To check the automatic stop controller, what is recorded?

• A. Time the pump runs after starting
• B. Time to reach full speed
• C. Total running time
• D. Discharge pressure at start

Answer: (A)

The automatic stop controller works on a timer that ends the pump run after a preset interval. To verify it, you record the actual time the pump runs from the moment it starts until the controller stops it. If this elapsed time matches the intended stop interval (within tolerance), the stop function is working correctly.

The other options don’t test the stop mechanism: how fast the pump reaches full speed checks acceleration, not stopping; the total running time could be influenced by other factors and isn’t a direct measure of the stop timer; discharge pressure at start doesn’t reveal whether the stop control will trip as programmed.