Detectors 5
Advanced Operation Manual 205
shown next to Makeup in the parameter list. Change
the gas type, if necessary.
b If your capillary column is defined, choose a flow
mode and set the makeup gas flow or combined flow.
c If your capillary column is not defined, enter a makeup
gas flow. Only constant flow is available.
7 Scroll to PMT voltage and make sure it is turned on.
8 Optionally, set the emission block temperature. (Normally,
the default temperature of 150 °C is sufficient for most
applications.) Scroll to Emission Block, input the desired
temperature, and press [Enter]. See “FPD+ temperature
considerations” on page 202 for more information.
9 Scroll to Flame and press [On/Yes]. This starts the
automatic ignition sequence (see “Lighting the FPD+
flame” on page 203).
On successful ignition, the signal increases. Typical signal
output increases are 4 to 40 pA in sulfur mode, and 10 to
70 pA in phosphorus mode. You can also verify that the
flame is lit by holding a cold, shiny surface, such as a
mirror or chrome- plated wrench, over the vent exit.
Steady condensation indicates that the flame is lit.
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