Vaisala DMP248, Руководство по эксплуатации

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C
HAPTER
3 _______________________________________________________________
INSTALLATION
V
AISALA
_________________________________________________________________________ 19
Dimensions of the metal plate FRONT VIEW TOP VIEW
process
pipe
S
A
M
P
L
E
C
E
L
L
C
L
A
S
P
N
U
T
.
D
M
P
2
4
8
S
C
T
H
IS
E
D
G
E
,
IN
T
E
R
A
G
A
IN
S
T
P
U
S
H
P
R
O
B
E
T
IG
H
T
E
N
T
H
E
screw
G1/4
S
ISO
228/1
G1/4
S
metal
hose
clamp
6
6
thread M6 or
1/4"-20 UNC
40
68 80
28
metal
plate
thickness e.g.
3mm (1/8")
AISI 316
F
IGURE
3-15
Fastening to a process pipe with the help of a metal
plate
An overpressure in the process is necessary to create a flow through
the sample cell. Note that the pressure of the sample cell must not
differ from that of the process because dewpoint temperature changes
with pressure. In dirty processes, it may be necessary to use a filter
between the cooling coil and the sample cell. One more simple way of
using the sample cell with user provided accessories is shown in
F
IGURE
3-16
. The flow through the sample cell is controlled with the
needle valve and the pressure is kept equal to that of the process.
F
IGURE
3-16
Installing the probe in high temperatures (an example).
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