meitrack ASUF102 Bluetooth Ultrasonic Fuel Level Sensor User Guide

meitrack ASUF102 Bluetooth Ultrasonic Fuel Level Sensor

Change History

Update Date

| 2021-11-15
Subproject| Accessory User Guide| Total Pages| 14
Version| V1.1| Confidential| External Documentation

Copyright and Disclaimer

Copyright © 2021 MEITRACK. All rights reserved.
The user manual may be changed without notice.
Without prior written consent of Meitrack Group, this user manual, or any part thereof, may not be reproduced for any purpose whatsoever, or transmitted in any form, either electronically or mechanically, including photocopying and recording.

Meitrack Group shall not be liable for direct, indirect, special, incidental, or consequential damages (including but not limited to economic losses, personal injuries, and loss of assets and property) caused by the use, inability, or illegality to use the product or documentation.

Product Introduction

The new generation of the Bluetooth all-in-one ultrasonic fuel level sensor uses the ultrasonic reflection feature to detect the fuel level without drilling holes. With a plastic outer case, the device is resistant to strong acids, corrosion, shock, and high temperatures (300°C to 400°C). It is equipped with an internal low-power Bluetooth module, a RS232 serial port, and an analog port to output the fuel level.

Product Functions

• Measure the fuel level of a vehicle.
• Detect a high fuel level alert.
• Detect a low fuel level alert.
• Detect a fuel filling alert and a fuel theft alert.

Product Specifications

ASUF102: 3–250 cm

Maximum tank thickness| 12 mm
Fuel tank supported| Regular or irregular metal, steel, aluminum alloy, and plastic fuel tank
Measuring accuracy| ±0.5%
Measuring resolution| 0.1 mm
Water resistance rating| IP68
Interface| RS232 serial port and analog port (0–5 V)

Users can select one port to connect a tracker.

Bluetooth| Bluetooth 5.0. Users can log in to the FuelGuard app to configure fuel tank parameters and check the status of the fuel level sensor.
---|---

Cable Definition

(9–36 V DC)

| If it is connected to the vehicle battery, a fuse is required.
Black| Power GND or RS232 GND| It is connected to some servers.
Yellow| RS232-Tx: signal output| It is connected to RS232-Rx of a vehicle tracker or a MDVR.
White| RS232-Rx: signal receiving| It is connected to RS232-Tx of a vehicle tracker or a MDVR.
Green| Analog output (0–5 V)| It is connected to the fuel level sensor interface of a vehicle tracker or a MDVR.

LED Indicator

LED Indicator Status

LED Indicator Color| Description
Red (Blink)| No fuel level signal is detected, or the signal strength is weak.
Green (Steady on)| A fuel level signal is stable, and this place can be used to install the sensor.
Yellow (Steady on)| The firmware is being upgraded.

Product Materials

Outer case material: engineering plastics Connector: water-resistant 5-pin gold-plated aviation plug

9-meter extension cable| 1| | Extension cable
---|---|---|---
Sandpaper| 2| **| Used to clean the bottom of the fuel tank.
304 stainless steel cable tie| 1| **| Used to fasten the probe.
Silicone grease| 2| | It is applied on the surface of the probe to exclude air.
Rubber pad| 4| | Used to stick on to the probe.
8-pin to 4-pin cable| 1| | Connect device cables through the RS232 port.
Cable tie hoop| 1| | Adjust the stainless steel cable tie.
Thin cable tie| 10| | Used to fasten the extension cable.

Optional accessories:

tank. (Please purchase it by yourself because we cannot deliver it to you.)

Installation

Users can perform the following operations to install the sensor:

1. Select a proper place to install the sensor.
2. Install the sensor.
3. Connect the sensor to a vehicle tracker or a MDVR.

For details about how to install the sensor, see the following instructions.

Installing the Sensor

Downloading the FuelGuard App
On the FuelGuard app, users can check parameters of the sensor before it is installed, so as to select a proper place to install the probe. The app supports the Android system only. Users can download the app by scanning the following QR code:

Checking the Fuel Level of the Fuel Tank
Prior to the installation, keep the fuel tank at least half full and park the vehicle on level ground. Knock the fuel tank to determine the fuel level.
When there is fuel in the fuel tank, you can hear a muffled sound. When there is no fuel in the fuel tank, it sounds clear. At the meantime, you can open the fuel tank and check the fuel level. You can use any of the preceding ways to determine whether the fuel tank is half full and estimate the fuel level.

Confirming the Installation Location of the Probe
When sticking the probe, keep it away from the fuel inlet and float. As shown in the following figure on the left, the yellow area is suitable to install the probe. If the fuel tank is cylindrical, choose the area that is closest to the ground such as the section shown in the following figure on the right. Clean up the dirt and oil stain in the probe installation area, and keep the area dry.

Connect the probe to the extension cable, arrange the extension cable in the cab, and connect the red wire of the extension cable to vehicle battery’s anode (9–36 V) and the black wire of the extension cable to its cathode (that is, GND wire). After the power is supplied, the LED indicator becomes red, as shown in the following figure.

Clean up the silicone grease on the fuel tank and probe, and keep the probe installation location dry. If the bottom of the fuel tank is covered with paint, use the putty knife or screwdriver to scrape paint. Then use the sandpaper to polish the installation location until the tank metal is exposed. Apply the silicone grease to the probe surface and test the installation location again. After that, keep the installation location clean and dry. As shown in the following figure, the diameter of the polished area is 3.5 cm.

After the power is supplied, the red LED indicator of the probe blinks. Enable the Bluetooth and app “UL212 Fuel” on your phone, and search and connect related device. Place the probe on to the clean area and check the status in real time on the app. If you want to select a proper installation location, meet the following conditions:

1. The LED indicator of the device is green.
2. On the app, the real-time fuel level and smooth fuel level are stable.
3. On the app, the signal strength is greater than 30 or is stable. (Maximum value: 99)
4. On the app, the number of available signals is stable. (Greater than 30. Maximum value: 40.)
5. On the app, the inclination angle is less than 11 degrees. (Preferred value: 1–5 degrees)

Fastening the Sensor

1. Clean and wipe the probe and installation location to keep them clean and dry.
2. Appy a proper amount of AB glue to the probe, evenly stir it for 20–30 seconds, and stick the probe on the marked location.
3. Check whether the data on the app is stable. When the data is stable, use the 304 stainless steel cable tie to fasten the probe.
4. When the cable tie is about to tighten, stick the rubber pad on to a corner of the fuel tank to prevent the fuel tank from damaging. Then fasten the cable tie by using the cable tie hoop.

Device Connection

Connecting a Sensor to a Device
The ultrasonic fuel level sensor can read fuel parameters through the RS232 port or analog port. You can select one as required.

1. Connect the sensor to a device through the RS232 port and then read the fuel level.
2. If the RS232 port of the device is a jack, cut the 4-pin connector and remain the 8-pin connector before the installation. You can connect the sensor to the device as follows:
   | Definition of the 4-Pin to 8-Pin Cable
   ---|---
   No.| Cable Color| Description
   1| Red| Power output

Output voltage: 5 V

2| Black| Ground wire
3| Green| Rx, connected to the Rx interface of the device.
4| White| Tx, connected to the Tx interface of the device.
2. If the RS232 port of the device includes cables (such as the T366 tracker), connect the sensor to the device as follows: 2. Connect the sensor to a device through the analog port and then read the fuel level.

Configuring the Sensor
After the device is connected to the sensor, you can use any of the following ways to configure parameters of the sensor.

1. Configure the sensor by Meitrack Manager.
   Turn on a vehicle tracker or a MDVR, connect it to a computer, and run Meitrack Manager. As shown in the following figure, set Fuel Sensor Type to 5-Ultrasonic, and set other parameters as required. Click Set to save the configurations.

2. Configure the sensor by the MS03 tracking system.
   Please ensure that the device is online. On the MS03, choose Management. On the Management window, select Parameter settings from Use Normal. On the page that is displayed, select a device in the left navigation pane, click Sensor param, and then set related parameters.

Using the MS03 Tracking Platform

Querying Reports
On the MS03 platform, you can choose Reports to check the fuel data.

Querying Historical Data

1. On the MS03, choose Reports. 2. On the Reports window, select Historical data from Use Normal. The Historical data window is displayed. 3. Select a device, set the query time, and click . The results will be displayed, as shown in the following figure.
2. On the Reports window, select Historical data from Use Normal. The Historical data window is displayed.
3. Select a device, set the query time, and click . The results will be displayed, as shown in the following figure.

Querying Sensor Reports
On the Reports window, choose Sensor report from Use Normal.

If you have any questions, do not hesitate to email us at info@meitrack.com

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