14
Installation and initial startup
BlueShadow Detector 40D Instructions V7647
4.4.1 Changing the optical path length of the prepara-
tive flow cell
At delivery, the optical path length of a preparative flow cell is set to
2 mm at the factory . This path length can, however, be set to 2 mm,
1 .25 mm or 0 .5 mm . To reduce it to 1 .25 mm or 0 .5 mm, proceed as fol-
lows:
Procedure
Process
Figure
1.
Remove the threaded ring
1
using a hexagonal spanner .
2.
Remove stainless steel cover
2
and the PEEK spacer
3
.
3.
Insert the stainless steel cover
again and carefully tight-
en the threaded ring again
(1 Nm) .
4.
The missing spacer causes
the light guide
4
to be pus-
hed deeper into the flow cell
(0 .75 mm), resulting in a shor-
tened optical path length of
1 .25 mm . To further shorten
down to 0 .5 mm, the PEEK
spacer on the other cell side
must also be removed .
Fig. 4:
Shortening the optical
path length
1
2
3
4
