l
Data Log mode settings and measurement settings interact. These include the sample interval, des-
tination (memory or file), measurement function, NPLC, Aperture, Autorange, Autozero, Offset Com-
pensation, AC Filter, TC Open Check, and Gate Time. When you specify data log settings that conflict
with present settings, the instrument displays a message, and in most cases, adjusts settings to legal
values. For example, if you configure data logging for more readings than can be saved to reading
memory, the instrument displays a message and reduces the maximum number of readings. When
you see a displayed message, such as
The data logging Sample Interval increased
, you can press
Shift > Help > 1 View the last message displayed > Select
to view more information.
l
The maximum data logging duration is 100 hours, the minimum is 1 second.
l
By default, data logging implements auto trigger. The level and external trigger sources are not sup-
ported for data logging.
l
When the data log mode is running,
•
Data Logging
flashes near the top of the display, and the log file
path (when data logging to a file) remaining time, and remaining samples is displayed near the bottom
of the display.
l
You can store data logging readings in volatile memory for display or write the readings to one or
more files.
l
When data logging to memory, the data is volatile (not remaining during power off) but can be saved
to an internal or external file after data logging is complete. The number of readings you can store in
memory depends on the MEM option. With the MEM option, the limit is 2,000,000 readings. Without
the MEM option, the limit is 50,000 readings.
l
When data logging to file(s):
l
You can append the data logging start date and time to the file name using the format: _
YYYYMMDD_HHMMSS. For example, for a file named
Data
, the result will be similar to
Data_
20140720_032542.csv
.
l
You specify internal or external and a file name. If more than one file needs to be created to hold
the data, the second filename will be appended with _00001, the third filename with _00002, and
so on. When data logging to files, the maximum number of readings you can data log to files is 100
hours x 1000rdgs/sec =360,000,000.
Measurement Tutorial
182
Keysight True
volt
Series Operating and Service Guide
