Fluke PM6685, Руководство по обслуживанию

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Test Routines
Test Routines via AUX MENU Key
The test routines are the routines accessible via the AUX MENU key.
Refer to the PM6685 Operators Manual.
Power-On Tests
At power-on some tests are automatically performed. If any of these
tests fails, an error message is displayed and the instrument is halted.
Pressing the LOCAL/PRESET key makes the device continue inde-
pendently of the detected error, but without performing the next tests
in the start-up sequence.The following tests/actions are performed:
–
Write 001 to internal test pins
–
Pulse all microcomputer i/o ports twice
–
Write 0.1 on display
–
Write 0.1.2. on display and 010 on test pins
– Test mC internal RAM ( error = Err mC & halt)
–
Write 0.1.2.3 to display and 011 on test pins
–
Test mC timer ( error = Err mC & halt)
–
Write 0.1.2.3.4. on display and 100 on test pins
–
Test main board RAM ( error = Err ra. & halt )
– Write 0.1.2.3.4.5. to display and 101 to test pins
–
Test ASIC ( error = Err. 5xx & halt)
–
Write 110 on test pins
–
Check display (light all segments for 2 s)
–
Clear Display
– Perform GPIB RAM test if GPIB is installed
(error = Err ra. & halt)
–
Write 111 on test pins ( final value)
– Clear display and start normal measurement procedure
4-16 Software Functional Description