Keithley 3720-ST User Manual

Section 11: TSP command reference Series 3700A System Switch/Multimeter Reference Manual
11-146 3700AS-901-01 Rev. D/June 2018
The aperture setting is not available for the functions "continuity" and "nofunction". If you
query the aperture when either of these functions is selected, nil is returned. If you write the
command when either of these functions is selected, an error is generated.
The aperture value is saved with the dmm.func function setting, so if you use another function, then
return to the previous setting, such as "dcvolts" or "frequency", the aperture value you set
previously is retained.
The setting for aperture may be automatically adjusted based on what the DMM supports. Therefore,
after setting the aperture, query the value to see if it was adjusted.
If the detector bandwidth (dmm.detectorbandwidth) setting is 30 or less for "acvolts" or
"accurrent", an error message is generated if you try to set the aperture for these functions.
Example
dmm.func = "dcvolts"
dmm.aperture = 16.67e-3
Set the aperture to 16.67 milliseconds for
DC volts.
Also see
dmm.dbreference (on page 11-170)
dmm.func (on page 11-179)
dmm.nplc (on page 11-209)
dmm.appendbuffer()
This function appends data from the reading buffer to a file on the USB flash drive. If no file exists, this function
creates a file.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes
Usage
dmm.appendbuffer("bufferVar", "fileName")
dmm.appendbuffer("bufferVar", "fileName", timeFormat)
bufferVar
A string with the name of a DMM reading buffer from which you want to append
data to the specified file
fileName
A string with the file name of the file on the USB flash drive to which reading
buffer data will be appended
timeFormat
How the date and time information should be saved. The values for
timeFormat are:
▪ dmm.buffer.SAVE_RELATIVE_TIME: Saves relative timestamps only
▪ dmm.buffer.SAVE_FORMAT_TIME: Saves dates, times and fractional
seconds. This is the default if no time format is specified
▪ dmm.buffer.SAVE_RAW_TIME: Saves seconds and fractional seconds
only
▪ dmm.buffer.SAVE_TIMESTAMP_TIME: Saves only timestamps

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English