Keithley 2450 Reference Manual page 176

Model 2450 Interactive SourceMeter® Instrument Reference Manual
Using TSP commands:
The following attributes are available for each reading buffer (for example, rb.dates accesses dates
for reading buffer rb, and the number of readings in the reading buffer is accessed as rb.n).
Attribute
bufferVar.n
bufferVar.readings
bufferVar.dates
bufferVar.statuses
bufferVar.formattedreadings
bufferVar.sourceformattedvalues This attribute contains the source levels formatted as they
bufferVar.sourcevalues
bufferVar.sourcestatuses
bufferVar.times
bufferVar.timestamps
bufferVar.relativetimestamps
bufferVar.sourceunits
bufferVar.seconds
bufferVar.fractionalseconds
Reading buffer time and date values
Time and date values are represented as a number of UTC seconds since 12:00 a.m. Jan. 1, 1970.
Use the following commands to return values in the following formats:
•
Hours and minutes:
•
UTC seconds:
•
Month, day, year, format, or to access the timestamp table:
2450-901-01 Rev. B/September 2013
Description
This attribute contains the number of readings in the specified
buffer. See
This attribute contains the readings stored in a specified
reading buffer. See
This attribute contains the dates of readings stored in the
reading buffer. See
This attribute contains the status values of readings in the
reading buffer. See
This attribute contains the stored readings formatted as they
appear on the front-panel display. See
bufferVar.formattedreadings
appear on the front-panel display when the readings in the
reading buffer were acquired. See
bufferVar.sourceformattedvalues
This attribute contains the source levels being output when
readings in the reading buffer were acquired. See
bufferVar.sourcevalues
This attribute contains the source status conditions of the
instrument for the reading point.
page 8-29).
This attribute contains the time when the instrument made the
readings. See
This attribute contains the timestamps of readings stored in
the reading buffer. See
This attribute contains the timestamps, in seconds, when each
reading occurred relative to the timestamp of reading buffer
entry number 1. See
25).
This attribute contains the units of measure of the source. See
bufferVar.sourceunits
This attribute contains the nonfractional seconds portion of the
timestamp when the reading was stored in UTC format. See
bufferVar.seconds
This attribute contains the fractional portion of the timestamp
(in seconds) when each reading occurred. See
bufferVar.fractionalseconds
bufferVar.times (on page 8-34)
bufferVar.seconds (on page 8-26)
Section 3: Functions and features
bufferVar.n (on page 8-23).
bufferVar.readings
bufferVar.dates (on page 8-18).
bufferVar.statuses (on page 8-33).
(on page 8-20).
(on page 8-28).
(on page 8-32).
bufferVar.sourcestatuses
.bufferVar.times (on page 8-34).
bufferVar.timestamps
bufferVar.relativetimestamps
(on page 8-30).
(on page 8-26).
(on page 8-21).
bufferVar.dates
(on page 8-24).
(on
(on page 8-35).
(on page 8-
(on page 8-18)
3-31