The instrument will become unresponsive if a LAN cable is disconnected and reconnected nine times or more.
A power cycle is required to make the instrument responsive.

 This issue has been resolved.

• New commands have been added to control the connection rule for closing and opening channels in the instrument:
• TSP: channel.connectrule (default channel.CONCURRENT) SCPI: :ROUTe[:CHANnel]:CONNect:RULE (default CONCurrent)
• The connection rule describes the order in which switch channels are opened and closed during channel operations. This applies to scanning operation and when using these commands when a channel is set to a function.
• The default value does not guarantee a connection rule. The instrument closes relays as efficiently as possible to improve speed performance without applying a rule.
• When the connection rule is set to break before make, the instrument ensures that all switch channels open before any switch channels close.
• When the connection rule is set to make before break, the instrument ensures that all switch channels close before any switch channels open.

For additional information on these commands, refer to the Model DAQ6510 Data Acquisition and Multimeter System Reference Manual (document number DAQ6510-901-01). This manual is available online at tek.com/keithley.

 Resolution:

Running a scan with the automatic scan restart feature enabled and restarting the trigger model periodically may lead to an out of memory error message, depending on how often the trigger is reinitialized.

The error may also occur when saving numerous configuration scripts or system setups, depending on the time since the instrument has been restarted.

 This issue has been resolved.

 Resolution:

When scanning with four-wire measurements on a channel followed by two-wire measurements on a subsequent channel with a 7706 or 7707 card installed, the first scan results in correct measurements for the four- wire channel, but incorrect four-wire channel readings for subsequent scans.

This error is caused by an upper-bank channel closing improperly when stepping from one channel to another, interfering with the readings for the second scan loop and any subsequent loops.

 This issue has been resolved.

 Resolution:

When writing a large amount of reading buffer data to a USB drive, a newline character (\n) may be missed and result in two data rows being written as one row.

 This issue has been resolved.

Resolution:

The MAV bit may be set in the status byte indicating that there is data to be read from the instrument, but the subsequent read operation to pull that data from the instrument fails and times-out. This may occur when rapidly generating data and enabling the MAV bit to be set in the status model to indicate when data is available to read from the instrument.

 This issue has been resolved.

• NS-1946
• New commands have been added:
• TSP: lan.dstprotection = lan.ON or lan.OFF
• SCPI: SYSTem:COMMunication:LAN:DST:PROTection <ON (1) or
• OFF(0)>
• OFF is the default command state.
• When DST protection is turned OFF, a simple open-and-close on the DST port (5030) will close any and all open LAN connections.
• When DST protection is turned ON, the DST port will need to be opened and the system login and password entered followed by closing the DST port to close any open LAN connections, including the DST port.
• Turning DST protection ON prevents LAN connections from being inadvertently closed by your IT department performing a port scan across the corporate network.

 Resolution

After configuring a scan in SCPI 2700 or SCPI 2701 emulation mode, the READ? command closes the first channel and takes a reading, then advances to the second channel in the scan list. Subsequent READ? commands do not advance the scan to the next channel in the list. The subsequent READ? commands respond with a reading being measured on the second channel in the scan sequence and not on the expected channel.

 This issue has been resolved.

Resolution:

In SCPI 2701 emulation mode, a user cannot send a channel list parameter that worked for a Model 2701. The -154, string too long error is generated.

 This issue has been resolved.

 Resolution:

While running a test loop in an application that sends the reset() command as part of the code, a blue screen appears after running the test for several days.

 The issue has been resolved.

 Resolution:

While remotely communicating with the instrument, if a new error is displayed on the front panel shortly after a previous error is being cleared from the front panel, the instrument may become unresponsive or inoperative.

 The issue has been resolved.

  Resolution:

When recalling a saved system configuration containing four-wire measurement scan channels, the setup returns Error 1115: “Parameter error: no paired channels accepted.”

This issue has been resolved.

 Resolution:

After running a scan and then disabling a channel group from the scan on the front panel, running the scan again returns Error -285 TSP: “Syntax error at a line due to an unfinished string.”

The issue has been resolved.

 Resolution:

When appending buffer data to a .csv file using the buffer.saveappend command, the line with channel numbers is shifted over to start with the time column instead of starting with channel data columns, as the line for channel labels does.

 This issue has been resolved.

 Resolution:

Changing an annunciator setting (such as auto zero or filter enable) on the Settings or Calculations screen is not reflected in the Home screen annunciators.

 This issue has been corrected.

Resolution:

The internal system clock battery is drained when the instrument is not plugged in for several months or longer, causing the instrument to lose the current time and date when powered on. The instrument battery must then be replaced.

 This issue has been corrected.

• NS-1931: Added a TLS (transport layer security) option when using the
• tspnet.connect() command.
• connectionID = tspnet.connect(ipAddress, portNumber, initString, useTLS)
• ipAddress: A string that indicates the IP address or host name to connect to.
• portNumber: Default 5025.
• initString: Sends a string to ipAddress. useTLS: 0 or 1;
• 0: Do not use TLS with the connection (default)
• 1: Use TLS with the connection.

When useTLS is set to 1, the instrument negotiates the security protocol when connecting to the host or IP address that is used. This security protocol is used when using tspnet.write() to send data or tspnet.read() to receive data.

The following is an example of how to use a host name with the TLS option:

connectionID = tspnet.connect(“ hostname.domain.com ”, 443, “”, 1)

• Reading buffer memory management now allows users to easily allocate the largest size available when creating a reading buffer.
• Added a method to clear the active buffer by pressing the MENU + EXIT keys.
• When selecting the active buffer, an option now exists to create a new user buffer.
• Added the display.active buffer TSP remote command and DISPlay:BUFFer: ACTive SCPI command to specify the active buffer for the instrument using remote commands.

• Added the ability to use remote commands to store inactive measure function settings in a configuration list index.
• Added the ability to use remote commands to query or configure inactive measure function attributes.

• Added a method to automatically install any scripts to internal storage memory that resides in an autoinstall directory on the USB drive when inserted into the instrument.
• Added fs.* TSP commands for accessing and managing file system settings.
• Added remote commands to set continuous measurement.
• Added an outside high and low limit option for scan monitor mode.

• Graph and Histogram settings are now shared for ease of viewing data between the two screens. Also added other graphing enhancements.

• The maximum TSP node ID is now 63. The previous maximum was 64.

 Resolution:

5T5T he instrument potentially performs make-before-break relay connections instead of break-before-make for 7701, 7708, and 7709 cards when scanning certain channels.

5T5T his issue has been corrected.

5N5T S-1016

 Resolution:

• 5U5T sing the Keithley Model 7701, 7706, or 7708 to make measurements may result in overflows and inaccuracies when, without opening all of the channels in between, you make a 2-wire measurement followed by a 4-wire measurement or a 4-wire measurement followed by a 2-wire measurement. A scan with both 2-wire and 4-wire measurements may be inaccurate after the change in function has occurred.
• 5A5T  scan with a single function, either 2-wire or 4-wire measurements, would contain accurate measurements. The USB interface may exhibit lockups when used for extended periods.
• 5T5T he 7701, 7706, or 7708 now make accurate measurements for all combinations of 2-wire and 4-wire measurements, whether in a scan, script, or from the display.

• Emulation of the Keithley Model 2700 and 2701 now uses the same version of the moving average filter as the original products. This type of filter is also available in non-emulation modes under the name Hybrid Average filter. Channels do not support the hybrid filter type.
• A hybrid filter combines characteristics of the repeating and moving filter types. A hybrid filter always averages an entire window of readings before returning the requested filtered reading. If the window is empty when the first reading is triggered, multiple readings are made to fill the window, after which the single requested filtered reading is returned. This process may take longer than a single reading. Once the window is filled, subsequent triggers make a single reading, add it to the window, and return the single requested filtered reading. This process will take the duration of a single reading.
• The TSP and SCPI commands for these filter-type options are
• 4d2T mm.measure.filter.type  dmm.FILTER_HYBRID_AVG and
• [SENSe[1]]:<function>:AVERage:TCONtrol:  HYBRid.

4:2T55T DISPlay:BUFFer:ACTive42Tc55T ommands.

4:2T55T TRACE:WRITE:FORMAT42Tc55T ommand.