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3851/1151 series capacitive transmitter
Overview: The 3851/1151 series miniaturized capacitive pressure (differential pressure) transmitter is a new type of transmitter produced by our compa
Product details
overview
3851/1151The series of miniaturized capacitive pressure (differential pressure) transmitters is a new type of transmitter produced by our company through the introduction of advanced foreign technology and equipment. The key raw materials, components, and parts are all imported, and the whole machine has undergone strict assembly and testing. This product has advanced design principles, complete product specifications, and easy installation and use. Due to the complete integration of the structural advantages of the two most popular and widely used transmitters (Rosemount 3051 and Yokogawa EJA) in the appearance of this model, it gives users a refreshing feeling. At the same time, it can be directly replaced with traditional 1151, CECC and other series products in installation, with strong universality and substitution ability. In order to adapt to the continuous improvement and development of domestic automation level, this series of products not only has a compact and exquisite design, but also introduces intelligent functions with HART fieldbus protocol.
characteristic
★ High accuracy;
★ Good stability;
★ Two wire system (special four wire system is available);
Solid components, plug-in printed circuit boards;
★ Small, lightweight, sturdy and vibration resistant;
★ Range and zero point can be continuously adjusted externally;
★ Positive migration can reach 500%; Negative transfer can reach 600%;
★ Adjustable damping;
★ Good one-way overload protection characteristics;
★ No mechanical movable parts, low maintenance workload;
★ Unified structure across the entire series, with strong interchangeability of components;
★ The membrane material in contact with the medium can be selected;
★ (316L, TAN, HAS-C, MONEL and other corrosion-resistant materials)
★ Explosion proof structure, all-weather use;
★ Intelligent HART fieldbus protocol.
Working principle
The process pressure is transmitted to the center measuring diaphragm of the delta chamber through the isolation diaphragm on both sides or one side, and the filling liquid. The central diaphragm is a tensioned elastic element that produces corresponding deformation displacement in response to the pressure difference acting on it on both sides. Its displacement is proportional to the differential pressure, with a maximum displacement of about 0.1mm. This displacement transformation forms a differential capacitor on the capacitor plate, which is converted into a 4-20mADC signal output in a two-wire system by electronic circuits.
Function Parameter
★ Target audience: liquids, gases, and vapors
★ Measurement range: 0-0. 1kPa to 0-40MPa
★ Output signal: 4-20mADC (special for four wire 220V AC power supply, 0-10mADC output)
★ Power supply: 12-45VDC, usually 24V DC
★ Load characteristics: Related to the power supply, the load capacity at a certain power supply voltage is shown in the above figure (load characteristics), and the relationship between load impedance RL and power supply voltage VS is: RL ≤ 50 (Vs-12)
★ Indicator: pointer type linear indication with 0-100% equal division scale or LCD liquid crystal or LED digital display
★ Explosion proof: a. Explosion proof type dIIBT4
b. Intrinsically safe iaIICT6
★ Range and zero point: externally continuously adjustable
★ Positive and negative transfer: After the zero point undergoes positive or negative transfer, the absolute values of the upper and lower limits of the measuring range and measurement range cannot exceed 100% of the upper limit of the measurement range. (Intelligent type: Range ratio of 15:1) The maximum positive migration is 500% of the minimum calibration range; The maximum negative transfer is 600% of the minimum calibration range
★ Temperature range: Amplifier operating temperature range: -29~+93 ℃ (LT type: -25~+70 ℃)
Measuring element filled with silicone oil: -40~+104 ℃
When filling high-temperature silicone oil into flange type transmitters: -20~+315 ℃, ordinary silicone oil: -40~+149 ℃
★ Static pressure: 1, 4, 10, 25, 32MPa
★ Humidity: Relative humidity is 0-100%
★ Volume suction capacity: ＜ 0.16cm3
technical data
(Without migration, under standard working conditions, filled with silicone oil, 316 stainless steel isolation diaphragm)
★ Accuracy: ± 0.2%, ± 0.25%, ± 0.5%
★ Dead zone: None (≤ 0.1%)
★ Stability: Absolute value of basic error not exceeding the maximum range within six months
★ Vibration influence: In any axial direction, when the vibration frequency is 200Hz, the error is ± 0.05%/g of the upper limit of the measurement range
★ Power supply impact: less than 0.005%/V of the output range
★ Load impact: If the power supply is stable, the load will not be affected
● Selection Table
3851/1151The series of miniaturized capacitive pressure (differential pressure) transmitters is a new type of transmitter produced by our company through the introduction of advanced foreign technology and equipment. The key raw materials, components, and parts are all imported, and the whole machine has undergone strict assembly and testing. This product has advanced design principles, complete product specifications, and easy installation and use. Due to the complete integration of the structural advantages of the two most popular and widely used transmitters (Rosemount 3051 and Yokogawa EJA) in the appearance of this model, it gives users a refreshing feeling. At the same time, it can be directly replaced with traditional 1151, CECC and other series products in installation, with strong universality and substitution ability. In order to adapt to the continuous improvement and development of domestic automation level, this series of products not only has a compact and exquisite design, but also introduces intelligent functions with HART fieldbus protocol.
characteristic
★ High accuracy;
★ Good stability;
★ Two wire system (special four wire system is available);
Solid components, plug-in printed circuit boards;
★ Small, lightweight, sturdy and vibration resistant;
★ Range and zero point can be continuously adjusted externally;
★ Positive migration can reach 500%; Negative transfer can reach 600%;
★ Adjustable damping;
★ Good one-way overload protection characteristics;
★ No mechanical movable parts, low maintenance workload;
★ Unified structure across the entire series, with strong interchangeability of components;
★ The membrane material in contact with the medium can be selected;
★ (316L, TAN, HAS-C, MONEL and other corrosion-resistant materials)
★ Explosion proof structure, all-weather use;
★ Intelligent HART fieldbus protocol.
Working principle
The process pressure is transmitted to the center measuring diaphragm of the delta chamber through the isolation diaphragm on both sides or one side, and the filling liquid. The central diaphragm is a tensioned elastic element that produces corresponding deformation displacement in response to the pressure difference acting on it on both sides. Its displacement is proportional to the differential pressure, with a maximum displacement of about 0.1mm. This displacement transformation forms a differential capacitor on the capacitor plate, which is converted into a 4-20mADC signal output in a two-wire system by electronic circuits.
Function Parameter
★ Target audience: liquids, gases, and vapors
★ Measurement range: 0-0. 1kPa to 0-40MPa
★ Output signal: 4-20mADC (special for four wire 220V AC power supply, 0-10mADC output)
★ Power supply: 12-45VDC, usually 24V DC
★ Load characteristics: Related to the power supply, the load capacity at a certain power supply voltage is shown in the above figure (load characteristics), and the relationship between load impedance RL and power supply voltage VS is: RL ≤ 50 (Vs-12)
★ Indicator: pointer type linear indication with 0-100% equal division scale or LCD liquid crystal or LED digital display
★ Explosion proof: a. Explosion proof type dIIBT4
b. Intrinsically safe iaIICT6
★ Range and zero point: externally continuously adjustable
★ Positive and negative transfer: After the zero point undergoes positive or negative transfer, the absolute values of the upper and lower limits of the measuring range and measurement range cannot exceed 100% of the upper limit of the measurement range. (Intelligent type: Range ratio of 15:1) The maximum positive migration is 500% of the minimum calibration range; The maximum negative transfer is 600% of the minimum calibration range
★ Temperature range: Amplifier operating temperature range: -29~+93 ℃ (LT type: -25~+70 ℃)
Measuring element filled with silicone oil: -40~+104 ℃
When filling high-temperature silicone oil into flange type transmitters: -20~+315 ℃, ordinary silicone oil: -40~+149 ℃
★ Static pressure: 1, 4, 10, 25, 32MPa
★ Humidity: Relative humidity is 0-100%
★ Volume suction capacity: ＜ 0.16cm3
technical data
(Without migration, under standard working conditions, filled with silicone oil, 316 stainless steel isolation diaphragm)
★ Accuracy: ± 0.2%, ± 0.25%, ± 0.5%
★ Dead zone: None (≤ 0.1%)
★ Stability: Absolute value of basic error not exceeding the maximum range within six months
★ Vibration influence: In any axial direction, when the vibration frequency is 200Hz, the error is ± 0.05%/g of the upper limit of the measurement range
★ Power supply impact: less than 0.005%/V of the output range
★ Load impact: If the power supply is stable, the load will not be affected
● Selection Table
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3851/1151
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Pressure transmitter (including negative pressure)
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|||||||
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3
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0-0.6～6KPa
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||||||
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4
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0-4～40KPa
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|||||||
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5
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0-40～250KPa
|
|||||||
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6
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0-0.16～1.0MPa
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|||||||
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7
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0-0.4～2.5MPa
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8
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0-1.6～10.0MPa
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9
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0-2～25MPa
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0
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0-4.0～40MPa
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code
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output
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E
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Non intelligent type (4-20mA output)
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|||||||
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S
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Intelligent (HART protocol)
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J
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Intelligent square opening type
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code
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Structural materials
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Flanges and fittings
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Exhaust/Drain Valve
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Isolation Diaphragm
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Fill with liquid
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22
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316stainless steel
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316stainless steel
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316stainless steel
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silicone oil
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23
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316stainless steel
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316stainless steel
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Hastelloy C
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|||||
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24
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316stainless steel
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316stainless steel
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Monel
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|||||
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25
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316stainless steel
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316stainless steel
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tantalum
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|||||
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33
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Hastelloy C
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Hastelloy C
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Hastelloy C
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|||||
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35
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Hastelloy C
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Hastelloy C
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tantalum
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44
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Monel
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Monel
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Monel
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code
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option
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M1
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0-100%Linear indicator table
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M2
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LEDDigital display table
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M3
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LCDmonitor
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