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

The mounting hole diameter depends on the tank material:
ø 4 mm – for metal tanks with wall thickness over 3 mm (cut M5 thread)
ø 7 mm – for plastic and metal tanks with wall thickness up to 3 mm (for rivets)
ø 4 mm – for plastic tanks with wall thickness over 3 mm
11
Preparation

Sensor Preparation
1. Cut the sensor measuring probe according to the following recommendations:
The length of the sensor measuring part should be 20mm less than the depth of the
tank.
The REF channel must be at least 100 mm shorter that the measuring part of the
sensor. If the difference is less than 100 mm, trim the REF channel according to the
figure:
2. Install the central partition into the sensor measuring part at the depth of 1 cm.
Cut the REF channel (only if the length of the REF channel and the measuring part is
less than 100 mm):
1. Install the central partition in the REF channel in close proximity to the cut point.
2. Cut with a cutting wheel (max. 125 mm in diameter)
3. Remove a section of the REF channel rod
The REF channel rod is shorter than the main measuring rod and is located on the right
when looking at the sensor body on the connector side.
12
Preparation

Setting
Firmware update is only done via RS-485 interface connection.
Connect the sensor to a PC.
Omnicomm LLS-Ex 5 sensors are connected according to the schemes:
Run the Omnicomm Configurator program on your PC.
13
Setting

Omnicomm Configurator (PC):
Fuel level is displayed without regard for filtration.
14
Setting

“Empty/Full” Calibration
Perform the calibration in the fuel, in which the Omnicomm LLS-Ex 5 fuel level sensor will
operate.
1. Fill the measuring container with fuel
2. Immerse the Omnicomm LLS-Ex 5 sensor in the fuel to the full length of the
measuring probe
3. Wait for the green “Stabilized” indicator to appear.
Press “Full” to set the value corresponding to a full tank
4. Take the Omnicomm LLS-Ex 5 sensor out of the container and allow the fuel to flow
down the measuring piece for 1 minute. Press “Empty” to set the value corresponding
to an empty tank
5. Press the “Record into device” button
15
Setting

Omnicomm LLS-Ex 5 Sensor Settings
“Automatic adjustment” - enable to automatically correct the measurements when the
dielectric constant of the fuel changes. The setting is available only after the sensor has
been calibrated.
“Network address” (1 to 254) – set the network address for the Omnicomm LLS fuel level
sensor. When several sensors are connected to one external device, they should have
unique network addresses.
“Min level” (0 to 4095) – select the minimum reading for the Omnicomm LLS-Ex 5 fuel
level sensor. Default value – 0.
“Max level” (1 to 4095) – select the maximum reading for the Omnicomm LLS-Ex 5 fuel
level sensor. Default value – 4095.
“Filtering” – set the output signal filtration parameters:
“No”– no filtration. This option is used when the filtration is carried out by an external
device.
“Minimum”– filtration is used when the device is installed in stationary fuel storages
and non-mobile machinery
“Medium”– filtration is used when the vehicle operates under normal road conditions
“Maximum”– filtration is used when the vehicle operates under harsh road conditions
“Automatic data output” – select:
“Disabled” – no independent data output (without request) is performed
“Enabled” – independent binary data output
“Data output interval” (1 to 255 seconds) – set the automatic data output interval
The automatic data output mode may be used only with maximum one Omnicomm LLS
5 sensor connected to one interface.
“Heavy exploitation conditions” mode - switch on to enable additional filtration of
measurement values taking into account the rough working conditions.
“Parameters initialization” - displays the accuracy of the calibration results. Possible
options:
“Yes” - the calibration results are correct
“No” - sensor recalibration is required
16
Setting

“Baud rate” – select the rate for data exchange with external devices. Default value –
19,200 bit/s.
Installation and Connection
When installing the fuel level sensor onto the plastic fuel tank it is important to provide a
secure electrical connection between the sensor's body and the frame of the vehicle. If
this condition isn't met, it can lead to sensor malfunction caused by static electricity.
For installation onto cylindrical fuel tanks with the diameter 420...710 mm follow the
instructions in the section Fuel level sensor installation recommendations for cylindrical
fuel tanks.
1. Put the vendor furnished mounting point gasket on the Omnicomm LLS-Ex 5 sensor
measuring probe
2. Put the Omnicomm LLS-Ex 5 sensor into the tank and fix it:
when securing with bolts, first put on a spacer and a spring washer
when securing to a plastic tanks with a wall thickness over 3 mm, use vendor furnished
self-tapping screws
3. Connect the Omnicomm LLS sensors to an external device:
Omnicomm LLS-Ex 5 according to the scheme:
17
Installation and Connection

4. Connect the device and the BIS-MX unit using a KTZ-MX cable (where y is the length of
the cable, e.g. KTZ-10MX) manufactured by Omnicomm. The use of other mounting
cables, as well as the extension or reduction of the standard cables, is forbidden.
Pinout of the sensor connector:
18
Installation and Connection

Name of the signal Color of the wire
RS-485 A Orange-white
RS-485 B Blue-white
RS-232 Tx Pink
RS-232 Rx Gray
+V Power Brown
Ground White
19
Installation and Connection

Connecting the Omnicomm LLS-Ex 5 fuel level sensor to
an external device using BIS-MX
BIS-MX can connect up to two LLS-Ex 5 fuel level sensors to an external device. If only one
sensor is connected, put a cover on the empty connector.
Connect two Omnicomm LLS-Ex 5 fuel level sensors as shown in the diagram:
20
Installation and Connection