Sequoia LISST-200X, Руководство пользователя

Страница: 105 / 112

LISST-
200X User’s Manual
97 Appendix I: Path Reduction Module
Description
Using the PRM
The PRM consists of a highly polished quartz cylinder and mounting
hardware. The quartz cylinder is pressed against the smaller transmit
windows, with a drop of water trapped between them to prevent an air
gap (which would make the background scattering much higher and
less stable). The plastic holder and spacers hold the quartz cylinder in
place during deployments. The parts and installation instructions are
shown below.
The following pages show details of:
1. Installing the PRM
2. Software Configuration for PRM Use
3. Background Collection with PRM
4. Removing the PRM
5. Maintaining and Storing the PRM
1. Installing the PRM
1
•
Locate all the components of the LISST-200X Path Reduction Module as
shown below.
•
The parts include quartz cylinder with retaining ring, PRM Plate, two white
PRM Plugs and two 4-40 x 7/8 socket head cap screws and an o-ring (size
2-016) that is pre-installed between the quartz cylinder and the PRM Plate.
•
Remove the plugs from the plate before installation.
2
•
Secure the 200X in a vertical orientation with the optics endcap on the top.
•
Clean the optics endcap cavity.
•
Clean the windows with alcohol or glass cleaner, and use compressed air to
remove any particles.
3
•
Clean both ends of the PRM quartz cylinder with alcohol or glass cleaner.
•
Put a large drop of filtered water on top of the quartz (see photo below)
•
Insert the PRM Plate into the 200X optics head, without allowing any part of
it to touch the upper window of the 200X, until it is centered.
Plug
Plug
Quartz
cylinder
Retaining
Ring
Plate