4-20mA hart protocol for intelligent differential pressure transmitter for measuring mechanical equipment pressure difference

Product Description

The JC-3000-C-FBHT intelligent differential pressure transmitter is used to measure the pressure or differential pressure of liquids, gases, or vapors in mechanical equipment. The use of fully sealed capacitors or silicon differential pressure sensing components ensures high measurement accuracy while ensuring excellent stability and reliability in pressure measurement. The 3501 series products can be configured with the HART communication protocol, which can communicate with control systems or manual operators for setting, monitoring, testing, and configuration.

Parameter specifications

Pressure range: -6-6MPa (customizable within the range, such as 0-100KPa, -150-100KPa)

Working temperature range: -20~80 ℃

Pressure core: capacitive type

Compensation temperature range: -20~80 ℃

Output signal: 4-20Ma, HART protocol, RS485 (customizable)

Power supply voltage: 24 (12-36) VDC

Comprehensive accuracy: 0.075 level, 0.1 level, 0.2 level (default)

Material: 316L (customizable)

Non linearity: 0.2% of full scale

Process connection: 1/4NPT, waist joint (1/2NPT) (customizable)

Repeatability: 0.05% of full scale

Electrical connection: direct leads, terminal blocks

Long term stability: ± 0.2% FS

Protection level: IP65

Mechanical vibration: ± 20g

Explosion proof grade: BT6

Response frequency: 3.2KHz (-3dB)

Selection basis

(1) Measurement range, required accuracy, and measurement functions;

⑵ The environment faced by the measuring instrument, such as the industrial environment of petrochemical industry, has the presence of hot (toxic) and explosive hazardous atmospheres, and has high environmental temperatures;

The physical and chemical properties and state of the tested medium, such as strong acid, strong alkali, viscosity, easy solidification, crystallization, and vaporization conditions;

Changes in operating conditions, such as changes in medium temperature, pressure, and concentration. Sometimes, it is also necessary to consider the changes in gas and liquid phase concentrations and densities from driving until the parameters reach normal production;

The structure, shape, size, equipment accessories inside the container, and various inlet and outlet material pipe openings of the tested object container should be considered, such as towers, solution tanks, reactors, boiler drums, vertical tanks, spherical tanks, etc;

Other requirements, such as environmental protection and hygiene requirements;

The selection of engineering instruments should have a unified consideration, requiring the reduction of specifications and varieties as much as possible, as well as the reduction of spare parts, in order to facilitate management;

Actual process situation:

① To determine the physicochemical properties and cleanliness of the medium, conventional differential pressure transmitters and float type liquid level transmitters should be selected, and the material of the part in contact with the medium should also be selected;

② Single flange differential pressure transmitter can be used for some suspended solids, foam and other media. Some are prone to precipitation and crystallization, using plug-in double flange differential pressure transmitters;

③ Consider which type of device the tested object belongs to. For tanks and tanks, if the volume of the tank is small, the measurement range will not be too large. If the volume of the tank is large, the measurement range may be large;

④ For the liquid level of high viscosity media and high-pressure equipment, as the equipment cannot be opened, a radio frequency liquid level gauge can be selected for measurement;

⑤ In addition to measurement methods and technical issues, there is also investment in instruments.