6
…2
MECHANICAL INSTALLATION
2.3
Installing the Dissolved Oxygen Flowcell
2.3.1
Flowcell Dimensions
(without couplings fitted)
✶
Note.
• The sample flowrate must be between 100 and
500 ml/min.
• The Company recommends that stainless steel tubing
is used.
n
o
i
s
n
e
m
i
D
)
.
n
i
(
m
m
n
i
e
u
l
a
V
t
h
g
i
e
H
)
2
8
.
3
(
0
.
7
9
h
t
d
i
W
)
5
1
.
3
(
0
.
0
8
h
t
p
e
D
)
8
2
.
4
(
6
.
8
0
1
Table 2.1 Flowcell Dimensions
(without couplings fitted)
2.3.2
System Design Options – Fig. 2.7
Fig. 2.7A shows a simple system with a sample line
isolation valve (V1) and a flowmeter installed. The
dissolved oxygen sensor is removed from the flowcell
for calibration in air – see Section 6.2.2.
The alternative, and recommended, system is shown in
Fig. 2.7B. Here the dissolved oxygen sensor remains in the
flowcell during calibration in air. An extra valve (V2) is fitted to
drain the sample from the flowcell prior to calibration.
2.3.3
Connecting the Sample Lines – Fig. 2.8
Mount the flowcell vertically as shown in Fig. 2.8A. Connect
the sample inlet and outlet tubes as shown in Fig. 2.8B.
Fig. 2.7 Flowcell Schematic Arrangements
A – Mounting the Sensor Block
B – Connecting the Sample Lines
Fig. 2.8 Installing the Flowcell and Connecting the Sample Lines
Flowcell
Tundish
V1 = Sample Isolating Valve
V2 = Sample Drain Valve
V1
Drain
Flowmeter
Sample Flow
Flowcell
Tundish
V1
Drain
Flowmeter
Drain
V2
A – Simple System
B – Recommended System
Sample Outlet
Sample Inlet
Nut
Olive
Push the outlet pipe
fully into the outlet
coupling and tighten
the nut to achieve
a leak-free seal.
Slide the nut and olive
onto the outlet pipe.
Connect the sample inlet pipe
using the procedure described
in Step
3
.
Flowcell
2
3
4
Using the mounting bracket,
fix the flowcell to a vertical
surface using suitable fixings.
1
Fixing Centres
2 holes Ø6.5
67.0
(2.64)
47.0
(1.85)
Fixing Centres
Sample
Flow
Coupling
Dimensions in mm (in)
