FTL51 Level Instrument Overview
FTL51 is a level instrument specifically designed for industrial process measurement, widely used for continuous level detection of liquids, slurries, and solid particles. Its core advantages lie in high precision, strong anti-interference capability, and long-term stability, making it suitable for industries such as chemical, water treatment, food, and pharmaceutical. This concise manual aims to help engineering technicians and procurement staff quickly understand the selection, installation, and commissioning points of the FTL51.
Core Technical Parameters
The key performance indicators of the FTL51 determine its applicable scenarios. The following table lists the main technical parameters for reference during selection.
| Parameter | Specification |
|---|---|
| Measurement Principle | Capacitive / RF Admittance |
| Measurement Range | 0 ~ 20 m (customizable) |
| Process Connection | Thread G1", Flange DN50, etc. |
| Process Temperature | -40 ~ 200 °C |
| Process Pressure | -0.1 ~ 4.0 MPa |
| Output Signal | 4-20 mA / HART / Relay |
| Protection Rating | IP67 / IP68 (optional) |
| Explosion-proof Certification | Ex ia IIC T6 Ga (intrinsically safe) |
Installation and Commissioning Steps
Correct installation and commissioning are prerequisites for ensuring the measurement accuracy of the FTL51. Please follow the steps below and pay attention to key precautions.
- Installation Location Selection: Avoid installing near feed inlets, agitators, or tank walls to prevent false echoes. It is recommended to keep at least 300 mm from the tank wall.
- Process Connection Tightening: According to the selected connection type (thread or flange), tighten with appropriate torque to ensure sealing without leakage.
- Electrical Wiring: Connect power and signal lines according to the wiring diagram, ensuring single-point grounding of the shield to avoid electromagnetic interference.
- Parameter Setting: Set the range, dielectric constant of the medium, and output mode via HART communicator or local buttons.
- Calibration Verification: Calibrate zero and span separately under empty and full tank conditions to confirm the output current corresponds correctly.
Selection Points and Common Issues
During selection, comprehensive consideration of medium characteristics, process conditions, and output requirements is necessary. The following points can help you make quick decisions.
- Medium Dielectric Constant: Low dielectric constant media (such as certain oils) require high-sensitivity models or guided wave tube installation.
- Process Temperature and Pressure: When exceeding standard ranges, high-temperature or high-pressure sealing structures must be selected.
- Explosion-proof Requirements: In explosive environments, intrinsically safe or flameproof types must be selected and used with safety barriers.
- Output Signal: When connecting to PLC/DCS, prefer 4-20 mA + HART; for local alarms, choose relay output.
- Common Issues: If the measurement value fluctuates greatly, check grounding and shielding; if it always reads full scale, check whether the probe has material buildup or a short circuit.
Maintenance and Precautions
The FTL51 is designed to be maintenance-free, but regular inspections can extend its service life. It is recommended to check probe cleanliness and terminal tightness every 6 months. Under highly corrosive or crystallization-prone conditions, the inspection interval should be shortened. During power-off maintenance, ensure that process pressure has been released to avoid danger.
For the complete FTL51 Chinese manual, please click the PDF icon above to download.