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DM40 Multimeter User Manual
User
Touchable Multimeter 3-IN-1
Manual
Revision History
Version
Date
V1.0
2024/12/07
V1.1
2024/12/11
V1.2
2024/12/13
V1.3
2024/12/25
V1.4
2025/01/18
First release
Added firmware upgrade, custom boot logo, quick screenshot instructions
Added multimeter measurement settings instructions, added AUTO+ mode
Added data record, resistor mode settings, shockproof mode, slide to shutdown
Added mode memory, quick mode switch of resistor, countdown shutdown
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User Manual
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Table of Contents
Summary of Contents for AlienTek DM40
- Page 1 DM40 Multimeter User Manual User Touchable Multimeter 3-IN-1 Manual User Manual Revision History Version Date Modify Contents V1.0 2024/12/07 First release V1.1 2024/12/11 Added firmware upgrade, custom boot logo, quick screenshot instructions V1.2 2024/12/13 Added multimeter measurement settings instructions, added AUTO+ mode V1.3...
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Page 2: Table Of Contents
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 Contents Safety Instructions (Must Read) ..................1 1，Product Introduction ..................1 2，Quick Start ......................4 2.1 Appearance Description ....................4 2.2 Multimeter Measurement Interface ................5 2.2.3，Value of measurement ..................5 2.2.4，Mode Setting Buttons ..................6 2.2.5，Data Recording .................... -
Page 3: Safety Instructions (Must Read)
Safety Instructions (Must Read) 1， Before using DM40, please check carefully if the shell has cracks or defects, and ensure the measurement ports and accessories are normal. 2， DM40 integrates a rechargeable battery. For safety and measurement stability,... - Page 4 Battery Life ≈10H(Oscilloscope) Dimensions 140 * 83 * 25mm Weight ≈260g Interface USB TypeC/MCX Socket/Banana Jack Socket Conditions Temperature 0~40℃、Humidity <75% Table 1.0 DM40 Basic information DM40 Multimeter Technical Parameters: Multimeter Technical Parameters Model DM40A DM40B DM40C Function Range Accuracy...
- Page 5 OFF /Min/1S/∞ /div(X1) Resolution 10bit Math FFT/ABS Coupling AC、DC Measurement items 20 types Table 1.2 Oscilloscope Technical Parameters DM40 Signal Generator Technical Parameters: Signal generator Technical Parameters Sawtooth Triangle Wave out Sine Wave Square Wave Wave Wave Frequency 1Hz~50KHz 100KHz~10MHz Amplitude 0.5V~3.0Vpp...
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Page 6: 2，Quick Start
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 2，Quick Start 2.1 Appearance Description ② ③ ④ ⑤ ⑥ ① ⑦ ⑧ ⑨ 图 2.1.1 DM40 外观和接口 Description ① Power Button (Long press to turn on/off, double-click to lock/unlock touch) ② TypeC Port (For charging and USB communication, input voltage <5.2V) ③... -
Page 7: Multimeter Measurement Interface
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 2.2 Multimeter Measurement Interface The multimeter interface displays rich content: top status bar; left 4 multi-function touch buttons; middle for various measurement displays; bottom 6 touch buttons to switch 8 measurement functions; as shown in Figure 2.2.1. -
Page 8: Mode Setting Buttons
Frequency/Temperature Measurement: Cycle through frequency and temperature measurement. Note: Switching measurement modes restores AUTO/AUTO+ range and turns off RLE function. 2.2.5，Data Recording DM40 supports screen data recording. In non-OL state, short-press the main display number area to record and update data once. -
Page 9: Measurement Port Description
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 Capacitance Capacitance Measurement nF/uF/mF Measurement Diode Diode Voltage Drop Measurement Measurement Resistance Measurement Ω Continuity Measurement Continuity Ω Measurement Resistance Measurement Frequency Measurement Hz/KHz/MHz Frequency Measurement Duty Measurement Temperature Temperature Measurement ℃/℉ Measurement Table 2.3.1 Measurement Mode Description... -
Page 10: Resistance Measurement
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 ③ Connect the probes to the circuit under test and observe the measured value on the screen. OL indicates out of range. Note: Do not exceed the maximum measure value(10A). Use auto range if unsure of the current range. -
Page 11: Measurement Settings
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 2.6 Measurement Settings 2.6.1 Voltage and Current Measurement Settings Taking DM40C voltage measurement setting as an example: Click the voltage V measurement button to enter voltage measurement mode, then Click the MF button to enter the settings interface (similar for current measurement settings). -
Page 12: 3，Oscilloscope & Signal Generator Usage Instructions
Click the resistance measurement button to quickly cycle through offline and online modes. Online mode is indicated by Ω with subscript 3， Oscilloscope & Signal Generator Usage Instructions Please refer to the document: DM40 Oscilloscope & Signal Generator Manual.pdf 用户手册 www.alientek.com... -
Page 13: 4，Other Functions
Table 4.1 System settings 4.2 Firmware Update Instructions System settings Others, select USB connection, connect DM40 to a computer via USB cable. The computer will pop up a U-disk. Open the U-disk, place the latest firmware (dm40xxx.bin), eject the U-disk after transfer is complete. Then long-press the power button to restart and update the firmware automatically. -
Page 14: Shockproof Mode Instructions
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 4.4 Shockproof Mode Instructions mV voltage measurement, resistance measurement, diode and continuity measurement, etc., require magnetic latching relays. Advantages of magnetic latching relays is low power consumption. The disadvantages are high cost, lack of drop resistance, and strong shaking that may cause erroneous measurements, especially for diode and on-off measurements. -
Page 15: Mode Memory Instructions
DM40 Multimeter User Manual Touchable Multimeter 3-IN-1 4.6 Mode Memory Instructions System settingOthers，enable mode memory function will remember the last measurement mode and automatically switch to it after restarting. Users can choose whether to enable this function based on actual needs.
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