CG304-en-EU v1.1 7/14
8
Calibration
Calibration
Types
The
meter
is
factory
calibrated
before
shipment
to
the
customer;
however
the
customer
should
perform
a
zero
calibration
and
a
multi
‐
point
calibration
before
any
critical
measurements
are
taken.
The
calibration
options
are
listed
below.
Read
the
description
for
each
and
select
the
best
match
for
a
given
application.
1.
Zero
Point
Calibration:
Perform
before
each
measurement
session.
2.
One
Point
Calibration:
Use
for
high
accuracy
with
repeated
tests
on
a
constant
coating
thickness.
3.
Multi
‐
Point
Calibration:
Use
for
high
accuracy
within
a
known
range
of
coating
thickness.
4.
Calibration
for
shot
‐
blasted
surfaces.
Calibration
Considerations
The
calibration
sample
must
correspond
to
the
product
sample
in
the
following
ways:
Curvature
radius
Substrate
material
properties
Substrate
thickness
Size
of
measurement
area
The
point
at
which
the
calibration
is
made
on
the
calibration
sample
must
always
be
identical
with
the
point
of
measurement
on
the
product
itself,
especially
in
the
case
of
corners
and
edges
of
small
parts.
To
achieve
the
highest
measurement
accuracy,
perform
several
calibrations
in
succession
(for
zero
values
and
calibration
film
values).
Preparing
for
calibration
1.
Clean
the
probe
tip
(grease,
oil,
metal
scrap,
and
the
slightest
impurity
will
affect
measurement
and
distort
readings).
2.
Switch
the
meter
ON
(at
a
4”
[10cm]
minimum
distance
from
any
metal).
3.
Ready
the
supplied
metal
substrate
samples
and
necessary
films
(supplied
calibration
reference
films).
4.
The
meter
is
now
ready
for
calibration.
