Introduction to Radar Level Gauge

YRD708Introduction to Radar Level Gauge

Radar level gauge is a liquid level measurement instrument based on microwave technology, which is characterized by high precision, non-contact measurement, and strong adaptability,
Widely used for liquid level monitoring in industries such as chemical, petroleum, food, and pharmaceutical. The following are the detailed installation steps and precautions for radar level gauges:

1、 Preparation before installation

Confirm installation location

Avoid interference sources: Ensure that the radar level gauge antenna is kept at a safe distance (usually ≥ 300mm) from the mixer, feed inlet, manhole, etc., to avoid false echoes.

Consider blind spots: Radar level gauges have measurement blind spots (usually 0.3-1 meters), and it is necessary to ensure that the installation height meets the blind spot requirements.

Vertical installation: The antenna should be perpendicular to the liquid surface, with a tilt angle of ≤ 3 °.

Check the integrity of the equipment

Check the equipment model and specifications, and inspect whether the antenna, flange, cable and other components are intact.

Prepare installation tools (wrench, sealant, grounding wire, etc.).

Environmental Assessment

Confirm the medium characteristics (temperature, pressure, corrosivity, steam, foam, etc.), and select appropriate antenna materials (such as PP, PTFE, stainless steel, etc.).

Assess whether there is electromagnetic interference in the installation environment (such as frequency converters, motors).

2、 Installation steps

1. Install flanges or brackets

Flange installation: Align the radar level gauge flange with the container flange, fix it with bolts, ensure the sealing surface is flat, and apply sealant to prevent leakage.

Bracket installation: If bracket installation is used, it is necessary to ensure that the bracket is firm and the antenna verticality meets the requirements.

2. Connect the cable

Power and signal lines: Connect the power line (usually 24VDC) and signal line (4-20mA or HART protocol) according to the instrument manual.

Grounding treatment: Ground the instrument casing to prevent static interference.

3. Antenna protection

Installation of protective cover: In corrosive or high-temperature environments, a protective cover should be installed to protect the antenna.

Avoid obstruction: Ensure that there are no obstacles around the antenna to prevent signal attenuation.

4. Parameter settings

Range setting: Set the range according to the actual liquid level range (such as 0-10 meters).

Blind spot adjustment: Adjust the blind spot parameters according to the instrument manual.

Echo processing: Enable false echo control function to reduce interference.

3、 Debugging and Testing

Empty tank debugging

In the absence of a medium, perform empty tank debugging and observe whether the instrument display is stable.

Record the echo signal strength when the tank is empty.

Full tank test

Inject the medium to the full tank and check if the instrument display value matches the actual liquid level.

Adjust parameters such as gain and filtering to optimize measurement performance.

stability test

Observe the stability of the instrument under conditions such as medium fluctuations and temperature changes.

Check for false echoes or signal loss.

4、 Precautions

safe operation

In flammable and explosive environments, explosion-proof radar level gauges should be selected and relevant safety regulations should be followed.

Power off operation is required during installation to avoid the risk of electric shock.

maintenance

Regularly clean the surface of the antenna to prevent scaling or corrosion.

Check if the cable connection is loose to ensure normal signal transmission.

Special media processing

Steam: It is necessary to install a waveguide or choose a low-frequency radar level gauge.

Foam: use low-frequency radar or guided wave radar to reduce the impact of foam.

Low temperature medium: Choose low-temperature antenna materials to prevent brittle cracking.

5、 Summary

Introduction to YRD708 Radar Level Gauge

The installation of radar level gauges requires comprehensive consideration of medium characteristics, environmental interference, installation location, etc.