ELING Tacho RPM Signal Adapter User Manual

1. Product Overview

The ELING Tacho RPM Signal Adapter is designed to convert engine RPM signals into a readable 9V pulse output for various tachometers and RPM gauges. It is available in two models:

• GR01: Specifically designed for all types of gasoline engines. It senses current on the ignition coil positive wire.
• DR01: Compatible with both diesel and gasoline engines. It senses magnet signal changes from the vehicle's original alternator.

Both models provide a fixed output TACH ratio of 4 pulses per round and feature an IP67 waterproof rating and a compact, plug-and-play design.

2. Setup and Installation

2.1 Model GR01 (Gasoline Engine)

2.1.1 Cable Definition

• RED: Power Supply 12V DC
• SHORT BLACK: Power Ground (GND)
• LONG BLACK: Signal Input (Wrap around ignition coil cable)
• BLUE: Output Signal (fixed 4 pulses/round RPM ratio)
• BROWN: Switch Control Cable

2.1.2 Configuration Steps

1. Connect Switch Cable: Connect the short black (ground) and brown (switch control) cables to enter setting mode.
2. Locate Ignition Coil: Find the ignition coil of your gasoline engine, typically close to the spark plug. Refer to your engine/car/vehicle user guide if needed.
3. Wrap Input Signal Cable: Wrap the long black input signal cable 5-8 rounds across the ignition coil cable, then tighten.
4. 

   Figure 1: Ignition Coil Wrapping for GR01
5. Power On: Power on the sensor. The LED will illuminate green.
6. Disconnect Switch Cable: Disconnect the switch cable (black and brown). The LED will remain green, and the sensor will begin calculating the detected pulses from the engine.
7. Connect/Disconnect Brown Cable: Briefly connect and then disconnect the brown switch control cable. The LED will flash, indicating the setting is confirmed.
8. Output Signal: The sensor outputs a pulse signal with a fixed TACH RPM ratio of 4 pulses per round. For example, if the input frequency is 100Hz at 1000RPM, the sensor will convert the signal and output 66.6Hz at 1000RPM.
9. Configure Tachometer: Set your tachometer/RPM gauge's TACH RPM ratio to 4 pulses per round for proper operation.

Figure 2: GR01 Wiring Diagram

Figure 3: GR01 Detailed Configuration Steps

2.2 Model DR01 (Diesel/Gasoline Engine)

2.2.1 Cable Definition

• RED: Power Supply 12V DC
• BLACK: Power Ground (GND)
• YELLOW: Output Signal (fixed 4 pulses/round RPM ratio)
• WHITE: Switch Control Cable

2.2.2 Configuration Steps

1. Connect Switch Cable: Connect the black (ground) and white (switch control) cables to enter setting mode.
2. Mount on Alternator: Find the vehicle's original alternator and mount the DR01 on top of it. Secure the installation.
3. 

   Figure 4: Alternator Mounting for DR01

4. Power On: Power on the sensor. The LED will illuminate green.
5. Disconnect Switch Cable: Disconnect the switch cable (black and white). The LED will remain green, and the sensor will begin calculating the detected pulses from the engine.
6. Connect/Disconnect White Cable: Briefly connect and then disconnect the white switch control cable. The LED will flash, indicating the setting is confirmed.
7. Output Signal: The sensor outputs a pulse signal with a fixed TACH RPM ratio of 4 pulses per round.
8. Configure Tachometer: Set your tachometer/RPM gauge's TACH RPM ratio to 4 pulses per round for proper operation.

Figure 5: DR01 Wiring Diagram

Figure 6: DR01 Detailed Configuration Steps

3. Operating Instructions

Once correctly installed and configured, the ELING Tacho RPM Signal Adapter continuously monitors the engine's RPM signal source (ignition coil for GR01, alternator for DR01) and converts it into a standardized 9V pulse output. This output is then fed to your compatible tachometer or RPM gauge, providing accurate engine speed readings.

• The output signal is a fixed 4 pulses per round. Ensure your tachometer is set to this ratio.
• The device operates automatically once powered and configured.

4. Maintenance

The ELING Tacho RPM Signal Adapter is designed for durability and minimal maintenance. It is IP67 waterproof, protecting it from dust and water ingress.

• Periodically check the wiring connections to ensure they remain secure and free from corrosion.
• Keep the sensor unit clean and free from excessive dirt or debris.
• Avoid exposing the unit to extreme physical shock or temperatures outside its operating range.

5. Troubleshooting

If you encounter issues with your ELING Tacho RPM Signal Adapter, consider the following:

• No RPM Reading:
  - Check all wiring connections (power, ground, signal input, output) for proper contact and polarity.
  - Ensure the sensor is receiving power (LED should be green after initial power-on).
  - Verify that your tachometer is correctly configured to a 4 pulses/round ratio.
  - For GR01, ensure the signal input cable is wrapped 5-8 times around the ignition coil cable.
  - For DR01, ensure the sensor is securely mounted on the alternator.
• Inaccurate RPM Reading:
  - Double-check the tachometer's settings for the correct pulse ratio.
  - Ensure the signal input connection is stable and not interfered with by other electrical components.
• LED Not Illuminating:
  - Check power supply connections and ensure the correct voltage is applied (12VDC for GR01, 9-36VDC for DR01).
  - Inspect for any damage to the power cables or the unit itself.

If problems persist after checking these points, please contact customer support for further assistance.

6. Specifications

7. User Tips

While no specific user tips were available from reviews or Q&A, here are some general recommendations for optimal performance:

• Always ensure a clean and stable power supply to the adapter to prevent erratic readings.
• For GR01, experiment with the number of wraps (within the 5-8 range) around the ignition coil if initial readings are inconsistent.
• For DR01, ensure the mounting location on the alternator is free from excessive vibration or heat.
• When connecting to your tachometer, double-check the tachometer's own manual for specific input requirements and calibration procedures.

8. Warranty and Support

For any technical assistance, troubleshooting beyond this manual, or inquiries regarding product warranty, please contact the seller or manufacturer directly. Keep your purchase records handy when seeking support.