Intelligent level transmitter is an instrument put into a certain depth in the measured liquid, applicable to petroleum, chemical, metallurgy, electric power and other industries.
Products
Intelligent level transmitter display instrument is suitable for level measurement of various media in petrochemical, metallurgy, electric power, pharmaceutical, water supply and drainage, environmental protection and other systems and industries.The compact structure, simple adjustment and flexible installation provide convenience for users to use easily. 4～20mA, 0～5v, 0～10mA and other standard signal output methods are selected by users according to their needs.
Working Principle
Principle of hydrostatic pressure measurement:
When the intelligent level transmitter is put into the measured liquid at a certain depth, the sensor facing the liquid surface is subjected to the pressure formula: Ρ = ρ .g.H + Po where:
P: transmitter facing the liquid surface of the pressure
ρ: density of the liquid to be measured
g: the acceleration of the local gravity
Po: atmospheric pressure on the surface of the liquid
H: the transmitter is put into the depth of the liquid
At the same time, through the stainless steel guide will be the introduction of the liquid pressure into theAt the same time, through the air-conducting stainless steel will be introduced into the liquid pressure to the positive pressure chamber of the sensor, and then the liquid surface of the atmospheric pressure Po and the sensor is connected to the negative pressure chamber in order to offset the sensor back of the Po, so that the sensor measured pressure: ρ .g.H, obviously, by measuring the pressure P, you can get the depth of the liquid level.
Functional Features
1. Good stability, fullness, zero long-term stability of up to 0.2%FS / year.In the compensation temperature range of 0 to 70 ℃, the temperature drift is less than 0.2%FS, and less than 0.5%FS in the whole allowable working temperature range.
2. With reverse protection and current limiting protection circuit, the transmitter will not be damaged by reversing the positive and negative poles during installation, and the transmitter will automatically limit the current within 30mA in case of abnormality.
3. Solid state structure, no moving parts, high reliability, long service life.
4. Easy to install, simple structure, economical and durable.
Main technical parameters
Measuring range: 0-0.1 m ~ 0-35 m
Maximum overload: not more than 1.5 times the length of the tube
Measuring form: balanced cover type
Accuracy: 0.5% F - S
Power supply voltage: 24VDC
Load resistance: ≤ 500 Ω
Measuring medium: a variety of liquids
Long-term stability: ± 0.2% F - S/year
Relative humidity of the environment: 0 ~ 95%
Compensation Temperature: 0 ~ 70 ℃
Operating temperature: -40 ~ 240 ℃
Maximum temperature can be 350 degrees (customized)240 ℃ Maximum temperature can be 350 degrees (to be customized)
Structural characteristics
Shell: Die-casting alloy aluminum
Body structure material: 1Cr18Ni9Ti
Electrical interface: M20×1.5
Commissioning method
Unscrew the protective cover, you can see the zero and full range resistor, external standard power supply and ammeter(0 . 2 poles or more), can be adjusted, the steps are as follows:
1. In the absence of liquid in the transmitter, adjust the zero resistor, so that the output current 4 m A,
2. The transmitter is added to the full scale, adjust the full range resistor, so that the output current 20 m A,
3. Repeat the above steps two or three times, until the signal is normal.Repeat the above steps two or three times until the signal is normal.
4. Tighten the protective cover when the adjustment is finished.
Caveat
1. All supplied products come with instruction manuals and certificates of conformity, which have product numbers, technical parameters, date of shipment, etc. Please check carefully so as not to use them incorrectly.
2. When connecting the power supply, it should be connected in strict accordance with the wiring instructions of our company.
3. When abnormalities are found in use, turn off the power, stop using and check, or contact our technical department directly.
4. The original package should be restored during transportation and storage, and stored in a cool, dry and ventilated warehouse.
5. 18 months warranty.
Performance Advantages
It can convert the changes of various level parameters into standard current signals, which can be remotely transmitted to the operation and control room for centralized display, alarm or automatic control by secondary instruments or computers.Its good structure and installation method can be applied to the continuous detection of liquid level, material level or material level under the special conditions of high temperature, high pressure, strong corrosion, easy crystallization, anti-clogging, anti-crystallization, as well as solid powdery and granular materials, etc. It can be widely used in the detection and control of various industrial processes.
Characteristics:
Simple construction: no moving or elastic elements, therefore extremely reliable and low maintenance.
Easy to install: the internal structure especially shows this feature, without any special tools.
Convenient adjustment: the two potentiometers of zero and range can be used to migrate the zero point or change the range arbitrarily within the effective range of liquid level detection, and the two adjustments do not affect each other.
Widely used; suitable for high temperature and high pressure, strong corrosion and other media level measurement.
Main technical indicators
Effective detection range: 0-0.2-20m
Accuracy: 0.5 level, 1 level, 1.5 level
Pressure range: negative pressure, atmospheric pressure, high pressure (below 32MPa) Operating temperature: -50 ~ 240 ℃
Ambient temperature: -20 ~ 75 ℃
Applicable media: acid, alkali, salt, or any medium that is non-corrosive to PTFE Output signal: 4-20mA, 2-wire
Power supply:Load resistance 0-750Ω DC24V
Fixing mode: threaded installation M20 × 1.5, M27 × 2 Flange installation DN15, DN25, DN50, DN80
Field display: analog display 0-100%, digital display, field depth
