Step 1: Connect the sensor to the software on PC through the cable con�iguration tool and

RS232 to USB cable. Then supply a stable 12-24VDC power for the tool cable.

Step 2: Once the sensor is connected, leave the sensor in the air then go to software >> load

con�ig >> load from sensor to upload the sensor con�iguration.

Step 3: After uploading the sensor con�iguration. Click on "Set Empty" and wait until the

completion message appears. The sensor is now set to "Min" level.

Step 4: Take the calibration tube and �ill with oil, then fully immerse the level indicator

until it reaches the vent. Let the sensor stabilize within 120s so that the oil level does not

increase more on the oil display column on the software. Click on "Set Full" and wait for

the completion message to appear. The sensor is now set to "Max" level.

Step 5: Remove the sensors power supply then reboot. The sensor’s new length has

completely been recon�igured.

User Guide

Smart Fuel Level SensorAnalog, Frequecy, RS232, RS485

Version 2.0.2/ 01.09.2018

ATTENTION AND PREPARATION BEFORE INSTALLATION

EXAMINE AND DETERMINE THE INSTALLATION LOCATION BROACH AND DETERMINE SCREW LOCATIONS

CHOOSE SUITABLLE SCREW TYPE FOR THE TANK’S SURFACE MEASURE AND CUT THE SENSOR ACCORDING TO THE OIL TANK’S HEIGHT

- Measure and cut the sensor according to the height of the oil tank by the following

formula:

Lm = H -25

L: Initial length of the sensor’s level indicator

Lm: Length of the sensor after cutting

H: Height of oil tank

25 (mm): Spring and oil �ilter’s height

INSTALL SPRING AND OIL FILTER

1

2

4

5

3

- After the sensor has been con�igured, take the spring and the oil �ilter to assemble again

according to the drawing

CONFIGURE THE LENGTH AFTER CUTTING

1. All installation workers must be trained and instructed accordingly before installing the sensor.

Installation workers must have expertise in the electrical and mechanical engineering sector.

2. Implement protection against electric shocks and electrical �ires, labour safety and hygiene.

3. Installation tools:

+ Electric drill, iron countersink drill bit Φ38 (38-40), iron drill bit (3-7mm), nut riveter tool, pipe cutter and iron saw, tape measure, bavia razor, gasket sealant, iron �iles, plastic cable ties, calibration tools, complete tool box set with removable tools…

+ In addition, please prepare: A laptop with manufacturer’s software installed and device con�iguration toolkit.

4. Complete set of sensor and accessories:

+ LIGO (Options) fuel level sensor: 01pc

+ Gasoline resistant rubber gasket: 01pc

+ Sedimentation oil �ilter: 01pc

+ Anti-vibration spring: 01pc

+ Protect fuse: 01pc

+ Self-drilling screw M5: 04 pcs

+ Rivet M5: 04 pcs

+ Screw M5: 04 pcs

+ Lead seal: 02 pcs

+ Quick user manual: 01pc

STEP 1:

STEP 4:

STEP 6:STEP 5:

STEP 3:

STEP 2:

- For metal and plastic fuel tanks with thicker-than-3mm walls, it is recommended to use M5

self-drilling screws and drill into the surface in advance by 4mm drill bit.

- For metal and plastic fuel tanks with less than 3mm shell thickness, use the 7mm drill bit

and then use the nut riveter tool to make 4 thread screws �ixed to the surface. Then place the

sensor in the oil tank and tighten it with M5 screw.

- At the speci�ied location, use the iron countersink drill bit Φ38 to create holes on the surface

of the oil tank.

- Create 4 more holes whose locations is marked by rubber gaskets, according to the

thickness and the material of the oil tank’s surface.

- Determine the installation location to be closest to the centre and situed at the deepest level

of the oil tank.

- When installing the sensor, avoid contact with partitions, buoys and navel of the oil tank.

1. Insert the oil �ilter lid �irst

2. Insert plastic part of the spring into the sensor head

3. Use 2 screws to secure the plastic part

4. Insert the spring into the plastic part’s location

5. Insert the oil �ilter and lock it tightly with the lid. Turn

slightly until the sound “click” is heard.

INSTALL THE SENSOR INTO THE OIL TANK- Apply gasket sealant to the two sides of the rubber gasket and then put it in the broached

position.

- The best thickness of the adhesive is about 3.5mm.

- Place the sensor in with the same direction to the rubber gasket, use screws to �ix the

sensor to the oil tank.

CONNECT TO EXTERNAL DEVICES- Use 7m PVC coasted conduit to connect the sensor to an external device. Avoid wiring to

places that can in�luence and impact the connecting wires.

- Connect sensor’s output signal to external device according to the following colors:

RECALIBRATE THE NUMBER OF LITERS ACCORDING TO THE OIL TANK’S CAPACITY LEAD SEAL

INSTALLATION NOTICE PRINCIPAL FACTORS FOR THE SENSOR TO OPERATE STABLY AND ACCURATELY

PRINCIPAL FACTORS FOR THE SENSOR TO OPERATE STABLY AND ACCURATELY CONTACT US

(SOJI ELECTRONICS,.JSC)Office: No 10/285, Khuat Duy Tien, Trung Hoa, Cau Giay, Ha Noi, Viet Nam. (100000)Tel/fax: +84 2462 932 369Email: contact@sojielectronics.comWebsite: www.sojielectronics.comThe product is designed and manufactured by SOJI ELECTRONIC JOINT STOCK COMPANY in Vietnam.

STEP 7:

STEP 9:

STEP 8:

STEP 10:

Attention:

- The time between each pumping must be 3-5 minutes apart or wait for the measured value of the

sensor to �inish loading on the device, then comes the next pumping.

- Some GSHT devices need quite a long time to �inish �iltering, so please pay attention to the time for

each pumping.

- Do not use non-standardized measuring and pump tools which can lead to errors. (It is

recommended to go to the nearest petrol station to perform the calibration).

- In order for the sensor to operate most accurately, it is necessary to recalibrate by �illing each time

the number of liters equal to 1/10 ... 1/30 ... the capacity of the oil tank, after each pumping, the

measured value of sensor will be recorded and reassigned on the device.

- The sensor software or GPS device software can be used to perform this calibration.

- Refer to the following standard table of measurement by the capacity of the oil tank:

Volume of the tank V, litres Filling step n, litres Number of control points, m = V\n

0-60 6 10

61-100 5 12-20

101-500 10 10-50

501-1000 20 20-50

Over 1000 As possible …

- After completing the installation and calibrating the sensor according to the oil tank’s

capacity, proceed with sealing the sensor and the 2 connectors together:

- Af�ix lead seal on the sensor by threading the lead wire through the holes of the screws,

then use lead seal pliers to clamp and seal off.

- Install two connectors as described in the picture.

- The oil tank must be checked before installing sensor, if there are residues or water or

corrosive chemicals, they must be removed, then clean the oil tank and ensure its tightness.

- When cutting the tube, gently avoid affecting its inner section. Cuts must be cleaned with

burrs and washed with oil.

- When connecting, two connectors must be wrapped with protective tape to ensure the

durability of the connected parts.

- Please leave us a message if you need any assistance during the installation process.

1. Power supply

- The input power is very important to the operation of the sensor. Before installing, make

sure that the battery power of the car or DC power supply must be in the most stable state,

avoid getting weak batteries when starting the machine, making the power fall below 9VDC,

or �lickering power, loose wire connection. Some old-fashioned vehicles which have

�lickering electric wiring, or vehicles that are mass interrupted continuously should have a

separate power cord from the battery.

- Besides, there are some other problem such as: the voltage is greater than 50VDC due to

being hit by mass, or any problem caused by the car, it is recommended to check the sensor

carefully and add a fuse to protect the sensor’s positive voltage.

2. Installation

- If the sensor is installed in a wrong position where is too far away from the center of the

fuel tank, and the vehicle operating in a steep or bumpy environment stands too long in a

sloping position, this can lead to a false alarm of the fuel sensor for the car’s oil tank is tilted.

- If the vehicle is tilted toward the lower part of the tank, when the vehicle is on a slope, the

fuel will �low to the back of the fuel tank, leading to an increase of fuel with tilt and vice versa.

Therefore, paying attention to the proper installation of fuel tank is very important.

3. Oil tank

- The standard oil tank for the sensor to operate stably is the oil tank without water and dregs

inside. Clean the fuel tank before installation. If the tank has too much dregs and water, they

could enter the 2 sensor tubes, leading to noise and false fuel indication.

4. Con�igure and calibrate the sensor according to oil tank volume

- Based on the operating environment of the oil tank, con�igure the proper liter level, as well

as the accurate "Min" and "Max" levels for the sensor. A computer should be used to install

and con�igure the sensor.

- For the sensor to work properly, the con�iguration and oil measurement according to the

volume of oil tank must be accurate. Choose the standard measuring tools and devices. Each

time of measurement, please wait for the sensor to reach its maximum value before the next

turn.