Product Details

3051c transmitter is a heavyweight product in the field of pressure, liquid level, and flow measurement,  Its circuit has an anti-interference capability of over 90 dB, enabling high-speed signal processing and low-power operation. This series of transmitter products have a variety of pressure measurement ranges, which can meet the actual needs of different occasions. At the same time, the mechanical structure of this series of transmitters also has excellent performance. Its reasonable design allows it to withstand work under high voltage, and its high overload resistance level also makes it more stable when dealing with various situations of measurement.

       

1. High precision measurement: Advanced pressure measurement technology and microprocessor control are adopted to provide high-precision pressure measurement results.

2. Powerful housing: All stainless steel housing, featuring high strength and corrosion resistance, suitable for harsh working environments.

3. Programmable function: It can be programmed according to different application requirements, including output signal, range, and alarm settings.

4. Low power design: Adopt low-power processors to reduce power consumption and extend service life.

In industry, it is generally necessary to measure various electrical and non-electrical physical quantities, such as current (AD), voltage (VD), power (WD), frequency (FD), temperature (TT), weight (LD), position (Pt), pressure, rotational speed (RT), angle, etc. All of which need to be converted into acceptable DC analog electrical signals before being transmitted to a control room or display device hundreds of meters away. This device that converts the measured physical quantity into a DC electrical signal that can be transmitted is called a transmitter.

The traditional output DC electrical signals of the 3051c transmitter include 1-5 V, 4-20 mA, etc. Currently, the most widely used method in industry is to transmit analog signals using 4-20 mA current. The reason why Rosemount pressure transmitters use current signals is that they are not susceptible to interference. Moreover, the resistance within the current source is infinite, and the wire resistance in series in the circuit does not affect accuracy. It can transmit hundreds of meters on ordinary twisted pairs. The upper limit of 20 mA is due to explosion-proof requirements: the spark energy caused by switching on and off a current of 20 mA is sufficient to ignite gas. The reason why the lower limit is not taken as 0 mA is to be able to detect wire breaks and not be lower than 4 mA during normal operation. When the transmission line is broken due to a fault, the loop current drops to 0. 2 mA is often taken as the alarm value for wire breakage. Current type transmitters convert physical quantities into 4~20 mA current outputs, and external power supplies are necessary to supply them. The most typical transmitter requires two power lines, plus two current output lines, to connect a total of four lines, called a four-wire transmitter. Of course, the current output can share a line (common VCC or GND) with the power supply, which can save one line. This is called a three-wire transmitter. In industrial applications, measurement points are typically located on site, while display or control equipment is typically located in a control room or cabinet. The distance between the two can range from tens to hundreds of meters. Based on a distance of 100 meters, saving 2 wires means a cost reduction of nearly $20! Therefore, in practical use, two wire sensors are getting more and more applications.

       

The main components of the 3051c transmitter are the sensor module and the electronics housing. The sensor module includes an oil filled sensor system (isolation membrane, oil filled system, and sensor) and sensor electronics. The sensor electronics are installed within the sensor module and include a temperature sensor (resistive test detector), a storage module, and a capacitive/digital signal converter (C/D converter). The electronic signals from the sensor module are transmitted to the output electronics in the electronics housing. The electronic component housing includes an output electronic circuit board (microprocessor, storage module, digital/analog signal converter, or D/A converter), local zero and span buttons, and terminal blocks.

Rosemount 3051C transmitter have the advantages of high accuracy, reliability, and versatility. They are one of the indispensable measurement equipment in the industrial process control, and are also a high-quality product in the measurement field.

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