1. Introduction
The mypin DM8A-NB Digital Sensor Meter is a versatile, high-precision instrument designed for measuring current or voltage signals. It features a clear 4-digit LED display for accurate readings and stable performance. This meter supports various input signals including 0-75mV, 4-20mA, and 0-10V, making it compatible with a wide range of sensors such as transmitters, pressure sensors, liquid level sensors, and load cells.
This manual provides essential information for the safe and efficient operation of your DM8A-NB Digital Sensor Meter. Please read it thoroughly before installation and use.
2. Safety Information
- Ensure the power supply matches the specified voltage (110/220V AC) before connecting the device.
- All wiring should be performed by qualified personnel and in accordance with local electrical codes.
- Do not operate the device in environments with excessive moisture, dust, or corrosive gases.
- Disconnect power before performing any maintenance or wiring changes.
- Avoid touching internal components when the device is powered on.
3. Package Contents
Please check the package for the following items:
- 1 x mypin DM8A-NB Universal Sensor Meter
- 2 x Mounting Brackets
- 1 x User Manual (English)
If any items are missing or damaged, please contact your supplier.
4. Specifications
| Feature | Specification |
|---|---|
| Model | DM8A-NB |
| Display | 4-digit LED |
| Input Signal | 4-20mA, 0-10V, 0-75mV |
| Power Supply | 110/220V AC |
| Auxiliary Power Supply | 24V DC |
| Power Consumption | Less than 3W |
| Accuracy | 0.3%F.S ±2dgt |
| Sampling Rate | Up to 10 measurements per second (≤8 times/second for some configurations) |
| Dimensions (L*W*H) | 95 * 85 * 48mm / 3.74 * 3.35 * 1.89in |
| Weight | 241g / 8.51oz |
| Material | ABS |
5. Product Overview
Front Panel
The front panel features a 4-digit LED display for showing measurement values (PV) and output status (OUT), along with control buttons.
Controls:
- SET Button: Used to enter and confirm parameter settings.
- <</RST Button: Used to shift digits during setting or reset the device.
- Up Arrow Button (▲): Used to increase values during setting.
- Down Arrow Button (▼): Used to decrease values during setting.
Rear Panel and Wiring Diagram
The rear panel contains the terminal blocks for power input, auxiliary power, and sensor signal inputs. Refer to the diagram below for correct wiring.
Wiring Terminal Descriptions:
- 1, 2: 220V AC Power Input
- 3, 4: 110V AC Power Input
- 5, 6: 24V DC Auxiliary Power Output (for powering sensors)
- 7: COM (Common terminal for signal inputs)
- 8: mV+ (Positive input for 0-75mV signal)
- 9: mV- (Negative input for 0-75mV signal)
- 10: mA+ (Positive input for 4-20mA signal)
- 11: mA- (Negative input for 4-20mA signal)
- 12: V+ (Positive input for 0-10V signal)
- 13: V- (Negative input for 0-10V signal)
The meter is compatible with various sensors, including transmitters, pressure sensors, liquid level sensors, and load cells.
6. Setup
6.1 Mounting
The DM8A-NB meter is designed for panel mounting. Use the provided brackets to secure the meter into a cutout of appropriate dimensions. Ensure sufficient space for wiring at the rear.
6.2 Electrical Connections
Before making any connections, ensure the main power supply is OFF.
- Power Supply: Connect the appropriate AC power (110V or 220V) to terminals 1 and 2 (for 220V) or 3 and 4 (for 110V). Verify the correct voltage for your region.
- Auxiliary Power (Optional): If your sensor requires 24V DC power, connect its power input to terminals 5 (+) and 6 (-) of the meter.
- Sensor Input: Connect your sensor's signal output to the corresponding input terminals on the meter.
- For 0-75mV input: Connect the positive signal to terminal 8 (mV+) and the negative signal to terminal 9 (mV-).
- For 4-20mA input: Connect the positive current signal to terminal 10 (mA+) and the negative current signal to terminal 11 (mA-).
- For 0-10V input: Connect the positive voltage signal to terminal 12 (V+) and the negative voltage signal to terminal 13 (V-).
- Ensure all connections are secure and properly insulated.
7. Operating Instructions
7.1 Power On
After all connections are made and verified, turn on the main power supply. The 4-digit LED display will illuminate and show the current measurement value (PV).
7.2 Reading Measurements
The primary display shows the Process Value (PV), which is the measured input signal converted to the configured engineering units. The 'OUT' indicator may light up if an output function is active (though this model specifies 'Output: None', it's a common indicator on similar devices).
7.3 Parameter Settings
The 'SET' button is used to access and navigate through the meter's configuration menus. The Up (▲) and Down (▼) arrow buttons are used to adjust values, and the '<</RST' button is used to shift the cursor or reset. Specific parameter settings (e.g., input type selection, scaling, decimal point position) are typically detailed in the full manufacturer's manual. For basic operation, the meter should display readings automatically once the correct input type is configured.
8. User Tips
No specific user tips from reviews or Q&A were available for this product. General advice for digital meters includes:
- Always double-check wiring before applying power to prevent damage to the meter or connected sensors.
- For stable readings, ensure the sensor and meter are in a stable environment, free from excessive vibration or temperature fluctuations.
- If readings appear incorrect, verify the sensor's output specifications match the meter's configured input type.
9. Maintenance
- Cleaning: Use a soft, dry cloth to clean the meter's surface. Do not use abrasive cleaners or solvents.
- Storage: Store the meter in a dry, dust-free environment when not in use.
- Inspection: Periodically check wiring connections for looseness or corrosion.
10. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on | No power supply; incorrect voltage; loose wiring | Check power connections (110V/220V AC); ensure correct voltage is applied; verify wiring to terminals 1-4. |
| No reading or incorrect reading | Incorrect sensor wiring; wrong input type selected (if configurable); faulty sensor; sensor out of range | Verify sensor wiring to terminals 7-13; check meter settings for correct input type (mV, mA, V); test sensor independently; ensure sensor output is within meter's input range. |
| Unstable readings | Electrical noise; loose connections; faulty sensor | Ensure proper grounding; check all wiring connections; isolate meter from sources of electrical interference; test with a known good sensor. |
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.
