DIGITEN 4-Digit Green LED Tachometer RPM Speed Meter Instruction Manual

1. บทนำ

This manual provides detailed instructions for the installation, operation, and maintenance of your DIGITEN 4-Digit Green LED Tachometer RPM Speed Meter. This device is designed to measure rotational speed (RPM) using a Hall proximity switch and magnet sensor, suitable for applications such as lathes, CNC machines, and conveyor belts.

2. เนื้อหาบรรจุภัณฑ์

• Tachometer x 1
• Hall NPN proximity sensor x 1
• แม่เหล็กx1

Image: Contents of the DIGITEN Tachometer package, including the display unit, Hall sensor, and magnet.

3. ข้อมูลจำเพาะ

Image: Detailed dimensions of the tachometer display unit, showing length (72mm) and height (36mm).

4. การตั้งค่าและการติดตั้ง

4.1 Mounting the Tachometer Display

The tachometer display unit requires a panel cutout for flush mounting. Ensure the cutout dimensions match the specified 68x33mm. Secure the display unit into the panel.

4.2 Mounting the Hall Proximity Sensor and Magnet

1. Mount the Hall NPN proximity sensor in a fixed position near the rotating part (e.g., shaft, pulley) whose RPM is to be measured.
2. Attach the magnet to the rotating part. Ensure the magnet is securely fixed to prevent detachment during operation.
3. Position the sensor so that the magnet passes within its detection range of 2-3mm (0.07"-0.12") during rotation.
4. Verify the magnet's orientation. The direction of the magnet relative to the sensor is crucial for proper detection. If the tachometer does not register RPM, try flipping the magnet's orientation.

Image: The Hall proximity sensor, showing its M12mm cylindrical form factor and the attached cable.

5. แผนภาพการเดินสายไฟ

Carefully follow the wiring instructions below to connect the tachometer display to the Hall sensor and power supply. Incorrect wiring can damage the device.

5.1 Hall NPN Proximity Sensor Wiring

• ลวดสีน้ำตาล: Connect to Power + (DC positive)
• สายสีน้ำเงิน: Connect to Power - (DC negative / Ground)
• สายสีดำ: Connect to Signal output

5.2 Tachometer Display Wiring

• สายสีแดง: Connect to DC + (Power positive, 8-15V DC)
• สายสีดำ: Connect to GND (Ground / Power negative)
• สายสีเหลือง: Connect to IN+ (Signal input from the sensor's black wire)

Ensure all connections are secure and correctly matched before applying power.

Image: Detailed wiring diagram showing connections between the tachometer display, Hall sensor, and DC power source.

6. การดำเนินการ

Once the tachometer is correctly installed and wired, apply DC power (8-15V). The green LED display will illuminate. As the magnet attached to the rotating part passes the Hall sensor, the tachometer will detect the pulses and display the corresponding RPM value.

• The display will automatically clear to zero after approximately 10 seconds if no pulses are detected. For higher RPM values, the clear zero time may be slightly longer.
• The refresh frequency of the display varies with RPM, providing a responsive reading across the measurement range.

7. การแก้ไขปัญหาและคำแนะนำ

• No RPM Reading or Incorrect Reading:
  1. Confirm all wires are connected correctly according to the wiring diagram.
  2. Check the direction of the magnet. If the reading is incorrect or absent, try flipping the magnet.
  3. Ensure the distance between the magnet and the sensor is within the optimal range of 2-3mm (0.07"-0.12").
  4. ตรวจสอบปริมาณแหล่งจ่ายไฟtage is within the specified DC 8-15V range.
• Display Not Illuminating:
  1. Check power connections to the tachometer display (Red to DC+, Black to GND).
  2. ตรวจสอบให้แน่ใจว่าแหล่งจ่ายไฟทำงานถูกต้อง
• การอ่านเป็นระยะ:
  1. Re-check the sensor-to-magnet distance. Vibrations or misalignment can cause inconsistent readings.
  2. Ensure the magnet is securely attached and not moving relative to the rotating part.

8. การรับประกันและการสนับสนุน

DIGITEN provides a one-year warranty term for any product issues. If you encounter any problems or have questions regarding your tachometer, please contact DIGITEN customer support. Refer to the product packaging or purchase documentation for contact details.