Keysight 34460A, Руководство по эксплуатации и обслуживанию

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Data Log Mode
The Data Log mode is standard on the 34465A and 34470A only, as is available only from the DMM's front
panel. Data Log mode provides a front–panel user interface that allows you to set up data logging into the
instrument’s non–volatile memory, or to internal/external file(s), without programming, and without a con-
nection to a computer. Once you have finished collecting data, you can view it from the front panel, or you
can transfer the data to your computer. Data Log mode allows you to log a specified number of readings,
or readings acquired for a specified period of time, to instrument memory or to internal or external data
files.
To select Data Log mode, press [Acquire] Acquire > Data Log . You can then select the Sample Interval
(time between measurements - for example, 500 ms), Duration as either an amount of Time or a number of
Readings, whether to Start after a Delay or at a specific Time of Day, and whether to Log to Memory or Log
to File(s). After configuring the data logging parameters, press
[Run/Stop] . Data logging will begin fol-
lowing the specified Delay or at the specified Time of Day.
Loss of data possible - local to remote transition clears instrument memory:
When
data logging or digitizing to memory , if you access the instrument from remote (send a SCPI
or common command)* and then return to local (by pressing
[Local]
), the readings in
memory are cleared and the instrument returns to Continuous mode.
For data logging only, you can prevent this situation by data logging to a file instead of to
memory (see
Data Log Mode for details). You can also prevent this from happening for data
logging or digitizing by taking steps to keep the instrument from being accessed from
remote. To prevent remote access, you may want to disconnect the LAN, GPIB, and USB
interface cables from the instrument before starting the measurements. To prevent remote
access via LAN, you can connect the instrument behind a router to minimize the possibility of
remote access. You can also disable the various I/O interfaces from the front panel menus
under
[Utility]
>
I/O Config
.
To view the status of a data logging or digitizing operation remotely, use the instrument’s
Web User Interface . The Web User Interface monitor does not set the instrument to remote.
*When accessed from remote, the instrument will continue data logging or digitizing to completion, and you can
retrieve the readings from remote.
Data Log Mode Features
l
The Data Log mode is available for DC voltage, DC current, AC voltage, AC current, 2-wire and 4-wire
resistance, frequency, period, temperature, capacitance, and ratio measurements. The Data Log mode
is not available for the continuity or diode functions.
l
The maximum data log rate is 1000 readings/sec. Note: The maximum reading rate may be limited by
settings already configured when entering data log mode (particularly NPLC settings for DC and res-
istance measurements). In this situation, press the measurement function key (for example, DCV) and
decrease the aperture setting (either NPLC or Time).
Keysight True
volt
Series Operating and Service Guide
181
Measurement Tutorial