AVI-DR Radar Lever Meter

 
1.Measurement Principle

Principle

The extremely narrow microwave pulse emitted by the antenna on radar level instrument can travel at the speed of light and part of its energy, which is reflected off the surface of target medium, is received by the very same antenna. The time lapse between pulse emission and reception by the antenna is proportional to the distance between the surface of target medium and the reference point on antenna. However, due to the fact that the electromagnetic wave is transmitted at extremely high speed, which leads to the tiny time lapse (nanosecond level) and makes it difficult to be identified,AVI-DR0X series of radar level instrument have adopted a special demodulation technology, enabling itself to detect the time lapse between pulse emission and reception correctly, and eventually generate accurate measurement result.

 

Features

The guided wave radar level instrument, adopted 26GHz as transmittion frequency, which make this series have specialties as below: Small beam angle, which centralize energy, make AVI-DR0X high ability of anti-jamming, hence high accuracy and reliable.Small antenna size, easy to mount and easy to equip extra dust protection Small blind zone, good accuracy even for small vessels. Shorter wave-length, suitable for small power.

 

Equipped with advanced microprocessor and unique EchoDiscovery echo processing technology, the radar level instrument can be used under various hazardous process conditions

 

The guided wave radar level instrument, with pulses as its working tool and extremely low emission power, can be mounted on various metal or nonmetal vessels, harmless towards the environment and human beings.

2.Product Overview
                                                                    AVI-DR05                                                           AVI-DR06
                                                                                                                         

Application:                                 Liquid                                                    Liquid
                                                                  Level measurement in liquids,                   Level measurement in liquids, under certain 
                                                 especially highly erosive liquids                 temperature and pressure, mildly erosive liquids

Max Measurement Range:            10m; 30m(Horn 80mm)                           30m
Measurement Accuracy:              ±5mm                                                  ±3mm

Process Temperature:                 (-40～130) ℃                       (-40～80) ℃
                                                              (-40～130) ℃
                                                              (-60～250) ℃
                                                              (-60～400) ℃

Process Pressure:                     (-0.1～0.3)MPa                                      Normal

                                                                                                                                                (-0.1～4)MPa
Frequency Range:                      26GHz                                                   26GHz
Signal Output:                           (4～20)mA/HART                                   (4～20)mA/HART        

Power:                                     2-wire(DC24V)                                        2-wire(DC24V)

                                               4-wire(DC24V/AC220V)                           4-wire(DC24V/AC220V) 
LCD:                                       Optional                                                   Optional


AVI-DR07                                               AVI-DR08                                                              AVI-DR09
                                                                                                  
Liquid                                          Solid                                                  Solid
Level measurement of highly          Strong dew/dust/crystal                      Normal Temperature/Normal
erosive medium under certain                                                                 Pressure
pressure/temperature limit and 
suitable for

20m                                             70m                                                  15m
±3mm                                        ±15mm                                            ±10mm
(-40～150) ℃                 (-40～80) ℃                     (-40～80) ℃

                                                  (-40～120) ℃                   (-40～120) ℃

                                                  (-60～250) ℃                   (-60～250) ℃

                                                  (-60～400) ℃

(-0.1～0.5)MPa                           Normal                                              Normal
                                                 (-0.1～4)MPa                                     (-0.1～4)MPa
26GHz                                        26GHz                                              26GHz
 
(4～20)mA/HART                      (4～20)mA/HART                               (4～20)mA/HART
2-wire(DC24V)                          2-wire(DC24V)                                   2-wire(DC24V)
4-wire(DC24V/AC220V)             4-wire(DC24V/AC220V)                      4-wire(DC24V/AC220V)

Optional                                    Optional                                              Optional

3. Mounting Requirements

●Basic Requirements

There is a certain existing beam angle while the antenna transmitting microwave pulses. There should be no barriers between the lower edge of antenna and surface of measuredmedium. Therefore it is highly recommended to avoid facilities inside vessels, such asladders, limit switches, heating spirals, struts and etc, during the mounting process.“False echo learning” must be carried out during the installation in this case.Furthermore, microwave beams must NOT intersect the filling streams. Be cautions duringthe installation: the highest level of target medium must NOT enter into blanking zone; the instrument must keep certain distance to vessel walls; every possible measure needs to be taken to position the instrument so that the direction of antenna emission is perpendicular to the surface of measured medium. The installation of instruments in xplosion proof area must abide by relevant local or federal safety regulations. Aluminum housing should be used for intrinsically safe explosion proof version, which is also applicable in explosion proof areas. The instrument must be connected with ground in this case.

●Illustrations

The reference plane is the thread or flange surface

1. Blanking Zone (menu1.9)

2. Empty (menu1.8)

3. Max. Adjustment (menu1.2)

4. Min. Adjustment (menu1.1)

Note：The highest level of measured medium must not enter into blanking zone while radar level measurement instrument is in operation.

●Mounting Position

Minium distance of 500mm between instrument and vessel wall during installation

1. Reference Plane

2. Center of Vessel or Symmetrical Axis

The best mounting position for a conical vessel with flat top is the center of its top, as the effective measurement can reach the bottom of vessel.

Installation with Gimbal

●Damp-proof

In order to avoid dampness under outdoor or humid indoor conditions or for those instruments mounted on cooling/heating vessels, sealrings used on cables should be screwed tight, plus the cable must be bended downward outside cable entry, indicated on the diagram below


●Antenna Extension

The transducer end must at least protrude 10mm out of socket.

AVI-DR06 Antenna Extension

If the senser is mounted in a socket extension that is too long,strong false echoes are generated which enterfere with the measurement.Make sure that the horn antenna protrudes out of the socket piece.

AVI-DR07 Connecting pipe diagram


●Rights and Wrongs in Mounting

1. Correct

2. Wrong: Instruments are mounted in the center of concave or arched vassel tops, which results in multiple echoes.

1. Wrong: Mount the instrument in/above filling stream, which results in the measurement of filling stream not the target medium.

2. Correct:

●Reflector installation

If there are barriers in vessels,it is required to mount baffle-board, by doing this, the echo reflected by the barrier will be reflected out. And “False Echo Storage” will be applied.

●Agitator

If there are agitators in vessels, instrument must be mounted as far away from agitators as possible. Once installation completed, a "false echo learning" should be carried out while agitators in motion to eliminate negative influence caused by false echo of agitators. You are advised to opt for installation with standpipe if foam or wave is generated due to the action of agitators.

●Instal lation with Standpipe

By using standpipe, the influence of foams can be reduced.

You are advised to opt for installation with standpipe (or bypass tube) to avoid the influence on measurement caused by barriers inside vessels or foam generation.

 

It is advised to install antenna inside of the standpipe to avoid the error caused by foam. The minimum inner diameter of standpipe should be 50mm.Avoid large cracks or welding seam when connecting standpipe. False echo storage must be carried out as well in this case.

 

Note: You must NOT mount instrument inside standpipe while measuring adhesive medium.

4.Electrical Connection

●Power Supply

20mA/HART(2-Wire)

Power supply and current signal are carried by the same two-wire connection cable. See the Technical Specifications of this guide for detailed requirement on power supply. A safety barrier should be placed between power supply and instrument for intrinsically safe version.

20mA/HART(4-wire)

Power supply and current signal are carried by two 2-wire connection cables respectively. See the Technical Specifications of this guide for detailed requirement on power supply. Earth-connected current output can be used for standard version of  level instruments, while the explosion proof version must be operated with a floating current output. Both instruments and earth terminals should be connected with ground firmly and securely. Normally you can either choose to connect with the earth terminal on vessel or adjacent ground in case of plastic vessels.

●Cable Connection

General Introduction

4~20mA/HART

Standard 2-wire cable with outside diameter of 5...9mm, which assures the seal effect of cable entry, can be used as feeder cable. You are recommended to use screened cables in the event of electromagnetic Connection cable with  special earth wire can be used as feeder cable.

 

Connection cable with  special earth wire can be used as feeder cable.

20mA/HART(4-wire)

The two ends of shielded cable must be connected with earth terminal. The shielded cable must be connected with inner earth terminal directly inside the transducer, while the outside earth terminal on housing must be connected with ground. In the event of earth-connected current, the shielding side of shielded cable must be connected to ground potential via a ceramic capacitor (e.g. : 1μF 1500V) in order to dampen the low frequency grounding current and avoid the disturbance caused by high frequency signals

5 Dimension（Unit：mm）

Material: PBT/AL/316L

Two-chamber      Material: AL/316L

AVI-DR05 Threaded Vision

AVI-DR06 Threaded Vision


AVI-DR07 Flange Version

AVI-DR08/09 Threaded Vision

AVI-DR08/09 Gimbal Flange

Horn Antenna

AVI-DR08/09 Threaded Vision


AVI-DR08/09 Gimbal Flange

Parabolic antenna

6 Selection & Ordering Information

●AVI-DR05

Explosion Proof Approval

1  Standard(Without Approval)

2  Intrinsically Safe（Exia IIC T6

3  Intrinsically Safe+Flameproof Approval（Exd ia IIC T6

Shape of Antenna/Material/Process Temperature

1   (R)Airproof Horn 50/PTFE/(-40～130) ℃

2   (R)Airproof Horn 80/PTFE/(-40～130) ℃

Process Connection/Material

1  (F)Thread  G1½A

2  (F)Thread  1½NPT

3  (L)Flange   DN50/PTFE

4  (L)Flange   DN80/PTFE

Z  Special Design

Length of Vessel Socket

1  100mm

2  200mm

Electronic

1   (4～20)mA/HART2-Wire

2   (4～20)mA/(22.8～26.4)V DC /HART 4-wire

3   (198～242)V AC/HART 4-wire

4   (4～20)mA/(22.8～26.4)V DC /HART 2-wire

5   Special Design

Housing/Protection

1   Plastic/IP66

2   Aluminium/IP67

3   Aluminium (2-chamber)/IP67

4   Stainless Steel316L/IP67

5   Stainless Steel316L(2-chamber)/IP67

Cable Entry

1   ½NPT

2   M20x1.5

Display/Programming

1  No

2  Yes

●AVI-DR06

Explosion Proof Approval

1  Standard(Without Approval)

2  Intrinsically Safe（Exia IIC T6）

3  Intrinsically Safe+Flameproof Approval（Exd ia IIC T6）

Shape of Antenna/Material/Process Temperature

1   (T)Horn Φ48mm/Stainless Steel 316L

2   (T)Horn Φ78mm/Stainless Steel 316L

3   (T)Horn Φ98mm/Stainless Steel 316L

4   (T)Horn Φ98mm(Lengthen）/Stainless Steel 316L

5   (T)Horn Φ123mm/Stainless Steel 316L

6   (S)Horn Φ98mm/PP/PTFE Shield (NO)

7   (S)Horn Φ98mm(Lengthen）/PP/PTFE Shield(NO)

8   (V)Horn Φ98mm/Stainless Steel 316L/PTFE Shield

9   (V)Horn Φ98mm(Lengthen）/Stainless Steel 316L/PTFE Shield

A   (V)Horn Φ123mm/Stainless Steel 316L/PTFE Shield

Z   Special Design

Process Connection/Material

GP  (H)thread  G1½A/Stainless Steel 316L

GA  (H)thread  1½NPT/Stainless Steel 316L

GB  (G)thread  G1½A/PP

GC  (J)thread  G1½A/Stainless Steel 316L/temperature(-60～250)℃

GE  (I)thread  G1½A/Stainless Steel 316L(Huff）

GX  Special Design

Flange/Material

                                               

F0 No

FX Special Design

Seal/Process Temperature

2  Viton(-60～150) ℃

3  Kalrez(-60～250) ℃

4  Graphite(-60～400) ℃

Electronic

1   (4～20)mA/HART 2-Wire

2   (4～20)mA/(22.8～26.4)V DC /HART 4-wire

3   (198～242)V AC/HART 4-wire

4   (4～20)mA/(22.8～26.4)V DC /HART 2-wire

Z   Special Design

Housing/Protection

1   Plastic/IP66

2   Housing/Protectionl/IP67

3   Aluminium (2-chamber)/IP67

4   Stainless Steel316L/IP67

5   Stainless Steel316L(2-chamber)/IP67

Cable Entry

1   ½NPT

2   M20x1.5

Display/Programming

1  No

2  Yes

●AVI-DR07

Explosion Proof Approval

1   Explosion Proof Approval

2   Intrinsically Safe（Exia IIC T6）

3   Intrinsically Safe+Flameproof Approval（Exd ia IIC T6）

Shape of Antenna/Material

1  (U)Stainless Steel&PTFE Flange DN50

2  (U)Stainless Steel&PTFE Flange DN80

3  (U)Stainless Steel&PTFE Flange DN100

Z  Special Design

Electronic

1   (4～20)mA/HART 2-Wire

2   (4～20)mA/(22.8～26.4)V DC /HART 4-wire

3   (198～242)V AC/HART 4-wire

4   (4～20)mA/(22.8～26.4)V DC /HART 2-wire

Z   Special Design

Housing/Protection

1   Plastic/IP66

2   Housing/Protectionl/IP67

3   Aluminium (2-chamber)/IP67

4   Stainless Steel316L/IP67

5   Stainless Steel316L(2-chamber)/IP67

Cable Entry

1   ½NPT

2   M20x1.5

Display/Programming

1  No

2  Yes

●AVI-DR08

Explosion Proof Approval

1   Explosion Proof Approval

2   Intrinsically Safe（Exia IIC T6）

3   Intrinsically Safe+Flameproof Approval（Exd ia IIC T6）

Shape of Antenna/Material

1  (T)Horn Φ48mm/Stainless Steel316L

2  (T)Horn Φ78mm/Stainless Steel316L

3  (T)Horn Φ98mm/Stainless Steel316L

4   (T)Horn Φ98mm(Lengthen）/Stainless Steel 316L

5   (T)Horn Φ123mm/Stainless Steel316L

6  (S)Horn Φ98mm/PP/PTFE Shield

7  (S)Horn Φ98mm(Lengthen）/PP/PTFE Shield

8  (V)Horn Φ98mm/Stainless Steel316L/PTFE Shield

9  (V)Horn Φ98mm(Lengthen）/Stainless Steel316L/PTFE Shield

A   (V)Horn Φ123mm/Stainless Steel316L/PTFE Shield

B  (W)Parabolic Φ196mm/Stainless Steel 316L

C  (W)Parabolic Φ246mm/Stainless Steel 316L

Z  Special Design

Process Connection/Material

GP   (H) Thread G1½A/Stainless Steel316L

GA  (H) Thread 1½NPT/Stainless Steel316L    

GB  (G) Thread G1½A/PP

GC  (J) Thread G1½A/Stainless Steel316L/ Temperature (-60～250) ℃

GE  (I)  Thread G1½A/Stainless Steel316L(Huff）

GF  (E) Thread G1½A/Stainless Steel316L/ Temperature (-60～150) ℃

GG  (E1) Thread G1½A/Stainless Steel316L/ Temperature (-60～250) ℃

GX  Special Design

Flange/Material

                                     
                                       

              F0 No

              FX Special Design

       Seal/Process Temperature

2  Viton(-60～150) ℃

3  Kalrez(-60～250) ℃

4  Graphite(-60～400) ℃

                 Electronic

1   (4～20)mA/HART 2-Wire

2   (4～20)mA/(22.8～26.4)V DC /HART 4-wire

3   (198～242)V AC/HART 4-wire

4   (4～20)mA/(22.8～26.4)V DC /HART 2-wire

Z   Special Design

Housing/Protection

1   Plastic/IP66

2   Housing/Protectionl/IP67

3   Aluminium (2-chamber)/IP67

4   Stainless Steel316L/IP67

5   Stainless Steel316L(2-chamber)/IP67

Cable Entry

1   ½NPT

2   M20x1.5

Display/Programming

1  No

2  Yes

●AVI-DR09

Explosion Proof Approval

1   Explosion Proof Approval

2   Intrinsically Safe（Exia IIC T6）

3   Intrinsically Safe+Flameproof Approval（Exd ia IIC T6）

Shape of Antenna/Material

1  (T)Horn Φ48mm/Stainless Steel316L

2  (T)Horn Φ78mm/Stainless Steel316L

3  (T)Horn Φ98mm/Stainless Steel316L

4   (T)Horn Φ98mm(Lengthen）/Stainless Steel 316L

5   (T)Horn Φ123mm/Stainless Steel316L

6  (S)Horn Φ98mm/PP/PTFE Shield

7   (S)Horn Φ98mm(Lengthen）/PP/PTFE Shield

8  (V)Horn Φ98mm/Stainless Steel316L/PTFE Shield

9  (V)Horn Φ98mm(Lengthen）/Stainless Steel316L/PTFE Shield

A  (V)Horn Φ123mm/Stainless Steel316L/PTFE Shield

B   (W)Parabolic Φ196mm/Stainless Steel 316L

C   (W)Parabolic Φ246mm/Stainless Steel 316L

Z  Special Design

Process Connection/Material

GP   (H) Thread G1½A/Stainless Steel316L

GA  (H) Thread 1½NPT/Stainless Steel316L

GB  (G) Thread G1½A/PP

GC  (J) Thread G1½A/Stainless Steel316L/ Temperature (-60～250) ℃

GE  (I)  Thread G1½A/Stainless Steel316L(Huff）

GF  (E) Thread G1½A/Stainless Steel316L/ Temperature (-60～150) ℃

GG  (E1) Thread G1½A/Stainless Steel316L/ Temperature (-60～250) ℃

GX  Special Design

Flange/Material

                            
                              

F0 No

FX Special Design

Seal/Process Temperature

2  Viton(-60～150) ℃

3  Kalrez(-60～250) ℃

4  Graphite(-60～400) ℃

                Electronic

1   (4～20)mA/HART 2-Wire

2   (4～20)mA/(22.8～26.4)V DC /HART 4-wire

3   (198～242)V AC/HART 4-wire

4   (4～20)mA/(22.8～26.4)V DC /HART 2-wire

Z   Special Design

Housing/Protection

1   Plastic/IP66

2   Housing/Protectionl/IP67

3   Aluminium (2-chamber)/IP67

4   Stainless Steel316L/IP67

5   Stainless Steel316L(2-chamber)/IP67

Cable Entry

1   ½NPT

2   M20x1.5

Display/Programming

1  No

2  Yes