Step‑by‑Step Cross‑Port Check
Prep Gauge Settings
- Set Time Averaging to around 4–5 seconds, and switch both Channel A and B to display Pressure (Pa).
Input Ports Test (Blue & Green)
Connect a tube between the Input A (blue) and Input B (green) ports.
After readings stabilize, both channels should match within ±2%.
Reference Ports Test (Red & Yellow)
Disconnect blue/green tube and connect Ref A (red) to Ref B (yellow) ports.
Again, ensure readings are within ±2%.
Optional Dual‑Gauge Comparison
For extra assurance, connect each matching port between two gauges (e.g., blue-to-blue).
Readings should agree within ±2%, confirming accuracy.
Why This Method is Effective
- Detects tubing issues—like pinches, water, or leaks—which often cause larger errors than sensor drift (up to 90%).
- Confidently confirms gauge accuracy with minimal effort—no lab required.
- Guideline: only send for recalibration if discrepancies exceed ±2%, after checking tubings and resetting baseline.
Troubleshooting Tips
If readings don’t match:
Replace or straighten tubing; test ports individually to isolate the issue.
Raise Time Averaging to 4 s if readings are noisy.
Clear baseline before retesting.
Persisting discrepancies? Try another gauge for a final check before recalibration.
