Keithley 2001 User Manual

IEEE-488 Reference
4-48
4.0.16 *TST?  self-test query
Purpose To run the self-tests and acquire the results.
Format *TST?
Description The *TST? query command is used to perform a checksum test on ROM and places the coded
result (0 or 1) in the Output Queue. When the Model 2001 is addressed to talk, the coded result
is sent from the Output Queue to the computer.
A returned value of zero (0) indicates that the test passed, and a value of one (1) indicates that
the test has failed.
Programming Example 10 OUTPUT 716; “*TST?” ! Run and request test result
20 ENTER 716; A$ ! Address 2001 to talk
30 PRINT A$ ! Display coded result
4.0.17 *WAI  wait-to-continue
Purpose To prevent the execution of further commands until all previous commands are completed.
Format *WAI
Description There are two types of device commands; Sequential commands and Overlapped commands. A
Sequential command is a command whose operations are allowed to finish before the next com-
mand is executed. An Overlapped command is a command that allows the execution of subse-
quent commands while device operations of the Overlapped command are still in progress. The
*WAI command is used to hold off the execution of subsequent commands until the device op-
erations of all previous Overlapped commands are finished. The *WAI command is not needed
for Sequential commands.
There are two Overlapped commands in the Model 2001; :INITiate and *TRG.
The :INITiate command takes the Model 2001 out of the idle state. The device operations of
:INITiate are not considered complete until the Model 2001 goes back into the idle state. By
sending the *WAI command after the :INITiate command, all subsequent commands will not
execute until the Model 2001 goes back into idle.
The *TRG command issues a bus trigger which could be used to provide the arm, scan and mea-
sure events for the Trigger Model. By sending the *WAI command after the *TRG command,
subsequent commands will not be executed until the pointer for the Trigger Model has finished
moving in response to *TRG and has settled at its next state.

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English