CAUTION

Escaping Gas

Gas can escape from open gas connections when the detector gas flow and/or the gas supply is turned on. The escaping gas can pose a health and safety risk.

  • Make sure that the detector gas flow and the gas supply are turned off before you remove the nebulizer, disconnect the gas tubes or remove the gas filter assembly from the detector.
  • Turn on the gas supply and detector gas flow only when the nebulizer is installed, the components in the gas flow path are properly connected, and the protective cover of the gas filter assembly is installed.

Parts and tools required

Only required if gas tubing is to be replaced

  • For replacement of the gas inlet tubing:

    • Gas inlet elbow connector

    • Gas inlet tubing

  • For replacement of the gas exhaust tubing:

    • Gas exhaust elbow connector

    • Gas exhaust tubing

  • Tubing cutter (optional)

Preparations

  1. Flush the detector with the detector gas flow being turned on. For recommendations on flushing the detector, see Flushing the Detector Between Analyses.

  1. Turn off the pump flow and then the gas flow:

  1. Turn off the pump flow to the detector. Wait at least 5 minutes. During the waiting period, the detector drains any remaining mobile phase to waste.
  2. Turn off the gas flow on the detector.
  3. Wait until the system pressure is down to zero before you continue.
  4. Turn off the gas supply to the detector.

  1. Turn off the detector with the main power switch.

Follow these steps

On the gas port on the detector, disconnect the elbow connectors of the gas tubes from the port.

To re-install the gas tubes or install new gas tubes, follow the steps in Connecting the Gas Inlet and Exhaust Tubes.