188 Advanced Operation Manual
5 Detectors
About the NPD
New NPD features and changes
The NPD firmware in this GC (A.01.08 or higher) is
considerably different from that in earlier versions and from
the 6890 firmware. Major changes are:
• Equilibration time parameter has been removed.
• Adjust Offset feature has been changed.
• Auto Adjust on/off has been added.
• Dry Mode has been added.
• Blos/ceramic bead selector has been added.
We strongly recommend that you allow the firmware to
perform Auto Adjust and set the Bead Voltage.
NPD software requirements
This discussion assumes that the following
firmware/software is installed:
Software/firmware with numbers less than shown in the
table can cause reduced bead lifetime. See the Agilent web
site (www.agilent.com) for firmware and software updates.
NPD flows and general information
The NPD passes sample and carrier through a hydrogen/air
plasma. A heated ceramic or glass source, called the bead, is just
above the jet. The low hydrogen/air ratio cannot sustain a flame,
Tabl e 48 Software requirements
Product Software/firmware revision
7890B or 7890A+ GC All
7890A GC A.01.08 or higher
Agilent OpenLAB CDS All
Agilent MassHunter WorkStation All
Agilent GC ChemStation B.04.01 or higher
Agilent MSD ChemStation G1701EA or higher
Agilent EZ Chrom Elite 3.3.2 or higher
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