5
'
î;ï _;‘
;
'
:
…
.
.
—.5
‘
;
;s>
>
«.
,
*
;———
…
z»;,
,
,
“ë»Ê
;
;
;»:“
€v€ä
15
…
-;
;
--.;…;…; ;ê .;
Ëïî
_
_
_
.
ï“… ;
;
â
’
531; ; …
ç,
,
-
»
‘
,
.
»
i
,
»
;
'
“
s
a
;;am
9
:
;
a
;
.
,
";
_;-ïiîè;
.
'
"
;
7
'
î
;
»
‘
“;
{
î
“
=
%
‘
î
!
;
.
-
_
'
8
;
“
:
,.
î
;
;
.
_
-
"i
;
;
l
“
l
:
if
,
â
‘
l
…
.
Ê
’
; %
:
;
;
;
7“
;
;
;;_î,
FIGURE
l8. Automatic
unloadmg of trays … a
'
'
'
’
controlled or incrt gas atmosphere.
FIGURE l7. Determination of the end of the drying
cycle after a constant high operation pressure.
(The peaks are the short time pressure rises after
the vacuum system has been sealed o.)
a.
v
a
[)
…
.
_
.
;
s—
FIGURE 19
a.
Gas sampling from a pilot freeze-drying plant.
b. Gas sampling from a can.
»
',
Ü
|
FIGURE 20. Gas chromatograph for oxygen measu—
f.î_.
rement for automatic recording.
=