It is a myth that SF6 analysers don’t need servicing, just calibration. The reality is that analysers are complex instruments with parts that require servicing and replacing:
- Dry insulating gases dry out O-rings and seals which eventually crack and allow ambient air into the analyser effecting readings
- Hoses and fittings need pressure testing (burst risk) and leak checking regularly as these are high impact items and are the main source of inaccurate readings due to leakage
- Internal fittings, regulators, pressure sensors all need checking and verifying they are leak free and working correctly
- Compressors for pump back require service and maintenance to ensure they are leak free and can work effectively
- Electrical safety checks in many countries are legally required to prevent injury from damaged power cables
- Legislation changes as does software, analysers may need updates to maintain best practice or resolve bugs
- Some calibrations are not performed to traceable standards as they are completed by local agents or subcontractors who do not specialize in calibration
The EMT Way:
All analysers when returned to our service centres in Orlando (USA) or Bedford (UK) undergo a 95 point assessment
All essential O-rings and seals are replaced. Internal pressure sensors are calibrated (essential for dewpoint calculation) and internal piping checked
Client hoses and fittings are both pressure checked (burst risk) and leak checked
Compressors are serviced and gaskets assessed and changed if required
All external and internal power systems are checked and secured
All analysers are updated to the latest software and legislation changes on every service
Always ensure your calibration is covered by ISO9001 standards as a minimum – Ask for the cert!
