Fluke 123 - Page 45

Performance Verification
3.5 Input A and Input B Tests 3
3-15
18. Select the following test tool setup:
• Fluke 123/124: press
/ to open the SCOPE INPUTS menu.
• Fluke 123/124: press
to open the TRIGGER menu, and choose:
INPUT:  A | SCREEN UPDATE:  FREE RUN | AUTO RANGE:  >15Hz
• Fluke 125: press to open MENU.
• Fluke 125: press
to open the TRIGGER menu, and choose :
INPUT:  A | UPDATE:  FREE RUN | AUTO RANGE:  >15Hz
• Press to enable the arrow keys for Trigger Level and Slope adjustment.
• Using
select positive slope triggering (trigger icon ).
• Using
set the trigger level to +2 divisions from the screen center. For
positive slope triggering, the trigger level is the top of the trigger icon (
).
19. Set the 5500A to source 0.4V DC and to OPR.
20. Verify that no trace is shown on the test tool display, and that the status line at the
display bottom shows
Wait:B . If the display shows the traces and status Hold:B , then
press
to re-arm the test tool for a trigger.
21. Increase the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD
function, until the test tool is triggered, and the traces are shown.
22. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is
triggered.
To repeat the test, start at step 19.
23. Set the 5500A to Standby.
24. Press
to clear the display.
25. Press
to enable the arrow keys for Trigger Level and Slope adjustment.
26. Using
select negative slope triggering ( ).
27. Using
set the trigger level to +2 divisions from the screen center. For negative
slope triggering, the trigger level is the bottom of the trigger icon (
).
28. Set the 5500A to source +3V DC and to OPR.
29. Verify that no trace is shown on the test tool display, and that the status line at the
display bottom shows
Wait:B . If the display shows the traces and status Hold:B , then
press
to re-arm the test tool for a trigger.
30. Decrease the 5500A voltage in 0.1V steps, using the 5500A EDIT FIELD function, until
the test tool is triggered, and the traces are shown.
31. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is
triggered. To repeat the test, start at step 28.
32. When you are finished, set the 5500A to Standby.