Test Key - Fluke 8508A User Manual

Test Key

Press the key to display the
Test
variety of selftests.
The menu allows you to initiate front panel display and key tests and 'Circuit' test.
TEST
The latter has either a standard single sequence of test or the capability to loop this
sequence of tests.
Please note that the instrument should be allowed a warm up period of 10 minutes before
performing an internal self test and that ambient temperature should be between 15
o
and 35 C.
Press any key other than
Disp
'walking strobes', which allow you to inspect segments and complete
blocks.
Press
Press
Keys
position appears to the left of a colon; to the right of the colon an
followed by the key's switch number, and the name of the key is given on
the right of the display.
Press
Press to start a selftest and disable all other function keys, signal inputs and
Start
normal trigger sources.
While selftest is running the display shows a reference number of the test
currently being performed.
A fail indicator (?) may be added to the display, and this will persist to the
end of the test sequence. Press the
ABORT
key reads out the failures in turn. The memory of each failure is lost as it is
read.
Appendix A contains a list of the failure-message numbers.
menu, from which you can choose to perform a
TEST
TEST Menu
Test
during the checks to terminate the display test.
Test Disp
to test all keys other than
Keys
during the checks to terminate the key test.
Test Key
and
TEST UNSUCCESSFUL
The success of Selftest can be inhibited by:
Temperature not in the range: 5 °C to 40 °C, and
presence of excessive RFI or Line noise.
Using the Selftest Functions
to step both displays through a sequence of
. The key's hexadecimal matrix
Test
key to stop the test. In the
Abort
menus, repeatedly pressing the
Note
Making Measurements
adj126f.eps
o
C
is
S
TEST
List
3
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