Keithley 3721-ST User Manual

Series 3700A System Switch/Multimeter Reference Manual Section 11: TSP command reference
3700AS-901-01 Rev. D/June 2018 11-253
io.close()
This function closes a file.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes (see Details)
Usage
io.close()
io.close(file)
file
The descriptor of the file to close
Details
If a file is not specified, the default output file closes.
Only io.close(), used without specifying a parameter, can be accessed from a remote node.
Example
testFile, testError = io.open("testfile.txt", "w")
if nil == testError then
testFile:write("This is my test file")
io.close(testFile)
end
Opens file testfile.txt
for writing. If no errors were
found while opening, writes
"This is my test
file" and closes the file.
Also see
fileVar:close (on page 11-242)
Script examples (on page 9-5)
io.open() (on page 11-255)
io.flush()
This function saves buffered data to a file.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
Yes
Usage
io.flush()
Details
You must use the io.flush() or io.close() functions to write data to the file system.
Data is not automatically written to a file when you use the io.write() function. The io.write()
function buffers data; it may not be written to the USB flash drive immediately. Use the io.flush()
function to immediately write buffered data to the drive.
This function only flushes the default output file.

Keithley 3721-ST Specifications

General

Type	Multimeter
Model	3721-ST
Manufacturer	Keithley
Measurement Functions	DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature
Relay Type	Electromechanical
Temperature Range	-200°C to 1820°C
Accuracy	Varies by function and range
Resolution	Varies by function and range
Display	LCD
Interface	GPIB, RS-232
Topology	Multiplexer
Maximum Switching Voltage	300 V
Maximum Switching Current	1 A
Input Impedance	>10 GΩ (DC Voltage ranges)