Keithley 3721-ST User Manual

Series 3700A System Switch/Multimeter Reference Manual Section 11: TSP command reference
3700AS-901-01 Rev. D/June 2018 11-17
Details
Assigning a value to this attribute enables or disables the buffer append mode. This value can only be
changed with an empty buffer. Use bufferVar.clear() to empty the buffer.
When a buffer is created over a remote interface, the append mode attribute default setting is off (0).
However, when using the front panel or web interface, the default setting is on (1) to allow triggered
readings to fill a buffer without clearing the previous readings.
If the append mode is set to 0, any stored readings in the buffer are cleared before new ones are
stored. If append mode is set to 1, any stored readings remain in the buffer and new readings are
added to the buffer after the stored readings.
With append mode on, the first new measurement is stored at rb[n+1], where n is the number of
readings stored in buffer rb.
Example
buffer1.appendmode = 1
Append new readings to contents of the
reading buffer named buffer1.
Also see
bufferVar.clear() (on page 11-21)
Reading buffers (on page 6-7, on page 6-1)
bufferVar.basetimefractional
When enabled by the bufferVar.collecttimestamps attribute, this attribute contains the fractional portion of the
timestamp (in seconds) for the first reading stored 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
value = bufferVar.basetimefractional
value
The fractional seconds of the timestamp
bufferVar
The reading buffer
Details
The bufferVar.basetimefractional 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()).
A read-only attribute for each existing reading buffer in the instrument.
The attribute represents the fractional seconds of the timestamp when reading 1 was stored in the
buffer

Keithley 3721-ST Specifications

General

Brand	Keithley
Model	3721-ST
Category	Multimeter
Language	English