Runleader Digital Tach Hour Meter with Engine Temperature Gauge

1. Product Overview

The Runleader Digital Tach Hour Meter with Engine Temperature Gauge (Model RL-HM035A-TS003) is a versatile instrument designed to monitor key performance metrics for gas engines. It provides real-time RPM, total and job hours, engine temperature, and includes customizable alerts for RPM and temperature thresholds, as well as service reminders. This device is self-powered and features a replaceable battery and a backlit display for visibility in various conditions.

Figure 1: Runleader Digital Tach Hour Meter (RL-HM035A-TS003) with included temperature sensor.

2. Key Features

• Hours Tracking: Monitors total run time (TOT) and single working hours (JOB). Allows programming of previous hours (INT) for replacement units and includes service interval reminders (SVC) from 5 to 1000 hours.
• RPM Monitoring: Displays real-time RPM (0-25000 RPM) with adjustable engine firing patterns. Features an alert channel for exceeding set RPM limits (100-25000 RPM) and records the highest RPM achieved since engine start.
• Temperature Gauge: Tracks current and maximum engine heat sink temperature using the TS002 probe sensor. Provides temperature exceed reminders (-20°C to +300°C / -4°F to +572°F) and allows switching between Celsius and Fahrenheit.
• Backlight Display: Default green backlight for low-light conditions. Configurable backlight modes: always-on, off, or automatic (off by default, button-activated). Red backlight indicates RPM or temperature alerts.
• Installation & Durability: Multiple mounting options (stick-on, screw-on, optional bracket). Signal detection via one-wire wrapping of the spark plug wire (68.8 inches, adjustable length). Features favorable water and shock resistance.
• Power & Convenience: Replaceable Lithium Metal CR2032 battery (included, with insulation sheet for transport). LCD shutdown feature extends battery life during idle periods.

Figure 2: Display showing various hour and temperature functions.

Figure 3: Display showing RPM functions and the spark plug wire for signal detection.

Figure 4: Red backlight indicating an alert or reminder.

3. Setup and Installation

3.1 Unboxing and Initial Setup

Upon receiving your Runleader Digital Tach Hour Meter, carefully unbox all components. The package typically includes the meter unit, a temperature sensor (TS003), mounting accessories, and an instruction manual. Ensure the battery insulation sheet is removed before first use.

Figure 5: Product accessories included in the package.

3.2 Mounting the Meter

The meter offers several mounting options:

• Stick-on: Use the provided 3M adhesive velcro to attach the meter to a clean, flat surface.
• Screw-on: Utilize the pre-drilled holes on the meter and the included bolts/nuts to secure it to a desired location.
• Bracket (Not Included): An optional bracket can be used for mounting on handlebars or other tubular structures.

Figure 6: Various product mounting methods.

3.3 Connecting the Spark Plug Wire (RPM/Hour Tracking)

The meter tracks RPM and hours by sensing the electrical pulses from the spark plug. Wrap the signal pick-up wire 5-8 times around the spark plug cable of your engine. Secure the wrapped wire with a cable tie if necessary. The wire length is approximately 68.8 inches and can be shortened or extended if needed.

3.4 Connecting the Temperature Sensor (TS003)

The TS003 temperature sensor is designed to measure the heat sink temperature. Connect the sensor to the designated port on the meter. Secure the sensor's ring terminal under a bolt on the engine's heat sink or cylinder head to ensure accurate temperature readings.

4. Operating Instructions

4.1 Power On/Off

• Automatic Power On: The meter automatically powers on and displays RPM when it detects engine firing pulses.
• Automatic Power Off: The meter will enter sleep mode after a period of inactivity to conserve battery life.
• Manual Power Off: Press and hold both the 'M' (Mode) and 'S' (Set) buttons simultaneously for 2 seconds to manually turn off the device.

4.2 Display Modes and Navigation

Use the 'M' button to cycle through different display modes:

• TOT (Total Hours): Displays the cumulative engine run time.
• JOB (Job Hours): Displays the run time for a single operation, which can be reset.
• SVC (Service Reminder): Shows the remaining time until the next scheduled service.
• RPM (Revolutions Per Minute): Displays the engine's current RPM.
• MAX RPM: Shows the highest RPM recorded during the current engine run.
• TEMP (Temperature): Displays the current engine temperature.
• MAX TEMP: Shows the highest temperature recorded during the current engine run.

4.3 Setting Engine Firing Patterns (RPM Accuracy)

To ensure accurate RPM readings, set the correct engine firing pattern:

1. With the meter off or in a non-RPM display mode, press and hold the 'S' button to enter the settings menu.
2. Navigate through the settings using the 'M' button until you find the '1P1R', '1P2R', '2P1R', etc. options (refer to your specific engine type in the manual).
3. Use the 'S' button to select the appropriate firing pattern for your engine (e.g., '1P1R' for 1 spark per revolution, 1 cylinder).
4. Confirm your selection by pressing 'M' or waiting for the display to return to normal operation.

4.4 Setting Service Intervals (SVC)

To set a service reminder:

1. In SVC mode, press and hold the 'S' button. The SVC hour value will flash.
2. Use the 'M' button to adjust the desired service interval (e.g., 20 hours, 50 hours).
3. Press 'S' to confirm the setting. The meter will count down these hours and alert you when service is due.

4.5 Setting RPM and Temperature Alerts

The meter can be configured to alert you when RPM or temperature thresholds are exceeded:

• RPM Alert: In RPM mode, press and hold 'S' to enter RPM alert setting. Adjust the value using 'M' and confirm with 'S'.
• Temperature Alert: In TEMP mode, press and hold 'S' to enter temperature alert setting. Adjust the value using 'M' and confirm with 'S'.

When an alert condition is met, the display's backlight will turn red, and the corresponding icon will flash.

4.6 Backlight Modes

The backlight can be set to different modes:

1. Access backlight settings through the main menu (refer to the full manual for exact navigation).
2. Choose between 'Always On', 'Off', or 'Automatic' (off by default, activates with button press).

5. Maintenance

5.1 Battery Replacement

The meter is powered by a replaceable CR2032 Lithium Metal battery. To replace the battery:

1. Locate the battery compartment on the back of the unit.
2. Use a coin or small tool to twist the battery cover counter-clockwise to open.
3. Remove the old battery and insert a new CR2032 battery with the positive (+) side facing up.
4. Replace the cover and twist clockwise to secure it, ensuring a tight seal for water resistance.

Figure 7: Battery compartment for CR2032 battery.

5.2 Cleaning

Clean the meter's display and casing with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could damage the screen or housing. Ensure the unit is dry after cleaning.

6. Troubleshooting

• Display Not Turning On:
  • Check if the battery insulation sheet has been removed.
  • Verify the battery is correctly installed and has sufficient charge. Replace if necessary.
  • Ensure the spark plug wire is properly wrapped around the spark plug cable.
• Incorrect RPM Readings:
  • Confirm the engine firing pattern setting matches your engine type (refer to Section 4.3).
  • Ensure the spark plug wire is securely wrapped 5-8 times around the spark plug cable.
  • Check for any damage to the signal wire.
• Inaccurate Temperature Readings:
  • Verify the TS003 temperature sensor is correctly connected to the meter.
  • Ensure the sensor's ring terminal is securely attached to a metal part of the engine's heat sink or cylinder head for good thermal contact.
  • Check for any damage to the temperature sensor wire.
• Short Battery Life:
  • Ensure the backlight is not set to 'Always On' mode if not required.
  • Manually turn off the meter when not in use for extended periods (Section 4.1).
  • Replace the battery if it is old or frequently drained.

7. Specifications

8. Warranty and Support

The Runleader Digital Tach Hour Meter (RL-HM035A-TS003) comes with a 2-year warranty. For technical assistance or after-sales service, please refer to the contact information provided in your product packaging or visit the official Runleader website.

9. Applicable Devices

This meter is suitable for a wide range of gas-powered small engines, including but not limited to:

• Lawn Mowers
• Tractors
• Compressors
• Generators
• Snowmobiles
• Marine Engines (Jet Skis, Boats)
• Pit Bikes / Motorcycles
• ATVs

Figure 8: Examples of devices compatible with the meter.