Kaidi Sensors guided wave radar level transmitter principle of operation supply for work

PRODUCT OVERVIEW

         The KD-FMW series sensors are 80G FM radar type level measuring instruments with a measuring distance of up to 150 meters. The antenna is further optimized and the new fast microprocessor allows for higher speed signal analysis and processing, making the instrument available for high temperature and high pressure and other environmental solids measurement.

THE PRODUCT PRINCIPLE

        The general principle of frequency modulated continuous wave radar level meter is that the radar emits electromagnetic waves at the top of the tank, and the electromagnetic waves are received by the radar after hitting the medium and reflected. Because the speed of light C and FM slope K are known, so the frequency difference δ f is estimated, and the distance R of the material surface at the radar installation position can be obtained, and then the height of the material level is obtained by subtracting the spatial distance from the radar to the material surface (referred to as the empty height) from the known total height of the tank.

PROTECTION GRADE

This instrument fully meets the requirements of protection class IP66/67. Please make sure that the cable sealing head is waterproof. As shown

How to ensure that the installation meets the requirements of IP67.

Please make sure that the sealing head is not damaged.

Please make sure that the cable is not damaged.

Please ensure that the cable used meets the requirements of the electrical connection specification.

Before entering the electrical connection, bend the cable downwards to ensure that water does not flow into the housing, see ①

Please tighten the cable sealing head, see ②

Please plug the unused electrical connections with blind plugs, see ③

PRODUCT SPECIFICATION

Measuring medium: solid

Measuring range: 0.1m~30m /0.3 ~150m 

Process connection: Flange ≥ DN80

Process temperature: -40～80℃

Process pressure: -0.1 ~ 0.3 MPa

Accuracy: ±5mm  

Protection level: IP67

Center frequency: 80GHz

Power supply: two-wire (DC24V) / four-wire (AC220V) / six-wire (DC12V~24V)

Housing: aluminum/plastic/stainless steel

Signal output: 2-wire 4.... .20mA / HART protocol / 4-wire 4.... .20mA /RS485 Modbus

APPEARANCE OF SIZE

TECHNICAL PARAMETERS

Process Links

Flange / Material PP, PTFE, stainless steel, stainless steel + PTFE flange

Material

Cast aluminum/ Stainless steel/ Plastic ABS

Housing Seal between housing and housing Silicone rubber

Housing sight glass Polycarbonate

Grounding terminal Stainless steel

Supply voltage Four-wire standard type

(198~242)V AC

Power consumption max80mA DC24V/2W

Allowable ripple ＜100Hz Uss＜1V

(100~100K)Hz Uss＜10mV

Double chamber housing

 (15-28) V DC

Four-wire system

100V AC four-wire system

Cable parameters Cable inlet/plug 1 M20x1.5 cable inlet

1 blind plug M20×15

Grounding terminal Wire cross-section 2.5mm2

Output parameters Output signal (4~20)mA/RS485Modbus

Resolution 1mm

Fault signal Current output constant; 20.5mA;22mA;3.9mA

Integration time (0~20)s, adjustable

Blind area 0.1m/0.2m/0.3m

Max. measuring interval 150m

Measuring interval approx. 1 sec (depending on parameter setting)

Adjustment time approx. 1 sec (depending on parameter setting)

Adjustment time Working storage and transportation temperature

(-40~80)℃

Process temperature

KD-FMW11S

-40～100℃

KD-FMW11

-40～80℃

KD-FMW12

-40～100℃

KD-FMW13

-40～120℃/-40-110℃(threaded connection)

KD-FMW14 -40~200℃

Relative humidity

＜95%

Pressure

Max2.5MPa

Vibration resistance

Mechanical vibration 10m/s2,(10~150)Hz

INSTRUMENT LINEARITY

INSTALLATION REQUIREMENTS

When installing the instrument, avoid installing it above the inlet, and try to avoid various objects that affect the signal, such as stirring paddles, etc.

● Under extremely complex working conditions, the instrument can work normally without any obstacle in the area of 20cm radius centered on the radar installation point.