Omnicomm LLS-Ex 5 User manual
Omnicomm LLS-Ex 5 Fuel
Level Sensor and BIS-MX
Intrinsic Safety Unit
User Manual
06.07.2020
Contents
General Information
4
Omnicomm LLS-Ex 5 sensor
4
BIS-MX Intrinsic Safety Unit
4
Technical Specifications
6
Omnicomm LLS-Ex 5 sensors
6
BIS-MX Intrinsic Safety Unit
8
Electrical Parameters of Intrinsic Safety
9
Omnicomm LLS-Ex 5 sensor
9
Special conditions for safe operation of Omnicomm LLS-Ex 5
9
Preparation
10
Fuel Tank Preparation
10
Sensor Preparation
12
Setting
13
“Empty/Full” Calibration
15
Omnicomm LLS-Ex 5 Sensor Settings
16
Installation and Connection
17
Connecting the Omnicomm LLS-Ex 5 fuel level sensor to an external device using BIS-
MX
20
Calibration
22
Sealing
25
Recommendations for the assembly of the fuel sensors from 3 to 6 meters in
length
26
Fuel level sensor installation recommendations for cylindrical fuel tanks
27
Appendix. List of equipment for Omnicomm LLS-Ex 5 fuel level sensors and BIS-MX Intrinsic
Safety Unit installation
30
Omnicomm LLS-Ex 5 sensor
30
BIS-MX Intrinsic Safety Unit
31
Omnicomm LLS-Ex 5 Fuel Level Sensor and
BIS-MX Intrinsic Safety Unit
General Information
This User Manual is designed for Omnicomm LLS-Ex 5 fuel level sensor and BIS-MX
Intrinsic Safety Unit.
Omnicomm LLS-Ex 5 sensor
Omnicomm LLS-Ex 5 fuel level sensors are designed to measure fuel level in tanks of
vehicles and stationary fuel storages.
Fuel level sensors also measure the temperature. RS-485 or RS-232 interfaces are used to
exchange information with the device.
The Omnicomm LLS-Ex 5 fuel level sensor is installed on special types of equipment or on
stationary fuel tanks and storages, which require equipment explosion protection and
have the “0ExiaIIBT6X” explosion protection label.
The sensor calibration is adjusted automatically when fuel composition or properties
change.
The types of fuel in which the sensor can operate: gasoline, summer fuel and winter
diesel fuel and other liquid light petroleum products.
Different versions of Omnicomm LLS-Ex 5 are available depending on the length of the
measuring probe: 700 mm, 1000 mm, 1500 mm, 2000 mm, 2500 mm, 3000 mm. Any
measuring probe longer than 3000 mm is composite.
The Omnicomm LLS-Ex 5 fuel level sensor is installed together with the BIS-MX spark
protection unit manufactured by Omnicomm.
BIS-MX Intrinsic Safety Unit
BIS-MX intrinsic safety unit on voltage regulation tubes is designed to protect intrinsically
safe circuits when exposed to a voltage of up to 250 V.
BIS-MX is designed to be located outside of the hazardous area.
BIS-MX is designed for installation in electrical circuits connecting Omnicomm LLS-Ex 5
4
General Information
fuel level sensor, located in a hazardous area, and an external device, located in an
explosion-proof area, and limits the values of voltage and current to intrinsically safe.
BIS-MX must always be grounded when in use.
BIS-MX is part of the connected electrical equipment; it executes the “intrinsically safe
electrical circuit” type of explosion protection - i, the “extra explosion-proof” level of
explosion protection - a, and IIB category, carries the [Exia] IIB explosion-proof marking.
BIS-MX is a passive device.
5
General Information
Technical Specifications
Omnicomm LLS-Ex 5 sensors
Parameter Value
Level measurement range
depending on the version, mm
0…700, 1000, 1500, 2000, 2500, 3000, 4000, 5000, 6000
REF-channel length, mm
- for sensors of 700, 1000 mm
length
- for sensors longer than 1500
mm
200
700
Limit of the allowed main
reduced error of level, %
± 0,5 (when working with fuel for which the calibration have
been performed, or upon filling up the tanker full in case of
changing fuel type)
Interface for measured values
output
RS-232, RS-485
Programmable interface
transmission rate, bit/s
1200, 2400, 4800, 7200, 9600, 14 400, 19 200, 38 400, 57 600,
115 200
Power supply voltage, V 5,1
Power consumption, not more
than, W
0,4
Current consumption, not more
than, mA
40
6
Technical Specifications
Body protection rating IP69k
Electric strength of galvanic
insulation, not less than, V
7000
Terms of Use:
Ambient temperature, °С From -40 to +80
Extreme temperatures, °С From -60 to +85
Maximum humidity, % 100
Digital code range
corresponding to the maximum
level measurement value
1…4095
Digital code range
corresponding to the minimum
level measurement value
0…4095
Temperature measuring range,
°C
From -40 to +80
Measurement time period, sec 1
Automatic data output interval,
sec
From 1 to 255
Operating mode Continuous
Overall dimensions, mm 87.3 x 83.5 x (21 + measuring probe length)
Parameter Value
7
Technical Specifications
Weight, not more than, kg 2
Average service life before
sensor failure, not less than,
hours
100 000
Average service life, years 12
Parameter Value
BIS-MX Intrinsic Safety Unit
Parameter Value
Power supply voltage, V 8 - 50
Maximum input voltage Um, V 250
Open-circuit voltage U0, V 2 x 5.1
Short-circuit current I0, A 2 x 0.13
Maximum external capacitance С0, µF 2 x 15
Maximum external inductance L0, mH 2 x 1.0
Operating temperature range, °С From -60 to +80
Body protection rating IP69k
8
Technical Specifications
Overall dimensions (without cables), mm 138 х 115 х 56
Weight, not more than, kg 0.9
Average service life, years 8
Parameter Value
Electrical Parameters of Intrinsic Safety
Omnicomm LLS-Ex 5 sensor
Parameter name Value
Maximum input voltage, Ui, V 5.5
Maximum input current, Ii, A 0.06
Maximum internal capacity, Ci, µF 10
Maximum internal inductance Li, mH 0.5
Special conditions for safe operation of
Omnicomm LLS-Ex 5
In order to avoid ignition from frictional sparks (which appear from friction or collision), it
is recommended to install at places which restrict access to the exterior parts of the fuel
sensor. It is necessary to protect the sensors body from accidental shocks or friction.
It is recommended to use a protective seal cover.
It is not recommended to use a sensor with the damaged paint coating.
9
Electrical Parameters of Intrinsic Safety
Preparation
Fuel Tank Preparation
1. Select the location for Omnicomm LLS-Ex 5 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:
When installed, the sensor should not be in contact with reinforcement ribs and
auxiliary equipment inside the tank
Installation of two sensors in one fuel 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:
10
Preparation
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