3151GP Gauge pressure transmitter

             3151GP Gauge pressure transmitter

Overview

 3151GP Gauge pressure transmitter, as an intelligent on-site differential pressure parameter detection instrument, is used to measure the pressure and liquid level parameters of various media in liquid, gas and steam states. It converts the measured differential pressure parameters into 4-20mA standard electrical signal output, and adopts HART protocol at the same time, which has the function of communicating with the hand communicator or the upper computer. The transmitter has the function of output parameter configuration, which can adapt to different users. needs. It can accurately measure differential pressure, liquid level, vacuum and specific gravity.

The transmitter has a dust-proof structure, which is convenient and simple to install, use and adjust. The terminal blocks and electronic circuit board are placed in a sealed electrical compartment on the top of the transmitter and are isolated from each other. So when field wiring, the amplifier still works in a sealed state. The transmitter has reverse polarity protection measures to prevent damage to the transmitter due to power connection. The volume change during operation is less than 0.16 ml, which can prevent the liquid column of the measured medium from changing too much, so there is no need to add a condenser or liquid level cylinder to compensate for the volume change. The parts of the transmitter in contact with the measured medium are made of 316L stainless steel. The use of surface-mounted electronic components and plug-in design and manufacture of printed circuit boards makes it less faulty, easy to maintain, and has strong versatility, reducing spare parts and maintenance costs.

Working principle of 3151GP Gauge pressure transmitter

The two pressures of the measured medium of the pressure transmitter are passed into the high and low pressure chambers, acting on the isolation diaphragms on both sides of the delta element (ie the sensitive element), and transmitted to the measuring membrane through the isolation diaphragm and the filling liquid in the element slice on both sides. The measuring diaphragm and the electrodes on both sides of the insulating sheet each form a capacitor.

When the pressure on both sides is inconsistent, the measuring diaphragm will be displaced, and its displacement is proportional to the pressure difference, so the capacitances on both sides are not equal. Through the oscillation and demodulation links, it is converted into a signal proportional to the pressure. The working principle of pressure transmitter and absolute pressure transmitter is the same as that of differential pressure transmitter, the difference is that the pressure in the low pressure chamber is atmospheric pressure or vacuum.

The A/D converter converts the current from the demodulator into a digital signal, the value of which is used by the microprocessor to determine the input pressure value. The microprocessor controls the operation of the transmitter. Additionally, it performs sensor linearization. Reset the measurement range. Engineering unit conversion, damping, square root, sensor trimming and other operations, as well as diagnostics and digital communications.

Features of 3151GP Gauge pressure transmitter

1. Measuring range: 0-0.15kPa～42MPa, a variety of options, flexible application, can meet the needs of most users.

2. The structure is small, sturdy and anti-vibration. Integrated junction box and local zero and span adjustment and LCD display configuration buttons simplify installation, calibration and operation.

3. Non-contact local zero point, range adjustment and LCD liquid crystal display parameter configuration buttons are designed on the transmitter shell, which is convenient for on-site adjustment of zero point and range and setting required on-site display parameters.

4. The use of solid, plug-in printed circuit boards and modular structure is helpful for troubleshooting and reducing spare parts inventory display parameters.

5. The damping is adjustable, which improves the user's selectivity.

6, intelligent circuit, user-friendly operation.

7. It has independent anti-electromagnetic interference circuit and software anti-interference design, which improves the reliability of the product.

8. There is a sensor for measuring temperature parameters inside, which improves the compensation performance of the ambient temperature of the transmitter. Since the sensor is in direct contact with the measured medium, the temperature information of the medium in contact with the sensor can be obtained at the same time.

9. The on-site digital display table configured by the transmitter can directly display the measured pressure value, the output analog current value, the ratio of the measured pressure corresponding to the set range, and the temperature value of the sensor body and the medium it is in contact with. This technology has been applied for.

10. The transmitter improves the fault recovery ability and greatly reduces the maintenance workload of the transmitter.

11. The LCD liquid crystal display table adopts multi-parameter circular display mode to work.

12. With the HART protocol remote communication function, while realizing pressure measurement, the temperature detection function of the sensor body and the contacted medium is added, which provides users with more on-site working condition information, which is beneficial for users to improve the effect of process control.

13. The delta chamber structure design of the differential capacitive pressure sensor with all-metal sealing enables significant improvement and good stability in differential pressure (pressure) and temperature measurement.

Main tech data of 3151GP Gauge pressure transmitter

The temperature range of the medium in contact with the sensor: -40～85℃

Output signal: 4～20 mA DC pressure parameter analog signal and pressure, temperature digital signal, using HART protocol

Main configuration functions: zero point migration, range, engineering unit, damping time, over-limit alarm output, output 4-20 mA current calibration, write data protection, output function, factory data recovery

Flameproof type: ExdⅡCT6

Intrinsically safe: ExiaⅡCT6

Shell protection grade: IP67

3151GP Accuracy: 0.075

 Selection code table of 3151GP Gauge pressure transmitter

Note: Any special design or question of 3151GP Gauge pressure transmitter , kindly contact the manufacturer for more details.