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Well T812 - User Manual

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Car Smart Digital Meter
Model: T812
(This product Design Patent and Display Images Copyright had been registered with
customs record)
Introduction
The main function is to display the car dashboard information(e.g.speed,driving
direction,local time,driving distance,driving time ),and keep the drivers eyes always
on road to avoid the dangerous of lowering down head to read the dashboard.
Kindly Attention:
OBD2 mode working voltage: 11V~18VDC (12vdc/200ma), when voltage is higher
than 24v, please use a USB cable for GPS mode
System Choice:
This product is a dual system (OBD2+GPS): push left the wave button to choose
OBD2 or GPS system, if you have no operation, after 5 seconds,HUD will
automatically enter into the OBD2 system.
For second use, when HUD start, if dont push the wave button, after 5 seconds, HUD
will automatically enter into the system the last time chosen.
OBD Systemavailable for cars with OBD2 interfaceOnly OBD line can be used
GPS Systemuniversal for cars,buses,trucksBoth OBD line and USB line can be
used
Restart the machine and choose the GPS system to use when the OBD2
system is not compatible.
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Summary

Introduction to Car Smart Digital Meter

Main Functionality

Displays car dashboard information and keeps driver's eyes on the road.

Important Operational Notes

Voltage and Mode Selection

Details working voltage for OBD2 mode and guidance for using USB cable for GPS mode.

System Choice: OBD2 vs. GPS

Explains how to choose between OBD2 and GPS systems and automatic entry logic.

Device Controls and Functions

Device Components Overview

Identifies key physical components: setting button, light sensor, and power interface.

Button Operation Modes

Details the functions of short press, push left, push right, and long press for menu navigation and settings.

Function Abbreviations and Menu Navigation

Common Function Abbreviations

Lists and defines abbreviations for various car parameters displayed by the device.

Setting Mode Navigation

Explains how to enter, navigate, and exit the setting mode using the device buttons.

OBD2 System Settings Menu

Details the available settings and submenus within the OBD2 system configuration.

GPS System Settings and Functionality

GPS System Settings Menu

Details the available settings and submenus within the GPS system configuration.

Detailed Setting Functions

Explains how to adjust language, sound, speed alarms, and other customizable parameters.

Advanced Settings and Tests

Alarm and Calibration Settings

Covers alarm settings for battery, speed, coolant, RPM, and calibration options.

Display and Unit Customization

Details settings for screen colors, brightness, units (KM/H, MPH), and distance tracking.

Driving Test Modes

Describes the Speedup Test and Brake Test functions for performance evaluation.

Troubleshooting and Technical Details

Error Code Set Operations

Instructions for scanning and cleaning Diagnostic Trouble Codes (DTCs).

Important Usage Notes

Recommendation to unplug the device when not in use for extended periods due to standby current.

Technical Specifications

Provides environmental, electrical, and physical specifications of the device.

OBD2 System Troubleshooting

Addresses issues like no display, no power, and automatic power off in OBD2 mode.

Advanced Troubleshooting Scenarios

Inaccurate Speed and Fuel Consumption

Guidance on correcting inaccurate speed readings and fuel consumption data.

Alarm and Auto Power Off Issues

Troubleshooting for alarm settings and the device failing to auto power off.

Auto Start;Stop Cars and Crashes

Instructions for handling auto start/stop cars and resolving operational errors.

GPS System Troubleshooting Guide

GPS Display and Power Issues

Troubleshooting steps for no display or no power issues when using the GPS system.

Inaccurate Time and Speed in GPS Mode

Guidance on correcting inaccurate time and speed readings when using GPS.

GPS Auto Power Off and Crashes

Troubleshooting for the device not auto powering off and resolving operational errors in GPS mode.

Summary

Introduction to Car Smart Digital Meter

Main Functionality

Displays car dashboard information and keeps driver's eyes on the road.

Important Operational Notes

Voltage and Mode Selection

Details working voltage for OBD2 mode and guidance for using USB cable for GPS mode.

System Choice: OBD2 vs. GPS

Explains how to choose between OBD2 and GPS systems and automatic entry logic.

Device Controls and Functions

Device Components Overview

Identifies key physical components: setting button, light sensor, and power interface.

Button Operation Modes

Details the functions of short press, push left, push right, and long press for menu navigation and settings.

Function Abbreviations and Menu Navigation

Common Function Abbreviations

Lists and defines abbreviations for various car parameters displayed by the device.

Setting Mode Navigation

Explains how to enter, navigate, and exit the setting mode using the device buttons.

OBD2 System Settings Menu

Details the available settings and submenus within the OBD2 system configuration.

GPS System Settings and Functionality

GPS System Settings Menu

Details the available settings and submenus within the GPS system configuration.

Detailed Setting Functions

Explains how to adjust language, sound, speed alarms, and other customizable parameters.

Advanced Settings and Tests

Alarm and Calibration Settings

Covers alarm settings for battery, speed, coolant, RPM, and calibration options.

Display and Unit Customization

Details settings for screen colors, brightness, units (KM/H, MPH), and distance tracking.

Driving Test Modes

Describes the Speedup Test and Brake Test functions for performance evaluation.

Troubleshooting and Technical Details

Error Code Set Operations

Instructions for scanning and cleaning Diagnostic Trouble Codes (DTCs).

Important Usage Notes

Recommendation to unplug the device when not in use for extended periods due to standby current.

Technical Specifications

Provides environmental, electrical, and physical specifications of the device.

OBD2 System Troubleshooting

Addresses issues like no display, no power, and automatic power off in OBD2 mode.

Advanced Troubleshooting Scenarios

Inaccurate Speed and Fuel Consumption

Guidance on correcting inaccurate speed readings and fuel consumption data.

Alarm and Auto Power Off Issues

Troubleshooting for alarm settings and the device failing to auto power off.

Auto Start;Stop Cars and Crashes

Instructions for handling auto start/stop cars and resolving operational errors.

GPS System Troubleshooting Guide

GPS Display and Power Issues

Troubleshooting steps for no display or no power issues when using the GPS system.

Inaccurate Time and Speed in GPS Mode

Guidance on correcting inaccurate time and speed readings when using GPS.

GPS Auto Power Off and Crashes

Troubleshooting for the device not auto powering off and resolving operational errors in GPS mode.

Overview

This document describes the Car Smart Digital Meter, Model: T812, a device designed to display car dashboard information and enhance driving safety. The product's design patent and display images are registered.

Function Description

The primary function of the T812 is to project essential car dashboard information, such as speed, driving direction, local time, driving distance, and driving time, directly into the driver's line of sight. This helps drivers keep their eyes on the road, reducing the need to look down at the dashboard and mitigating potential hazards.

The device operates as a dual system (OBD2+GPS). Users can select between OBD2 or GPS mode by pushing the wave button to the left. If no operation is performed within 5 seconds of power-up, the device automatically defaults to the OBD2 system. For subsequent uses, if the wave button is not pressed, the device will automatically enter the system chosen during the last use after 5 seconds.

OBD System: This mode is compatible with cars equipped with an OBD2 interface. It exclusively uses an OBD line for connection. GPS System: This mode is universally compatible with cars, buses, and trucks. It supports both OBD and USB lines for connection. If the OBD2 system is not compatible with the vehicle, users are advised to restart the device and select the GPS system.

Important Technical Specifications

  • OBD2 Mode Working Voltage: 11V~18VDC (12vdc/200mA). If the voltage exceeds 24V, the device should be used in GPS mode with a USB cable.
  • Environment Temperature: -40°C to +80°C
  • Atmospheric Pressure: 86-106KPa
  • Relative Humidity: 10%-95%
  • Environmental Noise: <= 60dB (A)
  • Alarm Sound Level: >= 30dB (A)
  • Working Voltage: 5V ~ 24Vdc (12Vdc / 400mA)
  • Product Size: 107mm x 57mm x 20mm
  • Product Weight: 50g

The device is compatible with cars supporting the OBD2 agreement and EU-OBD agreement (European region: after 2003; Other regions: after 2007). It does not support JOBD and OBDI systems.

Usage Features

The device features a setting button that can be pushed left, right, or pressed short/long. It also includes a light sensor and a power interface.

Button Functions:

  • Short press in:
    • Switches the display mode.
    • Confirms menu selections after entering the menu.
  • Push left:
    • Switches between OBD and GPS systems within 5 seconds of power-up.
    • Switches functions in the left display area.
    • Changes function settings after entering the menu (decreases values in setting mode).
  • Push right:
    • Switches functions in the right display area.
    • Changes function settings after entering the menu (increases values in setting mode).
  • Long press in: After entering the menu and completing settings, a 5-second long press saves the settings and exits the menu.

Setting Mode (Menu Mode): To enter the setting mode, long press the setting button. Use the right push to navigate through menu options and a short press to confirm. A long press saves settings and exits.

Function Abbreviations:

  • ECT: Engine Coolant Temperature
  • RPM: Revolutions Per Minute
  • DIS: Single Driving Distance
  • OIT: Oil Temperature
  • TCP: Turbo-charging Pressure (air pressure)
  • GPS: Available Satellites
  • RTC: Real-Time Clock
  • VLT: Voltage
  • ODO: Odometer
  • FUE: Fuel Consumption
  • TIM: Single Driving Time
  • MAP: Manifold Air Pressure
  • A/F: Air Fuel Ratio
  • PSI: Pounds per Square Inch (Intake air pressure)
  • DIR: Driving Direction
  • ASL: Altitude

Setting Functions (adjustable in menu mode):

  • Language Set: Choose between English, Simplified Chinese, or Traditional Chinese.
  • Sound Switch: Turns the buzzer on or off.
  • Speed Alarm: Default value is 150. Adjustable.
  • Coolant Alarm: Default value is 120°C. Alarms when coolant temperature exceeds 120°C.
  • RPM Alarm: Default value is 6000r. Alarms when RPM exceeds 6000r.
  • BAT Alarm: Default value is 10.5V. Alarms when battery voltage drops below 10.5V.
  • Speed Adjust: Adjusts the displayed speed to match the dashboard. Default is 107%.
  • Speed Offset: If the device shows speed (e.g., 5KM/H) after the vehicle turns off, adjust this value to match the device's displayed speed.
  • BAT Adjust: Allows adjustment if the battery voltage differs from the vehicle's.
  • Engine Size: Default is 1.6L. Adjust if fuel consumption differs significantly from the dashboard.
  • Fuel Adjust: Default is 100%. Adjustable.
  • Change Color 1: Sets the color for top functions on the screen.
  • Change Color 2: Sets the color for left/middle functions on the screen.
  • Change Color 3: Sets the color for right/bottom functions on the screen.
  • Brightness: Default is 0 (Automatic sensitivity). Values 1-8 increase brightness.
  • CWT Unit: Default coolant temperature unit is °C, can be changed to °F.
  • Speed Unit: Can be changed between KM/h or MPH.
  • Sum Distance: Allows setting the total driving distance to match the dashboard (e.g., if the dashboard shows 30000Km, set the device to 30000KM).
  • Power Off Time: Default is 10s. For auto start/stop cars, set to 180-240s.
  • Sleep Voltage: Default is off. If the device doesn't auto-off, adjust to 13.2V or higher.

Driving Test Features:

  • Speedup Test: Displays speed, distance, time for 400m, and time for 100m.
  • Brake Test: When speed exceeds 60 KM/H, it shows brake distance and time.

Data Stream: Displays all vehicle data stream information.

Maintenance Features

Error Code Set:

  • Scan DTCs: Scans the ECU for error codes and displays details.
  • Clean DTCs: Switches to the "Clean DTCs" option, then a short press on the button clears the error codes.

Troubleshooting (OBD2 System):

  • No display/power:
    • Start the car engine.
    • Check if the OBD cable is securely connected.
    • Ensure the product's power switch is on.
    • If still no display, test on another car to check if the car's OBD diagnostic interface is faulty.
  • Only shows car voltage, then auto power off after 60 seconds:
    • This indicates the product is not compatible with the car's OBD system (e.g., JOBD or OBDI). Test on another compatible car.
  • Inaccurate Speed:
    • Verify the speed unit (KM/H or MPH) is correct.
    • Adjust the "Speed Adjust" option in the settings to match the dashboard's reading.
  • Inaccurate Fuel Consumption:
    • Check and set the "Engine Size" to match your car's displacement.
    • "Fuel Adjust" can be adjusted, but it's generally not recommended as data is read directly from the ECU.
  • RPM Alarm: Adjust the "RPM Alarm" setting.
  • Over Speed Alarm: Adjust the "Speed Alarm" setting.
  • Device cannot auto power off:
    • If speed is displayed after the vehicle turns off, adjust "Speed Offset" to match the displayed speed.
    • If RPM is displayed after the vehicle turns off, adjust "Sleep Voltage" to 13.2V.
  • Auto start and stop cars: Change "Power off time" to 180s.
  • Wrong operation leading to crashes: Perform a "Factory set" to reset the device.

Troubleshooting (GPS System):

  • No display/power:
    • Start the car engine.
    • Check if the cable line is tight, or connect the USB to a computer to check.
  • Inaccurate time:
    • After the device successfully searches for satellites (default 8:00 will change to China local time), set it to your local time and save.
  • Inaccurate Speed:
    • Adjust the "Speed Adjust" option in the settings to match the dashboard's reading.
  • Over speed alarm: Adjust the "Speed Alarm" setting.
  • Device cannot auto power off:
    • If speed is displayed after the vehicle turns off, adjust "Speed Offset" to match the displayed speed.
  • Wrong operation leading to crashes: Perform a "Factory set" to reset the device.

Well T812 Specifications

General IconGeneral
BrandWell
ModelT812
CategoryMeasuring Instruments
LanguageEnglish