10
INS/ANAINST/025-EN Rev. B
| Navigator ADS551 | Low level dissolved oxygen | Replacement / Upgrade procedures – wet section spares
7.2 Upgrading the drain valve assembly
Upgrade kit part number:
— AW502 240
Referring to Fig. 7.2:
1.
Unscrew and remove blanking plug
A
(with O-ring)
at base of flowcell assembly
B
.
2.
Fit sealing washer
C
to male adaptor coupling
D
, screw
this assembly into flowcell base
B
and tighten.
3.
Fit Boded seal
E
onto thread of male stud coupling
F
,
screw into the upstream port of the drain solenoid valve
G
and tighten – note arrow position on valve body.
4.
Wrap PTFE tape around the thread of barbed connector
H
and screw into the outlet port of the drain solenoid
valve
G
.
5.
Offer drain solenoid valve assembly
G
up to male adaptor
coupling
D
and push onto spigot; orientate the valve (as
shown in Fig. 7.2) and tighten couplings
D
and
F
together – ensure couplings are fully tightened.
6.
Fit the supplied length of drain tube
I
onto the barbed
connector
J
on drain valve
G
and route as short and
straight as possible to a suitable drain.
7.
Remove blanking plug
K
from the underside of flowcell
PCB housing
L
and replace with supplied cable gland
and O-ring
M
.
8.
Feed cable
N
from drain solenoid valve assembly
G
through the cable gland
M
and make connections to
PCB terminal block TB3 – refer to Fig. 6.7, page 7.
9.
Tighten cable gland
M
to form a watertight seal.
Referring to Fig. 7.1, page 9:
10. Check sample outlet tube
G
is located correctly over
tundish assembly
H
and restart sample flow.
Referring to Operating instruction OI/ADS550-EN:
11. Configure the transmitter by selecting
Sensor Setup
,
scrolling to
Calibration Valve
and selecting
Enabled
.
(This enables auto calibrations to be configured.)
IMPORTANT (NOTE)
There will be sample left in the flowcell so it is
advisable to have a beaker or similar receptacle
to catch the sample.
Fig. 7.2 Upgrading the drain valve assembly
A
B
C
D
E
F
G
H
I
J
K
M
L
Correct drain
valve orientation
Upgraded drain valve
fitted and connected
