed. It appears that the instrument is not responding, but all queued commands will be executed later, which can cause unexpected results.
Resolution: This issue has been corrected.

Version 3.2.2 Release

Overview
Version 3.2.2 is a maintenance release of the Series 2600B firmware. This release resolves one noncritical issue.
Noncritical fixes

PR49204 PR57201
Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Symptom: With open leads, rapidly executed contact check measurements erroneously return a reading of 0 ohms, instead of the expected reading of 9.91E+37.

Resolution: This issue has been corrected.

Version 3.2.1 Release

Overview: Version 3.2.1 is a release for internal purposes only. This version provides the same functionality as version 3.1.0.

Version 3.2.0 Release

Overview: Version 3.2.0 was never released

Version 3.1.0 Release

Overview
Version 3.1.0 is an enhancement release of the Series 2600B firmware. This release provides two enhancements and one noncritical fix.
Critical fixes
There were no critical fixes included in this release. See the “Enhancements” and “Noncritical fixes” sections for more information about release content.
Enhancements
PR47031
Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B.
Enhancement:
The QYE, DDE, EXE, and CME bits in the Standard Event Status register of the status model are now set on the master node in addition to the remote node when a remote node generates an error that is logged to the error queue of the master node.

PR54004

Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B.
Enhancement: The front-panel USB port now supports interfacing to mobile devices running the Android platform.

Noncritical fixes

PR47032

Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B.

Symptom:
When certain errors are generated, the bit set in the Standard Event Status register of the status model does not match the bit dictated by the SCPI standard. For example, some errors cause the EXE bit to be set but the SCPI standard dictates that the DDE bit be set for that error.

Resolution: This issue has been corrected.

Version 3.0.4 Release

Overview
Version 3.0.4 is a maintenance release of the Series 2600B firmware.
Critical fixes
Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: A voltage measurement triggered within 85 μs of a voltage measurement range change operation may not meet the accuracy specifications of the instrument.
Resolution: This issue has been corrected.

Enhancements: There were no enhancements included in this release. See the “Critical fixes” and “Noncritical fixes” sections for more information about release content.

Noncritical fixes

PR50614

Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: In the KIPulse factory script, the step size ratio b is calculated incorrectly in functions Config Pulse Measure VS weep Log and Config Pulse Measure Sweep Log.
Resolution: This issue has been corrected.

PR50743

Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: When sourcing voltage and measuring current with measure auto ranging enabled, if the current flowing through the SMU terminals momentarily exceeds a setpoint of approximately 100 mA, the next reading will occur on the 1 A range or greater, even if a smaller range would be more appropriate for the signal. The auto ranging routine resumes its expected behavior on the following reading.
Resolution: This issue has been corrected.

PR51312 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B.
Symptom: Series 2600B web applications do not work in Internet Explorer 11. Running any of these web applications brings users to a Keithley support login website.
Resolution: This issue has been corrected.

PR51313 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: When running a Series 2600B web application, a Java security prompt may ask for your confirmation for running the application. An incorrect application name is shown on the security dialog box.
Resolution: This issue has been corrected.

PR51314 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: Series 2600B web applications (Flash Upgrade, TSB Embedded, Virtual Front Panel, and TSP Express) are blocked from running in Java version 7 update 51 because the JAR file manifest does not contain the Permissions attribute.
Resolution: This issue has been corrected.

PR51328 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: The links to download Java plugin on Series 2600B web applications is broken.
Resolution: This issue has been corrected.

PR51349 Models affected: 2601B, 2602B, 2604B
Symptom : Attempting to sweep current using the smuX .trigger.initiate() command erroneously fails with error 802, “OUTPUT blocked by interlock”, if and only if the voltage limit exceeds 20 V.
Resolution: This issue has been corrected.

Version 3.0.3 Release

Overview
Version 3.0.3 is a maintenance release of the Series 2600B firmware. This release provides two minor enhancements and resolves a few noncritical issues.
Critical fixes: There were no critical fixes included in this release. See the “Enhancements” and “Noncritical fixes” sections for more information about release content.
Enhancements

PR46007 PR49024 Models affected: 2611B, 2612B, 2614B, 2634B, 2635B, 2636B

Enhancement: Bit 10 of the status questionable register now functions as the HIGHV_NOT_READY bit. When this bit is set, it indicates that either the interlock is not engaged, or that the interlock was engaged recently and the high voltage supply is still stabilizing. If the interlock is engaged and this bit is set, attempting to turn on the output on the 200 V range will result in error code 5052, “Interlock engaged; system stabilizing.”

PR48808 PR48812 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Enhancement: Keithley has updated its digital signature on all of its Series 2600B Java web applications (TSP Express, TSB Embedded, Flash Upgrade, and Virtual Front Panel) to a stronger 2048-bit certificate.

Noncritical fixes
PR48755 PR48911 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: Rarely, when running a sweep with the smuX. trigger. source. stimulus attribute set to a value other than zero, the sweep may halt unexpectedly before executing the source action.
Resolution: This issue has been corrected.

PR49406 PR50283 Models affected:
2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: If smuX. trigger .measure. stimulus is nonzero, and smuX. trigger. measure .action is set to smuX. ENABLED, then measurement overruns are not reported.
Resolution: This issue has been corrected.

PR49413 PR50284 Models affected: 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom : If smuX. source. autorangev is set to 1 and the interlock is not engaged, voltage sweeps that cause the SMU to change to the 200 V source range improperly execute without error. Instead, the execution attempt should fail with error code 802, “OUTPUT blocked by interlock.” Note that the SMU output does not actually exceed safe voltage levels when this issue occurs.
Resolution: This issue has been corrected.

PR50402 PR50432 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom : When communicating with the instrument over the USB interface, occasionally you will not be able to read all the generated output and will see unexpected “Query UNTERMINATED” error messages.
Resolution: This issue has been corrected.

Version 3.0.2 Release
Overview: Version 3.0.2 was never released.

Version 3.0.1 Release

Overview
Version 3.0.1 is a maintenance release of the Series 2600B firmware. This release resolves one critical issue and two noncritical issues.
Critical fixes
PR47324 PR47349 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: When smuX.source.offmode = smuX.OUTPUT_ZERO and smuX.source.offfunc = smuX.OUTPUT_DCAMPS, turning the SMU off leaves the hardware in an invalid state. The effective voltage in this state is:

The value of smuX.source.levelv if smuX.source.func is set tosmuX.OUTPUT_DCVOLTS
The value of smuX.source.limitv if smuX.source.func is set tosmuX.OUTPUT_DCAMPS
The effective current limit in this state is unpredictable, but can exceed the standard operating area of the SMU.

Resolution: This issue has been corrected.

Enhancements: There were no enhancements included in this release. See the “Critical fixes” and “Noncritical fixes” sections for more information about release content.
Noncritical fixes
PR47316 PR47375 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B
Symptom: When setting smuX.sense to smuX.SENSE_CALA, the effective source range is determined by the smuX.measure.rangeY setting instead of the smuX.source.rangeY setting. To properly calibrate range R, smuX.measure.rangeY must be set to R before setting smuX.sense to smuX.SENSE_CALA.
Resolution: This issue has been corrected.

PR47411 PR47412 Models affected: 2601B, 2602B, 2604B, 2611B, 2612B, 2614B, 2634B, 2635B, 2636B.

Symptom: In TSP® Express, running tests with high capacitance mode enabled generates error code 5069, “Autrorange locked for HighC mode,” for the following configurations: