Measure[:<Function>]; [:Sense[1]]:Data:fresh - Keithley 2701 User Manual

3-60 Basic DMM Operation
:MEASure[:<function>]?
What it does
This query will reconfigure the instrument to the function specified in the query, set the
trigger source for immediate, set the trigger count to 1, and configure the measurement
parameters to *RST defaults. It will then trigger a single reading, and return the result.
Limitations
This query is much slower than a :READ? or :FETCh? query because it has to reconfigure
the instrument each time it is sent. It will reset the NPLC, autoranging, and averaging to
default settings.
When appropriate
This is an ideal command for taking one-shot measurements if the default settings for a
measurement are appropriate and speed is not a requirement.

[:SENSe[1]]:DATA:FRESh?

What it does
This query is similar to :FETCh? in that it returns the latest reading from the instrument,
but it has the advantage of making sure that it does not return the same reading twice.
Limitations
Like the :FETCh? query, this command does not trigger a reading.
When appropriate
This is a much better choice than the :FETCh? query because it cannot return the same
reading twice. This would be a good query to use when triggering by BUS or
EXTERNAL, because it will wait for a reading to complete if a reading is in progress.
The :CALC:DATA:FRESh? query is similar to the :DATA:FRESh? query, but applies to
readings that have math applied to them (e.g.:MX+B scaling).
Model 2701 User's Manual