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Help Center3051 Differential Pressure Transmitter, Single Flange lt Type, With hc Diaphragm or Tantalum Diaphragm, Hart Protocol, Beijing Haibo Hua
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3051 Capacitive Differential Pressure Transmitter
Overview
The 3051 intelligent capacitive differential pressure transmitter is produced by Beijing Haibohua Technology Co., Ltd. by introducing advanced foreign technologies and equipment, using key raw materials, components and parts. The whole machine has undergone strict assembly and testing, and features advanced design principles, a complete range of varieties and specifications, and easy installation and use. As the appearance of this model fully integrates the two most popular and widely used transmitters in China at present (Rosemount 3051 and Yokogawa EJA), it gives users a fresh feeling. At the same time, it is easy to be compatible with and directly replace the traditional 1151, CECC and other series of products in terms of installation. Therefore, it is a replacement and upgrade product for some old models. To adapt to the continuous improvement and development of the domestic automation level, in addition to its compact and delicate design, this series of intelligent pressure/differential pressure transmitters also features intelligent functions with HART fieldbus protocol.
Working Principle:
In this intelligent differential pressure transmitter, the process pressure is transmitted to the central measuring diaphragm in the chamber through the isolation diaphragms on both sides or one side and the filling liquid. The central diaphragm is a tensioned elastic element. It produces a corresponding deformation displacement in response to the pressure difference on both sides acting on it. The displacement is proportional to the differential pressure, with a displacement of about 0.1 mm. This displacement is converted into a differential capacitance formed on the capacitor plates, and the electronic circuit converts the differential capacitance into a standard output signal.
Technical Parameters
◆Measuring Medium:Liquids, gases and vapors
◆Measurement range:0-0.1KPa to 0-40MPa
◆Output signal:4-20mA, 1-5V, 0-5V, 0-10V
◆Power supply: 12 - 45 V DC (see Figure 2 for load characteristics) (standard is 24 V DC, can work at
12 V DC,the power supply voltage for the digital indicator head should not be lower than 17 V DC)
◆ Load characteristics:Related to the power supply. The load capacity at a certain power supply voltage is shown in Figure 2
Load impedance RL and the power supply voltage VS relationship is: RL ≤ 50(V s - 1 2)
◆ Accuracy: 1. Intelligent: ±0.2 class 2. Analog: ±0.5 class
3. Differential pressure: ±0.5 class 4. Remote transmission: ±0.5 class
5. Liquid level: ±0.5 class
◆ Indicator:Pointerlinear indication0～100%scale andLCDLiquid crystalDisplay
◆ Range and zero: Continuously adjustable externally
◆ Positive and negative migration: After the zero point is positively or negatively migrated, the upper and lower limit values of the range and measurement range
shall not exceed 100% of the upper limit of the measurement range.
The positive migration amount is 500% of the minimum calibration program; The negative migration amount is
600% of the minimum calibration program.
◆ Ambient temperature influence/ 28℃ Zero point: ±0.5％/55℃ Range: ±1.0%/55℃
◆ Temperature range:Amplifier operating temperature range:-29~+93℃
Measuring element filled with silicone oil:-40~+104℃
When the flange-type transmitter is filled with high-temperature silicone oil:15~+315℃,
Ordinary silicone oil:-40~+149℃
◆ Volume suction: 0.16cm3
◆ Damping (step response): When filled with silicone oil, it is generally continuously adjustable between 0.2s and 1.67s
◆ Dead zone: None(≤0.1%)
◆ Static pressure influence (Differential pressure transmitter)
1. Zero error (can be eliminated under static pressure)
Static pressure from 0～13.7MPa, ±0.2%/ 6.9MPa
When the static pressure exceeds 13.7MPa,±0.5%/ 6.9MPa
2. Range error ±0.25%/ 6.9MPa
◆ Stability
12 months, ±0.2%FS, in the case oftemperature 28℃, staticpressure is 6.9MPa,range1 : 1 conditions.
◆ Influence of installation position
The zero point drifts at most 250 Pa, can be corrected, with no range influence.
◆ Comprehensive performance(Based on comprehensive errors such as reference accuracy, ambient temperature, and static pressure influence)
In the 1:1 range of the transmitter, with a temperature change of 28℃ and a static pressure of 6.9MPa, it is ±0.25%
◆ Vibration influence (except for micro-ranges): In any axial direction related to the pipeline installation process conditions
Conduct 15Hz～2000Hz test, less than ±0.1%FS
◆ Power supply influence:Less than 0.005%/V
◆ RF interference influence: 20MHz～1000MHz，1 meter condition, ±0.1％FS
◆ Insulation strength and reverse protection: No arcing phenomenon occurs for 1 minute at 50Hz, 100VPP between the positive and negative terminals and the housing. No damage when reverse-connected to 24VDC.
◆ Supply voltage: 1 2 V D C～4 5 V D C (Standard is 2 4 V D C, can work at 1 2 V D C without load，
The supply voltage of the meter with digital indicator should not be lower than1 7 V D C )
◆ Operating temperature:－-20°C～+80°C
◆ Storage Temperature: -40°C～+104°C
◆ Operating Temperature:－20°C～+80°C
◆ Storage Temperature: -40°C～+104°C
◆ Relative Humidity: 0～90％RH
◆ Physical Properties:
Weight: Approximately 3.9kg (standard configuration, without installation accessories);
Height: 190mm; Cable threading hole M20×1.5 or NPT1/2
◆ Pressure connection fittings:316L stainless steel, Hastelloy C, or Monel alloy
Flange NPT1/4, center distance 54mm; Connector NPT1/2 or M20X1.5 male thread ball cone surface seal, center distance 50.8, 54, 57.2mm when with connector
NPT taper pipe thread complies with GB/T12716 - 91)
◆ Signalline connection hole:G 1 / 2＂
◆ Isolation diaphragm: 316L, Hastelloy C-276, Monel, Tantalum
◆ Exhaust/Drain valve
316L, Hastelloy C-276 or Monel are optional
◆ Sensor connection O-ring
Nitrile rubber seal ring, PTFE seal ring, Metal seal ring
◆ Electronic housing and coating
Low copper aluminum alloy, Anodizing, Polyurethane spraying
◆ Sensor filling fluid
Silicone oil, fluorine oil
◆ Watch cover and display box
10mm tempered glass, nitrile rubber or seal
◆ Overall protection performance complies with:I P 6 7 (Related parameters)
◆ Flameproof and intrinsic safety certification
Intrinsic safety type “i ” complies with GB3836.1 - 2000, GB3836.4 - 2000
Explosion-proof grade: E X i aⅡC T 6
Flameproof type “d” complies with GB3836.1 - 2000, GB3836.2～2000
Flameproof grade: E x dⅡC T 5
Features:
◆ No mechanical moving parts, sturdy and vibration-resistant
◆ Adjustable damping
◆ High precision and good stability
◆ Solid-state components, plug-in printed circuit boards
◆ Range and zero point are continuously adjustable externally
◆ Positive migration can reach 500%; negative migration can reach 600%
◆ Good one-way overload protection characteristics
◆ Unified structure for the whole series, strong interchangeability of components
◆The diaphragm material in contact with the medium is optional; 316L, TAN, HAS - C, MONEL, etc.
◆Explosion-proof structure, suitable for all - weather use; Intelligent HART fieldbus protocol
Application fields:
This intelligent pressure/ differential pressure transmitter is suitable for pressure measurement in industrial automation control occasions such as petroleum, petrochemical, chemical, electric power, city gas, pulp, papermaking, machinery, shipbuilding, steel, non - ferrous metals, ceramics, etc.
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