MP5A Operation and Maintenance Manual
________________________________________________________________________________________________________________
Copyright
©
2023
‐
2024
Halogen
Systems,
Inc.
All
rights
reserved
worldwide.
Rev.:
4.02
10
SELECT
Accepts
the
value
Move
Cursor
Right
Move
Cursor
down
Increment
a
digit
or
move
cursor
up
Decrement
a
digit
or
mover
cursor
down
>
Cursor
used
to
select
items
in
a
list
_
Cursor
for
digits
‐
indicates
digit
that
will
be
edited.
BACK
Moves
one
level
back
in
Menu
Meaning
of
Indicators
CHL
:
This
is
the
level
in
ppm.
pH:
The
relative
acidity
or
alkalinity
of
the
water.
ORP
:
ORP
is
short
for
Oxidation
Reduction
Potential.
This
is
another
parameter
that
indicates
the
effectiveness
of
the
TRO
in
killing
organisms.
It
has
a
logarithmic
relationship
to
TRO
and
is
used
for
a
qualitative
comparison
only.
The
reading
is
a
voltage
in
millivolts.
PSU:
(if
Set
instead
of
CND)
Practical
Salinity
Unit.
Measurement
of
salinity
and
refers
to
the
salt
concentration
in
seawater.
Temp
:
This
indicates
the
temperature
in
degrees
C
or
F.
It
will
also
display
below
zero
values.
CND:
Conductivity
(default)
in
µS/cm
units.
This
is
a
measure
of
water’s
ability
to
pass
an
electrical
current.
5.1.
Calibration
Determine
the
level
using
a
known
method.
Instructions
for
a
Hach
Colorimeter
are
included
in
the
Appendix.
We
recommend
that
calibration
be
checked
or
completed
as
follows:
1.
Calibration
check
upon
initial
installation
and
normal
process
conditions.
2.
Check
calibration
at
least
every
six
months.
3.
If
the
value
deviates
by
more
than
20%
then
recalibrate
the
sensor.
Since
there
is
some
variation
in
DPD
grab
sample
measurements,
we
suggest
no
action
unless
the
deviation
is
20%
instead
of
15%
to
allow
for
this
added
potential
error.
The
sensor
should
be
calibrated
in
water
with
a
chlorine
level
between
in
a
range
for
your
sensor
model.
This
is
found
in
the
Specifications
Page.
If
levels
in
the
water
are
rapidly
changing,
it
will
be
impossible
to
calibrate
the
sensor
in
situ.
In
that
case,
follow
these
steps.
1.
Remove
the
sensor
and
place
into
a
bucket
or
other
container.
2.
Pull
the
grab
sample
from
the
bucket.
3.
Proceed
with
the
below
steps.
5.1.1
Low Level Calibration
There
are
two
Calibration
Levels:
Low
and
High.
Both
are
independently
set.
The
first
step
is
to
calibrate
the
high
level.
If
the
low
level
is
not
accurate
then
it
can
be
calibrated
separately.
1.
The
high
‐
level
chlorine
level
for
calibration
must
be
between
0.75
and
20
ppm.
2.
The
low
‐
level
chlorine
level
must
be
between
0.1
and
0.5
ppm.
3.
If
you
perform
the
low
range
calibration
you
should
perform
a
zero
‐
chlorine
calibration
before
performing
the
low
range
calibration.
The
Sensor
will
automatically
select
the
low
calibration
if
the
known
levels
are
within
the
range
listed
in
2
(above).
It
will
select
the
high
range
calibration
if
the
levels
match
those
listed
in
1
(above).
The
steps
below
are
for
the
high
range
calibration.
To
calibrate
the
low
range,
repeat
the
steps
for
the
low
range.