Keithley System SourceMeter 2601B, Справочное руководство

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Series 2600B System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2600BS-901-01 Rev. B / May 2013 7-183
If
n
equals zero (0), all other attributes are
nil
. If
n
equals 1, the
stddev
attribute is
nil
because the standard
deviation of a sample size of 1 is undefined.
The
min
and
max
entries each have the attributes defined in the following table.
Attribute Description
measurefunction
String indicating the function that was measured for the reading (current, voltage,
ohms or watts)
measurerange
The full-scale range value for the measurement range used when the measurement
was made
reading The reading value
sourcefunction String indicating the source function at the time of the measurement (current or
voltage)
sourceoutputstate
String indicating the state of the source (off or on)
sourcerange
Full-scale range value for the source range used when the measurement was made
sourcevalue
If
bufferVar .collectsourcevalues
is enabled, the sourced value in effect at
the time of the reading
status
Status value for the reading; the status value is a floating-point number that encodes
the status value into a floating-point value
timestamp
If
bufferVar .collecttimestamps
is enabled, the timestamp, in seconds,
between when the reading was acquired and when the first reading in the buffer was
acquired; adding this value to the base timestamp will give the actual time the
measurement was acquired
Also see
smuX.buffer.recalculatestats() (on page 7-183)
smuX.buffer.recalculatestats()
This function recalculates the specified reading buffer's statistics.
Type TSP-Link accessible Affected by Where saved Default value
Function Yes
Usage
smu X .buffer.recalculatestats( bufferVar )
X Source-measure unit (SMU) channel (for example,
smua.buffer.recalculatestats()
specifies SMU channel A)
bufferVar The reading buffer to process
Details
This function causes the SMU to regenerate the reading buffer statistics about the specified reading buffer.
Because the SMU automatically updates reading buffer statistics when data is added to the reading buffer, this
function is generally not needed. When the reading buffer is configured to wrap around and overwrite older data
with new data, the buffer statistics will include the data that was overwritten. Use this function to recalculate the
statistics that include only the data that is presently stored in the buffer.
Also see
bufferVar.fillmode (on page 7-22)
smuX.buffer.getstats() (on page 7-182)