Instruction Manual
DIGITAL COATING
THICKNESS GAUGE
( F & NF TYPE)
CM-8855
ALL RIGHTS RESERVED
3.FRONT PANEL DESCRIPTIONS
1.FEATURES
* It meets the standards of both ISO2178
and ISO 2361 as well as DIN, ASTM
and BS. It can be used both in the
laboratory and in harsh field conditions.
* The F probes measure the thickness of
non-magnetic materials (e.g. paint,
plastic, porcelain enamel, copper, zinc,
aluminum , chrome etc.) on magnetic
materials (e.g. iron, nickel etc.) . often
used to measure the thickness of
g a l v a n i z i n g l a y e r, l a c q u e r l a y e r,
porcelain enamel layer, phosphide
layer, copper tile, aluminum tile, some
alloy tile, paper etc.
* The N probes measure the thickness of
non-magnetic coatings on nonmagnetic metals. It is used on
anodizing, varnish, paint, enamel,
plastic coatings, powder, etc. applied
to aluminum, brass, non-magnetic
stainless steel, etc.
* Automatic substrate recognition.
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3-12
3-11
3-19
3-2
3-10
3-8
3-3
3-5
3-7
3-4
READ
3-6
DEL
3-9
Fig. 1
3-1
3-1 Probes Inbuilt
3-2 Display
3-3 Power/Zero Key
3-4 Plus Key
3-5 Minus Key
3-6 Reading Key
3-7 Deleting Key
3-8 Jack forRS232C
3-9 Battery cover
3-10 Wrist Ring
* Manual or automatic shut down.
* Two measurement mode: Single and
Continuous
* Wide measuring range and high
resolution.
* Metric/Imperial conversion.
* Digital backlit display gives exact
reading with no guessing or errors.
* Can communicate with PC computer
for statistics and printing by the
optional cable.
* Can store 99 groups of measurements.
* Statistics is available.
3-13
3-20
3-14
3-15
3-21
3-16
Fig. 2
3-17 3-18
3-11 Low Battery Indicator
3-12 Measuring Symbol
3-13 Last Reading /Browsing Value
3-14 Single Measurement Mode
3-15 Max. Indicator Value
3-16 Min. Indicator Value
3-17 Browsing State
3-18 Measuring State
3-19 Unit
3-20 Average Indicator
3-21 Substrate Indicator
3-22 Counter For Storing
3-23 Counter For Statistics
3-22
3-23
2.SPECIFICATIONS
Display: 4 digits LCD, backlit
Range: 0~1250 μm/0~50mil
(other range may be specified)
Resolution: 0.1 μm (0~99.9μm)
1 μm (over 100μm)
Accuracy:±1~3%n or 2.5 μm or 0.1mil
(Whichever is the greater)
PC interface:
with RS-232C interface
4.MEASURING PROCEDURE
4.1 Press the power key to switch on the
power and '0' displays on the Display.
The gauge will restore the last
operation on display itself, with 'Fe'
or 'NFe' symbol showed on Display.
The gauge enters the auto mode
which can automatically recognize
the substrate itself.
4.2 Press the probe on a coating layer to
be measured. The reading on the
display is the thickness of the coating
layer. The reading can be corrected
by pressing the Plus key and Minus
key while the probe is away from the
substrate or the measurement body.
4.3 To take the next measurement ,just
lift the probe to more than 1
centimeter and then repeat the step
above . The gauge can memorize the
continuous measuring value
automatically with statistic
measurement times, Meanwhile, the
Power supply: 2x1.5 AAA(UM-4) battery
Operating condition:
Temp. 0~50℃
Humidity <95%
Size:
126x65x35 mm
5.0x2.6x1.6 inch
Weight:
about 81g
(not including batteries)
Standard accessories:
Carrying case ...................1 pc.
Operation manual ............ 1 pc.
F probe in built .................1 pc.
NF probe in built...............1 pc.
Calibration foils ..............1set.
Substrate (Iron) ................1 pc.
Substrate (Aluminium)......1 pc.
Optional accessories:
RS-232C cable & software:
USB adaptor for RS-232C
max ,min and average value will
show on Display.
4.4 To change the measurement unit 'um'
or 'mil' by Depressing Power key
and not releasing it till 'UNIT' on
the Display and then pressing Zero
key (3-3) .
4.5 To change measurement mode from
the single to continuous or vice visa,
just depressing Power key and not
releasing it till 'SC' on the Display
and then pressing Zero key (3-3). The
symbol 'STATS' represents single
mode .
5. STATISTICS
The gauge calculates and displays a
statistical analysis of readings as they
are taken.
The statistics available are:
* Last value
* Mean value marked by Ave
* Highest Reading marked by Max
* Lowest Reading marked by Min
* Number of Readings taken
To clear the statistical data when starting
a new set of data, just press and release
the ZERO key. In the measurement mode
marked by SV, last value could be deleted
singly by pressing the 'DEL’ key and restatistics is calculated and displayed itself.
6 . S TO R I N G A N D R E C A L L I N G
READINGS
6.1 Readings taken are automatically
saved to the memory of the gauge.
The memorized data can be browsed
by pressing and releasing the 'RD'
key to enter into the browsing state
marked by 'READ' on the display.
6.2 In the browsing state, all the readings
memorized can be recalled on the
display by depressing the plus key
' ' or the minus key ' '.
6.3 To delete singly a memorized value
in the memory, just locate the reading
to be deleted by the key ' ' or ' ' ,
then press and release the key 'DEL'.
10.4 If the instrument is not to be used for
any extended period , remove batteries.
11. CONSIDERATIONS
11.1 In order to weaken the influence of
the measured material on the
accuracy of measurement, it is
recommended that the calibrations
should be done on the uncoated
material to be measured.
11.2 Probes will eventually wear. Probe
life will depend on the number of
measurements taken and how
abrasive the coating is. Replacement
separate can be fitted by qualified
persons only.
12. RESTORE FACTORY SETTINGS
12.1 When to restore
It is recommended to restore factory
settings in the one of following cases.
A. The gauge does not measure any more.
B. Measurement accuracy is degraded
caused By environmental
conditions change greatly.
12.2 How to restore?
If there is an "Err0" on the display, it
indicates there is no reading to delete
a n y m o r e . 6 . 4 To q u i t t o t h e
measurement state, just depress the
'ZERO' key.
7. DELETING READINGS
7.1 To delete a reading on the display, just
press the key 'DEL' no mater in the
measurement state marked 'SV' or in
the browsing state marked by 'RD'.
Go into the browsing state by 'RD'.
Go into the browsing state by pressing
the 'READ' key while entering the
measurement state by pressing the
'ZERO' key.
7.2 To delete all the readings in the
memory, just depress the 'DEL' key in
the measurement state marked by 'SV'
on the display for about 4 seconds till
the number of readings memorized
becomes 0.
PC, please always click 'the continue'
button in the installing process.
8.2 Connect your gauge to your PC
using the optional cable.
8.3 Switch on your gauge and ensure the
Reading Screen is displayed.
8.4 Start the software and follow the
instructions included with the
software Demo.EXE.
9. CALIBRATION
9.1 Zero adjustment
Zero adjustment for 'Fe' and 'NFe'
should be carried out separately. Take
the iron substrate if 'Fe' on Display,
while take the aluminium substrate if
'NFe' on the Display. Place the probe
(3-1) on the substrate steadily. Press
the zero key (3-3) and '0' will be on
the Display before lifting the probe.
If pressing the ZERO key but the
probe is not placed on the substrate or
an uncoated standard. The zero
adjustment is invalid.
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8. TRANSFERRING READINGS
TO A COMPUTER
8.1 Install the RS232 software on your
Restore factory settings includes 'Fe'
setting and 'NFe' setting. You can
restore one of them or both of them
respectively. Please follow procedures
below to restore factory setting.
12.2.1 Please note the symbol on the
display is 'Fe' or 'NFe'.If 'Fe' is on the
display,the operation below is restoring
the factory setting for 'Fe' type,and if
'NFe' is on the display,the operation
below is restoring the factory setting
for 'NFe' type.
12.2.2 Depress Power key and not release
it till 'CAL' appears on the Display. It
is about 12 seconds from starting
depressing Power key.
12.2.3 when F:H or nF:H is on Display,
lift the probe to more than 5
centimeters,then press the Zero key
again and the gauge return to
measurement state. The factory
setting is restored. Remember, to
restore setting is restored. Remember,
to restore factory setting should be
done within 6 seconds at every stage. Or
the gauge will quit itself and restoration is
invalid.
13. Notes
13.1 Settings includes restoring factory
setting, unit setting, S/C setting,
which should be done within 6
seconds at every stage, or the gauge
will quit itself and keep its status
before.
13.2 It is strongly recommended that no
changes should be made to the value
of Ln (controlled by power key, It
takes about 14 seconds from starting
depressing Power key. Its value can be
changed by plus/minus key after
displaying Ln and releasing the power
key. Store its value and quit by
p r e s s i n g Z e r o k e y. ) w h i c h w i l l
seriously affect the accuracy. Its
value can be adjusted by
professional persons only under the
cases of replacing a new probe or
making the gauge more accurate.
9.2 Select an appropriate calibration foil
according to your measurement range.
9.3 Place the standard foil selected onto
the substrate or the uncoated standard.
9.4 Place the sensor (3-1) mildly onto the
standard foil and lift. The reading on
the display is the value measured. The
displayed reading value can be
adjusted by pressing the plus key (3-4)
or minus key (3-5) while the probe is
away from the substrate or the
measured body.
9.5 Repeat step 9.4 until the result is correct.
10. BATTERY REPLACEMENT
10.1 When it is necessary to replace the
battery, i.e. battery voltage less than
approx. 2.2V , the battery symbol ' '
will appear on the Display.
10.2 Slide the Battery Cover ( Fig. 1 ,
3-9) away from the instrument and
remove the batteries.
10.3 Install the batteries (2x1.5V
AAA/UM-4) correctly into the case.
Generally, the larger the value of Ln,
the smaller the reading on a same
thickness . Alittle variation of value
of Ln will cause a great change in
reading at high end (e.g at 500
um/20mil).The rules to adjust the
value of Ln are as follow:
A. Reading at low end can be adjusted to
the exact value by the plus or minus
key.
B. To enlarge the Ln if reading at low end
(e.g at 51 um) is ok but reading at
high end (e.g at 432 um) is too large.
On the coutrary, to decrease the Ln if
reading at low end (e.g at 51 um)is ok
but reading at high end (e.g at 432
um) is too small.
C. Repeat procedures from A to B till the
readings on the every standard foil
are satisfying the accuracy.
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