Corrosion Resistant Solid Liquid Level Transmitter

  Product description VRPWRD90 series transmitters are 26GHz high-frequency radar level transmitters with analog signals 4-20mA, the Max. measuring distance is up to 70m. The antenna has been further optimized, and the latest update microprocessor can make higher speed signals analysis, which enables the level transmitters can be used in very complicated measuring applications such as reaction kettles or solid bunkers. Working principle The radar level transmitter antenna emits narrower micro wave pulses which will be transmitted via the antenna. The micro wave will be reflected back after touching the surface of a medium, and then antenna system will receive it and transmit it into the electrical circuit, which will be automatically turned into the level signals. A.  Setting measuring range B.  Low level adjustment C.  High level adjustment D.  Dead zone Measuring reference is the bottom surface of threads or the sealing surface of a flange. Note: when using the radar level transmitter, must keep the highest level of medium out of the dead zone (see area D shown in the drawing). Features The radar level transmitter adapts the emitting frequency of 26GHz, therefore it has the following features: Noncontact measuring, no abrasion, no contamination Easy installation due to small size of antenna Shorter wave length, which can get better reflection for the inclined solid surface. Smaller measuring dead zone, which can get better measuring results for small tanks. Smaller beam angle, which makes the energy be more concentrated, enhancing the wave reflection ability which can keep signals more powerful to avoid obstacles. Almost unaffected by corrosion and foams. Almost unaffected by changes of steam, changes of temperature and pressure in the air. Even in heavy dust environment, the transmitter can also receive the real level return wave. High SNR, which can make the instrument get better performance.Frequency 26GHz is the best option for measuring solid and low dielectric constant medium. VRPWRD95(F)
Application: for liquids and solids, for very corrosive liquids when be equipped with an anti-corrosion cover Measuring range (Maximum): 30m (depends on dielectric constant of different medium and the concrete working conditions) Process connection: Flange Medium temperature: -40℃~+150℃ Process pressure: -0.1 ~ +1.0MPa Accuracy: ±5mm, +/-3mm on request Frequency range: 26GHz Explosion proof: Ex ia IIC T6 Gb Enclosure protection grade: IP67 Signal output: 4-20mA/ HART (2-wire), RS485/ Modbus Installation Preparation before installation      Please note the below items to make sure the proper installation of the    instrument: Please leave enough space for the installation.      Please keep the installation position away from where there is strong vibration.     In order to make the fast, easy and safe installation, please follow the installation instructions below! Installation instruction (refer to the figure upper right): the instrument should be mounted at 1/6 of the tank diameter and the minimum distance between the symmetrical central line of the transmitter and the inner tank wall should be more than 500mm Note: (1).Reference surface     (2).Symmetrical central line of the tank  
  Tapered tank: When the top surface of a tank is flat, the instrument can be mounted in the middle of the top, which can ensure the measurement to the bottom of the tank.
                                                                         

Enclosure protection grade This instrument is in fully conformity with the requirements of the enclosure protection grade IP67. Please make sure the waterproof performance of the cable entry seal. See the picture on the right:
  How to make sure the installation can meet the requirements of IP67: Please make sure the cable entry seal is not damaged. Please make sure the cable is not damaged. Please make sure the cable meets the requirements of the electrical connection regulations. Bend the cable down before entering the electrical inlet, which will keep the water away from the housing, see mark (1) at the above picture. Please tighten the cable entry seal, see mark (2) at the above picture. Please tighten the unused cable entry with a seal cap. See mark (3) at the above picture. Transmitter calibration There are three debugging methods for VRPWRD90:            1.With display/ buttons 2. With a PC with a software            3. With a HART hand-hold communicator
  Structure dimensions (unit: mm) Housing      VRPWRD95

Flange Size	Horn Diameter D	Horn Height H (mm)
DN80	Ø76	227
DN100	Ø96	288
DN125	Ø121	620

Power supply: 2-wire       Standard type: (16~26) V DC Intrinsically safe: (21.6~26.4) V DC Power consumption: max 22.5mA/ 1W Allowed ripple: <100Hz  Uss<1V               (100~100K)Hz Uss<10mV   Cable parameter  Cable inlet/ plug: 1 M20x1.5 cable entry (cable diameter 5~9mm), one blindness block, M20x1.5 Wiring terminal: cross section 2.5mm²   Output parameter  Output signal/ communication protocol: (4~20) mA/ HART, RS485/ Modbus Resolution: 1.6µA Error signal: output current no change, 20.5mA, or 22mA, or 3.9mA 2-wire, load resistance, see the drawing below: Integral time: (0~50) s, adjustable Features: Dead zone: the remote end of an antenna Max. measuring range: 30m ( for both liquids and solids)    Note: the maximum measuring range depends on the dielectric constant and concrete working conditions. Micro-wave frequency: 26GHz Communication connection: HART communication protocol/ Modbus communication protocol; Measuring interval: approx. 1 second (depends on the parameter setting) Adjustable time: approx. 1 second (depends on the parameter setting) Display resolution: 1mm Ambient temperature: (-40~+70)℃ Process temperature (temperature of antenna):  VRPWRD95   (- 60℃~+150℃) Relative humidity: <95% Pressure: Max. 4Mpa Resistance to vibration: mechanic vibration 10m/s², (10-150) Hz     Beam angle depends on size of antenna

Antenna Size (mm)	Beam angle
Φ76	12°
Φ96	8°
Φ121	6°

 VRPWRD95

Approvals

P  Standard type (non-explosion) I   Intrinsically type (Ex ia IIC T6 Gb) D  Intrinsically and explosion proof type (Ex d ia IIC T6 Gb)

Process connection/material

B   Flange DN80/ stainless steel 304 C   Flange DN100/ stainless steel 304 D   Flange DN125/ stainless steel 304 E   Flange DN150/ stainless steel 304 F   Flange DN200/ stainless steel 304 H   Flange DN250/ stainless steel 304 M   Flange DN80/ with universal joint, carbon steel plated with Nickel K   Flange DN100/ with universal joint, carbon steel plated with Nickel T   Flange DN125/ with universal joint, carbon steel plated with Nickel Z   Flange DN150/ with universal joint, carbon steel plated with Nickel W   Flange DN200/ with universal joint, carbon steel plated with Nickel V   Flange DN250/ with universal joint, carbon steel plated with Nickel Y   Special design

Antenna type/material

B   Horn antenna Φ76mm/ stainless steel 304 C   Horn antenna Φ96mm/ stainless steel 304 D   Horn antenna Φ121mm/ stainless steel 304

Seal/ process temperature

V  Viton / (-40 - +150)℃ K  Kalrez / (-40 - +250)℃

Electronic unit

2  (4~20)mA/ 24V DC 2-wire 3  (4~20)mA/ 24V DC/ HART, 2-wire 4  (4~20)mA/ 220V AC, 4-wire 5  RS485/ Modbus

Housing/ enclosue protecion grade

L  Aluminum/ IP67 G  Stainless steel 304/ IP67

Cable Entry

M  M20x1.5 N   ½ inch NPT

Display/programmer

V   With X   Without

Anti – corrosion cover

F: be equipped with a anti-corrosion cover                                             Material: PVDF                                             For antenna with size of 96mm