Long-run LRF-3000S User manual

LRF-3000S Ultrasonic Transit-time Flow meter
Revision：1.0.0
UpdateRecord：October,2018

LRF-3000S Ultrasonic Transit-time Flow meter
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Notice
Thank you for choosing the LRF-3000S Ultrasonic Flow meter.
Place read the instruction manual carefully before you use the flow meter to avoiding the damage to the flow
meter or improper use.
Warning
May cause injury.
Attention
May damage the flow meter.
Some of the instructions may be different to the flow meters you purchased, depending on configuration
requirements, otherwise, there is no indication about the product design and upgrade requirement in the
instructions, please refer to the version number, as well as the appendix.

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Content
1. Product Overview............................................................................................................................................-4-
1.1. Introduction......................................................................................................................................-4-
1.2. Features of LRF-3000S....................................................................................................................-4-
1.3. Theory of Operation.........................................................................................................................-4-
1.4. Specifications.................................................................................................................................- 5 -
2. Connection.....................................................................................................................................................- 6 -
2.1. Wire Connecting............................................................................................................................- 6 -
2.1.1. Power supply option ..............................................................................................................- 6 -
2.1.2. Transmitter Wiring.................................................................................................................- 6 -
2.2. Powering on...................................................................................................................................- 7 -
2.3. Keypad Functions..........................................................................................................................- 8 -
2.4. Keypad Operation............................................................................................................................-8-
3. Quick start..............................................................................................................................................- 9 -
3.1. Basic settings.................................................................................................................................- 9 -
3.2. Measurement Site Selection.........................................................................................................- 10 -
4. Transducer Installation ........................................................................................................................- 13 -
4.1. Transducer Installation.................................................................................................................- 13 -
4.1.1. Transducer Spacing..............................................................................................................- 13 -
1.1.2 Transducer Mounting Methods............................................................................................- 13 -
4.1.3. V Method.............................................................................................................................- 13 -
4.1.4. Z Method .............................................................................................................................- 14 -
4.2. Transducer Mounting Inspection.................................................................................................- 14 -
4.2.1. Signal Strength.....................................................................................................................- 15 -
4.2.2. Signal Quality (Q value)......................................................................................................- 15 -
4.2.3. Total Time and Delta Time ..................................................................................................- 15 -
4.2.4. Transit Time Ratio ...............................................................................................................- 15 -
4.2.5. Warnings..............................................................................................................................- 16 -
5. Operating Instructions .........................................................................................................................- 17 -
5.1. System Normal Identification......................................................................................................- 17 -
5.2. Low Flow Cutoff Value ...............................................................................................................- 17 -
5.3. Zero Settings................................................................................................................................- 17 -
5.4. Scale Factor .................................................................................................................................- 17 -
5.5. System Lock ................................................................................................................................- 18 -
5.6. 4 ~ 20mA Current Loop Output...................................................................................................- 18 -

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5.7. Frequency Output ........................................................................................................................- 18 -
5.8. Totalizer Pulse Output .................................................................................................................- 19 -
5.9. Alarm Programming....................................................................................................................- 19 -
5.10. 4-20mAAnalog Output Calibration.............................................................................................- 19 -
5.11. SD Card Operation ......................................................................................................................- 20 -
5.1.1. Specifications.......................................................................................................................- 20 -
5.1.2. Install or Remove the SD card while the meter is powered on............................................- 20 -
5.1.3. ESN......................................................................................................................................- 21 -
6. Windows Display Explanations...................................................................................................................- 22 -
6.1. Windows Display Codes..............................................................................................................- 22 -
6.2. Display Explanations...................................................................................................................- 24 -
7. Error Diagnoses...........................................................................................................................................- 44 -
7.1. Table 1. Error Codes and Solutions (during operation)...............................................................- 44 -
7.2. FrequentlyAsked Questions andAnswers...................................................................................- 45 -
8. Appendix3 –Serial Interface Network Use and Communications Protocol................................................- 46 -
8.1. Overview......................................................................................................................................- 46 -
8.2. Serial port definitions...................................................................................................................- 46 -
8.3. Direct connection via RS232 to the host device..........................................................................- 47 -
8.4. Communications protocol and the use.........................................................................................- 47 -
8.4.1. HL Protocol..........................................................................................................................- 47 -
8.4.2. MODBUS-I Communication Protocol.................................................................................- 49 -
9. Appendix6 - Flow Application Data..............................................................................................................-55-
9.1. Sound Velocity for Various Materials Commonly Used................................................................-55-
9.2. Sound Velocity in Water (1 atm) at different temperatures..........................................................- 56 -
Update Information:
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LRF-3000S Ultrasonic Transit-time Flow meter
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1.Product Overview
1.1. Introduction
LRF-3000S is a wall-mount, clamp- on type ultrasonic flow meter which uses the transfer time technology. Clamp
on type ultrasonic flow meter is easy to install and no need to cut off the pipe that saves you lots of troubles and
cost. At the same time LRF-3000S has our unique calculate software to ensure the high accuracy and low velocity
response.
LRF-3000S ultrasonic flow meter widely application in oil industry, water treatment, pure water, chemical and
etc.
LRF-3000S could add the RTD model and temperature sensor become an energy meter to monitoring the energy
use, help to save the energy.
1.2. Features of LRF-3000S
Comparing With other traditional flow meter or ultrasonic flow meter, it has distinctive features such as high
precision, high reliability, high capability and low cost, the Flow meter features other advantages:
1. With ARM COMA chip, low power consumption, high reliability, anti-jamming and outstanding benefits.
2. User-friendly menu designed. Parameters of pipe range, pipe material, pipe wall thickness, output signals, etc
can be conveniently entered via the windows. British and Metric measurement units are available.
3. Daily, monthly and yearly totalized flow: Totalized flow for the last 64 days and months as well as for the
last 6 years are may be viewed. With the SD Card, 512 files can be stored; the time interval can be within 1
second.
4. Parallel operation of positive, negative and net flow totalizer with scale factor and 7 digit display. Internally
configured batch controller makes batch control convenient.
The flow meter ensures the higher resolution and wider measuring range by the 0.04ns high resolution, high
linearity and high stability time measuring circuit and 32 bits digits processing program.
1.3. Theory of Operation
When the ultrasonic signal is transmitted through the flowing liquid, there will be a difference between the
upstream and downstream transit time ( travel time or time of flight ), which is proportional to flow velocity,
according to the formula below.
downup TT TMD
V•

=
 2sin
Remarks:
V Medium Velocity
MUltrasonic frequency of reflection
DPipe Diameter
θThe angle between the ultrasonic signal and the flow
Tup Transit time in the forward direction
Tdown Transit time in the reverse direction
ΔT = Tup –Tdo
Downstream Transducer
Upstream Transducer
Flow D
T down
T up

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1.4. Specifications
Performance specifications
Flow Rage
0 ft/s ~ ±40 ft/s ( 0 m/s ~ ±12 m/s ).
Accuracy
± 1.0% of measured value.
Repeatability
0.2%.
Pipe Size
1″ ~ 48″ ( 25 mm ~ 1200 mm ).
Function Specifications
Output
Analog output: 0/4 ~ 20 mA, ( max load 750 Ω );
Pulse output: 0 ~ 9999 Hz, OCT ( min. and max. frequency is adjustable );
Relay output: max. Frequency 1Hz (1A@125VAC or 2A@30VDC ).
Communication
Interface
RS232 & RS485.
SD Card
( Option )
Max record: 512 days.
Record time interval: 1 ~ 3600 s.
Power Supply
10 ~ 36 VDC/AC90~245V.
Keypad
16 light tactile keys.
Display
240*128 lattice, backlit LCD.
Temperature
Transmitter: -40°F ~ 140 °F (- 40℃~ 60℃).
Transducer: -40 °F ~ 176 °F ( - 40 ℃~ 80 ℃, standard ).
Humidity
Up to 0 ~ 99% RH, non - condensing.
Physical specifications
Transmitter
PC/ABS, IP65.
Transducer
Encapsulated design.
Standard / Maximum cable length: 30 ft / 1000 ft ( 9m / 305 m ).
Weight
20*22*23.5cm, 3.2kg

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2. Connection
2.1. Wire Connecting
2.1.1. Power supply option
Customers should pay special attention to specify the desired power supply when wiring.
Factory standard power supply is 10~36VDC/1A max.
To ensure the transmitter can work normally, please pay attention to the followings when wiring:
Ensure that power connections are made in accordance with the specifications shown on the transmitter.
2.1.2. Transmitter Wiring
Once the electronics enclosure has been installed, the flow meter wiring can be connected.
Open the case, you will find the Power board wiring ports, from left to right, are as follows;
Connect to power supplier, Relay Output, OCT Output, Transducer wiring, 4-20mA Output, RS232 Output,
RS485 Output,Analog Input.
For double-shielded transducer cable: "-" on the Blue wire, "+" on the Brown wire and "shield" on the Black
shield wire.
Refer to the below form for specific connection:
Sign
Description
L
AC Power AC90～245V
N
Grounding
DC+
DC Power DC10～36V +
DC-
DC Power DC10～36V -
RL OUT+
Relay Output
RL OUT-
GND
Upstream sensor Grounding Black
UP+
Upstream sensor + Brown
UP-
Upstream sensor - Blue
GND
Downstream sensor Grounding Black
DN+
Downstream sensor + Brown

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DN-
Downstream sensor - Blue
OCT OUT+
OCT Output
OCT OUT-
I OUT+
40~20mA Output
I OUT-
AI1
Analog Signal Input ( Only Energy Meter )
AI2
GND
TX
RS232 Output
RX
GND
A
RS485 Output
B
IN1+
Temperature sensor water inline +
IN1-
Temperature sensor water inline -
GND
Temperature sensor water inline grounding
IN2+
Temperature sensor water outline +
IN2-
Temperature sensor water outline -
GND
Temperature sensor water outline grounding
Warning
Wire when it is power-off. Reliable grounding must be taken for the instrument before installation
and use.
Use eitherAC or DC power supply. Do not connect them both at the same time.
2.2. Powering on
As soon as the flow meter is switched on, the system will run automatically according to the last input parameters.
If the installation is accomplished when system is switched on, gain adjustment can be monitored in Window M04.
After code "*R" are displayed on the upper right corner of the screen, the system will activate the normal
measurement condition automatically. It is indicated by code "*R" on the upper left corner of the screen.
If it is the first time to use or install on a new site, the customer need to input the new installation site parameters.
Any parameters which are set by user will be saved permanently until they are changed by the user.
When the user modifies the parameters and removes the transducers, the meter will recalculate automatically, and
operate normally with the parameters.
The flow meter can always complete all tasks at the same time. The tasks (Including measurement, output, etc)

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will be carried out as usual, no matter in which display window.
2.3. Keypad Functions
Numbers “0~9” and “.”Input Numbers or Menu Code
“ ”Backspace or delete characters to the left or back to the previous menu.
“”Return to the last menu or open the next menu. Acts as "+" and "-" are used to enter numbers.
“Menu”Select a menu. Press this key first, then input two menu numbers to display the selected menu.
2.4. Keypad Operation
The flow meter adopts the window software design to consolidate or subdivide all of the parameters entered, the
instrument setup and measurement result displays into independent windows. The operator can input parameters,
modify settings or display measurement results by "visiting" a specific menu window. Each window serial number,
or so-called window ID code, has a defined meaning. For example, Window M10 indicates the parameter input for
pipe outside diameter, while Window M14 indicates the mounting spacing between the transducers, etc. (Refer –
Windows Display Explanations).
The keypad shortcut to visit a specific window is to press the “Menu”key at any time, then input the 2-digit
window ID code. For example, to input or check the pipe outside diameter, just press the “Menu” “1”“0”keys
for window ID code 10. Use “ ”and “ ” to switch.
Another method to visit a particular window is to press “ ”and “ ” to scroll the screen.
You can check the corresponding parameters by visiting the Data Type Windows. If you want to modify the
parameters, press “Enter ”first, input the digits then press “Enter ”again to confirm.
Attention
Generally, press
Enter
key first if operator wants to enter "modify" status. If the "modify" is still not
possible even after pressing the
Enter
key, it means that system is locked by a password. To
"Unlock" it, select "Unlock" in Window M54 and enter the original password.

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3.Quick start
3.1. Basic settings
For example, let us you have a pipe of 200mm outer diameter、4mm pipe thickness, measuring medium is water,
Pipe Material is PVC with no Liner, These parameters should be operated as follows:
Step1. Pipe Size Settings
Find M10; enter the pipe size, the outer diameter of
the pipe and the pipe thickness.
Press the “Enter”to confirm.
OD
200.0
mm
M10
Pipe settings
*R
Size
M.
thk
4.0
mm
Step2. Pipe Material
Use “ ” to switch to select the material of the
pipe.
Press the “Enter”to confirm.
Size
M.
M10
Pipe settings
*R
Other
3200
m/s
M.
0.PVC
Step 3. Water Temperature
Find M12, select the temperature of the water,
temperature should be 0-80 deg. C.
Press the “Enter”to confirm.
Note: Room temperature is 25 deg.C
WTMP
20
(。C)
M12
Medium
*R