Gas Analysis Issues: Why Calibration Fails and How to Fix It
Gas Analysis is essential for process accuracy, emission control, and plant safety.
But when calibration keeps failing, the analyzer is trying to tell you something.
Here’s what’s usually behind it — and how to fix it:
Sensor Drift or Contamination
-- Cause: Sensor surface coated with dust or residue.
-- Fix: Clean or replace the sensor and verify zero/span points.
Blocked or Leaking Sample Line
-- Cause: Gas flow restricted or leaking before analyzer.
-- Fix: Inspect and clean sampling lines and replace filters.
Wrong or Expired Calibration Gas
-- Cause: Cylinder concentration doesn’t match configuration.
-- Fix: Always verify calibration gas label and expiry date.
Temperature Instability
-- Cause: Internal heater not maintaining consistent temperature.
-- Fix: Check analyzer heaters and room ventilation.
Moisture or Condensation
-- Cause: Humidity in the sampling system affects readings.
- - Fix: Install moisture traps or heated sample lines.
Regular inspection and proper calibration practice keep your analyzer steady, accurate, and compliant — even under harsh plant conditions.
Stay in control of your measurements — make calibration part of your routine, not your downtime.