RF Admittance Level Transmitter

Transcription

1 RF Admittance Level Transmitter

2 PRODUCT INTRODUCTION PRINCIPLE RF Admittance Level Transmitter utilizes the capacitance formed between the sensing probe and the reference probe or the metal vessel wall to calculate the level of the medium inside the vessel according to the capacitance theory that the capacitance and vessel are proportional increased. When the probe is surrounding by the air, little capacitance (C A ) is measured by the equivalent capacitor, the capacitance increase gradually as computing media, the max. capacitance (C ) will be B measured while the tank is full, the difference (dc) between C A and C B is proportional to the level. (Recommend range dc =5 ~000 pf) C B C A 100% dc= C-C B A FEATURES 4~0mA wire Loop power Low consumption of power (0mA Max) High accuracy of linearity (< 1% FS) compensation, low temperature effect( 0.% FS / C) Easy calibration (Any points for calibration) No blind distance, ideal for different tanks Suitable for high temperature, high pressure and corrosive environment LCD local display C A 0% APPLICATION EXAMPLE Recorder PB Series Bargraphic Display Panel Meter 4~0mA Grounding PM Series Digital Display Panel Meter 1

3 APPLICATION EXAMPLE EB500 EB501 EB5A0 EB5A1 EB5300 EB5301 EB53A0 EB53A1 EB5400 EB54A0 Conductive Tank Non-Conductive Tank Height of Vessel > 4m Height of Vessel < 4m Operation > 80 C ( Not more than 00 C) Dielectric Constant of Media>4 Dielectric Constant of Media<4 Corrosive Media Agitator inside the vessel Good Pipe shield is suggested Unsuitable Fair EB500 EB501 EB5A0 EB5A1 EB5300 EB5301 EB53A0 EB53A1 EB5400 EB54A0 Aqueous Solution Oil Solution Acid or Akali Solution Feed & Grain Mining & Cement Good Pipe shield is suggested Unsuitable DIELECTRIC CONSTANTS CHART Material Dielectric Constant Material Dielectric Constant Material Dielectric Constant Material Dielectric Constant Air 1 Heavy Oil.6~3.0 Cement 4~6 Acetone 0~30 Gasoline 1.9 Grain.5~4.5 Butanol 11 Carbide Powder 5~30 Diesel.1 Corn.3~.6 Ethanol 16~31 Sulfuric Acid 84 Edible Oil ~4 Rice 3~8 Ammonia 1 Water 81 WIRING AND CAUTION After installation of the Admittance Level Transmitter on the top of tank, please make sure the cover of the transmitter is contacted with tank perfectly. Please avoid the grounding of panel meter to touch the tank wall. While the panel meter is not supplied with a power supply, please prepare a 4V power supply for use. The max cable length is depends on the max resistance.maximum resistance is not to exceed (Vs-)X 50 to ensure the accuracy of measurement. Make sure to separate the signal cable with other big power cables (such as pump, conveyor and solenoid valve)while wiring. Before turning on power, make sure all wirings are correct. Connect isolation cable with GND of power. If there is heater or other electric device in the application, contacting the cover of the transmitter and tank can decrease EMI.

4 STANDARD TYPE 1/"NPT 1/"NPT 1/"NPT Dimensions (unit:mm) L=4M (Max.) PP L=4M (Max.) PFA 5 L=4M (Max.) 10 PEEK Suitable for middle/ small tank Media : non-conductive material low moisture material Suitable for middle/big tank Media: Dielectric Constant >4 Conductive Material Suitable for middle/ small tank Media : non-conductive material low moisture material Model No. EB500 Rod Probe EB5A0 Rod Coating Type EB501 Hi-Temp Rod Probe Probe Material with PFA Coating Ambient -0~70 C -0~70 C -0~70 C -40~00 C Operation Voltage 4 10%Vdc 4 10%Vdc 4 10%Vdc Analog Output 4 ~0mA( two wire) 4 ~0mA( two wire) 4 ~0mA( two wire) Measuring Range 0~000pF 0~000pF 0~000pF Accuracy 1%FS(5 C) 1%FS(5 C) 1%FS(5 C) Housing IP Degree Connection Weight Approx..3kg(1m) Approx..3kg(1m) Approx..8kg(1m) Pressure 40kg/cm 5kg/cm 40kg/cm Note :Hi-Temp Wire Coating Type is available, the model is EB5A1 with PFA Coating 3

5 STANDARD TYPE 1/"NPT 1/"NPT 1/"NPT Dimensions (unit:mm) 5 L=50M (Max.) 10 PP 100 M5 5 L=50M (Max.) 10 PP 150 PFA M L=50M (Max.) 10 PEEK 88 8 Suitable for middle/ small tank Media : non-conductive material low moisture material 8 PTFE Suitable for middle/big tank Media: Dielectric Constant >4 Conductive Material M5 Suitable for middle/ small tank Media : non-conductive material low moisture material Model No. EB5300 Wire Probe EB53A0 Wire Coating Type EB5301 Hi-Temp Wire Probe Probe Material with PFA Coating Weight Material PTFE Ambient -0~70 C -0~70 C -0~70 C -40~00 C Tensile Strength 000Kgf 000Kgf 000Kgf Operation Voltage 4 10%Vdc 4 10%Vdc 4 10%Vdc Analog Output 4 ~0mA( two wire) 4 ~0mA( two wire) 4 ~0mA( two wire) Measuring Range 0~000pF 0~000pF 0~000pF Accuracy 1%FS(5 C) 1%FS(5 C) 1%FS(5 C) Housing IP Degree Connection Weight Approx..3kg(1m) Approx..3kg(1m) Approx..8kg(1m) Pressure 40kg/cm 5kg/cm 40kg/cm Note :Hi-Temp Wire Coating Type is available, the model is EB53A1 with PFA Coating 4

6 STANDARD TYPE 1/"NPT 1/"NPT "x5kg/cm PP "x5kg/cm PP Dimensions (unit:mm) L=4M (Max.) L=4M (Max.) PFA PFA Model No. Probe Material Ambient Operation Voltage Analog Output Measuring Range Accuracy Housing IP Degree Connection Suitable for middle/ small non-conductive tank Media : non-conductive material low moisture material EB5400 Two Rode Probe -0~70 C 4 10%Vdc 4 ~0mA( two wire) 0~000pF 1%FS(5 C) "x5kg/cm flange Suitable for middle/ small non-conductive tank Media: Conductive Material EB54A0 Two Coating Rode Probe with PP / PFA Coating -0~70 C 4 10%Vdc 4 ~0mA( two wire) 0~000pF 1%FS(5 C) "x5kg/cm flange Weight Pressure Approx..3kg(1m) 5kg/cm Approx..3kg(1m) 5kg/cm Note:Min. Connection is " flange 5

7 CALIBRATION & SETUP Setting mode Display Value sec Control mode System mode A: K: U: B: L: V: C: M: W: D: N: X: E: O: Y: F: P: Z: G: Q: H: R: I: S: J: T: Main Menu Sub-Menu Range Default Description 0~3-1999~ ~ ~ ~9999 SAVE,RSET BACK SAVE,RSET BACK SAVE SAVE Decimal point setting 0mA corresponding display value 4mA corresponding display value Value for high point (Hipt). Value for low point (Lopt). Memory for max & mini value during operation. SAVE: Save value into Eeprom REST: Clean present value and memory BACK: Go back to sub-menu Lo,MID,HI ON, OFF 1~60sec LO OFF 1 HI,Lo HI 0~9999 0~ ~ ~ ~ Software Filter Output latch Reflash time Measuring range Capacity Value High point Capacity Value Low point Capacity Value 4mA fine turn 0mA fine turn Load default Note 1:The setting of Hipt, Lopt please refer to calibration procedures on the manual Note :The output will latch when display is 110% or -10% Note 3:Re-Calibration is necessary if measuring range is changed 6

8 ORDER INFORMATION EB H M ORDER NO. Standard Type 5: Rod Probe Type 53: Wire Probe Type 54: Two Rod Probe Type MATERIAL Metal Probe Plastic Coated Probe 0: 6: SUS316 A: PFA TEMPERATURE RESISTANCE 0: Standard (max.80 C) 1: Hi-Temp Type (max.00 C) CONNECTING Dimension D --- 1" E /" F --- " G /" H --- 3" I --- 4" J --- 5" K --- 6" S --- others Specification M --- 5kg/cm N kg/cm O Lbs P Lbs Q --- PT R --- PF(G) T --- BSP U --- NPT V --- GAS S --- others PROBE LENGTH (Uuit: mm) 0500: below 500mm 1000: 501~1000mm 1500: 1001~1500mm 500mm per Unit Use English letter as first code for probe length over 10m. A150 represents 15m, A00 represents 0m * Tolerance of the total product length is 5mm * Characteristics, specifications and dimensions are subject to change without notice. * Please contact your nearest distributing office for further informations. 7

9 INSTALLATION 1. Please choose Two Rod Probe type for non conductive tank (Fig.1), or install a concentric circles metal pipe shield with vent hole at the top outside the probe (Fig. ) Metal strap. The rod or wire probe should be parallel to the tank wall. To prevent material from sticking between the probe and tank wall, the probe shouldn't be too close to the tank wall. 3. If the container is irregular-shaped, such as a cylindrical, and the medium is liquid with low viscosity, the rod should be placed inside a concentric circles metal pipe shield with vent hole at the top.(fig. ) 4. Coating Probe type is necessary for conductive media (eg. Water...), as the bare electrode can't operation normally in conductive media. Tube Fig. 1 EB5400 Rod probe Vent hole 5. During the installation, the process connection should be grounded. An installation without proper grounding will not guarantee normal operation of the device later on. 6. For non-conductive medium of powder or granules in big tank, the wire probe should be fixed to the bottom of tank 7. When all electrical connections inside of Admittance Level Transmitter housing are finished, the housing cover and the conduit opening should be sealed and tightened to prevent moisture from soaking in. 8. If an agitator is in place (see fig. 4), a pipe shield outside the probe is recommended. Fig. Rod probe wire probe Isolate supporter Ceramic isolator Fig. 3 Rod probe Agitator Cable probe Fig. 4 8

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