INFICON Explorer Portable Gas Chromatograph - Manual (Page 276)

Maintenance and Troubleshooting
274
Cause: Blockage at the detector vent ports.
Action: Ensure the ports are not covered or blocked in any way.
The detector out ports vent the effluent from the PID (port 1) and ECD
(port 2). The pressure set by the method will determine the outlet flow
rates at these ports. If the detector is not in use
Explorer supplies a
maintenance flow to ensure the detector is ready for operation.
Samples drawn by the pump to fill and flush the sampling system are vented
through the pump out port. The flow though this port is approximately
250 ml/min when the pump is on.
The two columns that are not in use are flushed constantly with
approximately 1 mL/min. The two columns are both vented through the vent
out port.
Cause: The ECD is contaminated.
Action: Set the detector temperature to 80 C and increase the pressure to 14 psig.
Allow the detector to purge under these conditions for at least 8 hours as detailed
in Purging the ECD on page
254, or contact INFICON
WARNING
Do not open the instrument or attempt to remove the ECD. If the
ECD must be removed from the instrument, contact
INFICON.
Cause: Pieces of cored septum have fallen down inside the injection port.
Action: Remove the injection port and clean it as outlined in Cleaning the
Injection Port Assembly on page 249.