UNI-T UT343A Coating Thickness Gauge User Manual

UNI-T UT343A Coating Thickness Gauge

 Overview

UT343A is a high-performance coating thickness gauge that can measure coaling thickness on both ferrous and non-ferrous metals. This device has features of high precision, conductive coating measurement, stable and reliable performance and non-destructive measurement, etc. II is a necessary device for automobile manufacturing, sales, evaluation, metal processing, painting, inspection and other industries. II is widely used in manufacturing, metal processing, marine mechanics, bullet trains, quality supervision, and other fields.
The product is based on the principles of electromagnetic induction and eddy current measurement.

The principle of electromagnetic induction measurement is to measure the coating thickness according to the size of the magnetic flux flowing from the sensor through the non-ferrous magnetic coaling into the ferromagnetic substrate. The symbol is Fe. It can measure non-conductive or conductive coatings on magnetically permeable metals such as iron and steel (for example: galvanized steel sheet).
The principle of eddy current measurement is to measure the coating thickness according to the difference in the eddy current formed by an AC magnetic field on a non-magnetic metal substrate (such as aluminum). The symbol is NFe. It can measure non-conductive coatings on non-magnetic metal materials such as aluminum and copper. The substrate must be metal, and the coating cannot conduct electricity.

Features:

1. The measurement method conforms to GB/T 4956 non-magnetic coatings on magnetic substrates-measurement of coating thickness – magnetic method.
2. The measurement method conforms to GB/T 4957 non-conductive coatings on a non-magnetic basis metals-measurement of coating thickness-eddy current.
3. Two thickness measurement methods: magnetic and eddy current
4. Automatic identification of the ferrous or non-ferrous substrates.
5. With a high-precision, hard-wearing and stable sensor.
6. Single and multi-point calibration methods are adopted to correct the sensor systematic error and ensure measurement accuracy.
7. 3-color warning light indicates the current value attribute (green: qualified; red: below the limit; yellow: above the limit).
8. Power on/off and measurement are accompanied by audio indication.
9. The content displayed on the screen can be rotated up and down, which is convenient for users to read the measured values from different angles.
10. The high-capacity memory chip can store 199 groups of data.

Accessories

Open the packing box and take out the gauge. Please double-check whether the following items are missing or damaged.

1. Coating thickness gauge-1 pcs
2. User manual 1 pcs
3. Standard coating thickness sheet 1 set (5 pcs)
4. Ferrous substrate 1 pcs
5. Non-ferrous substrat 1 pcs
6. Sensor protective cover 1 pcs
7. AAA alkaline batterie 2 pcs

Safety Instructions

1. Initialization self-test is needed for the gauge when ii is powered on. When turning on the gauge, please do not put the sensor close to any metal objects (at least 5 cm away from them) and stay away from strong electromagnetic fields, otherwise, the meter will be unusable and need to be restarted under the above-mentioned environment.
2. Please keep the sensor clean and in good condition to avoid dust, oil and other factors affecting the measurement accuracy.
3. Do not use or store the gauge in high temperature, high humidity, flammable, explosive and strong magnetic field environments.
4. Clean the gauge casing with a soft cloth and mild detergent. Do not use abrasives or solvents to avoid damage to the gauge.
5. Do not disassemble or modify the gauge.
6. When the LCD displays the low battery symbol” IC)”, replace the battery in time. Remove the battery if the gauge is not used for a long time.
7. The batteries are normal “AAA” alkaline batteries that cannot be charged.
8. The standard coating thickness sheets are high-precision accessories that are related to the accuracy of the gauge and need to be preserved properly to prevent scratches, corrosion, bending and deformation of the surface.
9. The metal substrates also need to be preserved properly to prevent scratches, rust, oxidation and deformation of the surface.

Function Description

Product Structure

Display Interface

1. View stored data
2. Stored data number
3. Calibration mode
4. Setting mode
5. Continuous measurement
6. Battery status
7. Higher limit
8. Lower limit
9. Ferrous substrate
10. Non-ferrous substrate
11. mil
12. µm
13. Stored data number symbol (rotated)
14. View stored data (rotated)
15. Stored data number (rotated) /MAX/MIN/AVG value
16. Average
17. Minimum
18. Maximum
19. Higher limit (rotated)
20. Lower limit (rotated)
21. Ferrous substrate
22. Non-ferrous substrate (rotated)
23. mil (rotated)
24. Measured value
25. µ m (rotated)
26. Stored data number symbol

Buttons

/AVG)

|

Power on/off

|

Confirm and enter the next page

|
|

View stored data

| Enter setting interface| Adjust the value up/

view the last data

| Constantly adjust the data number forward
| View stored data| Enter calibration mode| Adjust the value down

/view the

next data

| Constantly adjust the data number backward
|

Rotate screen

|

Clear all stored data

| Cancel and return to the measurement interface|

Clear this data

Operating Instructions

Power on/off
Power on: long press the button until the screen is on.
Power off: long press the button until the screen displays “OFF” and then release it.

Normal Measurement

1. Long press the button to turn on the gauge. The gauge displays the initialization process, and enters the normal measurement mode after the initialization is completed.
2. Estimate the coating thickness of the measured object, and select the corresponding or close standard coating thickness sheet to calibrate on the measurement substrate.
3. A substrate with the thickness or material close to the measured object and without coating should be selected as the measurement substrate as far as possible.
4. Please refer to the calibration chapter for the calibration method.
5. When measuring, select 3 to 5 measuring points on the surface of the measured object evenly, measure 5 times for each point, and take the average value of the 5 times as the indicating value of the point.
6. After the indicating values of the 3 to 5 measuring points are measured, the average of the values should be taken as the reference value of the object coating thickness.

Note:

1. Hold the gauge perpendicular to the substrate to be measured, and lightly press the gauge sensor against the substrate for measurement. It is necessary to keep the sensor in close contact with the substrate surface and avoid the measurement error caused by excessive force.
2. When the measured indicating value is greater than 1750um and less than 2000um, the screen displays OL to indicate over range.
3. When the measured indicating value is greater than 2000um, the gauge will not respond.

Menu Settings

Long press the button in the normal measurement mode to enter the menu settings mode. “SET” will show on the LCD, as shown in the figure:

At this time, it is in the interface of setting the measurement unit. Short press the or G button to adjust the unit (um or mil}. Short press the WI button to confirm the setting and enter the next setting item. Short press the button to exit the setting interface and enter the normal measurement interface.
Note: The arrangement order of the setting items is: unit, higher limit, lower limit, probe mode, measurement mode, sound, and factory reset.

Operation of other setting items:

1. Higher Limit
   As shown in the figure below, when the LCD displays “SET” and “HI” symbols, it is in the higher limit setting state. Short press the button to adjust the setting value upward, and short press the button to adjust the setting value downward. Short press the button to confirm and enter the next setting item. Short press the  button to exit.
   When the LCD displays “SET” and “LO” symbols, it is in the lower limit setting state. And its operation is the same as the higher limit setting.
   Note: If an error occurs when setting the lower limit value (for example, the lower limit value is greater than the higher limit value), after short pressing the button, the LCD will display “Err” and return to the higher limit setting interface.

2. Probe Mode
   As shown in the figure below, it is in the probe mode setting state.
   Short press the or button to adjust the probe mode. Short press them button to confirm and enter the next setting item. Short press the j} button to exit.
   The gauge has 3 probe modes:

   • Auto mode (LCD displays “Aul”): In this mode, the type of substrate (ferromagnetic substrate or non-ferromagnetic substrate) of the measured object can be automatically identified. The probe will enter the corresponding operating mode a=rding to the type of substrate. If the substrate of the measured object is a ferromagnetic material substrate, it will automatically enter the magnetic induction operating mode. If the substrate of the measured object is a non-ferromagnetic substrate, it will automatically enter the eddy current operating mode.
   •  NFe mode (LCD displays “NFE”): The probe will enter the eddy current operating mode.
   •  Fe mode (LCD displays “FE”): The probe will enter the magnetic induction operating mode.

3. Measurement Mode ( Turn on/off Continuous Measurement) As shown in the figure below, it is in the measurement mode setting state. Short press the or .J button to turn on/off the continuous measurement mode. Short press the button to confirm and enter the next setting item. Short press the button to exit.

4. Sound
   When the LCD displays “SET” and “SOU” symbols, it is in the sound setting state. Short press the or button to turn on/off the sound. Short press the button to confirm and enter the next setting item. Short press the button to exit.

5. Factory Reset
   When the LCD displays “SET” and “rSt” symbols, it is in the factory reset setting state. Short press the or button to select perform a factory reset or not. Short press the button to confirm and enter the next setting item. Short press the or  button to exit. After selecting “YES” and pressing the  button, the gauge will restore the factory settings. After completion, the LCD will display “dON”, and then automatically return to the normal measurement interface.
   Note:
   After restoring the factory settings, all setting items will be restored to the factory settings (including calibration data), and all the saved test data will be deleted.
   View Saved Data
   In the normal measurement mode, short press the or button to enter the mode of viewing test data, as shown below:
   At this time, the LCD displays the last data of the last measurement: the number is 4, the test value is 107um, ferrous substrate, and the value exceeds the set higher limit. Short press the or button to switch the number of stored data. Long press the button to delete the current data. Short press the button to exit the viewing data mode and return to the normal measurement mode.
   Calibration
   In the normal measurement mode, long press the button to enter the calibration mode, as shown in the figure below:  At this time, the “CAL” symbol flashes. “LFt Up” means that the probe needs to be lifted (away from metal objects and strong electromagnetic fields), and press the button to perform probe compensation. After the compensation is completed, it enters the zero calibration point, and the LCD displays as follows:
   The LCD displays 0.0um, and the calibration number “1” is displayed in the lower right comer. Press the gauge probe on the attached uncoated substrate to perform zero point calibration. The gauge will automatically identify whether it is a ferrous substrate or a non-ferrous substrate.

After completing the zero point calibration, it will automatically enter calibration point 2 (ie the calibration point of 50.0um). Place the 50.0um coating thickness sheet flat on the substrate, press down the gauge probe and keep it stable to perform the calibration of this calibration point. After completion, it will automatically enter the calibration of the next calibration point. In addition to the zero point, the gauge can also perform calibrations of 50.0um, 1 00um, 500um, 1 000um and 1500um. Short press the button to switch the calibration point.
When there is a deviation between the coating thickness sheet and the calibration point (for example, when the calibration point of 50.0um is to be calibrated, there is only a coating thickness sheet of 49.Bum), the calibration point can be adjusted by short pressing the or ]button.

Note:

• A. If only the zero point calibration is performed, after completing the zero point calibration, short press the button to exit.
• B. After completing the calibration, please measure the standard coating thickness sheets a=rding to the normal measurement mode. At this time, the indicating value of the gauge should be within the indicating error range of the nominal value of the standard coating thickness sheet. For example: the nominal value of the standard coating thickness sheet is 50.0um. After calibration, the indicating value of the gauge should be within the range of± (1 +3%H) um. If the indicating value of is out of tolerance, or the users think it is not satisfactory, please recalibrate.
• C. There is no need to calibrate all calibration points except for the zero point. For example, if the thickness of the coating to be tested is estimated to be in the range of 0.0um to 50.0um, only the calibration of 0.0um and 50.0um is required. After completing the calibration, short press the button to exit.
• D. When the zero point calibration is completed and the gauge has identified the substrate, the substrate of the next calibration point will be fixed. For example, when the zero point calibration is completed, the gauge identifies ferrous substrate, and then the next calibration points (such as 50.0um, 100um, 500um, 1000um, and 1500um calibration points) will automatically exclude non-ferrous substrates and only identify ferrous substrates until the calibration is completed or exited.
• E. If the calibration operation is incorrect and the calibration result is inaccurate, please restore the factory settings and recalibrate.

Performance Indexes

Technical Indexes

Function

| I Range| IThickness| ****

Resolution

| ****

Accuracy

| ****

Description

---|---|---|---|---|---

Ferrous and non-ferrous substrates measurement (FE and NFE)

| ****

0

1750µm

| -0

99.9µm

| ****

0.1µm

| ****

±(3%+

1µm)

| ****

1 . Each point needs to be measured 5 times, and the average value of 5 times is taken as the indication value of the point.

2. 1mil=25.4um.

 | ****

1µm

1-00

1750µm

0

68.9miI

| -0

4.99mil

| ****

0.01mil

| ****

±(3%+

0.04mil)

5-.0

68.9mil

| ****

0.1mil

Probe

measuring force

| ****

0.3-1.5 N

| Probe measuring force range
Minimum convex radius of curvature| ****

5mm

|
Minimum concave radius

of curvature

| ****

50mm

|
Minimum

measured area diameter

| ****

20mm

|
Minimum substrate thickness| ****

0.5mm

|
Display| EBTN color screen|
Rotatable

screen

|  | Switch by pressing the button
Unit conversion| ****

µm /mil

| Metric/imperial

unit conversion

---|---|---

LED alarm

| ****

..j

| The LED lights up

in the corresponding color when the value exceeds the set

range for alarm.

Audio alarm

| ****

..j

| When measuring and alarming, there will be corresponding prompt sounds (the buzzer must be turned on).

Limit setting

| ..j| Any limit value

can be set between 0-1750um.

Measurement

method

| Single /co ntinuous|
Statistical

measurement

| ..j| MAX/MIN/AVG
Probe mode| Optional| AUTO/FE/NFE
Data storage| 199 groups|
Auto power off| 5 minutes|
Low battery

indication

| Low battery indication at 2.3V±0.2V| Low battery symbol

” IL) “flashes.

Power| 1.5V AAA”2=3V alkaline batteries|

Current consumption

| ****

Power off: S5µA Operate: S80mA

| LED alarm+ audio alarm (measure current consumption

based on 3.0V power supply)

Operating environment| 0 °C – 40″C,S80%RH|
Storage environment| – 20 °C – 60 °C ,S75%RH|

General Specifications

1. Refresh rate: 0.5s
2. Sensor type: magnetic induction and eddy current composite sensor
3. Impact resistance: can withstand 1 meter drop
4. Power: 1.5V (AAA) alkaline batteries (2 pcs)
5. Product size: 117x53x37mm
6. Weight: about 111g (including batteries)

 Battery Installation and Replacement

Please replace the battery as follows:

UNI-TREND TECHNOLOGY (CHINA) CO., LTD.
No.6, Gong Ye Bei 1st Road,
Songshan Lake National High-Tech Industrial
Development Zone, Dongguan City,
Guangdong Province, China

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