Mastfuyi FY12DMM Thermal Imager Multimeter User Manual

1. Introduction

The Mastfuyi FY12DMM is a versatile 2-in-1 device combining a high-resolution thermal imager with a comprehensive digital multimeter. This instrument is designed for professionals and enthusiasts requiring precise measurements and visual thermal analysis in various fields, including electrical, mechanical, construction, and automotive diagnostics. This manual provides essential information for safe and effective operation.

2. Safety Information

Always adhere to the following safety precautions to prevent personal injury or damage to the device.

Read and understand all instructions before use.
Do not operate the device if it appears damaged or is not functioning correctly.
Ensure proper test lead connection before taking any measurements.
Do not exceed the maximum input ratings for any function.
Use caution when working with live electrical circuits.
Keep the device dry and clean.
Only use accessories and replacement parts specified by the manufacturer.

3. Package Contents

Verify that all items are present in the package:

1 x Mastfuyi FY12DMM Thermal Imager Multimeter
1 x Charging Cable (USB Type-C)
1 x Carrying Case
1 x User Manual (this document)
Test Leads (Red and Black)

Note: The flexible AC current clamp is not included in the standard package.

Mastfuyi FY12DMM Thermal Imager Multimeter and accessories — **Figure 3.1:** Mastfuyi FY12DMM Thermal Imager Multimeter with included accessories, including test leads, charging cable, and carrying case.

4. Device Overview

The Mastfuyi FY12DMM integrates thermal imaging and digital multimeter functionalities into a single, portable unit. Its design focuses on ease of use and comprehensive diagnostic capabilities.

Mastfuyi FY12DMM highlighting 2-in-1 functionality, touchscreen, and battery — **Figure 4.1:** The Mastfuyi FY12DMM showcasing its dual functionality, 3.98-inch touchscreen, and internal battery.

Key components include:

3.98-inch TFT LCD Touch Screen: A full-view display for clear visualization of thermal images, multimeter readings, and intuitive menu navigation.
Thermal Imager Lens: The optical component responsible for capturing infrared radiation.
Multimeter Input Jacks: Standard ports for connecting test leads for electrical measurements.
Power Button: Controls the device's power state.
Navigation Wheel/Buttons: Provides alternative control for menu selection and parameter adjustments.
USB Type-C Port: Used for charging the internal battery and transferring data to a computer.

Infographic summarizing Mastfuyi FY12DMM features: 15 color palettes, 7 languages, 320x320 pixels, 3.98 inches screen, 4GB storage, -20 to 550 degrees Celsius, 2500mAh battery, computer mapping — **Figure 4.2:** A summary of the Mastfuyi FY12DMM's core features, including its thermal resolution, screen size, storage, temperature range, battery capacity, and multi-language support.

5. Setup

5.1 Initial Charging

Before first use, fully charge the device.

Connect the supplied USB Type-C charging cable to the device's charging port.
Connect the other end of the cable to a standard USB power adapter (not included) or a computer USB port.
The charging indicator will illuminate. Allow the device to charge until the indicator shows a full charge.

Mastfuyi FY12DMM connected to a USB-C charger — **Figure 5.1:** The Mastfuyi FY12DMM being charged via its USB Type-C port, illustrating the built-in 3.7V 2500mAh lithium battery.

5.2 Power On/Off

To power on: Press and hold the power button until the screen illuminates.
To power off: Press and hold the power button until the shutdown prompt appears, then confirm.

6. Operating the Thermal Imager

6.1 Basic Thermal Imaging

Upon powering on, the device typically defaults to thermal imaging mode, displaying a real-time thermal image with temperature readings.

Temperature Range: Measures temperatures from -20℃ to 550℃ (-4℉ to 1022℉).
IR Resolution: Features a 320 x 320 pixel infrared resolution for clear and detailed thermal images.
Refresh Rate: Operates at 25Hz, providing a smooth, real-time thermal video feed.
Thermal Sensitivity (NETD): With a sensitivity of less than 60mk, the device can detect subtle temperature differences.

The device can perform microscopic detection at a component level, though a macro lens is not included as a standard accessory. If detailed close-up thermal imaging is required, a corresponding macro lens package would need to be acquired separately.

Mastfuyi FY12DMM performing microscopic detection on a circuit board, with a note that macro lens is not standard — **Figure 6.1:** The FY12DMM demonstrating its capability for microscopic thermal detection. Note that a macro lens is an optional accessory.

6.2 Thermal Palettes

The device offers 15 distinct thermal palettes to enhance the visualization of temperature differences. Selecting the appropriate palette can significantly improve the clarity of thermal patterns for specific applications.

Access palette options via the touchscreen menu or navigation controls.
Experiment with palettes like Iron Red, Rainbow, White Hot, and Black Hot to find the most suitable display for your inspection.

6.3 Emissivity Adjustment

Accurate temperature measurements depend on correct emissivity settings. The emissivity value (adjustable from 0.01 to 1.0) should match the material surface being measured.

Locate the emissivity setting in the thermal imaging menu.
Consult standard emissivity tables for common materials or adjust the value to achieve the most accurate readings for your specific target.

6.4 High and Low Temperature Alarm

The intelligent alarm function allows you to set custom temperature thresholds. The device will trigger immediate audible and visual alerts if temperatures exceed or fall below these predefined safety ranges.

Access the alarm settings through the thermal imaging interface.
Configure the upper and lower temperature limits to suit your monitoring requirements.

7. Operating the Multimeter

The FY12DMM includes a 20,000-count digital multimeter for precise electrical measurements.

7.1 Connecting Test Leads

Insert the red test lead into the "VΩmA" input jack.
Insert the black test lead into the "COM" (common) input jack.
For AC current measurements with an optional clamp, refer to the clamp's instructions.

7.2 Measurement Functions

Use the touchscreen or navigation to select the desired measurement function. The device supports auto-ranging for most functions.

DC Voltage: Up to 1000V.
AC Voltage: Up to 750V.
Resistance: Up to 200MΩ.
Capacitance: Up to 99.999mF.
Diode Test: Checks diode functionality.
Continuity Test: Audible indication for continuity.
Flexible AC Current: Up to 2000A (requires optional clamp).
Temperature: -20℃ to 1300℃ (-4℉ to 2372℉) using a K-type thermocouple (not included).

The device features a Hold function to freeze the current reading and Range measurement modes for manual range selection if desired.

8. Data Management

8.1 Image Storage

The FY12DMM has a built-in memory card capable of storing up to 30,000 images in BMP format.

To save a thermal image, press the designated capture button on the screen.
Images are automatically saved to the internal memory.

Mastfuyi FY12DMM connected to a laptop via USB, showing image analysis — **Figure 8.1:** The Mastfuyi FY12DMM connected to a computer, demonstrating the ability to export and analyze stored BMP images from its built-in 4GB memory card.

8.2 Exporting Data

Stored images and recorded waveform data can be exported to a computer for further analysis.

Connect the device to a computer using the USB Type-C cable.
The device should appear as a removable storage device.
Copy the desired BMP image files or data logs to your computer.

9. Maintenance

9.1 Cleaning

Wipe the device exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Gently clean the thermal imager lens with a lens cleaning cloth.
Ensure the device is powered off and disconnected from any power source before cleaning.

9.2 Battery Care

Recharge the battery regularly, even if the device is not in frequent use, to maintain battery health.
Avoid storing the device in extreme temperatures.

10. Troubleshooting

Problem	Possible Cause	Solution
Device does not power on.	Low or depleted battery.	Charge the device fully using the supplied USB Type-C cable.
Inaccurate temperature readings.	Incorrect emissivity setting; dirty lens.	Adjust emissivity for the target material; clean the thermal imager lens.
Multimeter readings are unstable or incorrect.	Poor test lead connection; incorrect function selected.	Ensure test leads are securely connected; verify the correct measurement function is selected.
Cannot transfer data to computer.	Faulty USB cable; incorrect connection mode.	Try a different USB Type-C cable; ensure the device is properly connected and recognized by the computer.

11. Specifications

11.1 Infrared Camera Specifications

Feature	Specification
Display Size	3.98 Inch TFT LCD
IR Resolution	320 x 320 pixels
Screen Resolution	320 x 480 pixels
Angle of View (FOV)	50.0°(H) x 50.0°(V) / 72.1°(D)
Spatial Resolution (IFOV)	8.89mrad
Temperature Range	-20℃ to 550℃ (-4℉ to 1022℉)
Thermal Sensitivity/NETD	Less than 60mk
Refresh Rate	25Hz
Distance Settings	0.3 - 3 meters
Emissivity	0.01 - 1.0 (adjustable)
Thermal Palettes	15
Number of Storage Images	19,000 (internal memory)

Table of Mastfuyi FY12DMM thermal imaging parameters — **Figure 11.1:** Detailed thermal imaging parameters for the Mastfuyi FY12DMM.

11.2 Digital Multimeter Specifications

Feature	Range	Resolution	Accuracy
MAX Display	20000 counts
DC Voltage	20mV/200mV/2V/20V/200V/1000V	0.001mV to 0.1V	±(0.05%+3) to ±(0.5%+3)
AC Voltage	20mV/200mV/2V/20V/200V/750V	0.001mV to 0.1V	±(0.1%+3) to ±(0.5%+3)
Flexible AC Current	200A/2000A	0.1A/1A	±(1.0%+5)
Resistance	200Ω to 200MΩ	0.01Ω to 0.01MΩ	±(0.2%+3) to ±(5%+5)
Capacitance	999.99nF to 99.999mF	0.01nF to 0.001mF	±(2%+5) to ±(5%+20)
Temperature	-20℃~1300℃/-4℉-2372℉	1℃/1℉	±(2%+5)
Diode	Yes
Continuity	Yes

Table of Mastfuyi FY12DMM multimeter parameters — **Figure 11.2:** Detailed multimeter parameters for the Mastfuyi FY12DMM.

11.3 General Specifications

Power: 2500mAh rechargeable battery (built-in)
Size: 169 x 81 x 26.8 mm
Weight: 270g
Operating System Languages: English, Spanish, German, French, Italian, Japanese, Chinese (selectable)

Mastfuyi FY12DMM displaying language selection menu — **Figure 11.3:** The Mastfuyi FY12DMM's language selection menu, showing support for 7 languages.

12. Warranty and Support

For warranty information and technical support, please refer to the warranty card included with your product or visit the official Mastfuyi website.

Visit the Mastfuyi Store on Amazon for more products and support resources.

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