TB400-en-GB_V1.3 8/16
4
Calibration
A
complete
calibration
will
require
testing
with
both
0
NTU
and
100
NTU
test
solutions.
Ensure
that
the
sides
of
the
bottle
are
clean
and
dry
to
prevent
measurement
errors.
Calibration
Procedure
(0
NTU
and
100
NTU)
Note:
Make
sure
you
complete
the
calibration
steps
with
as
little
time
as
possible
between
the
0
NTU
and
the
100
NTU
test
bottles.
1.
Insert
the
Zero
NTU
solution
bottle
into
the
testing
chamber,
line
up
the
white
marks,
and
close
and
latch
the
cover.
Turn
on
the
meter
and
Press
and
hold
the
"CAL"
button
until
the
LCD
displays
"CAL"
then
release
the
“CAL”
button.
2.
Wait
one
second
and
then
the
LCD
will
display:
Note:
If
the
LCD
does
not
display
zero
when
using
"0
NTU"
liquid,
press
the
"ZERO"
button
continuously
until
the
LCD
displays
a
zero
value.
3.
The
meter
is
now
ready
for
"0
NTU"
calibration.
4.
Momentarily
press
"CAL"
button.
The
LCD
will
flash
CAL
for
about
10
seconds
and
then
show
the
following
display:
5.
The
LCD
will
then
display:
6.
Lift
the
lid
on
the
test
chamber
and
remove
the
0
NTU
test
solution
bottle.
CAL
ntu
0.00
CAL
ntu
CAL
0.00
ntu
100
CAL
ntu
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