Keithley 3700A Series, Справочное руководство

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Series 3700A System Switch/Multimeter Reference Manual Section 11: TSP command reference
3700AS-901-01 Rev. D/June 2018 11-27
bufferVar.fractionalseconds
This attribute contains the fractional second portion of the timestamp of each reading in the reading buffer.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (R) Yes Buffer storage settings
Clearing the buffer
Instrument reset
Recall setup USB flash drive using
dmm.savebuffer or
dmm.appendbuffer Not applicable
Usage
fractionalseconds = bufferVar .fractionalseconds[ N ]
fractionalseconds
The fractional portion of the timestamp (in seconds) when each reading occurred
bufferVar
The reading buffer
N
The reading number
N
; can be any value from 1 to the number of readings in the
buffer; use the
bufferVar. n
command to determine the number of readings in
the buffer
Details
The
bufferVar .fractionalseconds
information from a reading buffer is only available if the
bufferVar .collecttimestamps
attribute is set to 1 (default setting). If it is set to 0, you will not
be able to access any time information from a reading buffer. You may change the collect timestamps
setting when the buffer is empty (
bufferVar .clear()
).
This read-only attribute is an array (a Lua table) of the fractional portion of the timestamps, in
seconds, of when each reading occurred. These are absolute fractional times.
Example
reset()
testData = dmm.makebuffer(1000)
testData.collecttimestamps = 1
dmm.nplc = 0.5
dmm.range = 0
dmm.configure.set("Dcv_100mV")
dmm.setconfig("slot2", "Dcv_100mV")
scan.create("2035:2040")
scan.execute(testData)
print(testData.fractionalseconds[1])
printbuffer(1, 6, testData.fractionalseconds)
This example creates a reading buffer
named
testData
, configures the buffer to
collect time and date data, sets and saves
the DMM configuration, creates a scan list,
and then runs the scan.
The
print()
command outputs the
fractional portion of the timestamp for the
first measurement in the buffer.
Output:
5.097621610e-01
The
printbuffer()
command then
outputs the fractional portion of the
timestamp for the first six measurements in
the buffer.
Output:
5.097621610e-01, 5.287080010e-01,
5.476591960e-01, 5.666124460e-01,
5.855656060e-01, 6.813259660e-01
Also see
bufferVar.clear() (on page 11-21)
bufferVar.collecttimestamps (on page 11-24)
Reading buffers (on page 6-7, on page 6-1)