Why Does My Ball Pump Display 0.5 PSI Instead of 0 PSI After Powering On?

 

Applies to Models:
✅ P200
✅ P300
✅ P300 Plus

 

📊 Is This Normal?

Yes — seeing a 0.5 PSI reading upon startup is completely normal and does not affect the accuracy or performance of your ball pump.

🧠 Why It Happens

Several environmental and system-related factors can cause the display to show a small pressure value like 0.5 PSI when first powered on:

1. Environmental Factors

• Temperature

• Altitude

• Air density
  These can all slightly affect pressure readings at startup.

2. Automatic Calibration Behavior

• When powered on, the device compares the current ambient pressure with its internal calibration.

• If the difference exceeds 0.4 PSI, the system automatically adjusts the baseline to the current environment.

• This ensures better accuracy during actual use.

📘 Note on Low-Pressure Measurement

As stated in the user manual:

The device is not designed to measure pressures below 3 PSI with high precision due to sensor limitations and environmental variability.

This means:

• Readings below 3 PSI may have slight variances

• It’s normal and expected behavior for professional-grade digital sensors

✅ Summary