Omnicomm LLS 4 User manual

Omnicomm LLS 4 Fuel Level
Sensors
User Manual
23.03.2018

Contents
General
3
Specifications
4
Preparation
5
Fuel Tank Preparation
5
Sensor Preparation
7
Setting
8
“Empty/Full” Calibration
10
Omnicomm LLS 4 Sensor Setting
11
Installation and Connection
11
Gauging
13
Sealing
16
Appendix. List of equipment for Omnicomm LLS 4 fuel level sensors installation
18

Omnicomm LLS 4 Fuel Level Sensors
General
This User Manual is designed for Omnicomm LLS 4 fuel level sensors.
Omnicomm LLS 4 is a fuel level sensor with RS-232 and RS-485 interfaces.
While carrying out installation, observe the safety rules and regulatory requirements
for this type of work.
Minimum allowable length of the measuring piece is 150 mm.
The dielectric permeability of the measured medium should be constant. Failure to
comply with this requirement will lead to increased measurement error.
General
Omnicomm LLS 4 Fuel Level Sensors 3

Specifications
Parameters Value
Power supply voltage, V 7 – 80
Power consumption, W 0,4
Measurement range, mm 0…700, 1000, 1500, 2000,
2500, 3000
Main reduced error of measurement of the sensor, % ±1
Relative humidity at 25 °С (without moisture condensation),
%
From 5 to 95
Atmospheric pressure, kPa From 84 to 107
Maximum relative humidity at 25 °С (without moisture
condensation), %
100
Working temperature range, °С From - 60 to + 85
Body protection rating IP69k
Operating mode Continuous
Internal filter size From 0 to 30
Measurement time period, s 1
Overall dimensions, cm 78×74×(24+length of
measuring piece)
Specifications
Omnicomm LLS 4 Fuel Level Sensors 4

Weight, kg Not more than 2
Average service life, years 8
Output interface for measured values RS-232, RS-485
Programmable interface transmission rate, bit/s 2400, 4800, 9600, 19200,
38400, 57600, 115200
Digital reading range corresponding to the maximum level
measurement value
1…4095
Digital reading range corresponding to the minimum level
measurement value
0…1023
Temperature measuring range, °С From - 40 to +80
Absolute error in temperature measurement within the
entire temperature measuring range, °С
±2
Parameters Value
Preparation
Fuel Tank Preparation
1. Select the location for Omnicomm LLS 4 sensor installation subject to the following
requirements:
Installation location should be as close as possible to the geometric center and
placed at the deepest level of the tank:
Preparation
Omnicomm LLS 4 Fuel Level Sensors 5

When installed, the sensor should not be in contact with reinforcement ribs inside
the tank
Installation of two sensors in one tank allows for significant reduction of the fuel
level dependence on the vehicle inclination angle:
2. Steam out the tank to ensure compliance with the safety rules
3. Drill out the central bore by bimetal core drill ø35 mm
4. Drill out four mounting holes according to the diagram:
Preparation
Omnicomm LLS 4 Fuel Level Sensors 6

The mounting hole diameter depends on the tank material:
ø 4 mm – for metal tank with wall thickness over 3 mm (cut M5 thread)
ø 7 mm – for plastic and metal tank with wall thickness up to 3 mm (for rivets)
ø 4 mm – for plastic tank with wall thickness over 3 mm
Sensor Preparation
1. Measure the tank depth. Cut the sensor measuring piece so that its length is 20
mm less than the depth of the tank. Ensure that shearing line is perpendicular to
the sensor longitudinal axis
2. Use oil-and-petrol resistant non-conductive sealant to fill the vendor furnished
insulation cap up to 1/4–1/5 of its volume. Recommended sealants: PERMATEX™
MotoSeal® Black, ABRO™ Black, ABRO™ Red
3. Put the insulation cap on the Omnicomm LLS 4 sensor central rod
Preparation
Omnicomm LLS 4 Fuel Level Sensors 7

Setting
Connect the sensor to PC or tablet.
Connect Omnicomm LLS 4 sensors according to the diagram:
Launch Omnicomm Configurator on PC or tablet.
Setting
Omnicomm LLS 4 Fuel Level Sensors 8

Omnicomm Configurator (PC):
Fuel level is displayed without regard for filtration.
Setting
Omnicomm LLS 4 Fuel Level Sensors 9

Omnicomm Configurator (Android):
“Empty/Full” Calibration
Perform calibration in the fuel, in which the fuel level sensor Omnicomm LLS will
operate.
1. Fill the measuring container with fuel
2. Immerse the Omnicomm LLS sensor in the fuel to the full length of the measuring
piece
3. Wait for green indicator “Level Stabilized” to appear.
In the “Settings” tab, “Empty/Full Calibration” section, press “Full” button, then the
value corresponding to the full tank will be set
4. Take the Omnicomm LLS sensor out of the container and allow the fuel to flow
down the measuring piece for 1 minute. In the “Empty/Full Calibration” section,
press “Empty” button, then the value corresponding to the empty tank will be set
5. Press the “Write to Device” button
Setting
Omnicomm LLS 4 Fuel Level Sensors 10