Data Logger View

In the Data Logger view, the computer's clock controls measurement start/stop/interval, and readings are stored in a data log on the computer.

During data logging, a chart will be plotted only if the sample size is more than 1.

While not connected to an instrument, you can load a previously-stored Data Log file from your computer. For more information, see Load Offline Data Log.

Data Log Name

The default file name consists of the DMM model number followed by "Data Log", the date, current time, and a numeric index. For example, 34411A Data Log 2021-09-20 11-40-26 31.

By default, data logs are stored in the "Documents" folder on your computer and are organized by instrument type.
For example – C:\Users\<user_name>\Documents\Keysight\PathWaveDMM\Data Logs\.

To change the default name, click to open the file name editor. You can edit the prefix name and also have the option to include or exclude the date, current time, and numeric index. The date is in the form YYYY-MM-DD and the time is in the form HH-mm-ss (24-hour time format). For example, <model> Data Log 2021-09-20 11-40-26 31 – September 20, 2021 at 11:40:26 a.m. with a numeric index of 31.

If included, the date, time, and numeric index fields are automatically updated with each subsequent data log operation from this application.
The date and time fields are based on your computer's internal clock setting.
The data log is stored with a .IVIF file extension.

Start Data Logging

Immediately with Start Button - Start data logging when you click the "Start" button.

At Specific Time - Start data logging at a specific time and date. Enter the desired date in the form YYYY (year), MM (month), and DD (day). Enter the desired time in the form HH (hours), mm (minutes), and ss (seconds).

On External Trigger (one per reading) - Trigger on a negative-going (falling) edge of an external signal on the DMM's Ext Trig connector (external triggering is not supported on the Keysight 34401A DMM).

Sample Interval

Enter the desired interval between samples in the form DD (days), HH (hours), mm (minutes), ss (seconds), and ms (milliseconds). Select Minimum to select the shortest interval based on the instrument's current settings.

Stop Data Logging

Immediately with Stop Button - Terminate data logging when you click the "Stop" button.

After Elapsed Time - Terminate data logging after the specified amount of time has elapsed. Enter the desired duration in the form DD (days), HH (hours), mm (minutes), and ss (seconds).

After Number of Samples Acquired - Terminate data logging after a specific number of samples have been taken (the minimum number of samples is 2).

Limit Testing

Check readings against upper and lower limits. A limit failure occurs when the measured signal goes above the upper limit, or below the lower limit.

Enable Limit Testing - Check here to enable limit testing. If enabled, a warning message is displayed on the Notifications for each limit failure.

Upper Limit - Specify the upper limit in the units of the selected measurement (must be greater than the lower limit). You can also use limit markers as described below.

Lower Limit - Specify the lower limit in the units of the selected measurement (must be less than the upper limit). You can also use limit markers as described below.

Actions to Take When Limit Reached

Send Computer Beep - The PC beeps on each limit failure.

Send E-mail Message - Sends an e-mail to the specified recipient upon the first limit failure (multiple failures per test result in just one e-mail). Click to specify an e-mail recipient.

Execute Batch File - Execute a custom batch file upon first limit failure (multiple failures per test result in executing the batch file just once). After enabling this mode, click Browse to locate and select the batch file that you have created.