The P30 series pressure/differential pressure transmiter comes in various structural forms and is designed with fully isolated circuit technology, capable of accurately measuring gauge pressure, absolute pressure, differential pressure, flow, vacuum degree, and liquid level. This product has been widely applied in pressure measurement in industries such as petroleum, chemical engineering, metallurgy, power, food, papermaking, medicine, mechanical manufacturing, scientific experiments, and aviation and military fields.
The P30 series transmitters, due to the adoption of fully isolated circuit technology design, isolate the power supply and sensor signals,significantly enhancing the stabilityand anti-interference capabilityoftheentremachinebesidesthethreebasicfunctionkeysforadjustingzeropointrange and fine-tuning zero pressure that are common in previous inteligent transmitters, it also features three keys on the display that can be combined to perform online passive migration, set the display engineering quantity unit, linear/square root conversion, set damping time and fixed current output, etc.
The P30 series transmitters also feature a parameter data backup and restore function. When data is damaged, the damaged data can be restored online through three buttons, and the modified data can be backed up immediately. The functions of the transmitter's buttons can all be realized by the communication software or handheld terminal produced by the company.
High precision, with a range ratio of 10:1
The measurement range is from 160 Pa to 40 MPa.
The process isolation diaphragms are made of 316L stainless steel, Hastelloy,tantalum diaphragms,Monel, etc.
Simple in structure and easy to install, it can be directly installed on the pipeline for measurement.
Compound range,capable of measuring negative pressure
It offers good value for money.
The pressure sensor used in the P30 series pressure transmitter is essentially a differential capacitance type. The process pressure (liquid, gas or steam) acts on the isolation diaphragm of the pressure chamber on one side of the transmitter and is transmitted to the "filling fluid" and then to the "central measurement diaphragm" inside through the "filling fluid". When measuring absolute pressure the reference pressure is zero pressure: when measuring gauge pressure, the reference pressure is atmospheric pressure; when measuring differential pressure, the reference pressure is the pressure at the low-pressure end. The pressure is transmitted to the other side of the "central measurement diaphragm" in the same way. The "central measurement diaphragm" is a tensioned elastic element, which, together with the two capacitance plates on both sides, forms a differential capacitance.
When subjected to pressure，the "central measurement diaphragm" undergoes displacement deformation,the magnitude of which is proportional to the pressure or differential pressure. The maximum displacement is approximately O.1mm. The displacement deformation of the "central measurement diaphragm" under pressure forms a capacitance difference signal on the "capacitance plates".The electronic components ultimatelyconvert this capacitance differencesignal into a two-wire DC (4~20)mAsignal output. The capacitance between the "central measurement diaphragm" and the two capacitance plates is approximately 15OPF each.
Performance parameters
| Accuracy level | 0.075 grade, 0.1 grade, 0.2 grade, 0.5 grade |
| stability | ±0.2% of the maximum range within 12 months |
| Temperature influence | The temperature coefficient of the transmitter shall not exceed the provision. |
| Insulation performance | When the temperature is between 15 and 35 degrees Celsius and the humidity is between 45 and 85% The insulation resistance between the output terminal of the transmitter and the housing shall not be less than 20 MΩ; when a test voltage of 500 V at a frequency of 50 Hz is applied Under pressure for 1 minute, there was no breakdown or arcing phenomenon. |
| Mechanical vibration | Vibration frequency: 50Hz; full amplitude: 0.2mm; vibration for 2 hours. The lower limit value and range variation of measurement < 0.075%. |
| Installation location influence | When the transmitter is tilted ± 10 o at the installation position, its measurement is affected. The variation of the limit value and range should not exceed the absolute value of the basic error. One third of the pressure or 200 Pa (whichever is greater). |
| Static pressure influence | The effect of static pressure only applies to transmitters that measure differential pressure. And it is expressed as: The lower limit value and the variation of the range are used to measure it. Its static pressure shadow does not Beyond the range of Table 2. |
| Range and zero point | The measurement range and zero point can be adjusted either by local measurement or by HART. Remote adjustment by hand controller. |
Electrical performance indicators
| Output | Two-wire (4~20) mA isolated DC signal superimposed with HART digital signal Signal output can be selected as linear or square root output, with a maximum output current of no more than 22 mA. |
| Power supply | The commonly used working power supply is 24VDC. When there is no load, the transmitter can be in operation. Operates at 16VDC, with a maximum operating power supply of 32VDC, and supports HART communication. (At this time, the power supply range is (18.5~32) VDC.) |
| Load range | The load capacity of a transmitter is related to its power supply. The load resistance RL The relationship with the power supply voltage Vs is as shown in Figure 1. |
| Safety protection | It has strong anti-static shock, surge current and overload protection functions. |
Regional ManagerManager Peng
Contact number86-18030837175
Regional ManagerManager Zeng
Contact number86-18520508508
Regional ManagerManager Jiang
Contact number86-13324545911
Regional ManagerManager Gao
Contact number86-13871508295
Regional ManagerManager Yuan
Contact number86-13711120640
