1. Produktet er slutview
The Geloo 85MM RPM Tachometer Gauge is designed to accurately display the rotation speed of an engine. This gauge is suitable for a wide range of applications, including cars, trucks, boats, diesel generator engines, gasoline engines, construction machinery, and agricultural machinery.
Nøglefunktioner:
- Bred kompatibilitet: Works with various tacho RPM sensors and engine types (4, 6, 8, 10, 12 cylinder gas engines, and diesel engines).
- Holdbar konstruktion: Made with a 316 stainless steel bezel, PVC, ABS, and curved glass for long-lasting performance.
- Miljømodstand: Features an IP67 waterproof and dustproof rating, along with anti-fog properties, ensuring clear readings in challenging conditions.
- Multi-Color Backlight: Offers 7 backlight colors (red, green, blue, white, yellow, cyan, purple) with an automatic cycling mode.
- Wide Voltage Område: Operates on 9-32V DC power.

Figur 1: Forside view of the Geloo 85MM RPM Tachometer Gauge.
2. Specifikationer
| Feature | Specifikation |
|---|---|
| Mærke | Geloo |
| Materiale | Glas, rustfrit stål |
| Dimensioner (L x B x H) | 4.88 x 4.76 x 3.11 tommer |
| Varens vægt | 0.55 pund |
| Antal genstande | 1 |
| Operation Voltage | 9-32V DC |
| RPM-rækkevidde | 0-6000 RPM |
| Installationshuldiameter | 85 mm (3 3/8 tommer) |
| Required Backyard Space | 55 mm |
| Vandtæt vurdering | IP67 |

Figur 2: Produktmål til installationsplanlægning.
3. Installation
Proper installation is crucial for the accurate and reliable operation of your tachometer gauge. Follow these steps carefully:
3.1 Montering af måleren
- Forbered panelet: Identify a suitable location on your dashboard or panel. You will need to open a hole with a diameter of 85 mm (3 3/8 tommer).
- Tjek klarering: Sørg for, at der er mindst 55 mm of clear space behind the panel for the gauge body and wiring connections.
- Indsæt og fastgør: Carefully insert the tachometer gauge into the prepared hole. Use the provided mounting ring and nuts to secure the gauge firmly in place.
3.2 Ledningsforbindelser
Connect the wires from the gauge to your vehicle's electrical system as follows:
- Sort ledning: Opret forbindelse til Jord (-).
- Rød ledning: Opret forbindelse til 9-32VDC Power (+).
- Blå ledning: Tilslut til Omdrejningssignal source (e.g., ignition coil, alternator 'W' terminal, or dedicated RPM sensor output).
- Gul ledning: Opret forbindelse til Backlight Power (+). This can be connected to the Red wire for constant backlight or to a switched power source for controlled illumination.

Figure 3: Detailed wiring diagram and speed ratio settings.
3.3 Speed Ratio Settings
The tachometer requires a specific speed ratio setting to accurately display RPM based on your engine type. Refer to the table below to determine the correct setting for your engine:
| Inboard or Gas Engine | Diesel motor | Påhængsmotor | ||
|---|---|---|---|---|
| Cylinder | Hastighedsforhold | Speed Ratio = Gear Number | polakker | Hastighedsforhold |
| 4 | 2 | Speed ratio is determined by the gear number of the diesel engine. | 4 | 2 |
| 6 | 3 | 6 | 3 | |
| 8 | 4 | 8 | 4 | |
| 10 | 5 | 10 | 5 | |
| 12 | 6 | 12 | 6 | |
Note: The speed ratio setting is typically adjusted via a button or switch on the back of the gauge, or through a specific sequence of button presses. Refer to the small instruction sheet included with the product for precise adjustment procedures.

Figur 4: Eksample of the tachometer gauge installed in a boat dashboard.
4. Betjening
Once installed and wired correctly, the tachometer gauge will power on with your vehicle's ignition. The needle will indicate the engine's RPM (Revolutions Per Minute).
4.1 Backlight Color Adjustment
The gauge features multiple backlight colors for enhanced visibility and personalization. To change the backlight color:
- Locate the small button on the back of the gauge.
- Kort tryk the button to cycle through the available colors: Red (default) → Green → Blue → White → Yellow → Cyan → Purple.
- After cycling through all colors, the next press will activate the automatisk tilstand, which automatically switches the backlight color every 1 minute.

Figure 5: Backlight color options and the adjustment button on the rear of the gauge.
4.2 Produktdemonstrationsvideo
Video 1: A demonstration of the Geloo 85MM RPM Tachometer Gauge, including its waterproof capabilities and general appearance.
5. Vedligeholdelse
To ensure the longevity and optimal performance of your Geloo Tachometer Gauge, follow these simple maintenance guidelines:
- Rensning: Brug en blød, damp cloth to clean the gauge face and bezel. Avoid abrasive cleaners or solvents that could damage the materials or finish.
- Miljøbeskyttelse: The gauge is designed with an IP67 vandtæt og støvtæt klassificering. This means it is protected against dust ingress and temporary immersion in water (up to 1 meter for 30 minutes). While durable, avoid prolonged submersion or high-pressure water jets.
- Inspektion: Periodically check the wiring connections for any signs of corrosion or looseness. Ensure the mounting remains secure.

Figure 6: The gauge features IP67 dustproof and waterproof protection.
6. Fejlfinding
If you encounter issues with your tachometer gauge, consider the following troubleshooting steps:
- Unøjagtige omdrejningstalaflæsninger:
- Bekræft, at speed ratio setting is correctly configured for your engine's cylinder count or pole number (refer to Section 3.3). Incorrect settings are a common cause of inaccurate readings.
- Tjek Blue RPM Signal wire connection. Ensure it is securely connected to a reliable RPM signal source and that the signal is clean and consistent.
- No Power or Display:
- Bekræft, at Red (9-32VDC Power) og Sort (jord) wires are correctly and securely connected to a power source within the specified voltage rækkevidde.
- Kontroller, om der er sprunget sikringer i strømkredsløbet.
- Baggrundsbelysning virker ikke eller sidder fast:
- Sørg for Yellow (Backlight) wire er korrekt tilsluttet en strømkilde.
- Try short-pressing the button on the back of the gauge multiple times to cycle through colors and exit any potential automatic mode (refer to Section 4.1).
- Gauge Not Responding:
- Temporarily disconnect and reconnect power to the gauge to perform a soft reset.
- Inspect all wiring for damage, pinches, or loose connections.
7. Garanti og support
Geloo is committed to providing high-quality products. Each tachometer gauge undergoes strict quality inspection before leaving the factory to ensure reliability and performance.
If you have any questions about the product, require assistance with installation, or encounter any issues that cannot be resolved using the troubleshooting guide, please contact Geloo customer support. Provide your product model and a detailed description of the issue to receive prompt assistance.