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  • Address: Daxing Industrial Park, Jinhu County, Jiangsu Province
  • mobile phone: fifteen billion three hundred and fifty-eight million six hundred and sixty-one thousand eight hundred and eighty
  • Fax: 0517-86936880
  • Email: yijiayibiao@163.com

Radar level gauge

 Radar level gauge

Yjd800 series Radar level gauge Very short microwave with very low transmitting power is transmitted and received by antenna system. Radar waves travel at the speed of light. The running time can be converted into level signal by electronic components. A special time extension method can ensure stable and accurate measurement in a very short time. Even when there is false reflection, the latest micro processing technology and software can accurately analyze the level echo. By inputting the container size, the distance above can be converted into a signal proportional to the material level. The instrument can be debugged empty. It can be used in solid measurement K- Frequency band high frequency sensor. The measurement effect of the silo wall will not be affected by the focus of the material inside the bin.

 

Yjd800 series Radar level gauge Application range:

Yjd800 series radar liquid level meter is suitable for non-contact continuous measurement of liquid, slurry and granular material level. It is suitable for the occasions with large temperature and pressure changes, inert gas and volatilization.

 

Yjd800 series Radar level gauge Measurement principle:

The operation time of yjd800 series radar level gauge can be converted into material level signal through electronic components. A special time extension method can ensure stable and accurate measurement in a very short time. It is transmitted and received by the antenna system by transmitting very short microwave pulses with low energy. YJD800 Even in the case of complex working conditions and false echo, the latest micro processing technology and debugging software can accurately analyze the echo of the level.
 Schematic diagram of radar level meter


input
   
The antenna receives the reflected microwave pulse and transmits it to the electronic circuit. The microprocessor processes the signal and identifies the echo generated by the micro pulse on the material surface. The correct echo signal recognition is completed by intelligent software, and the accuracy can reach millimeter level. Distance from material surface D Time travel with pulse T In direct proportion to:  
D=C×T/2
among C Is the speed of light
Due to the distance of empty tank E If known, then the material level L Is:
L=E-D
output  
   
By entering the empty tank height E = Full tank height F = The full range of the instrument will be set to suit the application parameters automatically. Corresponding to four 20mA Output.

 

Yjd800 series Radar level gauge Technical parameters:

Working frequency: 6.8Hz
Beam angle: 24°YJD801, YJD802
18°YJD803
belt DN150 flange
14°YJD803
belt DN200 flange
12°YJD803
belt DN250 flange
Measurement range: 0… 35m
Repeatability: ±3mm
resolving power: 1mm
Sampling: echo sampling fifty-five second /s
Response speed: >0.2s( It depends on the specific use )
Current signal: 4… 20mA
Accuracy: <0.1%

Antenna material   YJD801 YJD802 by PP/PTFE 
YJD803
by 316L stainless steel

communication interface HART Communication protocol

Process connection YJD801 (PP PTFE antenna ) G1-1/2 316L stainless steel,:
YJD802(
Rod antenna ) : flanging flange DN50 DN80 DN100 DN150
YJD803(
Horn antenna ) : flange DN50 DN80 DN100 DN150 DN200 DN250

Power supply: 24V DC(+/-10%) Ripple voltage: 1Vpp
Power consumption: max22.5mA

Ambient temperature: - forty ℃… eighty
Vessel pressure (gauge) 1… 40bar

Explosion proof certification ExiaII C T6

Enclosure protection class IP68

Two wire connection power supply and signal output share one two core wire
Cable entry: two individual M20×1.5 (cable diameter 5… 9mm

 

Yjd800 series Radar level gauge Product selection:

D800 series Radar level gauge

 D801

 D802

 D803

category

D801

D802

D803

application

The process conditions are simple, corrosive liquid, slurry and solid  
For example:  
Water storage tank
Acid base storage tank  
Slurry tank  
Solid particles
Small oil storage tank

Corrosive liquids, slurries, solids in storage or process vessels  
For example:  
Water storage tank
Acid base storage tank  
Slurry tank  
Solid particles
Small oil storage tank

Adapt to various storage containers or process measurement environment, liquid, slurry, solid  
For example:  
Crude oil and light oil storage tank
Raw coal and pulverized coal bin
Volatile liquid storage tank
Coke level  
Slurry tank  
Solid particles

measuring range

twenty rice

twenty rice

thirty-five rice

Process connection

thread

flange

flange

Process temperature

-40-130

-40-150

-40-250

Process pressure

-1.0-3bar

-1.0-20bar

-1.0-40bar

Repeatability

±3mm

±3mm

±3mm

accuracy

< 0.1%

< 0.1%

< 0.1%

frequency range

6.8YJz

6.8YJz

6.8YJz

explosion-proof / Protection level

EXiaIICT6/IP68

EXiaIICT6/IP68

EXiaIICT6/IP68

signal output

4… 20mA/HART( Two lines )

4… 20mA/HART Two lines )

4… 20mA/HART( Two lines )

 

Yjd800 series Radar level gauge Order notice:

Please provide the following parameters when ordering:
1. Medium: name, state, density, viscosity, working temperature and working pressure
2. Working conditions: open tank or closed tank, material of the tank, whether there are other accessories (such as agitator) in the tank, and the position of the inlet and outlet
3. Other requirements: range, power supply, signal output, communication mode, material and size requirements of the table body

 

Yjd800 series Radar level gauge Installation instructions:

Installation in tank (D801,D802  
Standard installation

1. The radar antenna shall not tilt to the tank wall.  
two
In order to minimize the temperature effect, spring washers must be used at the joint of the butt flange.  
three
The mast antenna must be extended to install the short tube.  
four
Place the mast antenna vertically, and do not let the radar beam point to the tank wall.

 

Installation in tank( D803  
Standard installation

The antenna can not be tilted to 1 tank wall.  
two
The horn antenna must extend out of the installation short tube, otherwise the antenna extension tube should be used.  
three
The horn antenna must be adjusted to be vertical so that the radar beam does not point to the tank wall.

 

Yjd800 series Radar level gauge matters needing attention:

1. The measurement range is calculated from the point where the beam touches the tank low, but in special cases, if the tank low is concave or conical, the measurement cannot be carried out when the level is lower than this point.  
two
At this time, it is suggested that the low dielectric constant should be set at the low liquid level C The location of.  
three
Theoretically, it is possible to measure the position of the antenna tip, but considering the influence of corrosion and adhesion, the final value of the measurement range should be at least from the antenna tip 100mm  
four
For overflow protection, a safe distance can be defined and added to the blind area.  
five
The minimum measurement range is related to the antenna.  
six
With different concentration, foam can absorb and reflect microwave, but it can be measured under certain conditions.

debugging  
YJD800
It can be debugged in three ways:

1 through the display adjustment module YJPM 
two
By debugging the software YJSOFT 
three
adopt HART Handheld programmer

Field programming module( YJPM

1. Yjpm programmer consists of six There are two buttons and one LCD screen, which can display the adjustment menu and parameter settings. Its function is equivalent to an analytical instrument.  

adopt YJSOFT Software debugging  
Whatever the signal output, 4… 20mA/HART, All radar sensors can be debugged by software. use YJSOFT Instrument, need a software debugging CONNECTCAT Driver

Programmer size

 

Yjd800 series radar Liquid level meter Quality commitment:

Jinhu Yijia Instrument Co., Ltd. is mainly engaged in electromagnetic flowmeter, vortex flowmeter, orifice flowmeter, magnetic flap level gauge, glass plate level gauge and other products, and provides a one-year warranty for all products. In case of product quality problems (excluding wearing parts or accessories) within one year, they shall be repaired free of charge, and technical support shall be provided free of charge.

Consultation hotline 0517-86936880 15358661880

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