MP5A Operation and Maintenance Manual
________________________________________________________________________________________________________________
Copyright
©
2023
‐
2024
Halogen
Systems,
Inc.
All
rights
reserved
worldwide.
Rev.:
4.02
20
7.
Maintenance
7.1.
Wastewater Maintenance
The
Halogen
MP5
sensor
is
very
low
maintenance
and
can
be
installed
in
either
Wastewater
or
Drinking
Water
Applications.
Since
there
is
no
membrane
or
electrolyte,
the
maintenance
cycle
is
dramatically
longer,
and
cleaning
tasks
are
usually
not
needed.
The
sensor
has
an
integrated
cleaning
system
using
polymeric
beads
the
cleans
all
the
electrodes,
including
the
pH
sensor
cartridge.
In
Wastewater
applications,
some
cleaning
may
be
necessary
when
visible
clogging
of
ports
occurs
due
to
biofouling
in
immersion
installations.
The
electrodes
remain
clean
but
the
flow
into
the
sensor
is
restricted
due
to
these
clogged
or
plugged
ports.
7.2.
Sensor Cleaning
When
sensors
are
installed
in
applications
with
high
iron
concentrations
or
high
biofouling,
a
buildup
can
occur
on
the
end
of
the
sensor
(strainer)
that
may
restrict
flow
through
the
sensor.
In
these
applications,
the
sensor
should
be
inspected
every
two
weeks.
If
build
up
is
present,
follow
one
of
these
two
following
procedures:
Option
1:
Metabisulfite
then
the
sensor
should
be
immersed
for
one
minute
in
a
solution
of
Potassium
Metabisulfite
(LD
Carlson
6012A).
Follow
manufacturers
recommendation
for
solution
concentration.
The
sensor
should
be
operated
during
the
cleaning
step,
rinsed,
powered
off,
then
returned
to
service.
Option
2:
Muriatic
Acid
To
acid
clean
the
sensor,
remove
the
sensor
from
process,
rinse
to
remove
any
residual
chlorine.
1.
Select
a
small
container
and
fill
with
2”
of
tap
water
and
immerse
the
sensor.
2.
Power
the
sensor
on
and
tap
lightly
to
remove
air
and
rinse
the
sensor.
3.
Drain
and
refill
the
small
container
with
1:9
parts
muriatic
acid
to
water.
4.
Place
the
sensor
in
the
container,
power
on
and
clear
air
as
in
step
2.
5.
Run
the
sensor
for
30
to
60
seconds,
remove
the
sensor,
and
rinse
as
in
Step
2.
Do
not
leave
the
sensor
in
this
solution
for
more
than
60
seconds.
6.
Return
the
sensor
to
the
process
and
check
calibration.
WARNING:
ACIDS
ARE
HAZARDOUS.
Always
wear
eye
and
skin
protection
when
handling.
Follow
all
Material
Safety
Data
Sheet
recommendations.
7.3.
Flow Cell Maintenance
The
maintenance
on
the
flow
cell
is
simple
cleaning.
The
flow
cell
is
clear
to
make
examination
of
the
condition
of
the
sensor
easier
without
interfering
with
operations.
The
flow
cell
may
be
cleaned
by
wiping
or
by
washing
with
detergents
or
diluted
acids.
Do
not
try
to
clean
with
solvents
as
the
acrylic
may
craze
or
crack.
Change
the
O
‐
ring
annually
if
worn
or
still.
The
O
‐
ring
can
be
lubricated
with
silicone
grease.
Replace
the
tubing
at
least
once
a
year.
Replace
brittle,
cracked
or
leaky
tubing
immediately.
Replace
old,
discolored,
fouled
or
damaged
tubing
with
tubing
of
the
same
diameter.
7.4.
Annual Maintenance
7.4.1
Wear Part Replacement
This
sec on
is
dedicated
to
the
vital
prac ce
of
replacing
wear
parts
in
Chlorine
Analyzers.
Wear
parts,
such
as
gaskets,
bearings,
impellers,
and
wear
rings,
undergo
natural
wear
and
tear
during
the
opera on
of
these
analyzers.
By
understanding
when
and
how
to
replace
these
components,
users
can
uphold
the
accuracy
of
their
measurements,
prolong
the
sensor's
service
life,
and
ensure
the
e
ffi
ciency
of
water
treatment
processes.