Copyright PSC
2000781K MkII MLB Operating Procedure
Page 30 of 68
Step
Procedure
Date & Initials
Tech.
QA
8.3.2
Perform the following to operate the test circuit.
1. Designate a person to watch the power source output display.
2. Turn on the power source output.
3. Verify the oscilloscope trigger is active and ready to acquire data.
4. Activate the timer relay.
5. Verify the following occurred:
5.1. All four measurement channels (voltage and current) remained at
zero. The oscilloscope should not trigger.
5.2.
The power source’s current indicator remained at zero. This ensures
even a small voltage or current, below the oscilloscope’s trigger level,
did not pass through.
6. If positions or scales were altered to examine data, ensure they are
returned to their original values.
7. Turn off the power source output.
If any parameters are not met, make the required changes and repeat this step.
Any change to the
Stow Power and Measurement Circuit
shall also require re-
running
Stow Test Circuit #1
per section 8.1 and
Stow Test Circuit #2
per
section 8.2.
8.3.3
Remove the
Test Circuit: Stowed
portion of
Stow Test Circuit #3
in Figure 8-3.
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