Input type transmitter

Introduction: Input type transmitter Overview: Input type transmitter is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It uses isolated diffusion silicon sensitive elements or ceramic capacitive pressure sensitive sensors to convert static pressure into electrical signals, which are then temperature compensated and

Overview of Input Transmitter:

The input transmitter is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It uses isolated diffusion silicon sensitive elements or ceramic capacitive pressure sensitive sensors to convert static pressure into electrical signals

After temperature compensation and linear correction, it is converted into standard electrical signals (such as 4-20mA, etc.), and the 2088 indicator head can also achieve real-time display of water level on site.

Application of immersion transmitter

The input transmitter is used for liquid level measurement and control in rivers, groundwater levels, reservoirs, water towers, and containers. It is a sensor that measures the pressure of a liquid and converts it into a liquid level. Its principle is

The static pressure of the measured liquid is directly proportional to the height of the liquid. The input type liquid level transmitter can be divided into two types: whether it needs to have a display and whether it needs remote transmission. The sensor core usually adopts diffusion

Silicon piezoresistive, ceramic capacitor, or sapphire have characteristics such as measurement accuracy, compact structure, and stability. When choosing an input transmitter, it is important to first consider the application scenario. If it is used in a corrosive environment

To choose a sensor with high protection level and anti-corrosion, attention should also be paid to the size of the liquid level sensor range and the requirements of the interface. Application of input type transmission sensors in water plants, sewage treatment plants, urban water supply

Measurement of liquid levels in high-rise water tanks, wells, mines, industrial water tanks, water tanks, oil tanks, oil tanks, hydrogeology, reservoirs, rivers, oceans, and other places. The circuit adopts anti-interference signal isolation amplification and cutoff frequency

Interference design, overvoltage protection, current limiting protection, impact resistance, anti-corrosion design, etc.

Functional characteristics of input transmitter

1. Stability, with a long-term stability of 0.1% FS/year at full load and zero position. Within the compensation temperature range of 0-70 ℃, the temperature drift is below 0.1% FS, and within the entire allowable operating temperature range, it is below

0.３%FS 。

2. It has reverse protection and current limiting protection circuits. During installation, reversing the positive and negative poles will not damage the transmitter. In case of abnormalities, the transmitter will automatically limit the current to within 35MA.

3 Solid state structure, no movable parts, high reliability, and service life.

4. Direct investment, easy installation, simple structure, economical and durable.

Measurement method of immersion transmitter: immersion type, immersion type

Performance of input transmitter

Its mechanical structure has resistance to overload and corrosive media

2. Accurate and stable ceramic capacitors and imported diffused silicon measurement units

3 sealed electronic modules and dual filtering pressure compensation system can resist the impact of on-site climate change

A module with 4 electronic modules capable of outputting 4... 20mA signals and also equipped with overvoltage protection

5. The integrated temperature sensor Pt100 can measure both level and temperature simultaneously

Input transmitter parameters:

1. Measurement range: 0.3-100m (customizable)

2. Accuracy: 0.2, 0.5, 1.0 levels

3. Working temperature: -20~80 ℃

4. Output signal: 2-wire 4-20mADC

5. Power supply voltage: standard 24VDC (12-36VDC)

6. Non sensitive area: ≤± 1.0% FS

7. Load capacity: 0-600 Ω

8. Relative temperature: ≤ 85%

9. Protection level: IP68

10. Explosion proof mark: Exia Ⅱ CT4-6

Debugging method for input transmitter

The input transmitter has been calibrated according to the range marked on the nameplate at the time of leaving the factory. As long as the density and other parameters of the medium meet the requirements of the nameplate, there is generally no need to adjust them. If you need to adjust the range or zero position, please follow the steps below

Method tuning:

1. Unscrew the protective cover and connect it to a standard 24VDC power supply and ammeter (requiring an accuracy of 0.2% or higher) for adjustment

2. In the absence of liquid in the input type liquid level transmitter, adjust the zero point resistor to output a current of 4mA

3. Add liquid to the full range of the input type liquid level transmitter, adjust the full range resistor to output a current of 20mA

4. Repeat the above steps two or three times until the signal is normal

5. Please input signals of 25%, 50%, and 75% respectively to verify the error of the input type liquid level transmitter

6. For non-aqueous media, when calibrating the input level transmitter with water, the pressure generated by the actual density of the medium used should be converted. For example, when the medium density is 1.3, a 1.3m water level should be used to calibrate the 1m range

7. Adjustment completed, tighten the protective cover