Section 7: Command reference
Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-4
2651A-901-01 Rev. A / March 2011
Time and date values
Time and date values are represented as the number of seconds since some base. Representing
time as a number of seconds is referred to as “standard time format.” There are three time bases:
•
UTC 12:00 am Jan 1, 1970.
Some examples of UTC time are reading buffer base timestamps,
adjustment dates, and the value returned by
os.time()
.
•
Instrument on.
References time to when the instrument was turned on. The value returned by
os.clock()
is referenced to the turn-on time.
•
Event.
Time referenced to an event, such as the first reading stored in a reading buffer.
Using the command reference
The command reference contains detailed descriptions of each of the commands you can use to
control your Model 2651A. Each command description is broken into several standardized
subsections. The figure below shows an example of a command description.
Figure 92: Example instrument control library description
Each command listing is divided into five major categories of information about the command:
•
Command name and standard parameters table
•
Usage
•
Details
•
Example
•
Also
see
The content of each of these categories is described in the following topics.
