Radar Level Transmitter FMR20B Chinese Manual Download
This page provides the PDF download of the radar level transmitter FMR20B Chinese manual, covering the entire process of product installation, wiring, parameter setting, and maintenance. Engineering technicians and procurement personnel can click the link below to obtain the complete document.
Download Radar Level Transmitter FMR20B Chinese Manual.pdf
FMR20B Radar Level Transmitter Product Overview
FMR20B is a radar level transmitter using frequency modulated continuous wave (FMCW) technology, suitable for continuous level measurement of liquids, slurries, and granular solids. Its non-contact measurement method can effectively avoid the effects of medium corrosion and adhesion, and is widely used in water treatment, chemical, petroleum, and food industries.
Core Measurement Principle
The instrument emits high-frequency radar waves and receives echoes reflected from the material surface. By calculating the frequency difference, the distance is obtained, and then combined with the tank height, the level or material level is converted. This principle is not affected by changes in medium temperature, pressure, or density, and has high measurement accuracy.
Key Technical Parameters
The following are typical technical specifications of the FMR20B. Refer to the manual for details.
| Parameter | Typical Value/Range |
|---|---|
| Measurement Principle | FMCW Radar |
| Frequency Range | 80 GHz |
| Measurement Range | 0~20 m (depending on working conditions) |
| Accuracy | ±2 mm |
| Process Temperature | -40~+200°C |
| Process Pressure | -1~+40 bar |
| Output Signal | 4~20 mA / HART / Modbus |
| Protection Rating | IP66/IP68 |
Installation and Commissioning Steps
Correct installation and commissioning are key to ensuring measurement accuracy. Please follow the steps below.
Installation Precautions
- The installation position should avoid the feed inlet, agitator, and tank wall to prevent false echoes.
- The instrument axis should be perpendicular to the material surface, with a recommended tilt angle of less than 3°.
- For flange installation, ensure the antenna extends out of the nozzle to avoid nozzle reflection interference.
- Under high-temperature or corrosive conditions, appropriate antenna materials and sealing forms should be selected.
Commissioning Procedure
- Power on and confirm that the instrument self-test passes and the display is normal.
- Connect the instrument via HART communicator or commissioning software.
- Set basic parameters such as tank height, medium type, and output range.
- Perform false echo suppression (empty tank calibration) and record the interference echo curve.
- Perform full tank calibration to verify that the 4~20 mA output matches the actual level.
- Save the parameters and exit, then observe measurement stability.
Common Faults and Handling
If measurement abnormalities occur during use, refer to the table below for quick troubleshooting.
| Fault Symptom | Possible Cause | Handling Method |
|---|---|---|
| No echo or signal loss | Antenna scaling, medium dielectric constant too low | Clean the antenna, select a higher sensitivity model |
| Large measurement fluctuation | Agitation, foam, condensation | Enable filtering function, adjust installation position |
| Output current constant | Incorrect range setting, loop fault | Check range and wiring, recalibrate |
| Display value inconsistent with actual | Reference zero offset, false echo | Re-execute empty and full tank calibration |
Selection and Procurement Recommendations
When purchasing the FMR20B, please confirm the following information according to actual working conditions:
- Process Connection: Flange specification, thread size.
- Antenna Material: PTFE, stainless steel, etc., must be compatible with the medium.
- Output Signal: 4~20 mA, HART, or Modbus, matching the control system.
- Certification Requirements: Explosion-proof, sanitary, classification society, etc.
It is recommended to request the Chinese manual and selection sample to ensure the instrument fully matches the site conditions.