Specifications

*TST?
Self-Test. Causes an instrument to execute extensive internal self-tests and returns a
response showing the results of the self-test.
NOTES 1. During the first 5 minutes after power is applied, *TST? may fail. Allow the
module to warm-up before executing *TST?.
2. Module must be screwed securely to mainframe.
3. The VT1419A C-SCPI driver for MS-DOS
®
implements two versions of *TST.
The default version is an abbreviated self test that executes only the Digital
Tests. By loading an additional object file, the full self test can be executed as
described below. See the documentation that comes with the VT1419A C-SCPI
driver for MS-DOS
®
.
Comments
·
Returned Value:
Value Meaning Further Action
0 *TST? OK None
-1 *TST? Error Query the Error Queue (SYST:ERR?)
for error 3052. See explanation below.
·
IF error 3052 ‘Self test failed. Test info in FIFO’ is returned. A FIFO value of 1
through 99 or >=300 is a failed test number. A value of 100 through 163 is a
channel number for the failed test. A value of 200 through 204 is an A/D range
number for the failed test where 200 = 0.0625 V, 201 = 0.25 V, 202=1V,
203=4Vand204=16Vranges. For example DATA:FIFO? returns the values
72 and 108. This indicates that test number 72 failed on channel 8.
Test numbers 20, 30-37, 72, 74-76, and 80-93 may indicate a problem with a
Signal Conditioning Plug-On.
For tests 20 and 30-37, remove all SCPs and see if *TST? passes. If so, replace
SCPs one at a time until the one causing the problem is found.
For tests 72, 74-76, and 80-93, try to re-seat the SCP that the channel number(s)
points to or move the SCP and see if the failure(s) follow the SCP. If the problems
move with the SCP, replace the SCP.
These are the only tests where the user should troubleshoot a problem. Other tests
which fail should be referred to qualified repair personnel.
VT1419A Command Reference
Common Command Reference
Chapter 6 317
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