LD500 CEM system accessories
8
Windows should be cleaned when:
• There are visible deposits of dust or liquid residuals, and
• Any signs of oil deposits on the windows (See purge air - instrument air quality)
2.3 The optical fibres
Three qualities of laser optical fibres are available for the LD500 system. The standard fi-
bre OF010 can be used in most applications. However, in applications where oxygen is
measured, the fibre OF005 should be used.
The optical communication fibre CF120 is used for data transmission.
Purge air cassette PW061
1 Window holder with removable window
2 Swagelok gas port, 6 mm
3 1 1/2” outer thread
NOTE: When servicing the units, only remove one window at a time. The windows pro-
tect the optical parts in the emitter and receiver, and at least one window must be in
place at all times to prevent damages to the units.
Note: During installation, complete the installation of the PW061 purge air unit,
including instrument air connections before proceeding to mount the emitter/receiver.
Fibre Specification
OF010-xxx Laser optical fibre, xxx = meters
OF005-xxx Laser optical fibre used with laser module LH515, xxx = meters
CF120-xxx Optical communication fibre, xxx = meters
igure 2.1. The purge air cassette PW061 should be inserted between each of the emitter
receiver, and the pipe flanges.
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