Gateway™ ATR Flow Through Top Plate
13
2) Between the underside of the clamp plate (
10
) and the ATR crystal
(
7
) there is a protective lead pad (
11
). Carefully remove the clamp
plate (
10
) away to gain access to the lead pad (
11
). (See
Fig 7
.) The
lead pad (
11
) may be stuck close to the underside of the crystal (
7
)
and so it needs to be removed very carefully away from the crystal.
Note:
The lead pad (11) will be needed in any re-assembly after
cleaning of parts or if replacing with a new crystal (7).
Fig 7. Lead Pad on Underside of ATR Crystal
3) If the lead pad (
11
) has adhered to the crystal (
7
), then it may be
easier to remove it carefully away from the crystal when the crystal
(
7
) itself has been removed from its centralised position in its
recess of the main body plate (
4
). Therefore, support the crystal (
7
)
and the lead pad (
11
), with one hand and turn over the Top Plate
assembly so that the crystal (
7
) can fall out to drop into the palm of
your hand. If the crystal (
7
) is also stuck in the main body plate (
4
)
because of good sealing to the Isolast gasket (
8
) between the top
(sampling) surface of the crystal (
7
) and the top section plate (
6
),
then put a soft pad or tissue on the work bench area and lay the Top
Plate assembly onto it the same way up as it would be used when
fitted to the optical unit. Block one of the sample flow ports (
5
) and
connect the other port (
5
) to a clean, dry compressed air line and
allow a little pressure into the system. This should dislodge the
crystal (
7
) from the body plate (
4
) to fall onto the soft pad or tissue.
7
4
11
