MeiTrack A76-100 User manual

MEITRACK Ultrasonic Fuel Level Sensor User Guide
A76-100\A76-250\ASUF105 Ultrasonic Fuel
Level Sensor
User Guide

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 2 -
Change History
File Name
MEITRACK Ultrasonic Fuel Level Sensor User Guide
Project
Creation Date
Update Date
2016-03-31
2022-09-14
Subproject
Accessory User Guide
Total Pages
18
Version
V2.1
Confidential
External Documentation

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 3 -
Contents
1 Copyright and Disclaimer...............................................................................................................................................................- 4 -
2 Product Functions and Specifications............................................................................................................................................- 4 -
2.1 Product Functions...............................................................................................................................................................- 4 -
2.2 Specifications......................................................................................................................................................................- 4 -
3 Accessories ....................................................................................................................................................................................- 5 -
4 Installation.....................................................................................................................................................................................- 6 -
4.1 WiFi tool (Optional Accessory) ...........................................................................................................................................- 6 -
4.2 Installing the Sensor ...........................................................................................................................................................- 6 -
4.3 Installing the Tracker.........................................................................................................................................................- 13 -
5 Configuring the Sensor ................................................................................................................................................................- 15 -
5.1 Configuring the Sensor by Meitrack Manager or MS03....................................................................................................- 15 -
6 Querying Reports.........................................................................................................................................................................- 17 -
6.1 Historical Data...................................................................................................................................................................- 17 -
6.2 Sensor Report ...................................................................................................................................................................- 17 -

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 4 -
1Copyright and Disclaimer
Copyright © 2022 MEITRACK. All rights reserved.
and are trademarks that belong to Meitrack Group.
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.
2Product Functions and Specifications
2.1 Product Functions
Measure vehicle's fuel level.
Detect an alarm when the fuel level is too high.
Detect an alarm when the fuel level is too low.
Detect a fuel filling alarm and a fuel theft alarm.
2.2 Specifications
Item
Specifications
Operating voltage
9–36 V DC
Maximum power consumption
0.36 W/12 V DC
Operating temperature
-30°C to 80°C
Storage temperature
-40°C to 85°C
Operating humidity
5%–90%
Measurement range（(for 5mm
thick steel plate, in three models)
A76-100
Measurement range is 6~100cm
A76-250
Measurement range is 6~250cm
ASUF105
Measurement range is 6~400cm
Pressure range
≤0.8 kg or 0.8 MPa
Measurement accuracy
±0.5%
Measurement resolution
0.1 mm
Explosion proof rating
Intrinsic Safety Exia
Ⅱ
CT6; flameproof Exd
Ⅱ
CT5
Water resistance rating
IP67
Interface
RS232 or RS232+AD
Communication port parameters
Baud rate 115200 by default; no parity bit; 8 data bits; 1 stop bit; no flow
control

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 5 -
3Accessories
Standard accessories:
Standard Accessories
Quantity
Picture
Probe (integrated type)
1 pcs
Diameter: φ33 mm
Height: 12 mm
Wire length: 1m (including the connector)
Protective holder and ring gasket
1 pcs
Fuse
1 pcs
8m extension cable
1 pcs
Wire length: 8m (including the connector)
8 pin to 4 pin conversion cable
1 pcs
rubber pad and 2.5m length steel
clamp (Quantity is selected according
to installation requirements)
Sandpaper
1 pcs
Used to clean the bottom of the fuel tank.
Note: There are two ways to fix the sensor probe, 1. ring gasket + steel clamp, 2. strong magnetic holder + AB glue. the
standard for A76-100 and A76-250 is the first one, ASUF105 is the second one. If you choose A76 for fuel tanker, it is
recommended to use the second one, please consult the sales for such case.
Optional accessories:
Optional Accessories
Picture
AB glue (unable to go through logistics, so cannot
provide. Only for reference)
Couplant (unable to go through logistics, so cannot
provide. Only for reference)

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 6 -
WiFI tool
Note:
1. Because Couplant and AB glue are liquids, they cannot be transported by logistics.Please buy by yourself.
2. Couplant for medical use can be purchased at large pharmacies. If you can't get it, use toothpaste instead.
3. AB glue is available on websites such as amazon. The model is 3M DP110. As the following picture:
4Installation
4.1 WiFi tool (Optional Accessory)
This WiFI tool is used to find the probe installation location, need to bring your own power bank for power supply.
4.2 Installing the Sensor
1. Important note: Prior to the installation, keep the fuel tank at least half full and park the vehicle on level ground.
2. Knock the fuel tank to determine the fuel level.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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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.
3. Know more information about probe installation.
When sticking the probe, keep it away from the fuel inlet and float. As shown in the following figure, the yellow area is
suitable to install the probe.
123
If the fuel tank is cylindrical, choose the area that is closest to the ground such as the section shown in the following
figure.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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Clean up the dirt and oil stain in the probe installation area, and keep the area dry.
4. Configure the WiFi tool
1) Connect the sensor with WiFI tool first;
2) Connect the WiFi tool to power bank and power on.Once conncted,the red indicator light is on.
3) Turn on the list of available wireless networks on your mobile phone, select the network which start with USR-WIFI and
click connect. Once connected, the green indicator light is on.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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4) Please scan the QR code with Android phone, download and install the APP.
A76-100\A76-250
ASUF105
Note: The WiFi tool is only used to locate the installation position and can be reused.
5. Locate the installation position
Clean up the couplant 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.
Put the couplant (pea size) on the surface of the senor (the side without the label).
Hold the sensor on the installation area, check the result on your phone. If the result is ok, make a circle mark with the
screwdriver. If not, try another position.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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WiFi Tool-APP results
Note: The sensor's sensitivity is high. Hold the probe steady because shaking will make data unstable. If an angle alarm is
generated, park the vehicle on level ground before installing the probe.
6. Install the sensor
After locate the installation position, please clear the testing couplant on the surface of fuel tank and sensor completely.
1) Install the A76-100 or A76-250
Install the protective holder:
Please make sure the center of the holder matches the marked round installation position, also the holder should be
parallel to the vehicle frame (chassis).
Fix the probe
Put the ring gasket on the surface of the sensor, then fill the measuring area with grease, make it a bit higher than the
ring gasket. There must be no air bubbles or dust or sand inside the grease. (If you don't have grease, please use
toothpaste instead.)

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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Insert the sensor into the holder and install the cover plate.
install the steel clamp
• Stick the rubber pad on the four corners of tank;
• Fasten the steel clamp;
• Fasten the joint of the clamp with a cable tie;
• Check the installation status on the APP.
2) Install the ASUF-104
The previous steps are the same, fixing the probe need to use AB glue.apply the AB glue to the probe and holder, and
evenly stir it(No need to place the gasket).

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 12 -
After the glue is stirred evenly, we will not see hot or green color.
Stick the probe on the marked location and check the app result is ok or invalid. If no, move the probe slowly within 2–3
mm and find the right installation location.
If the ambient temperature is 25°C, move the probe for 30 seconds after sticking the probe. In this way, if the result is
unable to install, remove the probe, clean up all AB glue, and apply glue to the probe surface again. Because the AB glue
does not work at this moment.
If the result is ok to install, hold the probe for 5–15 minutes until the glue is solidified. While pressing, ensure that the
status code is always ok to install.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 13 -
Note:
4. When the ambient temperature is 25°C, you are advised to finish the stir within 20 seconds.
5. When the ambient temperature is more than 30°C, finish the stir as soon as possible. Because the higher the
temperature is, the shorter the solidification time is.
6. When the ambient temperature is less than 0°C, you are advised to heat the probe (at around 20°C) before applying
AB glue to it.
4.3 Installing the Tracker
1) Using RS232 standard interface. The device wiring diagram is as follows:
Note:
1. Both RS232 ports of T633L support the connection of ultrasonic fuel sensor, RS232-1 can be connected directly, RS232-2
needs to be connected with 4pin conversion 8pin cable.
2. T366 series and T399 series do not have 4pin RS232 interface, connecting sensor need to cut open the 4pin end of the
extension cable for the following connection.
T366/T399 cables
Extension cables
Red(connect to external power supply)
Red（9~36VDC）
Black GND
Black
Purple（RS232-TX）Blue（RS232-RX）
Brown（RS232-RX）Yellow（RS232-TX）
3. Whether the device supports ultrasonic fuel sensor and which ports support it,you can open the accessory interface of

MEITRACK Ultrasonic Fuel Level Sensor User Guide
Copyright © 2022 Meitrack Group All rights reserved. - 14 -
Meitrack Manager, check the peripheral type setting, if there is an ultrasonic fuel sensor option, it means it is supported.
2) Connecting with AD input , connection as below.
Devoce I/O cables
Extention cables
Red(external power supply)
Red（9~36VDC）
Black GND
Black
AD input cable
Green（AD 0~5V）
Note: 1. The color of the AD input cable varies from model to model, please refer to the user manual of the corresponding
model for details.
2. When connecting with the AD input, you need to change the fuel sensor type to V-type in Meitrack Manager.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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5Configuring the Sensor
5.1 Configuring the Sensor by Meitrack Manager or MS03
1. Turn on the tracker, connect it to a computer, and run Meitrack Manager. On the Device tab page, locate Oil sensor setting,
set Use model to 5-Ultrasonic, and set other parameters as required, as shown in the following figure. Click Set to save the
configuration.
Note:
1) When connecting with RS232 port, the full oil value must be set according to the actual tank height , otherwise the oil
percentage will not be displayed properly, and the empty oil value set to 0
2) When connecting with AD input, instead of setting full oil value in Meitrack Manager, you need to set the tank height
in WiFi installation tool as shown below. the voltage value of AD port is 0~5V, the set tank height corresponds to the
maximum voltage value 5V as the full fuel voltage value, default is the maximum range of sensor.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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2. You can also set the sensor by MS03 tracking system. Please ensure that the tracker is online.
On MS03, choose Management. On the Management window, select Parameter settings from Use Normal. On the page
that is displayed, select a tracker in the left navigation pane, click Sensor parameters, and then set related parameters.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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6Querying Reports
6.1 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 tracker, set the query time, and click . The results will be displayed, as shown in the following figure.
6.2 Sensor Report
1. On the Reports window, choose Sensor report from Use Normal. The Sensor report window is displayed.

MEITRACK Ultrasonic Fuel Level Sensor User Guide
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2. Select a tracker and sensor, set the query time, and click . The results will be displayed, as shown in the following
figure.
If you have any questions, do not hesitate to email us at [e-mail].