Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers
3 Installation
OI/AXM630–EN Rev. I
17
3.6 Preparing the Analytical Section
3.6.1 Connecting Sample Inlet and Drain Lines
The sample pot fills with sample and over-flows at the top to
maintain a constant head from where sample is taken to be
measured.
The sample outlet line (
B
in Fig. 3.9) must be routed to
maintain a gravity-fed drain.
The float inside the pot contains a small magnet that operates a
reed switch. When the float is in the uppermost position the
switch is held closed. If the sample stops flowing the float drops
slowly, allowing the reed switch to open, providing a sample flow
failure indication.
Using rigid nylon tubing:
1. Connect the sample supply line to sample inlet
connection
A
(6 mm OD tubing).
2. Connect the drain line to sample outlet
connection
B
(10 mm OD tubing).
3.6.2 Connecting the Waste Line
A 0.5 m (1.64 ft) length of flexible
5
/
16
in. internal diameter PVC
tubing (
C
in Fig. 3.9) is supplied fitted to the flowcell drain
connection and routed through the grommet in the hole in the
bottom tray. Connect it to either an appropriate waste drain or
container.
Ensure the tubing is kink-free, as short as possible and routed
as vertically as possible to enable free drainage.
Note.
If necessary, a longer analyzer waste line can be
fitted but its length
must
be kept to the absolute minimum
required.
Caution.
Analyzer waste is contaminated with reagents.
Dispose of the waste in accordance with local regulations.
Fig. 3.9 Connecting the Sample Inlet, Drain and Analyzer
Waste Lines
A
B
C
Sample
Outlet –
10 mm
Sample
Inlet –
6 mm
Analyzer Waste Line –
5
/
16
in. ID
