Test Routines - Fluke PM6685 Service Manual

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