Kaidi KD-FMF12-T Radar Level Transmitter with Remote Control via Bluetooth Connection

PRODUCT OVERVIEW

KD-FMF series sensors are 120G FM radar type level measuring instruments with measuring distance up to 35 meters. The antenna is further optimized and the new fast microprocessor allows for higher speed signal analysis and processing, making the meter usable for high temperature and high pressure and other environmental liquid measurements.

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 meter fully meets the requirements of protection class IP68, please ensure the  waterproofness of the cable sealing head. As shown below:

  How to ensure that the installation meets the requirements of IP68:

Make sure that the sealing head is not damaged. 

Make sure that the cable is not damaged.  

Make sure that the cables used meet the requirements of the electrical  connection specifications.

  Before entering the electrical interface, bend the cable downward to ensure  that water does not flow into the housing.  Please tighten the cable gland.

PRODUCT SPECIFICATION

Application: rivers, lakes, shallows 

 Measuring range: 50 meters 

 Process connection: Gantry frame, locking flange from DN65/ 2.5"  

Process temperature: -40～80℃ 

Process pressure: (-0.1～0.3) MPa  

Precision: ±2mm 

 Frequency range: 80GHz  

Protection level: IP68  

Antenna size: 42mm lens  

Power supply: DC (12-24V) / four wires  

Signal output: RS485  

Commissioning: Bluetooth/Modbus protocol  

Port rate: 115200  

Elevation compensation: with  

Temperature compensation: with  

On-site display: None  

Shell: Plastic PVDF

APPEARANCE OF SIZE

TECHNICAL PARAMETERS

INSTRUMENT LINEARITY

Product Installation

◉Preparation before installation  Please pay attention to the following items to ensure that the meter can be installed  correctly:  Please reserve enough space for installation.  Please avoid installation situations with strong vibration.  

◉Illustration and installation location

                                                                                                                             Radar water level gauge installation diagram (1)  

                                                                                                                                                         Radar water level gauge installation diagram (2)

Note: When a radar antenna emits microwaves, it has a certain emission angle. There should be  no obstacles from the lower edge of the antenna to the surface of the measured medium, and in  the area radiated by the emitted microwave beam. Therefore, shielding facilities should be  avoided as much as possible during installation, and “false echo learning” must be carried out  when necessary. Also pay attention when installing the instrument: the highest liquid level must  not enter the blind area of the measurement.

The Electrical Connection

◉Supply voltage  

Modbus-RS485

Separate the power supply and Modbus signal lines with a shielded cable respectively. For  the specific power supply voltage range, please refer to the technical data.

◉Safety guidance  Please comply with the requirements of local electrical installation regulations!  Please abide by the local regulations on the health and safety of personnel. All operations on  the electrical components of the instrument must be completed by properly trained  professionals.  Please check the nameplate of the meter to ensure that the product specifications meet  your requirements. Please make sure that the power supply voltage is consistent with the  requirements on the nameplate of the meter.  

◉Protection level This meter fully meets the requirements of protection class IP68, please ensure the  waterproofness of the cable sealing head. As shown below:  How to ensure that the installation meets the requirements of IP68:  Make sure that the sealing head is not damaged.  Make sure that the cable is not damaged.  Make sure that the cables used meet the requirements of the electrical  connection specifications.  Before entering the electrical interface, bend the cable downward to ensure  that water does not flow into the housing.  Please tighten the cable gland.

◉There are two debugging methods for radar water level gauge:  (1)Mobile phone Bluetooth debugging/connecting to the Bluetooth debugging radar through  the WeChat applet  (2) Host computer debugging/debugging through MUDBUS protocol  

◉Upper computer debugging ➱Connect to the host computer through the RS485 converter  ① RS232 interface/or USB interface  ② Radar water level gauge  ③ RS485 converter