TA I
NSTRUMENTS
TGA 2950 5–19
TGA 2950
Test Functions
The TGA 2950 has three levels of test and
diagnostic functions:
• The confidence test that is run every time
the instrument is started.
• Cycling test functions that continuously test
specific.
• A manufacturing verifier test mode that
coordinates and logs the results of a
sequence of confidence test and drift runs.
These test functions are always present in the
instrument. They are designed to aid manufac-
turing and service in checking and repairing the
instrument.
The Confidence Test
The TGA confidence test is run each time the
instrument is turned on or reset. The confidence
test checks most of the computer and interface
components in the system.
When the confidence test is running, the number
of the test currently being performed is shown
on the display. The test number appears as a
two-digit hex number on the lower right of the
display. This number is changed as each new
test is started. Most of the tests are very brief, so
their test numbers may not be apparent.
A standard TGA system takes about 12 seconds
to run the confidence test. The longest tests are
the RAM tests, which take about 6 seconds.
TGA 2950 Test Functions
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