4
Operation
62
User Guide
Operating the LTM System
The LTM system integrates fully into the 8890 GC. Use the GC touchscreen, browser interface,
or data system to program the LTM column modules.
LTM Series II column module configuration
The Agilent LTM Series II column modules provide the primary column configuration
information (column length, id, film thickness, maximum temperature, and absolute maximum
temperature) to the 8890 GC. The GC automatically reads this information and partially
configures the column. The column number used depends entirely on electronics board
configuration and the connectors used on the board. See
Assembly in the LTM Oven Door”
To complete column configuration, enter the In Segment, Out Segment, and similar
information.
Configuring LTM columns
Configure each LTM column module in the GC as a composite column.
The GC defines all parts of the LTM column module columns as one “composite” column. In
, the In segment, analytical column, and Out segment are all part of a single defined
GC column. By defining each segment of an LTM column, the GC can accurately control
column flow even though the flow may pass through different id column material with differing
film thicknesses and different thermal zones.
Figure 37.
GC Composite column parts
Analytical column
Union
GC inlet
Detector
In segment
(guard column)
Out segment
(Part of LTM
column module
and transfer line
assemblies)
