Chapter 9 97
Glossary
Light Pipe Quartz rod that transmits chemiluminescence from
combustor to the photomultiplier tube.
Mode Integrator conditions specified for each signal output
channel in WinPulse.
Optical Filter Filter used to isolate specific chemiluminescence
bands that are able to reach the photomultiplier tube.
Output Zero The zero value set for the output signal. Usually this is
some value below the lowest noise signal when the
PFPD is set to the tick-tock mode.
Permeation Device Device containing a permeation source that releases a
constant flow of one or more compounds containing
the analyte of interest at a given temperature. This is
used to optimize the operating parameters of the PFPD
for the selected analyte.
PFPD Pulsed Flame Photometric Detector that operates in a
periodic fashion generating emission waveforms.
Photomultiplier Tube Converts the chemiluminescence energy resulting
(PMT) from the combustion of the GC effluent into an
electrical current.
PMT Housing Contains the optical filter(s), the PMT, and the PMT
socket.
PMT HV Cable Delivers the voltage required by the PMT to convert
light energy into an electrical current.
PMT Signal Cable Delivers the output current generated by the PMT to
the printed circuit board contained in the detector
controller.
PMT Socket The keyed receptacle for the pins protruding from the
back of the PMT.
PMT Voltage Voltage applied to the photocathode of the PMT to
convert photon energy to an electrical current.
Pneumatics The gas lines and gas flow controllers that direct and
regulate the flow of hydrogen and air from the gas
supply to the detector base.
Range Corresponds to the desired operating range of the
electrometer (1, 10, or 100, which correspond to 0.1,
1.0, and 10.0 µA/V, respectively).
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