RS232 / RS485 / Analog transmission Capacitor Oil Level Sensor
Examination area: 100~1000mm
resolution ratio: 0.1%
Measuring accuracy:0.1%
Maximal error of measure :1mm
heat-resistant :-40~150
Diameter Φ18mm
Output signal :4~20mA,0~5V, RS485, RS232, CAN bus
Voltage supply :DC7~42V
Rated supply :0.1W
Fixed type :Screw installation M20X1.5 OR Flange mounting
Pressure range :-0.1MPa ~ 0.1 MPa
ambient temperature -40~85℃
2.Instructions
2.1 definition of the output line
Interface output line use 6 core cable, connecting definition:
0~5V output [CA-201A]:
Black line connect ground wire
Red line connect positive power
White line 0~5V voltage signal output,connect voltage signal wire
Yellow line empty fuel tank use only
Green line full fuel tank use only
4~20 mA output [CA-201B]:
Black line connect ground wire
Red line connect positive power
White line 4~20mA ampere signal out put,connect ampere signal line
Yellow line empty fuel tank use only
Green line full fuel tank use only
RS232 output [CA-201C]:
Black line connect ground wire
Red line connect positive power
White line RXD input, connect car RS232 TXD
Blue line TXD output, connect car RS232 RXD
Yellow line empty fuel tank use only
Green line full fuel tank use only
RS485output mode(CA-201D)
Black line connect to CND
red line connect to VDD
white line connect to RS485 A
blue line connect to RS485 B
yellow line marking for empty fuel tank
green line marking for full fuel tank
2.2 Calibration
This sensor adopt high-speed MCU of CNC technology, adopting
self-calibration
Calculation , and leaves out the complicated Manual calibration
while using. in normal
circumstance, the sensor can directly be used in the measurement of
the diesel, if need to calibration, you can use the three following
ways to complete. (each can work)
1.self-calibration: put the sensor slowly into the The tested
medium while power on, let the liquid get into the feed inlet
slowly ,stoping when the liquid is overflew the vent hole of the
sensor. and this operation accomplish the calibration of the sensor
. In order to prevent the failure of the calibration process ,
please do this process for at least 2 times .( notice:This way is
under the condition of powering on , outage restart will restore
the factory Settings.In the condition of empty fuel tank,refueling
to full, the sensor itself are also able to complete the
self-calibration )
3.Notice
1.Only one signal can exist among RS232/ RS485/ 0-5V/ 4~20mA, and
you can use either one of them. The trunk of RS485 can meet
multiple sensors at the same time, but you should set the address
of each sensor in advance. Address of each sensor must be unique,
in case the trunk is locked. RS485 trunk is made of half-duplex
chips, so when it reading data, you should set aside the
corresponding time for the module. The reading speed cannot be too
fast: when it reads continuously, the time interval between the two
instructions cannot be less than five seconds.
2.For the signal transmission line, especially the one of
RS232,communications circuits should not be too long, and should
use the shielded wire.
3. For the sensors of the signal RS232/ RS485, when debugging the
failure of communication, you can exchange the white line and the
blue one and test again. If it works then, it is the connection
error before. The operation is only for digital communications.
4. The power supply voltage of sensor cannot be more than the
normal working voltage, and the power consumption of the sensor’s
power supply cannot be less than the normal working power
consumption.
5. The actual environment should conform to the requirements of the
basic parameters of sensors, and shall not exceed the normal range,
or it would damage the sensor, even cause other accidents.
6. On account of oil products, there are differences between the
mediums of the calibration and use, users had better operate
according to 2.2.2.
7. Do not remove sensors or damage it maliciously, or we do not
guarantee it.
8.General factory accessories include Flange, rubber blanket,
O-Rings, booklet of instruction, certificate of conformity. If you
have special needs, please tell us in advance.
9.Guarantee period of the sensor is one year. All accessories
including rubber blanket, O-Rings, are beyond the scope of “
threeguarantees ”.
Symptom of failure
1No-output /communication error
2The output value unchanged
3Measurement error of output value
4Output value floats up or down
cause analysis
1 Open circuit of the power or voltage too low
Sensor fault
Wrong connection of the lines and wires
2 service voltage abnormal
external interference
Sensor jammed
Sensor fault
3 service voltage abnormal
external interference
Sensor jammed
autoadaptation uncomplete
Sensor fault
4 oil level flow
service voltage abnormal
external interference
Sensor fault
Exclusion and solutions
1test connect→test if the voltage is greater than 10V when
load→test the supply current [range 3~10mA] → connect method see
2.1,or change over blue and white line[digital communication
only]→if all above is regular or current beyond normal range,the
sensor occurred failure.
2Test the supply voltage when load[ex.voltage unstable] → recharge
the sensor →test if there is a serious interference around→test
whether sensors hole is blockage from top to bottom → execute
2.2.2→If not,the sensor occurred failure.
3 detect whether service voltage is stable while loading ( if the
voltage is unstable) → →whether external have interference→check
whether the sensor is jammed → execute the 2.2.2 process →then it
should be the sensor fault
4 check the oil leve is stable → check the service is normal and
functional →whether external have interference →execute the 2.2.2
process→then it should be the sensor fault
remark
1 4~20mA output supply voltage DC20~28V,current is 4~20mA except
communication output
2Check the tank oil level is float or not,if become regular after
recharge,check the interference and the power
3 it usually can be functional while executing the 2.2.2 process
4 it usually occur on 0~5V signal
APPLICATION:
The ultrasonic fuel level sensor is used for digital recording
vehicle refueling, to prevent driver stealing oil , avoid the waste
of resources, improve operational efficiency, and improve the
traffic safety, strengthen the operation and management level.
This sensor is applicable to various types of vehicles such as
trailers, taxis, buses, concrete mixer truck, engineering
machinery, sanitation trucks and other.
Gurantee:
1. All of our product is free to use the Tracking service server in
24 hours each day
2. All of our product there is a 2 year quanlity assurance.
3. Sample fee will not be returned.
Product Configuration:
1. Standard configuration
1) main device 1 pcs
2) power line 1 pcs
3) sensor
5) Installation cables 1 set
6) Usage instructions
7) Warranty card
