CI/AHM550–EN Rev. D
5
4
Connecting the sample lines
To make external sample inlet connections:
1. Fit a shut-off valve (not supplied) at each sample inlet.
Referring to Fig. 3:
2. Connect the sample inlet tubing
A
using flexible PVC tubing
(
1
/
4
in. ID non-flowmeter or
3
/
8
in. ID with flowmeter) to barbed
connector
B
at the base of:
sample inlet
C
(wet-section without flowmeter)
or
sample inlet
D
(wet-section with flowmeter)
3. Ensure the drain tubing
E
is kept as straight as possible and
is routed to a suitable drain.
4. Ensure the 2 drain tubes
F
from the constant-head unit
G
are kept as straight as possible and routed through the funnel
H
at the base of the wet-section. Drain tubes are
factory-fitted but may have moved in transit.
5
Connecting the standard solution
2 (high) and reagent tubing
Connections to the standard solution 2 (high) and reagent
containers (at the QD couplings) must be made on site. All other
internal wet-section tubing connections are factory-made.
Referring to Fig. 44:
1. Fill the standard solution 2 (high) and reagent containers with
the correct solutions – refer to Solution preparation.
2. Connect the standard solution 2 (high) tubing QD coupling
plug
A
to the mating connector
B
at the base of the
standard solution 2 (high) container.
3. Connect the reagent solution tubing QD coupling plug
C
to
the mating connector
D
at the base of the reagent solution
container.
Note.
Sample inlet tubing is customer-supplied.
Keep sample drains as short as possible and vertical to
enable the sample to drain freely.
Where particulate matter is present (for example,
magnetite in boiler samples) it is recommended that a 60
micron sample filter is fitted to the sample inlet line.
Fig. 3 Connecting the sample lines
Note.
If reagent and standard solutions have not already been
prepared, proceed to
Solution preparation
(overleaf).
Fig. 4 Connecting the standard solution 2 (high) and reagent tubing
QD couplings
Standard Solution 2
(High) tank – 400 ml
Reagent Solution
tank – 200 ml
Filler caps
