Ultrasonic Level Meter User Manual
Contents
1. gt gt USER MANUAL ULTRASONIC LEVEL METER KAIFENG QINGTIANWEIYE FLOW INSTRUMENT CO LTD URL www flow meter cc No 1 Wangbai Road Huanglong Industrial Zone Kaifeng China KI A TEL 86 371 27880299 FAX 86 371 26669963 ip mm D C Al saama aaa 1 FUSO ES MS EIK KA A SS E SUE A TUU 1 O n ANTS TTT AL AS SME PURE NS amr ade TOCA CRMC Ser ee WA 2 A A a ony E not 2 ir RAINS a sa acne acess alia aiad a nana saa tm saat eid needa 2 2 Composition and SUCIO cai ti 3 SNC ti sal 4 A Technical data Ai 5 Ali The measuring and Mei AA 5 4 2 The Blanking dIS ANCe ooooooccccnnnononanccononanananonononanoncnnnccononancnnonccnonanannncncconananananonos 5 9 DISP SS OMI OM eee aaa sia 5 ABa ICA Cs ARAMEA Mm ee an ee er an Oe ee Pe 5 43 DIMENSIO Ma a a aE 6 4 6 The electronic unit panel layout E NVIGING AMA AA 8 5 Level Meter Opera A A A 8 DIS MENO ae sd ali 8 IL KV BOI annars A E A a 9 30 TWO WOKO MOO E aaa a iii 9 04 Operatomotale santi lid n ee re rr 11 39 Level MEET TSS UI sa it aeadehaetcivae a el hace A 12 5 JINStrUMent installato Nina dad 13 6 1 GENET Al INS WUC HON MAE EEE E ds 13 0 2 INStallation NOICE PANNA TAA A E MA a 14 TAE AI E P E A EAE EA A O A A A E A T A 18 8 CONNECE Ne WINO ira mainte ates 19 9 VEOUDIE SIOOUING aaa seuss 19 1 Introduction 1 1 Use Liguid level or material level measurement Liguid level and material2. level are collectively referred to as level material level are collectively referred to as level 1 2 Application To ensure that the ultrasonic transmission to the measured ultrasonic liguid level or material surface occasion Such as storage tank chute pool Wells drains metering box granary etc 1 3 Features eo Integrated design installed conveniently Protected in the excessive voltage and current protected in the thunder and lightning The big show window of LCD is easy to debug and observe Over voltage over current protection lightning protection Advanced since the clamp type terminal to ensure that wiring never loose Intellectual signal treatment technology guarantee that the instrument meets various kinds of operating occasion eo All plastic probe acid and alkali resistant adapt to bad environment 1 4 Range The instrument has the following range specifications Liquid level 4m 6m 8m 12m 20m 30m Material level 3m 5m 7m 10m 15m Note 1 The above range level measurement only Material level measuring the effective range of about 50 of the data material level measuring proposal chooses four wire or split type level gauge 2 Cold area outdoor installing applications should prevent the probe surface frost or freeze Can choose pipe long material level meter the internal probe into the container above model and model selection of the letter L 2 Composition And Structure Electronic unit E
3. 0 5 01 78 mm Measuring Cycle Electronic unit shell material die casting aluminum with plastic sprayed surface The sensor material Protect grade Installation Thread or Flange or bracket Cable Entry M20 Parameter set up 3 induction buttons 4 5 Dimension mi Ey 4m type 6m type 8m type 2 12m 20m 30m type 20m 30m Horn type 4 6 The Electronic Unit Panel Layout LCD display window Binding post 4 7 Wiring Diagram Note Power supply for DC24V level meter itself Please pay attention to the wiring signs Outer loop should be have current power supply capability of 30MA 5 Level Meter Operation 5 1 Display Method This level meter has 4 digits LCD display 5 2 Key Board Functions Selection of the display content or parameter Changing the value of the certain digit from O to 9 in turn Selection of the digit to be changed 5 3 Two Working Mode 5 3 1 The instrument has two working mode running state and operating state Press the two keys SEL and MOV to change within two different modes In running mode green lamp will keep on lighting In programming mode green lamp will flash 5 3 2 On measuring mode level meter will carry out normal measuring at this time press the SEL key displayed location value empty value and temperature will be alternated Display Mode Thing Location Value Empty From Value Temperature Value 5 3 3 There will be a A mark on
4. 10m has a reactive ambit 1 2m Because of reactive ambit if the measuring distance has a sudden change from far to near an error may come out of the level meter although the sudden change on distance won t happen on factual work condition 5 5 6 Press SEL and MOV keys simultaneously and then enter the operating mode Advise the installation height value the displayed level value and empty value should change accordingly 5 5 7 User could use ammeter to measure 4 20mA output 41 6 Instrument installation Reasonable instrument installation is the key to its reliable work Level meter installed on the top of the container Probe surface vertical point to liquid level If is airtight container should be adopted flange installation Other conditions can use bracket installation Flange installation should be according to the thread sizes make the flange of the level meter 20m 30m type has directly equipped with the flange suggestion Installation be carried out by trained person in accordance with the manual 6 1 General Instruction 1 The temperature of the process may not exceed 75 C and the pressure may not exceed 0 1 MPa 2 For exposed or sunny locations a protective hood is recommended 3 Level meter must be some distance from the tank wall 4 There s beam angle when Energy transducer radiate ultrasonic pulse From energy transducer lower edge to measured medium please avoid A B obstacle in the radiation region of ultras
5. ange connection tube should with smooth inner should with smooth inner length is shorter than Requirement wall surface and length wall surface and length 200mm Sensor should be out shorter than 400mm shorter than 150mm from installation mouth 6 2 7 If there s big liquid wave fluctuation or there s float ball or other obstacle may reflect the wave user can add a plastic tube inside the tank Plastic tube can make the wave only transmit in the plastic tube and make sure the measurement stability Plastic tube inner size should be larger than the outer size of sensor with smooth inner wall surface straightness and full face Install the plastic tube from the flange mouth to the bottom of the tank Please open a hole on the top and bottom of the tube to make sure to keep the same level inside and outside the tube 45 6 2 8 When install to the cold area should choose the lengthen sensor of the level meter make the sensor extend into the container shun frost and icing lengthen sensor of the level meter 16 7 Seal After setting parameters and level meter in normal operation please tighten the cable entrance water proof gland The outer end of cable should be down warping to avoid rain water seeping into Correct 8 Connect the wiring Insert and push up The terminal blocks are all self tightening ones Use a straight screwdriver to wire as follow Please noted the the power supply specificati
6. lectronic unit Esi rt Ln 7 gy ey ry Threat _ Thread mA Sensor sensor Liik of emission Surface of ona Level meter of 4m 6m 8m type Level meter of 12m 20m 30m type Electronic unit Flange Sensor Level meter of 20m 30m Horn type 3 Principle The sensor of the meter pulses in the direction of the product surface There they are reflected back and received by the sensor The meter measures the time t between pulse transmission and reception The meter uses the time t and the velocity of sound to calculate the distance D between the sensor membrane and the product surface D c t 2 As the device knows the empty distance H from a user entry it can calculate the level as follows L H D Y Y y 4mA B Blanking distance D distance value L level value H installation height F level span The ultrasonic velocity in gas is influenced by the gas temperature So the level meter need to detect the gas temperature at work So the material level meter need to detect the gas temperature at work compensation for sound velocity Blanking distance Span F may not extend into the blanking distance B Level echo from the blanking distance cannot be evaluated due to the transient characteristics of the sensor 4 Technical data 4 1 The measuring range 4 2 The Blanking distance 4 3 Display resolution 4 4 Basic data Cable diameter D 6 D12 mm Single wire diameter D
7. n height not less than the range value of material level meter otherwise the level value remains the same 62 621 90 lt 208 At the same time according to the MOV Press the MOV to choose parameters SEL entered the state parameter Settings bd 13 UU e ee lt Press INC to change the value of the bit Press the SEL store on a parameter and into the next parameter 40 At the same time according to the MOV SEL exit parameter set state 5 5 Level Meter Testing 5 5 1 This level meter ought to be supplied with supplied with correct power DC24V 5 5 2 Let the probe be perpendicular to a wall and make sure the measuring distance is larger than the blacking distance and no barriers within the beam angle zone 5 5 3 Level meter will display HLUE firstly and then show thing location value 5 5 4 Turn on the power and after a few seconds the instrument will enter the running mode And check the level value the empty value and the temperature value in turn through SEL key 5 5 5 Move the probe slowly the level value and the empty value should change slowly accordingly When this level meter is moving in a short distance within 1 meter The moving speed ought to be no more than 0 1m s There has a preset reactive ambit in this level meter When target is beyond the ambit the level meter need about 5s to make a new measuring Level meter full scale within 10m has a reactive ambit 0 5m Level meter full scale beyond
8. o measured distance if it s less than measured distance that there will be a signal flash on the left sight of screen ting location value and analog value will be changed the value of measure distance will be changed 5 4 Operation State 5 4 1 In this state the level meter will display sorts of parameter which ought to be set by user Press SET to choose and parameter will be displayed as follows Height of installation this height means the distance from sensor to the bottom of tank 5 4 2 Output range It means the max value of measured material which is homologous with 4 20mA 5 4 3 Inner password Input the correct values the instrument enter into the state of internal work parameter Settings The user does not have to set the secret code values do not enter into the state of internal work parameter Settings Press SEL and Leave this parameter Or at the same time press the SEL MOV key to exit the parameter setting state 9 Display Mode Installation height Output range Inner password 5 4 4 According to SEL key parameter choice according to MOV choose one to make it darker Press INC to modify After the modification Should a SEL button again The instrument can store the parameters 5 4 5 At the same time press the SEL MOV key and loosening can exit the parameter Settings and store the set of parameters 5 4 6 Set the installation height must be accurate otherwise the level value may be correct Installatio
9. on and polarity Outer ring circuit should with 30mA current power supply capability 47 9 Trouble Shooting No display and do not 1 Power supply error 1 Check the power supply With display but do not 1 The sensor doesn t aim at the liquid 1 Adjust the sensor and aim at the work or the material material 2 The surface has large fluctuations 2 Add a plastic tube to the 3 Level of material is very uneven tank refer to installation 4 Liquid surface with lots of foam instruction 5 After emptying the tank the tank 3 Change to level meter with bottom is not flat larger range 6 Over the measuring range 4 Change to level meter with larger range or take other measurement method 5 After infusing liquid or material the level meter will back to normal work 6 Change to level meter with larger range Display unstable or the The level enters the blanking distance Increase the installation height or measured value has a The range value is bigger than prevent the level is too high great installation height Change the installation height to a deviation There is strong electromagnetic correct value interference Make sure the level meter There is obstacle obstruct the ultrasonic grounding very well to make it with wave shielding Flange plate is metallic not plastic Change installation location or add The sensor emitting surface or side a plastic tube refer to installation surface contact with the metal instruc
10. onic wave beam For example human ladder level switch etc 5 Please make sure ultrasonic beam angle can not intersect with feed stream 6 Please make sure the max material level can not enter into measuring blind area 7 Please try to make sure the energy transducer radiate direction vertical to the medium level 6 2 Installation Notice 6 2 1 Please take some methods to avoid the level meter from sun shading and rain Please do not install the meter on the top of material infusion entrance 412 1 Correct 2 Wrong 6 2 2 Energy transducer should be vertical to the measuring medium surface Please note meter can not be install in the middle of the tank to avoid reflection echo 1 Correct 2 Wrong 3 Wrong 13 6 2 3 Meter Installation should be avoid A B obstacle 1 Wrong 2 Correct 6 2 4 If install outside or in moist environment please tighten seal gland of the cable Also please make the cable as U at the cable entrance 14 6 2 5 If there s mixing in the tank please install meter far away from the mixer Please use guide wave tube installation type if there s some foam or wave 6 2 6 If is closed tank the flange and connection tube should be follow below Model 4m 6m 8m_ tm 20m30m Flange bore size should Flange bore size should Flange bore size should be be bigger than 65mm be bigger than 100mm not smaller than 200mm Flange connection tube Flange connection tube Fl
11. the right side of LCD screen which will flash to show that returned wave can be received The unit of location and empty value are meter m the unit for temperature is C 5 3 4 When power this level meter or return from programming mode location value will be displayed first Thing location value Empty value Temperature 5 3 5 Press the SEL key displayed location value empty value and temperature will be alternated 5 3 6 User ought to unlash the keys when press them down For that level mete could display alternately 5 3 7 In running state press the INC or MOV this operation is invalid 5 3 8 Press SEL and MOV at the same time and then unlash them this operation could get into operating state 5 3 9 Press SEL and MOV at a long time the level meter will be reset 5 3 10 This level meter will get distance measurement directly Thing location value is got from the height of installation detract distance measurement So distance measurement ought to be correct and the the height of installation ought or set correctly 5 3 11 Local temperature have much to do with the accuracy of measurement So the displayed temperature ought to be correct 5 3 12 No matter which value is showed on the screen the output of level meter is homologous with distance measurement Also user could ask the manufacturer to adjust the homologous value of measured distance and 4 20mA 5 3 13 Installation height ought to be higher or equal t
12. tion Change to use plastic flange plate Use a rubber gasket to make it isolate with the metal For the tank with 4m 6m 8m tank flange connection tube length should shorter than 400mm installation mouth or 12m tank flange connection tube length should shorter than 150mm sensor is in round tube 20m 30m sensor should out from the installation mouth 18
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