2BQEA-EC-680Bluetooth Coating Thickness Gauge

❶❷❸ User Manual EC-680
Automotive Paint Meter V1.0.2 1. Introduction







This instrument can non-destructively measure the thickness of non- conductive coatings on metal surfaces, as well as the thickness of non- ferritic metal coatings on ferromagnetic metals (such as iron, nickel, and cobalt). Specific applications include measuring the thickness of paint or galvanized coatings on iron, martensitic stainless steel surfaces, as well as the thickness of paint or plastic films on aluminum and copper surfaces.





This instrument is designed for vehicle paint inspection. It can measure paint thickness while simultaneously identifying materials such as iron galvanized and iron powder paste. The device exhibits strong interference resistance and operates normally in complex electromagnetic field environments. 2. Schematic diagram of appearance Display screen Hanging rope hole Button area Probe USB port Key Instructions KeyFunction Up key: Turn page up; Switch options Down key: Turn page down; Switch options Menu key: Open menu; Confirm Back
key:
Go
back
to
the
previous
page
and
delete
the
latest
data Power key: Power on/off; Zero calibration Side button Short press to rotate the screen; long press to switch display styles Side button ﹀ ﹀ U ▲ ﹀ ﹀ U ▲ 3. Precautions 3.1 Battery Installation (1) Insert the battery according to the positive and negative terminal markings inside the battery compartment. (2) After loading the battery, securely fasten the battery cover to prevent it from popping out. (3) When the instrument is not in use for an extended period, please remove the battery and store it properly. 3.2 Others (1) Avoid direct contact with corrosive chemicals. (2) Avoid use in strong magnetic field environments (e.g., near magnets) to prevent probe damage. (3) Strictly prevent strong electric current and static electricity shocks. (4) Some car bodies may be misidentifed as iron-zinc bodies due to i material differences. (5) Ensure the car's paint is clean, as dust and dirt on the paint surface may affect measurement accuracy. 4. Power on/off Power on: Press the power button briefly when the device is off to turn it on. Power off: Hold the power button for more than 3 seconds while the device is on. Note: When powered on, the instrument automatically shuts down after prolonged inactivity (no button press or measurement). 5. Zero calibration During instrument calibration, hold the power and immediately button press the probe end against the surface of the object being measured. As the probe retracts into the instrument, the zero calibration will be triggered. When the display interface shows "Cal. Finish！", lift the instrument off the object surface and release the button. Note: Holding the button for more than 3 seconds will trigger the instrument shutdown if no calibration action is performed. 6. Measurement Steps Step 1. Prepare the test specimen. Step 2. Move the probe end away from the metallic object and turn on the instrument. Step 3.The instrument probe is vertically pressed onto the surface of the object under test. During the process of the probe retracting into the instrument, the instrument automatically identifies the substrate properties and measures the thickness of the coating (plating). To continue the measurement, the probe can be lifted away from the object and then pressed back onto its surface. 7. Display 7.1 Rotate Screen In the measurement interface, short-press the side button, and the screen will rotate 180°. 7.2 Mode On the measurement interface, long-press the side button. When you hear a "beep," release the button to switch the display style. (1) Simple: This is the bold font mode, where measured data will not be saved. (2) General: This mode displays the maximum, minimum, average, and statistical count of data, with a maximum of 99 records. If more than 99 records are recorded, the instrument will automatically update with the latest data and discard the oldest. (3) Chart: Column charts display measurement data in real time, with a maximum of 10 historical measurement sets cached simultaneously. When the number of measurements exceeds 10, subsequent new measurements are automatically replaced by the earliest data using a first-in-first-out rule, and the chart is refreshed accordingly. Note: On the measurement interface for "General" and "Chart", press and hold the Return key to display the "Delete Latest Data?" prompt. Select Yes or No using the Up/Down keys, then confirm with the Menu key. 7.3 Substrate Properties Iron: ferromagnetic metal substrate; Non-iron: non-ferromagnetic metal substrate; Iron-zinc: iron-zinc coated substrate; Iron powder putty: suspected iron powder putty. 8. Function Settings How to access the configuration menu: In the measurement interface, press and hold the menu key to open the menu. Here, you can confgure i the instrument's functions. The instrument will not respond during measurement after entering the confguration menu.i 8.1 Mode Press the menu key to switch between the Simple, General, and Chart. 8.2 Data Storage (shown only when the style is General or
Chart) (1) View Data: Press and hold the up/down keys to browse through the data one by one. You can view up to 99 measurement data points. (2) Delete All Data: Press and hold the menu key to display the "Yes/No" prompt. Select the option using the up/down keys, then confirm with the menu key. to select Yes or No, then press and hold the menu key to confirm. Note: All statistics will be deleted after restoring factory settings. 9.USB data transfer When the display style is set to "General" or "Chart", the pdf report can be directly exported to a computer via a USB data cable. Note: Note: The "General" and "Chart" display formats share and store data uniformly, with all measured data exportable as a single PDF report. 10.
How
to
download
the
mobile
App Scan the QR code below using your mobile browser or the built-in scan function (Apple users can type "xthick" directly in t…

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SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2026/08/13 U.S. Agent Designation SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: 2BQEA-EC-680): Name and company of U.S. agent: GLOCERTS TECHNOLOGY INC Physical U.S. address of agent: 19784 SUNKISSED RIDGE DR RIVERSIDE, CA 92507 United States FRN of U.S. agent: 0036339737 Phone of U.S. agent: (626) 588-8039 Email address of U.S. agent: [email protected] GLOCERTS TECHNOLOGY INC acknowledges their obligation to accept service of process on behalf of SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD with the FRN [0037181252] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. An expiration date for this letter does not exist. Sincerely, Signature Feng Luo Manager SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Signature Huiying Fan Director GLOCERTS TECHNOLOGY INC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

FCC ID:2BQEA-EC-680 External Photos of the EUT FCC ID:2BQEA-EC-680 FCC ID:2BQEA-EC-680

Label and Location Size: L: 3.0cm*W: 2.0cm Label and Location FCC ID : 2BQEA-EC-680

FCC ID:2BQEA-EC-680 Internal Photos of the EUT FCC ID:2BQEA-EC-680 FCC ID:2BQEA-EC-680 FCC ID:2BQEA-EC-680 Antenna

Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn RF Exposure evaluation Report Reference No. ..................... : FCC ID............................................. : CTA26073000302 2BQEA-EC-680 Compiled by ( position+printed name+signature) . : File administrators Zoey Cao Supervised by ( position+printed name+signature) . : Project Engineer Ace Chai Approved by ( position+printed name+signature) . : RF Manager Eric Wang Date of issue .................................... : Aug. 06, 2026 Testing Laboratory Name .............. : Shenzhen CTA Testing Technology Co., Ltd. Address............................................ : Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name ............................ : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address............................................ : 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Standard ........................................... : 47CFR §1.1310 47CFR §2.1093 KDB447498 D01 General RF Exposure Guidance v06 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purpses as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Bluetooth Coating Thickness Gauge Trade Mark ....................................... : N/A Manufacturer .................................... : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Model/Type reference ...................... : EC-680 Listed Models ................................... : EC-680-A, EC-680-B, EC-680-P, EC-680S, EC-680S-A, EC-680S-B, EC-680S-P Rating ............................................... : DC 3V by battery 1.5V*2AAA Result ............................................... : PASS Report No.: CTA26073000302 Page 2 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Bluetooth Coating Thickness Gauge Model /Type : EC-680 Listed Models : EC-680-A, EC-680-B, EC-680-P, EC-680S, EC-680S-A, EC-680S-B, EC-680S-P Model difference : The PCB board, circuit, structure and internal of these models are the same, only model number and colour are different for these models. So the tests were performed on model EC-680 and the test results for the main test model can cover the listed models. Applicant : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address : 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Manufacturer : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address : 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA26073000302 Page 3 of 8 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ............................................................................................................ 4 2 SUMMARY .......................................................................................................................... 5 2.1 General Remarks ..................................................................................................... 5 2.2 Product Description ................................................................................................. 5 2.3 Special Accessories ................................................................................................. 5 2.4 Modifications ............................................................................................................ 5 3 TEST ENVIRONMENT ....................................................................................................... 6 3.1 Address of the test laboratory .................................................................................. 6 3.2 Test Facility .............................................................................................................. 6 3.3 Statement of the measurement uncertainty ............................................................. 6 4 Test limit .............................................................................................................................. 7 4.1 Requirement ............................................................................................................ 7 4.2 Conducted Power Results ....................................................................................... 7 4.3 Manufacturing tolerance .......................................................................................... 7 4.4 Evaluation Result ..................................................................................................... 8 4.5 Simultaneous Transmission for SAR Exclusion ...................................................... 8 5 Conclusion .............…

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Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn FCC PART 15 SUBPART C TEST REPORT FCC PART 15.247 Report Reference No. ...................: FCC ID. ......................................... : CTA26073000301 2BQEA-EC-680 Compiled by ( position+printed name+signature) : File administrators Zoey Cao Supervised by ( position+printed name+signature) : Project Engineer Ace Chai Approved by ( position+printed name+signature) : RF Manager Eric Wang Date of issue ...................................: Aug. 06, 2026 Testing Laboratory Name .............: Shenzhen CTA Testing Technology Co., Ltd. Address ..........................................: Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Applicant’s name...........................: SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address ...........................................: 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Test specification ......................... : Standard ..........................................: FCC Part 15.247 Shenzhen CTA Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTA Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTA Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Equipment description ................ : Bluetooth Coating Thickness Gauge Trade Mark ......................................: N/A Manufacturer ...................................: SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Model/Type reference .....................: EC-680 Listed Models ..................................: EC-680-A, EC-680-B, EC-680-P, EC-680S, EC-680S-A, EC-680S-B, EC-680S-P Modulation ......................................: GFSK Frequency .......................................: From 2402MHz to 2480MHz Ratings ............................................: DC 3V by battery 1.5V*2AAA Result ..............................................: PASS Report No.: CTA26073000301 Page 2 of 35 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn T E S T R E P O R T Equipment under Test : Bluetooth Coating Thickness Gauge Model /Type : EC-680 Listed Models : EC-680-A, EC-680-B, EC-680-P, EC-680S, EC-680S-A, EC-680S-B, EC-680S-P Model difference : The PCB board, circuit, structure and internal of these models are the same, only model number and colour are different for these models. So the tests were performed on model EC-680 and the test results for the main test model can cover the listed models. Applicant : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address : 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Manufacturer : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address : 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: CTA26073000301 Page 3 of 35 Shenzhen CTA Testing Technology Co., Ltd. Room 106, Building 1, Yibaolai Industrial Park, Qiaotou Community, Fuhai Street, Bao’an District, Shenzhen, China Tel:+86-755 2322 5875 E-mail:[email protected] Web:http://www.cta-test.cn Contents 1 TEST STANDARDS ...................................................................................................................................... 4 2 SUMMARY .................................................................................................................................................... 5 2.1 General Remarks .............................................................................................................................. 5 2.2 Product Description* .......................................................................................................................... 5 2.3 Equipment Under Test ....................................................................................................................... 5 2.4 Short description of the Equipment under Test (EUT) ...................................................................... 5 2.5 EUT configuration .............................................................................................................................. 5 2.6 EUT operation mode ......................................................................................................................... 5 2.7 Block Diagram of Test Setup ............................................................................................................. 6 2.8 Related Submittal(s) / Grant (s) ......................................................................................................... 6 2.9 Modifications ...................................................................................................................................... 6 3 TEST ENVIRONMENT ................................................................................................................................. 7 3.1 Address of the test laboratory ........................................................................................…

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1 FCC Appendix RF Test Data for BLE FCC ID : 2BQEA-EC-680 Company : SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD EUT : Bluetooth Coating Thickness Gauge Model Number : EC-680 Report No. : CTA26073000301 Reviewed By : Eric Wang 2 Appendix A: DTS Bandwidth Test Result TestMode Antenna Freq(MHz) DTS BW [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 0.640 2401.692 2402.332 0.5 PASS 2440 0.648 2439.688 2440.336 0.5 PASS 2480 0.648 2479.692 2480.340 0.5 PASS 3 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 4 5 Appendix B: Occupied Channel Bandwidth Test Result TestMode Antenna Freq(MHz) OCB [MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict BLE_1M Ant1 2402 1.0035 2401.5191 2402.5226 --- --- 2440 1.0063 2439.5183 2440.5246 --- --- 2480 1.0097 2479.5188 2480.5285 --- --- 6 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 7 8 Appendix C: Maximum conducted output power Test Result Peak TestMode Antenna Freq(MHz) Conducted Peak Powert[dBm] Conducted Limit[dBm] Verdict BLE_1M Ant1 2402 -0.03 ≤30 PASS 2440 -0.10 ≤30 PASS 2480 -0.30 ≤30 PASS 9 Appendix D: Maximum power spectral density Test Result TestMode Antenna Freq(MHz) Result[dBm/3kHz] Limit[dBm/3kHz] Verdict BLE_1M Ant1 2402 -15.82 ≤8.00 PASS 2440 -15.79 ≤8.00 PASS 2480 -15.91 ≤8.00 PASS 10 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 11 12 Appendix E: Band edge measurements Test Result TestMode Antenna ChName Freq(MHz) RefLevel[dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 Low 2402 -0.65 -52.22 ≤-20.65 PASS High 2480 -0.24 -52.7 ≤-20.24 PASS 13 Test Graphs BLE_1M_Ant1_Low_2402 BLE_1M_Ant1_High_2480 14 Appendix F: Conducted Spurious Emission Test Result TestMode Antenna Freq(MHz) FreqRange [MHz] RefLevel [dBm] Result[dBm] Limit[dBm] Verdict BLE_1M Ant1 2402 Reference -1.45 -1.45 --- PASS 30~1000 -1.45 -69.11 ≤-21.45 PASS 1000~26500 -1.45 -40.11 ≤-21.45 PASS 2440 Reference -1.42 -1.42 --- PASS 30~1000 -1.42 -69.44 ≤-21.42 PASS 1000~26500 -1.42 -40.56 ≤-21.42 PASS 2480 Reference -1.89 -1.89 --- PASS 30~1000 -1.89 -68.68 ≤-21.89 PASS 1000~26500 -1.89 -40.9 ≤-21.89 PASS 15 Test Graphs BLE_1M_Ant1_2402_0~Reference BLE_1M_Ant1_2402_30~1000 BLE_1M_Ant1_2402_1000~26500 16 BLE_1M_Ant1_2440_0~Reference BLE_1M_Ant1_2440_30~1000 17 BLE_1M_Ant1_2440_1000~26500 BLE_1M_Ant1_2480_0~Reference BLE_1M_Ant1_2480_30~1000 18 BLE_1M_Ant1_2480_1000~26500 19 Appendix G: Duty Cycle Test Result TestMode Antenna Freq(MHz) ON Time [ms] Period [ms] X DC [%] xFactor Limit Verdict BLE_1M Ant1 2402 0.41 0.62 0.6613 66.13 1.80 --- --- 2440 0.41 0.62 0.6613 66.13 1.80 --- --- 2480 0.42 0.63 0.6667 66.67 1.76 --- --- 20 Test Graphs BLE_1M_Ant1_2402 BLE_1M_Ant1_2440 BLE_1M_Ant1_2480 21 22 Appendix H: Emissions in Restricted Bands Test Result TestMod e Antenn a ChNam e Freq(MH z) Detector Freq [MHz] Result [dBm] Gain [dB] DC Factor [dB] Result [dBuV/m] Limit [dBuV/m] Verdict BLE_1M Ant1 Low 2402 AV 2310.000 -60.84 2.00 1.80 38.16 ≤54 PASS AV 2377.805 -59.13 2.00 1.80 39.87 ≤54 PASS AV 2390.000 -59.66 2.00 1.80 39.34 ≤54 PASS Peak 2310.000 -52.91 2.00 0.00 44.29 ≤74 PASS Peak 2358.065 -48.78 2.00 0.00 48.42 ≤74 PASS Peak 2390.000 -52.66 2.00 0.00 44.54 ≤74 PASS High 2480 AV 2483.500 -57.97 2.00 1.76 40.99 ≤54 PASS AV 2483.600 -57.59 2.00 1.76 41.37 ≤54 PASS AV 2500.000 -58.84 2.00 1.76 40.12 ≤54 PASS Peak 2483.500 -49.66 2.00 0.00 47.54 ≤74 PASS Peak 2484.400 -44.18 2.00 0.00 53.02 ≤74 PASS Peak 2500.000 -51.88 2.00 0.00 45.32 ≤74 PASS Note： 1. The limit in dBm for average detector is conversion from 54dBuV/m, according to 15.209(a). The limit in dBm for peak detector is 20dB above the limit of average detector in dBm. 23 Test Graphs BLE_1M_Ant1_Low_2402_AV BLE_1M_Ant1_Low_2402_Peak BLE_1M_Ant1_High_2480_AV 24 BLE_1M_Ant1_High_2480_Peak

1. Antenna Description: Antenna type PCB antenna Model EC-680 Frequency range 2400-2500MHz Manufacturer SHENZHEN YOWEXA MEASUREMENT TECHNOLOGY CO.,LTD Address 16th Floor, Building 2, Guangming Phoenix Plaza, Guangming District, Shenzhen, China ANT Peak Gain 0.83 dBi 2. Antenna Photo: 3. Test Equipment & Conditions 3.1 Test instrument VSWR is tested using Agilent E5071B connected to a hand mechanism, and the status is free space. 3.2 Test environment and methods 4．Antenna Radiation Pattern 2400MHz 2450MHz 2500MHz

FCC ID:2BQEA-EC-680 Test Setup Photos of the EUT FCC ID:2BQEA-EC-680