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...2 MECHANICAL INSTALLATION
2.3 Installing the Dissolved Oxygen Flowcell
2.3.1 Flowcell Dimensions
(without couplings fitted)
i D
m
e
n
s
o i
n
H
e
g i
t h
W
d i
h t
D
e
p
h t
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.
Dimensions in mm (in)
A – Mounting the Sensor Block
6
V
a
u l
e
n i
m
m
(
n i
) .
9
7
0 .
3 (
8 .
) 2
8
0
0 .
3 (
1 .
) 5
1
0
8
6 .
4 (
2 .
) 8
1
Using the mounting bracket,
fix the flowcell to a vertical
surface using suitable fixings.
Fig. 2.8 Installing the Flowcell and Connecting the Sample Lines
Flowcell
Drain
Flowmeter
V1
V1 = Sample Isolating Valve
V2 = Sample Drain Valve
A – Simple System
Fig. 2.7 Flowcell Schematic Arrangements
Note.
• The sample flowrate must be between 100 and
500 ml/min.
• The Company recommends that stainless steel tubing
is used.
Sample Outlet
Slide the nut and olive
onto the outlet pipe.
Coupling
Connect the sample inlet pipe
using the procedure described
in Step 3 .
B – Connecting the Sample Lines
Sample Flow
Tundish
Flowcell
Flowmeter
V1
V2
Drain
B – Recommended System
Push the outlet pipe
3
fully into the outlet
coupling and tighten
the nut to achieve
a leak-free seal.
2
Nut
Olive
4
Sample Inlet
Sample
Flow
Tundish
Drain
Flowcell
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