Particularly Low Dielectric Constant Liquid -40℃ Radar Type Level
Sensor
Installation Guide
Within the measurement range, determined not to come into contact
with the cable or rod internal obstacles, Therefore, the
installation should be avoided as far as possible the tank
facilities, such as: human ladder, limit switches, heating devices,
stand etc. Also note that the cable or rod may not intersect with
the material during feeding.
Also note that when installing the meter : Highest Level measurement can not enter into the blind; Must be
maintained between the instrument and the tank wall a certain
distance; When the meter is installed, try to stick with cable or
perpendicular to the surface of the measured medium. Meter
installation in hazardous areas must comply with state regulations
explosion hazardous installation area. Intrinsically safe
instrument requires the use of shell with aluminum. Intrinsically
safe instrument can be installed in explosion-proof requirements of
the occasion, the instrument must be connected to the earth.
The following guidelines apply to the installation of the cable and
the rod radar level measuring solid powder or liquid.
Installation position:
1. Far away from the discharge port and inlet.
2. Metal cans in the entire measuring range, not to touch the tank
wall and tank bottom.
3. Recommended meter installed in 1/4 or 1/6 of the silo diameter,
and the minimum distance is 1/10 of the tank wall of the measuring
range.
4. Cable type or rod probe the minimum distance from the tank wall
≥300mm.
5. Bottom of the probe from the tank bottom ≥30mm.
6. The minimum distance from the probe obstructions ≥200mm.
7. If the bottom of the container is a cone, you can install a
central tank top.
| Suitable for Medium: | Liquids, particularly low dielectric constant liquid |
| Application: | Measuring No ion water, deoxygenated water and other liquids |
| Explosion-proof Grade: | Exia IIC T6 Ga/Exd IIC T6 Gb |
| Measuring Range: | 6m |
| Antenna: | Coaxial tube type antenna |
| Accuracy: | ±50mm |
| Process Temperature: | (-40～250)℃ |
| Process pressure: | (-0.1～4)MPa |
| Signal output: | (4～20)mA/HART |
| The Scene Display: | Four LCD/Can be programmed |
| Power Source: | Two-wire (DC24V), Four-wire(DC24V/AC220V) |
| Shell: | Aluminum /Plastic |
| Connection: | Flange (optional) / Thread |
| Frequency: | 500MHz-1.8GHz |
The sound wave is a mechanical wave with a density of 40; gas,
liquid and solid 41; propagation depends on the influence of the
medium, temperature and pressure on the measurement. Need
temperature compensation. Temperature and pressure measurement are
generally not applicable. First of all, the ultrasonic level gauge
has a temperature limit. Generally speaking, the temperature of the
probe cannot exceed 80 degrees, and the propagation speed of sound
waves is greatly affected by temperature. Secondly, the ultrasonic
level gauge is greatly affected by the pressure, generally within
0.3MPa, because the ultrasonic wave is emitted by the vibration of
the piezoelectric material. When the pressure is too high, the
sound part will be affected. Third, when the fog or dust in the
measurement environment is large, the measurement effect is not
good. The radar level gauge emits high-frequency pulses and
propagates along the cable. When the pulse is in contact with the
material surface, it is reflected by the receiver inside the
instrument and the distance signal is converted into a material
level signal. The electromagnetic wave is used as the detection
signal, which is reflected to the interface as the dielectric
constant changes. Electromagnetic waves can propagate in vacuum
without being affected by changes in temperature and pressure.
Therefore, it can be used in a high temperature and high pressure
environment. The measurement of very low dielectric constant media
is not applicable. The radar tube uses electromagnetic waves and is
not affected by the degree of vacuum. It has a wide range of
applications in terms of medium temperature and pressure. The
emergence of high-frequency radar tubes makes the application range
of radar tubes wider. Therefore, the radar tube is an
ideal choice for level measurement.
