INFICON Explorer Portable Gas Chromatograph - Manual (Page 271)

Explorer Operator Manual
269
Problem: Sensitivity is too low
Cause: Calibration gas pressure is low.
Action: Check the calibration gas pressure and replace the tank if necessary.
Cause: Incorrect calibration gas.
Action: Ensure the calibration gas contains all of the compounds listed in the library.
Each library compound must be identified as a calibration compound.
Cause: Calibration gas is not pressurized properly.
Action: Ensure the delivery pressure is maintained at no more than 14 psig.
Cause: Calibration gas has deteriorated.
Action: Replace the calibration gas tank.
NOTE: Some calibration mixes are not stable for extended periods. Check with your
specialty gas supplier for details.
Cause: UV lamp is failing.
Action: Replace the UV lamp, as detailed in Replacing the UV Lamp or Installing
a New One on page 245.
Cause: The ECD is contaminated.
Action: Set the detector temperature to 80 C and increase the pressure to 14 psi.
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.