NDT DC-3000C Series User manual

Ultrasonic Thickness Gauge
DC-3000C series
Instruction Manual
V.2.05

CONTENTS
1. General Description .....................................................................- 1 -
2. Technical Specifications................................................................- 1 -
3. Standard Delivery ........................................................................- 2 -
4. Overview the Display Unit............................................................- 2 -
5. Keypad Functions.........................................................................- 3 -
6. Display Screen..............................................................................- 4 -
7. Preparation before measurement.................................................- 5 -
【7.1】Preparation of the instrument ..............................................- 5 -
【7.2】Selection of the Probe ...........................................................- 5 -
【7.3】Treatment of the measured surface......................................- 6 -
8. Basic Gauge Operations................................................................- 6 -
【8.1】Switch on ...............................................................................- 6 -
【8.2】Probe Zero .............................................................................- 6 -
【8.3】Contrast .................................................................................- 7 -
【8.4】Measurement mode..............................................................- 7 -
【8.5】Setting....................................................................................- 9 -
【8.6】Memory ...............................................................................- 12 -
【8.7】Function...............................................................................- 14 -
9. Measuring technology................................................................- 16 -
【9.1】Measuring methods...........................................................- 16 -
【9.2】Pipeline measurement method.........................................- 17 -
10. Maintenance and precautions ..................................................- 17 -
【10.1】Power check.......................................................................- 17 -
【10.2】Precautions........................................................................- 17 -
10.2.1 General precautions ............................................................ - 17 -
10.2.2 Precaution during the measuring........................................ - 17 -
APPENDIX 1: Sound Velocity Measurement Chart..............................- 19 -

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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1. General Description
The Ultrasonic Thickness Gauge DC-3000C/DC-3020C is our new and
improved readout unit with automatic probe recognition, automatic
zeroing and a larger, more easily read LCD. It is a Multi-Mode thickness
gauge that has the ability to measure through painted or coated surfaces
and eliminate the thickness of the paint using a dual element style probe
in echo-echo mode. This instrument can measure with very high
resolution (0.01 mm or 0.001 inches) the thickness of metallic and
non-metallic materials such as steel, aluminum, titanium, plastics,
ceramics, glass and any other good ultrasonic wave conductor. The
DC-3000C/DC-3020C accurately displays readings in either inches or
millimeters.
2. Technical Specifications
Measurement range
T-E : 0.65mm～400.00mm
E-E: 3.00mm～25.00mm
Resolution
0.01mm(0.001〞), 0.1mm (0.01〞)
Velocity range
1000m/s～9999m/s
Measurement rate
4 /s and 10/s in fast mode
Average mode
2 to 9 times average measurement
Limited setting
With Low-high indication and alarm
Measuring Units
mm / inch
Memory (DC-3020C)
Memory of 5,200 readings with location number
Data output
(DC-3020C)
USB to PC
Display
320×240 TFT Color LCD
Battery
2 x AA Batteries
Operating
temperature
-20℃～+50℃
Measuring temp.
-20℃～+350℃(according to the probes)
Dimensions
133mm（L）×75mm（W）×29mm（H）
Weight
0.26kg (including batteries)

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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3. Standard Delivery
-- Main Unit
-- Standard 5MHZ probe D5301
-- 75ML Couplant
-- Build-in calibration block
-- Cable (DC-3020C)
--Carrying case
--Operating manual
--Certificate
4. Overview the Display Unit
1. LCD Screen
2. Key Pad
3. Battery Pack
4. Probe connector
5. Standard Test Block
6. USB connector
2
1
3
4
5
6

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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5. Keypad Functions
Key
Function
- On/ Off Key
- Esc. Menu
Press this key to switch on or off .
Press this Key to Escape the Menu.
- Menu Key
- Confirm Key
Press This Key to enter the Menu.
Press this Key to confirm the selection.
- Return Key
- Storage Key
Press this key to previous menu (DC-3000C)
Press this key to store current data(DC-3020C)
-Contrast
-Adjustment
Press this key to enter menu of Contrast and make
adjustment
- Up arrow Key
Achieve switch among the menu options in the
menu operation
-Down arrow Key
- Calibration Key
Achieve switch among the menu options in the
menu operation.
Put the probe in the air, press this key to complete
the manual calibration. (Under the measurement)

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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- Left arrow key
Achieve switch among the menu options in the
menu operation. (under the measurement)
-Right arrow key
-Shortcut key
Achieve switch among the menu options in the
menu operation(under the measurement)
Resolution setting between mm and inch
6. Display Screen
①Measurement Value
When it is under measurement condition, measurement value is in WHITE
color. When users remove the probe, measurement value is frozen on the
LCD and it is in BLUE color.
②Current Velocity
③Current Probe model
④Gain setting
⑤Battery Life
⑥Resolution
⑦Measurement Mode
⑧Current memory location (DC-3020C)
⑥
⑤
②
①
③
④
⑧
⑦

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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7. Preparation before measurement
【7.1】Preparation of the instrument
For the newly purchased instrument, please check the instrument and its
accessory according to the “3 standard delivery”. If you find it is not the
same as the table listed, please contact the manufacture in time. If the
instrument is damaged, please do not use it and contact the manufacture
as soon as possible.
【7.2】Selection of the Probe
Users can select the suitable probe according to the thickness of the
workpiece to be measured.
Type
Freq.
Meas. rang
Temp.
D 5301
5.0MHz
E-E 3.0～25mm
T-E 1.44～200mm
<60℃
D5008
5.0MHz
0.8～300mm
<60℃
D7006
7.5MHz
0.65～50mm
<60℃
D7004
10.0MHz
0.65～20mm
<60℃
D2012
2.0MHz
2.0～400mm
<60℃
D5113
5.0MHz
2.0～200mm
<350℃
Type
Application
D5301
Used in the thickness measurement through the coating
(E-E)and normal measurement (T-E)
D5008
Used common in many measurements, for example when
the measuring surface is flat or with huge curvature, or the
thickness of the workpiece is large than 50mm.
D5113
Used in the thickness measurement when the temperature
is less than 350℃
D7006
Used in the measurement of thin wall thickness and small
curvature surface.

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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D7004
Used in the measurement of thin wall thickness and small
curvature surface.
D2012
Used in the measurement of coarse particles such as cast
iron.
【7.3】Treatment of the measured surface
When the surface to be measured is too rough or rusty heavily, please
perform the treatment according to the following methods:
1．Clean the measured surface by grinding, polishing or filing, etc. or use
coupling agent with high viscosity for that.
2．Use coupling agents on the workpiece surface to be measured.
3．Take multiple measurements around the same testing point
8. Basic Gauge Operations
【8.1】Switch on
Select the probe and insert it into the probe socket; and then press
to switch on the instrument, the screen displays: the Series No. and the
version number.
If you did not insert the probe before switching on the instrument, the
screen will prompt you that “Plug in the probe”, at this moment insert the
probe into the socket and waiting to go to the measuring status.
Notice: Please use the standard provided probe, otherwise the
instrument will does not work normally and displaying “Error”.
【8.2】Probe Zero
The gauge does an automatic zeroing of the probe thus eliminating the
need for an on-block zero. And then the gauge came into the
measurement mode directly.

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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Notice: Please make sure the probe is not coupled to the test piece when
the gauge is first turned on and that there is no coolant on the end of the
probe. The probe should also be at the room temperature, clean without
any noticeable wear.
【8.3】Contrast
Press to easily enter into the contrast adjustment menu. (Under
the measurement state)
Press or to make fine adjustment
Press or to make rough adjustment
【8.4】Measurement mode
There are 2 measuring modes provided, T-E mode and E-E mode .Users
can select different measuring modes according to their requirements and
measuring environments.
Press into the measurement mode setting
Press or to select desired measurement mode
Press to confirm selection,
Press to Esc. Menu and into the measurement.
8.4.1.1 T-E Mode:
When the T-E mode is selected, all probes are available, and users can
select following measuring modes:
Standard Measurement:

DC-3000C SERIES ULTRASONIC THICKNESS GAUGE
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Display the current value, satisfied with the normal measuring needs.
Minimum Measurement:
Among one measurement, display the point. It is suitable for testing the
curvature surface or needs to get the minimum value which is widely used
in the thickness measurement of pipeline.
Note: it is not recommended to use this function when measuring cast
iron or alloy materials.
Difference mode: (DC-3020C)
Display the accurate differential value between the measured value and
reference value set by the users, suitable for quality check to identifying
the qualified products, whose thickness is in the admissive error.
Average mode: (DC-3020C)
Provides the average value of 2 to 9 measured points and display it
suitable for testing the flat surface.
Limitation setting: (DC-3020C)
Set the upper and lower limit, when the measured thickness exceeds the
preset limit, it will display and give alarm, this measurement mode is more
widely used than differential mode.
Scan:
It is available for measuring the thickness of test piece with high
temperature surface. The gauge will alarm for each fast measurement.
And will display the all measured thickness upon the complete
measurement finished.
8.4.1.2 E-E Mode:
When the E-E mode is selected, only probe D5301 is available. This
function allows you to make measurement between two consecutive back