Front Panel Controls; Internal Self-Tests; Keyboard Test - Fluke PM6690 Operator's Manual

Front Panel
Controls

Internal Self-Tests

The test programs forming the self-diagnosis
can be activated from the front panel as fol-
lows:
–
Press USER OPT
–
Press Test.
–
Press Test Mode.
–
Select one of the six tests available by
pressing the softkey below the label with
the name of the test function. Five of the
tests (RAM, ROM, Logic, Display, and In-
terface) are individual. They are briefly
described below. The sixth, named All,
performs all five individual tests in se-
quence.
•
All
- all tests performed in sequence
•
RAM
- test of RAM memory
•
ROM
- test of ROM memory
•
Logic
- test of counter ASIC and other
logic circuits.
•
Display
- test of graphic display
module
•
Interface
- test of GPIB and USB
–
Press Start Test.
–
If a fault is detected, an error message ap-
pears on the display and the program halts.
Note any error messages.
–
If no faults are detected, the instrument re-
turns to the normal measurement mode.

Keyboard Test

This test verifies that the timer/counter re-
sponds when you press any key. It is not a
functional test. Such tests are performed later
in this chapter. The important thing here is
that something changes on the display when
you press a key. Consequently you can press
the keys in almost any order without paying
attention to the exact response, but for those
who want to be more systematic there is a ta-
ble overleaf, where all keys are exercised at
least once.
Press the keys as described in the first column
and look at the display for the text in the sec-
ond column. Some keys change more text on
the display than described here. The display
text mentioned here is the one mostly associ-
ated with the selected key.
NOTE: For the instrument to respond correctly,
this test must be carried out in se-
quence, and you must start with the
DEFAULT setting. See page 2-13. No
signals should be applied to the input
connectors

Front Panel Controls 7-3

Performance Check