User manual

Fluke DAQ
Users Manual
Instrument Data Storage (2638A and 1586A)
Selections in this section determine if or where the
instrument will store scans in addition to the named CSV
data file stored on the PC. None: data is only sent via
remote port to the PC and scan date is not retained in the
instrument. Internal: scans are also stored in internal
memory.
Sample Rate
Fast, medium, and slow refer to the A/D measurement
sample rate for the specific instrument selected: 2638A,
2645A, 2680A-PAI, etc. As a general rule, faster sampling
returns slightly less accurate readings that may include
more noise figures than slow sample rates. The Custom
setting is found only on the 2638A. When custom is
selected for an instrument mainframe, any channel may
have a custom sample speed. The value set in the
custom window on each channel is NPLC (Number of
Power line Cycles). The default is 10. Refer to the
product manual for specifications relating to various
sample speeds.
Log to PC Card (2686A only)
• Never
Ignore the PC card (default setting).
• Always
Always write to the PC card. This selection is useful
for stand-alone applications or when data backup is
necessary.
Note
When the card is full, an error message is
generated and scanning stops.
The Software does not write or read data from the 2638A
USB memory device. All interactions from the Software to
the 2638A are to the internal memory of the 2638A.
• Trigger Out (2680A and NetDAQ only)
Used to specify a Trigger Out module. Trigger out is
the physical Trigger output of a 268XA device. It is
the Trigger Out signal out on the rear panel
connector of the mainframe. To set up a
master/slave relationship, set a module in a 268XA
device to control the Trigger Out signal and wire that
signal to the Trigger In of all the slave devices. It will
then be necessary to configure a module in a slave
device to take a reading when an External Trigger is
received. The External Signal is the same as the
physical Trigger In located on the back of the
mainframe.
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