Fuel Level Sensor
EPSILON
Models ES2 and ES4
Service manual
2
Contents
1. USE ................................................................................................................................................... 5
2. EXPLOSION PROTECTION .............................................................................................................. 5
3. MAIN TECHNICAL CHARACTERISTICS ......................................................................................... 6
4. DELIVERY SET .................................................................................................................................. 8
4.1
Main delivery set
..................................................................................................................................... 8
4.2 Extra accessories ............................................................ Ошибка! Закладка не определена.
4.3 Consumables and tools for sensor's installation and calibration ...................................... 8
5. LIST OF DOCUMENTS AND SOFTWARE FOR SENSOR'S INSTALLATION AND CALIBRATION 9
6.
LIST OF DEVICES AND EQUIPMENT FOR SENSOR'S INSTALLATION AND CALIBRATION
.............. 9
6.1 Instrumentation ...................................................................................................................... 9
6.2 Equipment, tools and consumables
..........................................................................................................
9
7. STRUCTURE AND WORK OF SENSOR ......................................................................................... 10
7.1 Structure of FLS ................................................................................................................... 10
7.2 Work of FLS
.......................................................................................................................................................
11
8. INSTALLATION ............................................................................................................................... 13
8.1 Preparation of fuel tank for sensor's installation ............................................................... 13
8.2 Preparation of sensor for installation ................................................................................. 15
8.2.1
Measuring of probe's length ................................................................................ 15
8.2.2 Changing of probe's length
....................................................................................................
15
8.3 Installation of sensor on fuel tank....................................................................................... 17
8.4 Connection of sensor to control units ................................................................................ 17
8.5 Sealing of sensor ................................................................................................................. 20
9. CALIBRATION .............................................................................................................................. 20
10. MAINTENANCE ............................................................................................................................ 21
EPSILON ES2,ES4
3
11. TRANSPORTATION AND STORAGE ........................................................................................... 23
12. WARRANTY .................................................................................................................................. 23
Appendixes
1 SOFTWARE APPLICATION ES INSTALL ..................................................................................... 24
2 UNIFIED PROTOCOL EPSILON DATA EXCHANGE (EDE). ........................................................... 35
3 MEASURING HEAD MARKING. ...................................................................................................... 46
4 CONNECTION OF SENSORS ES2 AND ES4 TO CONCENTRATOR OF FUEL LEVEL SENSORS
«DALCON» .......................................................................................................................................... 47
5 CONNECTION OF SENSORS ES4 TO ONBOARD MONITORING CONTROLLERS OF
TRANSPORT SERIES «АВТОГРАФ-GSM» ........................................................................................ 48
6 CONNECTION OF SENSORS ES4 TO CONTROL UNIT OF MANAGEMENT SYSTEM OF
TRANSPORT NAVIGATION "TELETRACK" ....................................................................................... 50
7…CONNECTION OF SENSORS ES2 TO TRANSPORT MONITORING APPLIANCE "INTELLITRAC
A1" ....................................................................................................................................................... 51
8 CONNECTION OF SENSORS ES2 TO TRANSPORT MONITORING APPLIANCE TELTONIKA
MF4100(4200) -. .................................................................................................................................... 58
9 Connecting sensors to the subscriber terminal ES2……………………………….……….58
10 Connecting sensors to the subscriber terminal ES2……………………………….……….58
11
Using frequency output mode
……………………………….……………………………....67
4
Safety requirements on installation and maintenance of fuel level sensor
During installation of the fuel level sensor you should take organizational and technical
measures for ensuring safe work with instrumentation, accessories and consumables.
Responsibility for the implementation of security measures is imposed to technical personnel
that install the fuel level sensor, and to the staff that is responsible for the equipment of place
where the work will be performed.
At the place of work fire safety rules should be kept in accordance with GOST (Ukrainian: ГОСТ
12.1.004 "ССБТ. Fire Safety. General requirements", and rules of electrical safety in
accordance with ГОСТ 12.1.019" ССБТ. Electrical safety. General requirements. "
On motor transport at the place of work labour safety rules should be kept in accordance with:
ДНАОП 0.00-1.28-97 "Rules of safety on motor transport" (in Ukraine) or ПОТ РM 027-2003
"Inter-sectoral labour safety rules on motor transport» (in Russian Federation).
EPSILON ES2,ES4
5
1. Use
Fuel level sensor Epsilon (hereinafter referred to as the FLS or sensor) is used to measure the
fuel level in containers and fuel tanks (hereinafter - the tanks) of vehicles (hereinafter – the
vehicles).
The sensor can be used in conjunction with the equipment that supports a unified
communications protocol Epsilon Data Exchange (hereinafter - EDE) and (or) processing of the
analog signal.
The sensor is compatible with different control units, concentrators and equipment of GPS -
monitoring, such as follows:
Autograph
Ruptela
Dalcon
Pointer
Intellitrac
M2M Telematics
BCE
Teletrack
Teltonika… etc.
Model Epsilon ES2 provides data exchange on the interface RS-232, ES4 – on the interface
RS-485. The add-on device (digital to analog converter EG4x) ensures the formation of an
analog signal and exchange on the interface RS-485.
2. Explosion Protection
The sensor is explosion-protected and it has such explosion protection marking:
1Exm[ia]IICT6 Х - for use in Russian Federation.
1ExsiaIICT6 X - for use in Ukraine;
The sign "X" in the marking of explosion protection shows special conditions of safe use of
sensors as follows:
sensors should be connected to the electrical circuits of equipment that feeds only from the car
battery with voltage not more than 36 V and has no electrical connections with electrical
equipment that has other sources of supply, including the network ones;
connection of sensors to the mains supply should be carried out via a fuse rated at no more
than 0.1 A.
Documents confirming compliance of the sensor with the requirements of explosion protection:
Certificate of conformity of the Russian Federation State Standard № РОСС.UA.ME92.B02278
and certificate № 2703 of the State Testing and Certification Center of Explosion-Protected and
Mine Electrical Equipment (Donetsk, Ukraine).
6
3. Main Technical Characteristics
Table 1.
Name of characteristic or parameter Units Value Notes
General
Accepted values of electrical conductivity of
controlled fuel, not more
Cm/
m
10
-8
1
Limit range of operating temperature
0
С – 40 … + 75
Climatic range
1.1
ГОСТ15150-69
Degree of protection
IP56
Measurement
Range of measured values of level of
controlled fuel
mm
from 10 to 800
2,3,4
from 800 to
3000
Resolution of measurement of diesel fuel
level in static mode, not worse
mm
0,05
5
Basic permissible error in level measuring in
static mode, no more
mm
0,5
6
The period of measurement results averaging
in a dynamic mode
s 8
Bit code representation of measurement
results
bit
10/12/16
Level (8)
8
Temperature
Supply
Voltage supply, operating range V
+8
-10%
÷
+36
+20%
Rated
Current consumption мА
5,5±0,5
with 12V
2,5±0,2
with 24V
Operating mode
Long-term
Permissible effect of pulsed voltage supply to
circuits
+ 160В, 1с
-1000V
8
Interface
Digital
RS-485
Model ES4
RS-232
Model ES2
Analog (using a digital-analog converters
EG-41 (8 bits)
EG-42 (12 bits)
мВ
25…3175 9
25…4000 9
Accession size, weight
EPSILON ES2,ES4
7
Kind of bumper ring
5 holes.
4.5mm
10
Type of probe’s thread M25х1,5
Height of measuring head above surface of
tank, including bumper ring, no more
mm 29
11, 12
Weight, no more g 250
12
Notes for table 1:
1. Allows you to measure different sorts of fuel with high electrical conductivity (which
contain anti-electrostatic additives).
2. The position of the upper (maximum) value of the measured level corresponds to the upper
edge of the drain hole of the probe.
3. Version of more than 800 mm is carried out to an additional order.
4. For version of "0800" (800 mm) it is allowed to shorten the probe "at the time of execution"
without restrictions on the minimum length.
5. During use of 16 bits representation of measurement results.
6. For a version of "0800" in the normal climatic conditions in accordance with ГОСТ15150-
69. In order to ensure a given accuracy in all working range of temperatures, the
adjustment of the calibration table should be applying (according to the temperature
dependence of the dielectric permeability of fuel).
It is also possible to adjust the calibration table with use of fuel with a dielectric permeability
different from the dielectric permeability of fuel which was used for calibration.
When testing the fuel with the same dielectric permeability as of the fuel used for calibration.
To ensure measurements with other sorts of fuel the adjustment of calibration table should
be used (according to dielectric permeability of the sort of fuel).
7. Data are given into two formats: 16 and 10/12 bits. Capacity of 10 or 12 bits is switched
according to the program. 12 bits value is set by default.
8. Pulse parameters in accordance to ГОСТ 28751-90 (product of A class, the degree of
severity 3 for 24V on-board power use).
9. With use of an additional inverter EG41 (42) U-mode or I – mode are possible. The
maximum output voltage Umax = U Power is 4 (V).
10. Other versions of conjunctive flange are possible after coordination with the customer.
11. Sealing gasket is not included.
12. For the indicated version of flange.
8
4. Delivery set
4.1 Main delivery set
Table.2
Name Decimal number Quantity
Notes
1 Measuring head ES.100 1
2 Probe ES.200 1
3 Connecting cable ES.300 1
4 Flange ES.001 1
5 Cap ES.002 1
6 Self-drilling screw ES.004 1 With a hole for
sealing
7 Self-drilling screw 9Т64219-2 4
8 Gasket 5320-382713 1
9 Passport ES.402 ПС 1
10 Indicator’s seal SILTECH 2 With wire for
sealing
11 ZIP String
1
4.2
Extra Accessories
Table 3.
Name Decimal number
Notes
1) Service manual ES.401 RE
2) Compact disk CD-R ES.000 CD1 With program "eS Install" for
sensor’s setting
3) Cap М25х1.5 Installed on the tank after
removal of the sensor
4) Plug IEC ES.002.0 Installed on the tank after
removal of measuring head
5) Fuse 0,1А 250V Ø5х20 mm, high-speed
EPSILON ES2,ES4
9
4.3 Сonsumables and tools for sensor’s installation and calibration
Consumables and tools for sensor’s installation and calibration can be supplied on special
request (see section 6).
5. LIST OF DOCUMENTS AND SOFTWARE FOR SENSOR’S
INSTALLATION AND CALIBRATION
● Passport ES.402 ПС.
● Service manual* ES.401 РЭ.
● User’s software on CD disk** ES.000 CD1
* - 1 manual with 10 sensors is supplied
** - supplied on special request
6. LIST OF DEVICES AND EQUIPMENT FOR SENSOR’S
INSTALLATION AND CALIBRATION
6.1
Instrumentation
Table.4
Name Quantity
1) Multimeter M890G 1
2) Tape measure 3 m
1
3) Measuring cup or flow meter, providing measuring errors of fuel
volume not worse than ± 0,1%
1
6.2 Equipment, tools and consumables
Table.5
Name Quantity
1) Metal cutting tool for holes making Ø22 ± 0,5 mm in the
sheet material of the tank surface. Preferably produced by RUKO:
a. For hydraulic hole punching:
a set 5 hydraulic, article 109 009,
b. For drilling:
carbide crown drill Ø22, article 105 022.
1 set
2) Electric drill with holder of clamping of the tool shank with
diameter NLT 10 mm.
1
3) The network extender in polyurethane insulation, 220V, 4А.
1
4) Pipe cutter is used when necessary to reduce the length of the 1
10
probe (preferably produced by ROTHENBERGER company:
"MINIKAT II PRO", Art. 7.0402 or similar).
5) Spanner with 7 mm gap amount. 1
6) Spanner with 36 mm gap amount (can be ordered at your
sensor provider). Note for order IEC ES.002.0.
1
7) Special spanner for probe (can be ordered at your sensor
supplier).
Note for order IEC ES.003.0.
1
8) Auto Sealant Loctite 5900. 0,1 ml
9) Laptop (PC), minimum requirements: Pentium 500 MHz, 64 MB
RAM, MS Windows 98/2000/XP, MS Office not higher than 2003,
not less than 10MB of free hard disk space, the manipulator
"mouse", a free USB-port.
1
10) Adapter for connecting of the sensor eS2 to the PC
1
11) The converter USB/RS-485 model MOXA UPort 1130 (for
calibration of the tank with the sensor eS4).
1
12) The converter USB/RS-232 model MOXA UPort 1110 (for the
calibration of the tank with the sensor eS2).
1
7. Structure and work of sensor
7.1
Structure of FLS
The measuring head of the sensor (Pic. 7.1) consists of a level converter, a digital circuit of
signal processing, the device of data exchange, the voltage balancer and circuit which provides
necessary protection for input and output circuits.
Connection to external devices is providing with help of interface cable.
EPSILON ES2,ES4
11
Pic. 7.1 The general view of the “Epsilon” FLS
Measuring of fuel level is made with help of measuring head with the probe, immersed into the
fuel. The probe is a coaxial capacitor, which is made of an aluminum tube (external electrode)
and insulated copper string (internal electrode). The required tension of the string is supported
by a spring which is situated in contact of the probe’s connector.
Mounting of the sensor is performed with help of self-drilling screws, which fix the sensor’s
flange on the tank. Impermeability of the fit of measuring head is provided by sealing ring,
located in the front groove.
The interface cable is protected from mechanical damage by a flexible metal sleeve or
corrugated pipe.
The sensor safety is provided by such facilities:
fuse for protection against overloads and short circuits;
intrinsically safe measuring circuit with normalized values of voltage, inductance,
capacitance and resistance;
multi-level protection of charging and interface circuits;
metal sheath with a proper degree of protection (IP56 according to ГОСТ14254);
compound filling of the measuring head’s membrane.
7.2 Work of FLS
The sensor’s probe during the immersing into fuel perform the function of a variable capacitor
whose capacitance linearly depends on the level of it’s filling by fuel.
The measuring head of the sensor performs a linear transformation of the probe’s capacitance
to digital code of fuel level, the processing of received digital data with averaging of
measurement results, taking the temperature of the fuel tank and delivery of the data in a
Measurement head
Hermetic cable input
Interface cable
Sealing rubber ring
Flange
Gasket
Zonde
Plug
Cap of Plug
12
unified protocol EDE of bus RS- 485 or RS-232 or in an analog signal (only the level),
depending on the model.
Data about fuel level may be issued in the form of 10-, 12-or 16-bits value, the temperature data
- in the form of 8-bits value.
For determination of the amount of controlled fuel the procedure of calibration of fuel tank
should be carried out. During this procedure the dependence between the amount of fuel and its
level, measured by sensor (by the code of the level), is set.
Controlling of the calibration procedure and setting of parameters of data exchange with the
help of eS Install program are described in details in Appendix 1.
Protocol of data exchange EDE is shown in Appendix 3.
EPSILON ES2,ES4
13
8. Installation
8.1 Preparation of fuel tank for sensor’s installation
The sensor is installed in the center of the fuel tank, as shown on Pic 8.1.
Only in this case, when vehicle is inclined, during acceleration or deceleration the fuel level at
the measuring point is the least volatile for fluctuations. The measuring probe should be set
vertically down. Improper installation of the probe may be the reason of accuracy loss in
determining of fuel amount.
If the top of tank is difficult to access, it is necessary to remove the tank from the vehicle for
proper installation of the sensor.
.
Pic. 8.1 Proper position of sensor on fuel tank
It is necessary to clean the fuel tank in the place of sensor’s installation.
!
WARNING! Before sensor’s installation on the tank, firstly you should fill
it with water or drain fuel and oil lubricants and clean the tank to the
complete removal of flammable liquids and vapors.
To ensure proper position of the sensor cable entry of the sensor and preparation of making the
procedure of sealing, we recommend following steps:
Determine the optimal orientation of the sensor. Cable entry of the sensor and the direction
of the interface cable should be oriented to the side of stowage and setting of connecting
cable on the car body.
Mark on the tank the position of flange holes and position of cable entry.
Set the flange on the sensor.
14
Drill or punch a central hole Ø22 and put the sensor with a flange into it.
Drill in the tank body 5 holes for flange setting (it is possible to make holes by self-drilling
screws). Example of holes drilling for self-drilling screws installation is the flange ES.001,
shown in Pic. 8.2. This picture also shows the reference sizes of flange setting.
Pic. 8.2 Size and method of flange setting on fuel tank
Remove the sensor with flange.
!
WARNING!
You must remove the chip from drilling of the holes, and
also make sure that there are no foreign objects and trash on the tank
bottom.
Lubricate both sides of the gasket 5320-382713 and self-drilling screws with sealant. The
type of sealant is shown in Table 5.
Set the flange ES.001 and gasket to the prepared surface of the fuel tank with help of a self-
drilling screw ES.004 (with an extra hole, provided for sealing). The screw should be placed
on the right side from the cable input, as shown in Picture 8.3.
Fix the flange with four self-drilling screws 9Т64219-2.
Pic. 8.3 Position of screw with a hole for sealing
EPSILON ES2,ES4
15
8.2 Preparation of sensor for installation
8.2.1 Measuring of probe’s length
It is strongly recommended, whenever possible, to apply probes unified by a manufacturer - this
will eliminate extra work during installation or replacement of the sensor. As a rule, unified
sensors correspond to the outer height of tanks of the most encountered sizes. For example,
the overall height of the tank of trucks of such popular brands as DAF, MAN, Renault, Scania is
620 mm – the sensor with a probe of 620 mm should be applied for them.
The manufacturer of the sensor provides the following range of unified types of sensors.
Table 6.
Probe’s length* Typical models of vehicles
800 Special machinery
620 Truck tractors DAF, IVECO, MAN, Mercedes-Benz,
Renault, Scania and others, machinery on their
base.
530 Trucks КАМАЗ, КрАЗ, machinery on their base.
440 Trucks МАЗ, machinery on their base
350 Trucks ЗИЛ
260 Light trucks and vans
*
corresponds to outer height of tank, mm, in place of sensor’s installation)
Type of the probe is indicated in the description of the sensor at the time of ordering.
In case of absence of type, as a rule, the length of delivering probe is 770 mm.
Description of measuring head and the index correspondence in the description of probe’s
length are shown in Appendix 3.
8.2.1 Changing of probe’s length
If there is no necessary length in the range of unified types, you will have to cut the unified
probe by yourself on the spot. To do this, you should measure the depth of the fuel tank L, as
shown on Pic. 8.4, then measure the length on the probe (L-15) mm, to ensure the gap of 10
mm between the probe and the bottom of the tank during the sensor use.
!
WARNING! For tanks with a lack of stiffness (for example - plastic
tanks of considerable height) it is recommended to increase the gap
between the probe and the bottom of the tank up to 30 mm. This is
due to changes of sizes of the tank because of changing of
temperature, poured fuel mass, and deformation during the motion.
16
Pic. 8.4 Determining of measuring probe’s length
Next:
1) Cut the meted part of the probe’s tube. The cut must be made carefully, burrs must be
removed. The plane of the cut should be perpendicular to the guide line of the pipe. We
recommend using a special tool for cutting pipes. Type of the instrument is listed in Table 5.
2) Install an insulating cap ES.217 at the end of the probe, as shown on Picture 8.5, on the left:
Pic. 8.5 Method of fastening of string on the end of probe
3) Fix the central conductor of the probe. To do this, you should pull up to the stop (the length
of free movement of compressing spring 5 mm), fold and put the central conductor to the
grooves of stub, as shown on Pictures 8.5 and 8.6.
Pic. 8.6 Way of placement of central conductor on the stub
4) Check the quality of the tension. To do this, you should gently tap with your finger on the
probe (probe should be screwed to the measuring head against the stop) – you should feel the
vibration of the string taut (central conductor).
Cut the remained part of the conductor in the way that the cut was roughly in the center of a
stub.
5) Apply a drop of sealant (type shown in Table 5) on the place of conductor’s cut for providing
protection of the end of the conductor from water that may accumulate in the tank.
EPSILON ES2,ES4
17
Install the plug on the cap, shown in Picture 8.5, on the right, and push until it clicks.
Preparation of the sensor for installation is complete. If the sensor is supplied with a probe of
unified or special length, the sensor assembly and preparation for installation is performed in
factory conditions.
8.3 Sensor’s installation on fuel tank
The sensor is screwed into the threaded hole of the flange as it shown in Pic. 8.7. Tightness of
connection is ensured by a sealing ring located in the front groove of the measuring head.
Before installing the sensor it is recommended to put a thin layer of grease or engine oil to the
ring.
Pic. 8.7 Installation of assembled sensor on fuel tank
8.4 Connection of sensor to control units
To connect the sensor to different control units, concentrators and equipment of GPS monitoring it is recommended to use the original sensor’s cable system, which consists of an
interface cable ES.120 (0.45 m) and a connecting cable ES.300 (7,5 m).
The interface cable is connected to the measuring head of the sensor with help of permanent
connection and ends with slot M (6188-0442) (plug, set).
Connecting cable is supplied with the sensor. It begins with slot F (6189-0656) (socket, set) and
ends with four pressed wires, which should be connected to the appropriate type of the input
connector of a device.
Scheme of connection of interface and connecting cables and the wires description as well are
shown in Pic. 8.8.
!
WARNING! Do not twist the cable entry or otherwise violate the integrity
of the measuring head from the input of interface cable.
The connecting cable is stretched from the sensor which installed on the fuel tank, to the control
unit, that is usually located in the driver’s cab through the technologic holes, provided by the
construction of a vehicle. The cable is fixed with ties on immovable parts of the construction
every 50-60 cm.
Rubber sealing ring
18
Pic. 8.8 Scheme of connection of interface and connecting cables
Additional instructions of connecting of the sensor to different control units, concentrators and
equipment of GPS - monitoring are in the appendixes of this Manual:
- for "Dalcon" concentrator – Appendix 4
- for "АвтоГРАФ –GSM" system – Appendix 5
- for "Teletrack" system – Appendix 6
- for "IntelliTrac" system – Appendix 7
- for "Teltonika" system – Appendix 8
Common earth conductors of the sensor (black wire) and of a control unit must be connected to
a single point on the chassis of a vehicle, to which "mass" or "earth" of the other electrical
appliances of a vehicle are connected (Pic. 8.9).
ДУТ
БУ
-
Выключатель
массы
1
2
...
n
Электроприборы ТС
+
Pic. 8.9 CORRECT connection of common wire
Interface cable Connecting cable
Yellow
Green
Red
Blac
k
embedded networ
k
general
ES4 ES2
Channel A (RS485) Rx(RS232 output 2 DB9)
Channel B (RS485) Tx(RS232 output 3 DB9)
ES4 ES2
Channel B (RS485) Tx(RS232 output 3 DB9)
Channel A (RS485) Rx(RS232 output 2 DB9)
FLS
Disconnect
Switcher
Electrical appliances of a vehicle
Control
block
EPSILON ES2,ES4
19
!
If there is a disconnect switcher on a vehicle, for prevention of the
fuel level sensor (FLS) EPSILON failure and a control unit (CU) it is
strictly forbidden to connect the common (black) power wire of the
sensor in the area between the battery and disconnect switcher!
(Pic.8.10)
Pic. 8.10 INCORRECT connection of common wire.
The resistance between the body of installed sensor and the point of connection of its common
wire to the "mass" should not exceed 0.5 Ohms. In any case, the total resistance of the earth
wires from the sensor to the control unit should not exceed 0.5 Ohms.
During installation of the sensor to the vehicle with switched "mass" and necessity to save
functionality when ”mass” is switched off, additionally a galvanic isolated voltage stabilizer or
other galvanic power supply is set (Pic.8.11).
ДУТ
БУ
-
Выключатель
массы
1
2
...
n
Электроприборы ТС
+
Гальвани-
ческая
развязка
питания
+
Pic. 8.11 Installation of sensor on vehicle if it is necessary to save functionality when ”mass” is
switched off.
FLS
Control
Block
Disconnect
Switcher
Disconnect
Switcher
common
common
black
FLS
Control
Unit
Galvanic
Power
Supply
20
8.5 Sealing of sensor
To protect the sensor from unauthorized interference you should install two seals. The first
seal prevents the measuring head from twisting and the second one is set on a detachable
connection of interface and connecting cables.
For sealing of the measuring head (look pic. 8.12):
make a wire loop;
tightly wrap the hermetic input;
make a twist of wire and thread the wire through the hole of the screw ES.004;
place the ends of the wire in the seal (using СИЛТЕК seal ends of the wire should go
through the holes of the seal on the side opposite to marking);
Select the wire slack and snap the seal.
Pic. 8.12 Method of sealing of the installed fuel level sensor
For additional mechanical fixation of the seal we recommend to drag it to hermetic output and
press with a plastic electro technical clamp tie.
9. Calibration
To ensure the most accurate control of fuel level, tank calibration is performed - initially empty
(full) tank is filled (merged) by equal portions of fuel and with the help of special software "eS
Install" the sensors statements are measured and fixed after adding (pluming) of each portion.
Portion sizes should be chosen depending on configuration of a tank: if horizontal crosssectional area of the tank in height is sharply changing the portion should be the less. (For
example, the recommended portion for a 500 l tank of КамАЗ should be 10 l).
You must also take into account the time of level balancing level in tanks of complex
configuration (for example, in 2-tank systems) due the fuel flow.
Requirements to a measuring cup or a flow meter that provides a measurement of portions are
shown in Table 4.
EPSILON ES2,ES4
21
!
WARNING!
Calibration of the tank must be made using the same type of fuel,
with which the sensor will be operating (for example, you can not use petrol
for calibration, if you intend to operate with diesel fuel).
To achieve the most accurate operating features of the sensor it is desirable to make “training”.
It is sufficient to perform the calibration procedure not immediately after installation of a sensor,
but after some time of car’s usage, when 50 – 70% of tank’s fuel capacity is used. During this
time, mechanical clearances will normalize, guaranteed by the rubber gasket flange and a
polymer sealant, and on the entire surface of the probe a stable dielectric fuel film is formed.
If the "training" of the sensor can not be performed, before the calibration of the tank by filling it
with use of a new sensor (probe), the probe must be immersed into the fuel than removed and
you should allow the fuel to drain for 20-30 minutes. If the calibration is performed by the
method of draining, this procedure is not performed.
At the time of calibration you must disconnect the sensor from the on-board controller and
connect it to the port of used PC (requirement to PC and port converter are shown in Table 5).
At the end of calibration a connection to the on-board controller should be restored.
The result of calibration in the form of tank calibration table and user’s data about work
executed is storing on the PC in a format which guarantees the data exchange into Dispatch
Software. Detailed procedure of calibration using software application eS Install is described in
Appendix 1.
10. Maintenance
The sensor is unattended product, but if the rules of vehicle maintenance provide the procedure
of fuel tank prevention; it is advisable to execute simultaneously preventive service of the
sensor.
For sensor’s preventive service you have to:
Perform a complete removal of the sensor (see Pic.10.2);
Wash the probe from inside by the fuel (in which sensor is operating) and blow with
compressed air.
Check own parameters of the measuring head (by using "eS Install").
Perform installation and sealing of the sensor according to the requirements of section 8.
Measuring head of the sensor is not repairable product and during the warranty period
preserves the stability of its metrological parameters.
In the case of failure of the measuring head you must perform the following:
If you want to use vehicle before a new measuring head is installed, it is necessary to make
a partial removal of the sensor (see Pic. 10.1).
Loading...