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Sentry multizone instructions
Introduction
Sentry
mutizone
is a microprocessor based multi-zone corrosion monitor. An LCD display and
LED’s provide indication of the vessel’s level of cathodic protection. The multizone capability of the
Sentry
mutizone
allows up to three independent zones on a vessel to be simultaneously monitored.
For example, the external hull may represent one zone, other zones may include the insides of sea
chests, ballast tanks, water jet tunnels etc. Each zone requires a reference electrode to be installed.
The
Sentry
multizone
kit comprises a multizone monitor, mounting screws, batteries and an earth
lead.
For our other corrosion monitor products visit our web site at
www.seaguard.co.nz
Sentry multizone installation
1
2
3
zone
under
ov
er
pr
ot
ec
te
d
test
Box
outline
Box mounting
hole locations
E 1 2
3
Connect to hull
Zone 1
ref electrode
Zone 2
ref electrode
Zone 3
ref electrode
83.5
5
2
.5
a. The
Sentry
can be bulkhead mounted in any
convenient location such as in the engine
room or in the vessel’s bridge/pilot house.
The box dimensions are 115 mm x 65 mm x
40 mm deep.
b. Drill two 3.7/3.8mm diameter holes at 83.5
mm by 52.5 mm centers on the hull bulkhead
or other suitable mounting location.
c. Remove the
Sentry
lid. Mount the box using
the two 8g x 12 mm self tapping screws
provided.
d. Insert the 3 x AA batteries supplied. Refasten
the
Sentry
lid making sure that the desiccant
pack remains inside.
e. Connect terminal E to the hull with the black
earth lead provided.
f. Connect terminals 1,2 & 3 to the blue
reference electrode wires for zones 1,2 & 3
respectively.
Note
: The reference electrode is purchased
separately.
Sentry test
Mount the
Sentry
and reference electrode as described above.
Once re-assembled press the ‘test’ button and check that all lights illuminate briefly.
During this lamp test check that the appropriate material is displayed on the LCD (‘ALU’ for
Aluminum, ‘FE’ for Steel or ‘Br’ for bronze).
