1
Contents
1 Introduction
1
2 Description
2
2.1 Gauge
2
2.2 Display
2
2.3 Specifications
3
3 Operation
3
3.1 Power on/off
3
3.2 Measuring Procedure
3
4 Setup
7
4.1 Measurement Settings
8
4.2 System Settings
9
5 Calibration and Maintenance
11
5.1 Calibration
11
5.2 Maintenance
14
1 Introduction
Designed for non-destructive coating thickness
measurement, the models of the coating thickness gauge
is with built-in sensor. It works on the magnetic induction
principle and conforms to the following industrial norms
and standards:
GB/T 4956, JB/T 8393, ISO 2178, ASTM
B499
The Coating Thickness Gauge is suitable for
non-destructive, quick and precise coating thickness
measurement. Easy to handle they are the ideal
2
instrument for the finishing industry, electroplating, ship
and bridge building, aircraft construction and the
engineering and chemical industry.
The Coating Thickness Gauge works on the
magnetic-induction principle for measuring the thickness
of non-magnetic coatings(such as paint, enamel, rubber,
aluminum, chrome, cupper, tin etc.) on magnetic metal
substrates(ferrous bases and steel, also on alloyed steel or
on hardened magnetic steel, but not on austenitic steel or
weak magnetic steel).
2 Description
2.1 Gauge
2.2 Display (
Fig.2-3)
Probe
LCD
Keypad
Fig. 2-1
Fig. 2-2
Up
Down
Power
/ Zero
Menu
Fig. 2-3
Battery
Measured
Point
Mean
Value
Measured
Value
Mode
Single
Continue
3
2.3 Specifications
Test Method: Magnetic induction
Measuring Range: 0~1250mm (0 ~50mil)
Resolution: 0 ~ 999μm: 0.1μm, ≥1000μm:
1μm
Accuracy: up to 100μm: ±2.5μm; 100 ~
1500 μm: ≤ 2.5 %
Data Memory: up to 500 readings.
Display: Graphic LCD with backlight
Operating temperature : 0 ~ 50°C
Dimension: 150X50.5X29 mm
Weight: 170 grs
3 Operation
3.1 Power on/off
Push
until the power is turned on.
NOTE: If there are magnetic metals near the probe at the moment
of swatch on, the gauge will display a alarm “Surround
Error!".Should take gauge far from magnetic metals and wait few
seconds it can go normal.
When the gauge is switched on, press
a while to turn
the power off.
NOTE: This gauge can power off automatically, if no any operation
for 3 minutes. Before turning off, it will sound for a few beep
prompt.
If you do not want to power off, simply press any key can
abort.
3.2 Measuring Procedure
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3.2.1 Parameters selection
First, confirm measuring parameters should suitable for
your requirements.
a) Measurement Mode.
There are two modes: Single Mode
and Continuous
Mode
. It's displayed in the upper left corner of the LCD
display.
It is usually to choose Single Mode, that is, when a
measurement is completed, you should lift the probe and
then the next point measurements. In this mode, the
measurement data can be stored automatically and
calculate mean value.
Select "Continuous Mode", you can slide the probe on
measuring surface for measurement continuously.
However, this mode will not perform the data storage and
statistical processing.
b) Measurement Units
The instrument has two kinds of units available for
selection: μm (microns) and mils (micro inch).
3.2.2 Accuracy verification
a) Using a calibration substrate and Standard thickness foil
to verificate the instrument. Generally if the
measurement
error is not out of the accuracy of specifications it can be
used normally.
Methods:
Select a Single Mode and μm, press the probe on the
surface of the substrate, push
for zeroing. Place a foil
5
Fig. 3-1
on the substrate to measure. Comparing the measured
value and the standard value of the foil to obtain the
measurement error.
b) If the error is large, the calibration is need for, (see
5.1
Calibration
).
3.2.3 Test piece ready
a) Test-piece should be ferromagnetic base material is
coated with a non-magnetic coating;
b) The measuring surface should be regular, smooth;
c) The thickness of the test piece is not less than 2mm;
d) The measuring surface should be clean and free of
grease.
3.2.4 Measurement
Press the probe perpendicular to
the surface of the test piece (Fig.
3-1).
When the thickness values is
obtained, a sound is uttered.
In Single Mode, then you can lift
the instrument to read, or do the
next measurement.
In Continuous Mode, then you
can move the probe to the next
measurement position.
NOTE:
In Single Mode, you need to lift the
6
Mean
Value
Measured
Points
Measuring
value
instrument away from the test surface 10cm or more, and the
time interval between two measurements should be no less than
1 second.
Use Continuous Mode often, may cause the probe wear
and galling test surface is easy. We therefore recommend
to use Single Mode for normal measurements, if not
necessary.
3.2.5 Data read and browse
a) Read measuring value
Read the measured value from the LCD. (Fig. 3-2)
NOTE:
The maximum points for the statistical set is 9. It will start the
next statistics set automatically if more than 9 points. Enter the
menu or push
will renew statistical set and average.
b) Data Browse
In Single Mode, each measuring value is stored
automatically
In the
measuremen
t mode, you
can press
to
Fig.3-3
Thickness
No.
Fig.3-2
7
Fig. 4-1
browse them. (Fig. 3-3)
Press
for page up and down.
Press
to exit the browser and return to measurement
mode.
NOTE: The gauge can store up to 500 of measurement value. The
greatest number is the most recent measurement.
After the data store reaches 500, the following data will be stored
and pile out the first data automatically. Therefore, record the
useful data as soon as possible for not to lose.
3.2.6 Passing measurement
a) In the Single Mode, you can also be set upper and lower
limits for passing judgment and screening tests.
b) When the measured value exceeds the tolerance, it will
sound indication.
c) To set upper and lower limits, see
4.1.2 Upper and
Lower Limits
.
4 Setup
The gauge uses a menu for
setting the parameters or
the functions.
The structure of setup
menu is shown in Fig 4-1.
In the measurement mode,
press the "Menu"
to
enter the setup menu.
Press the "Up"
or
COATING THICKNESS GAUGE
CF1250
OPERATION MANUAL
www.accud.com
