1. Manuals
  2. Brands
  3. Longrun Manuals
  4. Measuring Instruments
  5. LRF-2000S
  6. User manual

Longrun LRF-2000S User Manual

Ultrasonic flow meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Ultrasonic Flow Meter User Manual
Type: LRF-2000S
LONGRUN INDUSTRIAL INSTUMENT CO.,LTD

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LRF-2000S and is the answer not in the manual?

Questions and answers

Related Manuals for Longrun LRF-2000S

Summary of Contents for Longrun LRF-2000S

  • Page 1 Ultrasonic Flow Meter User Manual Type: LRF-2000S LONGRUN INDUSTRIAL INSTUMENT CO.,LTD...

  • Page 2: Table Of Contents

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Contents 1. Introduction ..........................4 1.1 Preface ..........................4 1.2 Features........................... 4 1.3 Flow measurement principle ..................4 1.4 Optional transducer ....................... 5 1.5 Typical application ......................5 1.6 Product Identification ....................5 1.7 Specifications ........................6 2.
  • Page 3 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 4.7 How to reset the totalizers .................... 27 4.8 How to restore the flow meter with default setups ............27 4.9 How to use the damper ....................27 4.10 How to use the zero-cutoff function ................27 4.11 How to setup a zero point ...................

  • Page 4: Introduction

    Powerful Recording Function, record the totalizer data of the last 64 days/64 monthes/5 years. 1.3 Flow measurement principle The LRF-2000S ultrasonic flow meter is designed to measure the fluid velocity of liquid within a closed conduit. The transducers are a non-contacting, clamp-on type, which will provide benefits of non-fouling operation and easy installation.

  • Page 5: Optional Transducer

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com θ is the include angle to the flow direction M is the travel times of the ultrasonic beam D is the pipe diameter Tup is the time for the beam from upstream transducer to the downstream one Tdown is the time for the beam from downstream transducer to the upstream one ΔT=Tup –Tdown 1.4 Optional transducer...

  • Page 6: Specifications

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 1.7 Specifications Items Specifications Accuracy Better than ± 1% Repeatability Better than 0.2% Principle Transit-time measuring principle Measurement 500ms Period LCD with backlight, display accumulated flow/heat, instantaneous Main unit Display flow/heat, velocity, time etc. Analogue output: 4-20mA or 0-20mA current output. Impedance 0∼ 1k.

  • Page 7: Installation And Measurement

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2. Installation and Measurement 2.1 Wiring diagram 2.2 Keypad The keypad for the operation of the flow meter is as MENU shown by the right picture. Keys 0 - 9 and . are keys to enter numbers Key ▲/+ is the going UP key, when the user wants to go to the upper menu window.

  • Page 8: Menu Windows

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Key ENT is the ENTER key for any inputting or selections. Key MENU is the key for the direct menu window jump over. Whenever the user wants to proceed to a certain menu window, the user can press this key followed by 2-digit numbers. The MENU key is shortened as the „M‟...

  • Page 9: Steps To Configure The Parameters

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2.4 Steps to Configure the Parameters The following parameters need to be configured for a proper measurement: (1) Pipe outer diameter (2) Pipe wall thickness (3) Pipe materials (for non-standard pipe materials*, the sound speed for the material must be configured too) *Standard pipe materials and standard liquids refer to those with the sound parameters that have already been programmed into software of the flow meter, therefore there is no need to configure...

  • Page 10: Transducers Mounting Allocation

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com (14) Press MENU 1 to check up the measuring data. Note: 1. For heat measurement, please connect PT100 which installed in water supply and water back pipe to T1, TX1, T2, TX2, GND terminal. 2. After setting parameter, remember to store parameter in MENU 26, to avoid parameter lose after turn off.

  • Page 11: Transducers Installation

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com (1) Install the transducers on a longer length of the straight pipe. The longer the better, and make sure that the pipe is completely full of liquid. (2) Make sure that the temperature on the location does not exceed the range for the transducers. Generally speaking, the closer to the room temperature, the better.

  • Page 12: Wiring Diagram Of Transducer

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2.6.1 Wiring diagram of transducer 2.6.2 Transducers Spacing The spacing value shown on menu window M25 refers to the distance of inner spacing between the two transducers. The actual transducers spacing should be as close as possible to the spacing value. 2.6.3 V-method Installation V-method installation is the most widely mode for daily measurement with pipe inner diameters ranging from 15 mm to 200 mm.

  • Page 13: Z-Method Installation

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2.6.4 Z-method Installation Z-method is commonly used when the pipe diameter is above 200mm. 2.6.5 W-method Installation W-method is usually used on pipes with a diameter from 15mm to 50mm.

  • Page 14: N-Method Installation

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2.6.6 N-method Installation Rarely used method. 2.7 Installation Checkup Through the checkup of the installation, one can: check the receiving signal strength, the signal quality Q value, the traveling time difference of the signals, the estimated liquid speed, the measured traveling time of the signals and the calculated traveling time ratio.

  • Page 15: Signal Quality

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2.7.2 Signal quality Signal quality is indicated as the Q value in the instrument. A higher Q value would mean a higher Signal and Noise Ratio (short for SNR), and accordingly a higher degree of accuracy would be achieved.

  • Page 16: Menu Window Details

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com window for viewing date totalizer. M90~M94 are diagnostic windows for a more accurate measurement. M97~M99 are not windows but commands for the outputting of display copying and pipe parameter setups. M+0~M+8 are windows for some additional functions, including a scientific calculator, viewer on records such as total working hours, turn-on and turn-off times, dates and times when the flow meter has been turned on or turned off.
  • Page 17 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Window for entering pipe wall thickness You may skip the menu and enter inner diameter in M13 instead. Window for entering the inner diameter of the pipe If pipe outer diameter and wall thickness are enter correctly, the inner diameter will be calculated automatically, thus no need to change anything in the window Window for selecting pipe material Standard pipe materials (no need to enter material sound speed ) include:...
  • Page 18 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 11. Standard-S1 (small size transducer #1) 12. Standard-L1 (large size transducer #1) 13. PI-Type 14. FS410 (middle size transducer for FUJI flow meter) 15. FS510 (large size transducer for FUJI flow meter) 16. Clamp-on TM-1 (Middle size transducer ) 17.
  • Page 19 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 2. USA gallon (gal) 3. Imperial Gallon (igl) 4. Million USA gallon (mgl) 5. Cubic feet (cf) 6. USA liquid barrel (bal) 7. Oil barrel (ob) The flow unit in terms of time can be per day, per hour, per minute or per second. So there are 32 different flow rate units in total for selection.
  • Page 20 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com By checking the displays, you can know if the communication is ok. Switches for the built-in data logger. There are as many as 22 different items can be chosen. To turn this function, select „YES‟ the system will ask for selecting the items. There are 22 items available.
  • Page 21 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Fuji Extended Protocol. If you are going using MODBUS-RTU you have to select „MODBUS_RTU‟. AI3 value range. Used to enter temperature/pressure values that are corresponding to 4mA and 20mA input current. The display values have no unit, so that they can present any physical parameter. AI4 value range.
  • Page 22 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 17.ON/OFF viaRS232 18.Daily Timer (M51) 19.Timed alarm #1 20. Timed alarm #2 21.Batch Totalizer Full 22. M51 Timer 23. Key Stroking ON 24.Disable BEEPER OCT (Open Collect Transistor Output)/OCT1 setup By selecting a proper input source, the OCT circuit will close when the trigger event occurs.
  • Page 23 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 5. AI4 falling edge (when AI3 stop receiving 2mA or more current) 6. AI5 rising edge (when AI3 receives 2mA or more current) 7. AI5 falling edge (when AI3 stop receiving 2mA or more current) 8.Timer periodically (define the start time and interval time in M51) 9.Timer daily...
  • Page 24 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Turn on or turn off the Energy totalizer. Select thermal energy totalizer multiplying factor. Factory default is „1‟. 1. Display the temperature difference 2. Window for entering the lowest temperature difference. Heat meter is on 1.
  • Page 25 YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com rate at the time of power on and off Displays the total working time of the flow meter. When the backup battery is removed, the total working time will be reset to zero. Displays the last power-off date and time Displays the last power-off flow rate Displays how many times of has been powered on and powered off.

  • Page 26: How To

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 4. How To 4.1 How to judge if the instrument works properly Enter into M08, if „R‟ is displayed on the screen, the instrument is working properly, If 'E' is displayed, the current loop output is over-ranged. Increasing the range setting in M57 will make the 'E' letter disappear.

  • Page 27: How To Use The Totalizer Multiplier

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 4.5 How to use the totalizer multiplier Use window M33 to select a proper totalizer. Make sure that the totalizer pulse is appropriately speeded. It should not be too fast and neither too slow. A speed of producing a pulse in several seconds or minutes is preferable.

  • Page 28: How To Setup A Zero Point

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Generally the default value is 0.03m/s The low-cutoff value does not affect the flow measurement when the actual flow is absolutely greater than the low-cutoff value. 4.11 How to setup a zero point There exists a „Zero Point‟ with certain installation which means the flow meter will display a non-zero value when the flow is absolutely stopped.

  • Page 29: How To Use The Frequency Output

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Example A: flow rate range is 0-500m /h. Just enter 0 in M56 and 500 in M57. Example B: flow rate range is -500-0-1000m /h. If flow direction is not an issue for you, you may select 20-4-20mA mode in M55.

  • Page 30: How To Use The Totalizer Pulse Output

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 4.16 How to use the Totalizer Pulse Output The totalizer output will produce a pulse output with every unit flow of the totalizer. The totalizer pulse output can only be realized by mapping the pulse output to the OCT or BUZZER hardware devices.

  • Page 31: How To Use The Built-In Buzzer

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com (1) Enter flow rate lower limit 100 in M73 (2) Enter flow rate upper limit 500 in M74 (3) Enter flow rate lower limit 600 in M75 (4) Enter flow rate lower limit 1000 in M76 (5) Select item '6.

  • Page 32: How To Use The Manual Totalizer

    4.25 How to check the ESN and other minor details Every set of the LRF-2000S flow meter utilizes a unique ESN to identify the meter. The ESN is an 8-digit number that provides the information of version and manufacturing date.

  • Page 33: How To Use Automatic Amending Function For Offline Compensation

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com (always is 8), stop bits (1). 4.30 How to use automatic amending function for offline compensation Use menu window 83 turn on or turn off this function. When the function is enabled, the flow meter will estimate the average flow uncounted (or „lost‟) during the offline session and add the result to the totalizer.

  • Page 34: How To Enter The Parameters Of User-Type-Transducer

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com 4.34 How to enter the parameters of user-type-transducer If a user-type-transducer is selected in menu window 23, you need proceed to enter additional 4 user-type-wedge parameters that describe the user transducers. If the PI-type transducer is selected, you need enter additional 4 PI-type transducer parameters that describe the PI-type transducers.

  • Page 35: How To Save / Restore Frequently-Used Pipe Parameters

    5. Troubleshooting 5.1 Power-on Error Displays and Counter-Measures The LRF-2000S ultrasonic flow meter provides an automatic power-on diagnosis for the hardware problems. When any message (with the power on) in the following table displays, counter-measures should be taken.

  • Page 36: Error Code And Counter-Measures

    5.2 Error Code and Counter-Measures The LRF-2000S ultrasonic flow meter will show Error Code in the lower right corner with a single letter like I, R etc. on menu windows M00, M01, M02, M03, M90 and M08. When any abnormal Error Code shows, counter-measures should be taken.

  • Page 37: Other Problems And Solutions

    YOUR FLOW MEASUREMENT EXPERT www.ultrasonicscn.com Relocate where No liquid inside pipe the pipe is full of Empty pipe Setup error on M29 liquid Enter 0 on M29 5.3 Other Problems and Solutions 1. When the actual flow inside the pipe is not standstill, but the instrument displays 0.0000 for the flow rate, and „R‟...

Table of Contents