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User Guide
Plate Mounted Blower Unit
3.4 Description - Blower Options
Y-piece
This optional Y-piece adaptor is used where a single blow
is capable of supplying sufficient air to both sides of the
instrument. The adaptor splits the blower air supply output
into two equal parts. The Y-piece adaptor is customer fitted at
site. Refer to fitting instructions in Section 6.
Air Pre-filter
This optional air pre-filter is used where the ambient air
(which is the source of air for the blower) has high levels of
dust or dirt particles and is too low quality for use with the
blower. The air pre-filter is customer fitted at site. Refer to
fitting instructions in Section 7.
Pressure Switch
This optional Pressure Switch provides a warning
indication if the purge air flow rate falls below the
recommended minimum. This would normally
indicate a filter blockage, a pipe blockage or a
power failure to the blower motor. Remedial action
should be taken when such a condition occurs.
Select the appropriate switch for single blower or
dual blower installations. (See Appendix 2)
The pressure switch assembly is customer fitted
at site. Refer to fitting instructions in Section 5.
Wiring instructions for connection to various LAND
instruments are given in Appendix 1.
Safety Filter
The Safety Filter is used to provide additional
protection for the optical system. The safety filter
is fitted in addition to the standard air filter. The
safety filter will quickly block up if the normal
filter element is damaged and allows dust to pass
through. The resulting drop in air flow rate will
activate the pressure switch (if fitted).
Refer to fitting instructions in Section 8.
Summary of Contents for 099.465
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