INFICON Explorer Portable Gas Chromatograph - Manual (Page 89)

Using Explorer
NOTE: You must use nitrogen carrier gas when you are using the ECD. If the internal
cylinder was used for air, fill it with nitrogen and purge it. Do this twice to ensure
there is no air in the cylinder. Use Ultra High Purity grade nitrogen. Use the
refill adapter (MX380303
or MX380323) to fill the internal cylinder.
Setting up the ECD
1. Use flexible tubing fitted with luer adapters to vent the effluent from the ECD
(port 2).
Vent the detector well away from the instrument and all users. If you are using
the GC indoors, you may want to vent the detector outside.
NOTE: Venting the ECD outlet does not affect the performance as long as the tubing does
not provide any restriction. Ensure the tubing is not kinked or stressed.
2. Change the view from the PID to the ECD by pressing Enter Menu, then
DISPLAY, GC, and DET.
3. When prompted to change views to the ECD, press Enter Menu.
4. When you first select the ECD for operation, monitor the offset level as
displayed on the status screen and wait until it has stabilized before attempting
to use the instrument.
An instrument that is cleaning out will show an unstable and dropping baseline.
Typical offset is in the range 200-800 mV and anything over 800 mV indicates
contamination.
5. Once the baseline is stable, calibrate the instrument as outlined in Calibration
starting on page 210.
87