User guide

42 Advanced User Guide
2 Configuration
Front Detector/Back Detector/Aux Detector/Aux Detector 2
See Ignore Ready = and “Unconfigured:” on page 26.
To configure the makeup/reference gas
The makeup gas line of your detector parameter list changes
depending on your instrument configuration.
If you have an inlet with the column not defined, the makeup
flow is constant. If you are operating with column defined, you
have a choice of two makeup gas modes. See “About Makeup
Gas” on page 298 for details.
1 Press [Config][device], where [device] is one of the following:
• [Front Det]
• [Back Det]
• [Aux detector 1]
• [Aux detector 2]
2 Scroll to Makeup gas type (or Makeup/reference gas type) and
press [Mode/Type].
3 Scroll to the correct gas and press [Enter].
Lit offset
The GC monitors the difference between the detector output
with the flame lit and the output when the flame is not lit. If
this difference falls below the setpoint, the GC assumes that the
flame has gone out and tries to reignite it. See “FID automatic
reignition (Lit offset)” on page 301 for details.
To configure the FPD heaters
The flame photometric detector (FPD) uses two heaters, one in
the base and one near the combustion chamber. When
configuring the FPD heaters, select Install Detector 2 htr rather
than the default Install Detector (FPD).