Specac Silver Gate, Руководство пользователя

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User Manual
16
Purging the Optical Unit
The Silver Gate™ ATR Accessory is fitted with purge ports (
11 ). The
purge port connections are fitted with rubber caps. To purge the optical
unit the rubber caps are removed and a suitable size of flexible rubber
tubing can be pushed over the ¼” hose connection fittings at the purge
ports to enable the unit to be filled with a purge gas, e.g. Nitrogen.
To enable the optical unit to be purged it is necessary to fit the flexible
purge bellows (
12 ) to the optical unit at the aperture ports ( 10 ). (See
Figure 9.) The purge bellows grip fit around the circumference of the
aperture ports and bridge any gap between the optical unit and the
spectrometer sample compartment bulkheads from the source and to
the detector. If the gap/distance between the optical unit and bulkhead
is small, the purge bellows can be cut to size. It is best to cut all the
way around and in between one of the ridged grooves in the bellow
moulding itself.
Figure 9.
Silver Gate™ ATR Accessory – Optical Unit with Bridge and
Clamp Anvil Assembly, Flat ATR Crystal Top Plate Assembly
and Purge Bellows
12
Faces of bellows
to be flush fit
with bulkhead