1. Introduction
The ANENG DM850 is a compact, pocket-sized digital multimeter designed for a wide range of electrical measurements. It is capable of measuring AC and DC voltage, DC current, resistance, and diode functionality. Additionally, it offers temperature measurement, an audible continuity test function, and can be used as a single generator. This instrument features full-range overload protection and a low battery indication, making it an ideal tool for laboratories, workshops, DIY enthusiasts, and various home applications.
2. Product Overview
The ANENG DM850 is a portable, high-precision digital display multimeter. Below are its key components and features:
- Low Battery Symbol: Indicates when the battery needs replacement.
- LCD Screen: Digital display for measurement readings.
- Triode Socket: For testing transistors (NPN/PNP).
- Data Hold Button: Freezes the current reading on the display.
- Detection Indicator Light: Illuminates during certain tests, such as continuity.
- Function Dial: Rotary switch to select measurement modes (AC/DC Voltage, Current, Resistance, Diode, etc.).
- Positive Current Jack (10A): Input for high DC current measurements.
- Negative Black Test Lead Socket (COM): Common ground connection for all measurements.
- Positive Red Test Lead Socket (VΩmA): Input for voltage, resistance, and low current measurements.
- Circuit Board: Internal electronics of the multimeter.
- 45 Degrees Height Adjustable: The built-in stand allows for comfortable viewing.
- Extendable Support Frame: Provides stability and ease of operation.
Watch the product demonstration video for a visual guide to its features and usage:
3. Setup
3.1 Battery Installation
The ANENG DM850 requires a 9V battery (6F22 type) for operation. The battery is not always included in the package.
- Locate the battery compartment on the back of the multimeter.
- Use a screwdriver to unscrew the battery compartment cover.
- Insert a 9V battery, ensuring the positive (+) and negative (-) terminals are correctly aligned.
- Replace the battery compartment cover and secure it with the screw.
WARNING: To avoid electrical shock, always remove test leads from the circuit before opening the battery compartment.
4. Operating Instructions
General Safety Precaution: Always ensure the multimeter is set to the correct function and range before making any measurements. Verify test leads are in good condition and properly connected. Do not exceed the maximum input values for any range.
4.1 AC Voltage Measurement
- Turn the function dial to the AC voltage range (V~).
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Carefully insert the tips of the probes into the AC outlet or across the AC source to measure the voltage.
- Read the voltage value on the LCD screen.
4.2 DC Voltage Measurement
- Turn the function dial to the DC voltage range (V=).
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Connect the red probe to the positive (+) side and the black probe to the negative (-) side of the DC source.
- Read the voltage value on the LCD screen.
4.3 Diode Measurement
- Turn the function dial to the Diode position (diode symbol).
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Connect the red probe to the anode and the black probe to the cathode of the diode. The display will show the forward voltage drop.
- Reverse the probes. For a healthy diode, the display should show 'OL' (Open Line) in reverse bias.
4.4 On-Off Beep Detection (Continuity)
- Turn the function dial to the continuity position (with beep symbol).
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Touch the test probes together; a beep indicates continuity.
- Place the probes across the circuit or component to test for continuity. A beep and an illuminated LED light indicate a connected circuit.
4.5 Resistance Measurement
- Turn the function dial to the Resistance range (Ω).
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Connect the test probes across the component to measure its resistance.
- Read the resistance value on the LCD screen.
WARNING: Ensure the component is de-energized before measuring resistance.
4.6 Triode Measurement (hFE)
- Turn the function dial to the hFE position.
- Insert the transistor leads (Emitter, Base, Collector) into the corresponding holes in the triode socket.
- The display will show the hFE value, indicating if the transistor is PNP or NPN type.
4.7 DC Current Measurement
WARNING: Do NOT directly contact current like measuring voltage. Direct contact will burn out the instrument! Always connect the multimeter in series to the circuit.
- Turn the function dial to the appropriate DC Current range (A=, mA, or uA).
- For higher currents (up to 10A), insert the red test probe into the 10A jack. For lower currents (mA/uA), insert the red test probe into the VΩmA jack. The black test probe always goes into the COM jack.
- Open the circuit where you want to measure current and connect the multimeter in series.
- Read the current value on the LCD screen.
4.8 1.5V Current Measurement (Battery Detection)
- Turn the function dial to the 1.5V mA position.
- Insert the red test probe into the VΩmA jack and the black test probe into the COM jack.
- Connect the probes to the battery terminals (red to positive, black to negative).
- The display will show the current, which can indicate the battery's charge status (e.g., current not less than 3.8mA when the battery is charged).
4.9 Data Hold
- During any measurement, press the 'HOLD' button.
- The current reading on the display will freeze, allowing for easy recording.
- Press the 'HOLD' button again to release the data hold and resume live measurements.
5. Specifications
| Function | Range | Resolution | Accuracy |
|---|---|---|---|
| DC Voltage | 200mV | 100µV | ±(2% of rdg+3D) |
| 2000mV/20V/200V | 1mV~100mV | ±(2% of rdg+5D) | |
| 600V | 1V | ±(2.5% of rdg+5D) | |
| AC Voltage | 200V/600V | 100mV~1V | ±(2% of rdg+10D) |
| DC Current | 200µA/2000µA/20mA | 100nA~10µA | ±(2% of rdg+2D) |
| 200mA | 100µA | ±(2.5% of rdg+2D) | |
| 10A | 10mA | ±(2.5% of rdg+10D) | |
| Resistance | 200Ω | 100mΩ | ±(2.5% of rdg+10D) |
| 2000Ω/20kΩ/200kΩ/2000kΩ | 1Ω~1kΩ | ±(2.5% of rdg+4D) | |
| Frequency Range | 45Hz~450Hz | ||
| Audible Continuity Test | Yes | ON-OFF Beep | √ |
| Diode | √ | √ | |
| Triode | √ | mA 1.5V battery | √ |
| Low Battery | √ | Power symbol | Yes |
| Max Count | 1999 Counts | Data Retention | Yes |
| Battery Model | 6F22 9V | ||
| Auto Shutdown | 15 minutes no operation | ||
| Pen Material | PVC/Brass | Pen Length | 70cm/27.5in |
| Overload Protection | 15 second | ||
| Dimensions | 139*74.5*33.6MM | ||
| Operating Mode | Auto Range | ||
| Operating Temperature | 0 - 40 ℃ | ||
| DIY Supplies | Electrical | ||
| Certification | CE | ||
| Origin | Mainland China |
Note: The above parameters are for reference only, and the actual measurement of the specific equipment shall prevail.
6. Maintenance
- Cleaning: Keep the multimeter clean and dry. Wipe the casing with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, remove the battery to prevent leakage. Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace the 9V battery promptly when the low battery indicator appears on the LCD screen to ensure accurate measurements.
- Test Leads: Regularly inspect the test leads for any signs of damage, such as cracks in the insulation or exposed wires. Replace damaged leads immediately.
7. Troubleshooting
- Multimeter not powering on or displaying readings:
- Ensure the 9V battery is correctly installed and has sufficient charge. Replace if necessary.
- Check that the function dial is set to an active measurement range and not 'OFF'.
- Incorrect or unstable readings:
- Verify that the test leads are securely connected to both the multimeter and the circuit under test.
- Ensure the function dial is set to the appropriate measurement type and range for the value being measured.
- Check for external interference or poor contact with the circuit.
- No sound during continuity test:
- Confirm the function dial is set to the continuity position (with beep symbol).
- Check if the test leads are properly connected and not damaged.
- Multimeter burned out during current measurement:
- This typically occurs if the multimeter was connected in parallel (like voltage measurement) instead of in series for current measurement. Always connect in series.
- Ensure the correct current range and input jack (10A or VΩmA) were selected for the expected current.
8. User Tips
- The continuity test feature is noted by users as being instant and responsive, which is helpful for quick circuit checks.
- It is recommended to have a spare 9V battery on hand, as the multimeter does not always come with one, and it's essential for operation.
- The device is generally praised for its good performance and value for money.
9. Warranty & Support
For any after-sales questions, quality issues, replacement or refund requests, or if the product is not operating properly, please contact ANENG customer service directly. This brand product is a technical instrument that requires a certain degree of electrical knowledge for safe and proper use. Always pay attention to the correct operating procedures and usage methods to avoid damage to the product or personal injury.
If you have any problems during the use of the product, please provide a detailed video of the product not operating normally to ANENG customer service. Their experts and technicians can quickly find out the product problem and provide you with a solution.
