3051 Pressure Transmitter

3051 pressure transmitter 

Packaging & Delivery

Selling Units:

Single item

Single package size:

30X16X12 cm

Single gross weight:

1.000 kg

Package Type: carton and wooden box.

There are two commonly used output ranges for current output transmitters: 0-20mA and 4-20mA. When the current transmitter outputs the minimum and maximum current, they represent the minimum and maximum rated output values calibrated by the current transmitter.

The following is an example of a current transmitter with a measurement range of 0-100A. For transmitters with an output of 0-20mA, the 0mA current corresponds to the input 0A value, while for transmitters with an output of 4-20mA, the 4mA current corresponds to the input 0A value. The 20mA current of both types of sensors corresponds to the 100A value.

For transmitters with an output of 0-20mA, in terms of circuit design, we only need to select a suitable step-down resistor and directly convert the 0-5V or 0-10V voltage on the resistor into a digital signal at the input interface of the A/D converter. Circuit debugging and data processing are relatively simple. However, the disadvantage is that it is impossible to distinguish the damage of the transmitter, as well as the open circuit and short circuit of the transmitter output.

For transmitters with an output of 4-20mA, circuit debugging and data processing are quite cumbersome. But this type of transmitter can determine whether there is a fault in the circuit and whether the transmitter is damaged by detecting the current within the normal range (with a minimum value of 4mA during normal operation) when the transmitter circuit is not connected, in case of a short circuit or damage. Therefore, it has been widely used.

Due to the fact that when the 4-20mA transmitter outputs 4mA, the voltage on the sampling resistor is not equal to 0, and the digital quantity directly converted by the analog-to-digital conversion circuit is not 0, the microcontroller cannot directly use it, and calculating through formulas is too complex. Therefore, the general processing method is to eliminate the voltage drop generated by 4mA on the sampling resistor through a hardware circuit, and then perform A/D conversion. The first hardware circuit of this type is the RCV420, which is a precision I/V conversion circuit. There is also a self built I/V conversion circuit using LM258. This circuit consists of a current loop of 4-20mA generated by a two wire current transmitter, 24V, and a sampling resistor, which generates a 1-5V voltage drop on the sampling resistor and inputs this voltage value to the three pins of amplifier LM258. The resistive voltage divider circuit is used to generate a fixed voltage value on the 2 pins of the integrated circuit LM258, which is used to offset the voltage drop generated by the 4mA current on the sampling resistor. So when the minimum value of the two wire current transmitter is 4mA, the voltage difference between the 3 and 2 pins of LM258 is basically 0V. The LM258 and its connected resistor form an adjustable voltage amplification circuit, which amplifies the voltage value of the current of the two wire current transmitter on the sampling resistor and outputs it to the analog/digital conversion circuit through the 1 pin of LM258 for reading by the microcontroller CPU. The 4-20mA current of the two wire current transmitter is displayed as a 0-100A value on the LCD/LED screen through data processing methods.

Pressure range	-1-0~1 bar…600 bar optional
Output	4~20mA,0~5V/0~10V/0.5~4.5V
Power supply	12VDC~36VDC
Accuracy	0.5%F.S, 1%F.S
Pressure port	G1/4''; G1/2'';1/4''NPT or by customized
Electronic Port	DIN43650 Hirschman,Direclty cable,M12 4 Pin
Working temperature	35°C ~+125°C
Storage Temp	-40°C~125°C
Temp Compensation	0°C~50°C
Zero temp drift	≤0.02%F.S/°C/year
IP rating	IP65

 

 

 

 

Market	Revenue(Previous Year)	Total Revenue (%)
North America	Confidential	40
South America	Confidential	12
Eastern Europe	Confidential	3
Southeast Asia	Confidential	1
Africa	Confidential	5
Oceania	Confidential	1
Mid East	Confidential	2
Eastern Asia	Confidential	2
Western Europe	Confidential	3
Central America	Confidential	2
Northern Europe	Confidential	3
Southern Europe	Confidential	5
South Asia	Confidential	4
Domestic Market	Confidential	17

When purchasing a 3051 pressure transmitter, choose the corresponding pressure transmitter according to the specific situation, I Determine measurement medium The 3051 pressure transmitter measures the degree of erosion of the medium and selects the corresponding transmitter based on the degree of erosion. Generally speaking, transmitters with stainless steel as the isolation unit can be used for non strong acids and strong alkalis. Otherwise, only special transmitters such as titanium alloy designed for corrosion prevention can be selected. 2、 Determine the measurement range and method When selecting the measurement range, it is generally necessary to consider the actual measurement range, the overvoltage measurement range, and the range selected should be based on the maximum measurement range, while also considering the size of the overvoltage measurement range. In addition, it is necessary to choose an accurate measurement method. If measuring differential pressure, it is necessary to choose a differential pressure transmitter model series, measurement range, overpressure range, measurement method PT110/PT110S/PT210, minimum 0-0.5MPa, maximum 0-500MPa, 2 times the range (range<10Mpa), 1.5 times the range (range>10Mpa), gauge pressure YSZK310, minimum 0-50KPa, maximum 0-40MPa, 2 times the range (range<10Mpa), 1.5 times the range (range>10Mpa), gauge pressure/absolute pressure YS31/32/33 Minimum 0-1KPa, maximum 0-160MPa, 6 times range (range<20KPa), 0.2MPa (range 20-100kpa), 2 times range (range>100kpa), gauge pressure/differential pressure/absolute pressure III Determine the accuracy range, compensate for the temperature range, and use the temperature range. According to the minimum accuracy you need to measure, generally choose a product that is slightly higher than the required minimum accuracy. When selecting at the same time, it is also necessary to consider long-term stability indicators. The so-called use temperature range refers to the temperature range of the measuring medium during normal operation, and the use temperature range refers to the maximum temperature range that may arise during the use process. Generally, when selecting a model series that is slightly larger than the required temperature range, the compensation temperature range uses temperature range accuracy.   FAQ:   Q:What are the contents of the retool inspection of the intelligent transmitter? A:The content of retuning inspection of intelligent transmitter includes two aspects: function check and pressure check. Q:How does a pressure transmitter work? A:It is based on 3151 capacitive pressure sensor, using advanced microcontroller and sensorDigital measurement technology, the application of high accuracy algorithm, to ensure that the pressure signal of high precision measurement.wisdom Q:What bus technology is used in the communication interface of intelligent transmitter? A:The communication interface of intelligent transmitter is advanced HART, FF H1, PROFIBUS PA bus technology. Q:How many parts does an intelligent transmitter consist of? A:The intelligent transmitter has the same logical structure and is composed of five parts: sensor, instrument card, communication card, liquid crystal display card and terminal card.

 

 

 

 

 

 

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