---
title: Learning Path: Keep Gas Analysers Running | Sarvesh
url: https://www.sarveshanalytics.com/learn/path-keep-analysers-running.html
description: A nine-lesson path for maintenance and operations teams: calibration, calibration gas, frequency, auto-calibration, troubleshooting, spares and sensor life.
updated: 2026-11-03
source: html
---

Learn · Learning path

# Keep analysers running

Calibrate with confidence, diagnose quickly and plan maintenance before readings drift.

 9 lessons About 28 min For: Instrument technicians, maintenance planners and plant operators

## What you will be able to do

- Calibrate correctly and know what the adjustment did
- Choose and handle calibration gas without introducing error
- Set a calibration interval you can defend
- Diagnose a reading that is high, low, noisy, slow or stuck
- Plan spares and sensor replacement

## Follow these lessons in order

1. [  **Accuracy, precision, repeatability and drift in gas analysers** Accuracy is how close a reading is to the true value; precision or repeatability is how closely repeated readings agree; drift is how the reading moves over time. Know what drift is before fighting it.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/accuracy-precision-repeatability-and-drift.html)
2. [  **How gas analyser calibration works: zero and span** Calibration compares the analyser's reading with a gas of known concentration and adjusts it to match. Zero and span, properly.  Beginner*4 min*](https://www.sarveshanalytics.com/learn/how-gas-analyser-calibration-works.html)
3. [  **Calibration gases: choosing, handling and certificates** Choose span gas near 70 to 90 % of the range in a balance gas that matches the sample, with a certificate stating concentration, uncertainty and expiry. Bad gas makes a bad calibration.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/calibration-gases-choosing-and-handling.html)
4. [  **How often should you calibrate a gas analyser?** Set the interval from three things: how much error the process can tolerate, how fast the analyser drifts, and what a wrong reading costs. A risk-based interval.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/how-often-to-calibrate-a-gas-analyser.html)
5. [  **Auto-Calibration and validation checks for gas analysers** Auto-calibration switches zero and span gas to the analyser by solenoid valves on a timer, keypad or Modbus command, and adjusts or records the result. What to automate and what not to.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/auto-calibration-and-validation-checks.html)
6. [  **Troubleshooting gas analyser readings: high, low, noisy, slow** Apply known gas at the analyser inlet. Symptoms to causes.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/troubleshooting-gas-analyser-readings.html)
7. [  **Sample system troubleshooting: symptoms to causes** Most analyser faults are sample system faults. Most faults are in the sample.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/sample-system-troubleshooting.html)
8. [  **Sensor life, poisoning and replacement in gas analysers** Electrochemical cells are consumed by the gas they measure and last months to years depending on exposure. Know the end of life.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/sensor-life-poisoning-and-replacement.html)
9. [  **Maintenance schedule and spares for gas analysers** Maintain analysers by routine: a daily look at flow, pressure and condensate; a weekly check of filters and drain; a monthly calibration check; and an annual full calibration, sensor check and leak test. Put it on a schedule.  Intermediate*3 min*](https://www.sarveshanalytics.com/learn/maintenance-schedule-and-spares-for-gas-analysers.html)

Stuck on a real problem while you learn? [Ask an engineer](https://www.sarveshanalytics.com/contact.html#enquiry). Every lesson is checked against the figures in our catalogues.