3
Column Modules
22
User Guide
Overview
The LTM oven door mounts up to two module assemblies. Each module assembly consists of
a column module mounted onto a transfer line module. (See
for
definitions.)
It is important to read through these instructions before attaching a column module to a
transfer line module. It is usually more convenient to complete this module assembly on a
desktop or table top, rather than at the LTM oven door. The completed module assembly then
slips into the LTM oven door for final attachments.
The overall process for installing a column for the LTM system is:
1
Remove the existing column module or cover plate from the LTM oven door.
2
If not present, install the appropriate fan bracket.
3
Install the column module onto the transfer line module.
4
Attach the column ends to unions on the transfer line module.
5
Install the transfer line and column module assembly into the LTM oven door.
6
Connect the in and out column segments from the GC inlet and detector to the transfer line
module unions.
The standard module size contains a 12.7 cm (5 inch) column coil. This coil size is compatible
with delicate PLOT columns and fused silica capillary columns with inner diameter ranging
from 0.1 mm to 0.53 mm. It also cools faster because of the larger surface area of the
capillary GC column assembly. The transfer line module for the 12.7 cm coil module uses a
horizontal pair of slots in the LTM oven door. The standard format size column module slides
to a predetermined position and then screws down for easier assembly.
shows a
completed 12.7 cm (5 inch) coil module assembly.
Figure 9.
5-inch column module and transfer line module assembly
Содержание LTM II Series
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