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Capacitive pressure transmitter
Brief introduction: The CKY3051 capacitive pressure transmitter is a pressure instrument with a microprocessor as its core. It adds communication and
Product details
Details introduction:
Capacitive pressure transmitter CKY3051
Capacitive pressure transmitter is a pressure instrument with a microprocessor as its core, which adds communication and other functions to the structure of traditional capacitive transmitters. The communication controller or other host using the HART protocol can be used for bidirectional communication (reading, writing data, and diagnosis) with it in the control room, transmitter site, or anywhere connected to the control circuit. Intelligent capacitive transmitters can be used in measurement places for gauge pressure, differential pressure, flow rate, liquid level, and specific gravity, and have been widely used in industries such as petroleum, chemical, metallurgy, power, and food.
Capacitive pressure transmitter is a pressure instrument with a microprocessor as its core, which adds communication and other functions to the structure of traditional capacitive transmitters. The communication controller or other host using the HART protocol can be used for bidirectional communication (reading, writing data, and diagnosis) with it in the control room, transmitter site, or anywhere connected to the control circuit. Intelligent capacitive transmitters can be used in measurement places for gauge pressure, differential pressure, flow rate, liquid level, and specific gravity, and have been widely used in industries such as petroleum, chemical, metallurgy, power, and food.
IIProduct Features
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·High precision;
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·Good stability;
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·Two wire system (special four wire system)
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·Solid components, plug-in printed circuit boards;
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·Durable and vibration resistant;
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·RangeZero point external continuous adjustable；
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·Positive migration can reach 500%; Negative transfer can reach 600%;
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·Intelligent range ratio 10:1;
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·Adjustable damping;
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·Good one-way overload protection characteristics;
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·No mechanical movable parts, low maintenance workload;
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·Unified structure across the entire series, with strong interchangeability of components;
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·The membrane material in contact with the medium can be selected; 316 stainless steel, tantalum, Hastelloy C, Monel and other corrosion-resistant materials;
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·Explosion proof structure, all-weather operationUse it.
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OneWorking principle
The process pressure is transmitted to the central 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 acts on the pressure difference on both sides (for GP gauge pressure transmitters, atmospheric pressure is directly applied to the low pressure side of the central diaphragm; for AP absolute pressure transmitters, the low pressure side always maintains a reference pressure), causing it to produce corresponding deformation displacement. The displacement is proportional to the differential pressure, with a maximum displacement of about 0.10mm. This displacement forms a differential capacitor on the capacitor board, which is converted into a 4-20mA DC signal output in a two-wire system by an electronic circuit.
TwoTechnical performance
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project
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Technical Parameter
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using objects
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Liquids, gases, and vapors
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measuring range
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0-125Pa to 0-40MPa
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output signal
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4-20mADC
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power supply
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12-45VDC, usually 24VDC
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Explosion proof
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a) Explosion proof dIIBT4; b) Intrinsically safe iaIICT6
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Range and Zero Point
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External continuous adjustable
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Positive and negative migration
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After the zero point undergoes positive or negative migration, 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* The large positive transfer amount is 500% of the small calibration range* The large negative transfer amount is 600% of the small calibration range.
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temperature range
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Amplifier operating temperature range:- 29-+93℃;
The LT type is:- 25-+70℃；
Measuring element filled with silicone oil:- 40-+104℃;
Remote transmitter: filled with high-temperature silicone oil+15-+315 ℃, filled with ordinary silicone oil -40-+150 ℃
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Static pressure and overload pressure
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2. 4, 10, 25, 32MPa
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Humidity
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0-100 %RH
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Volume suction capacity
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<0.16cm3
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Damping
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Generally adjustable continuously between 0.2s and 1.67s
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Start Time
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2s, no preheating required
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Isolation Diaphragm
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316L, Hastelloy C-276, Monel, or Tantalum
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Exhaust/Drain Valve
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316, Hastelloy C or Monel
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o-ring
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Nitrile rubber, fluororubber
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Fill liquid
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Silicone oil or inert oil
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Bolt
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Nickel plating on carbon steel
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Electronic shell material
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Low copper aluminum alloy
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Pressure connector
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1/4-18NPT without waist joint; The waist shaped joint is sealed with a 1/2-14NPT or M20 × 1.5 male threaded ball cone surface; The center distances M are 54mm (range 1-4), 55.2mm (range 5) 55.6mm (range 6), 57.2mm (range 7), 57.6mm (range 8) 59mm (range 9 and 0), NPT taper pipe thread in accordance with GB/T12716-91
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Threading hole
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G1/2'
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Weight
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About 5.4kg (without accessories)
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(The following technical data testing conditions are without migration, standard working conditions, filled with silicone oil, and 316 stainless steel isolation diaphragm)
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Accuracy
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±0.2%，±0.25%，±0.5%FS
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Dead zone
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≤0.1%
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stability
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Within six months, the absolute value of the basic error of a large range shall not exceed *
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vibration effect
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In any axial direction, when the vibration frequency is 200Hz, the error is ± 0.05%/g of the upper limit of the measurement range
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Power supply impact
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Less than ± 0.005%/V of the output range
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Load impact
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If the power supply is stable, the load is not affected
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Installation location impact
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*It can generate a zero point error of 0.24KPa, but it can be calibrated and has no impact on the measurement range
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ThreeModel Selection Table
CKY3051 Universal Pressure/Differential Pressure Transmitter Selection Table (- indicates not provided, - indicates provided)
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code
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Select only one transmitter type
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DR
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DP
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HP
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GP
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AP
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|||||||||||||
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3051DR
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Micro differential pressure transmitter
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·
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-
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-
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-
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-
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|||||||||||||
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3051DP
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differential pressure transmitter
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-
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·
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-
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-
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-
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|||||||||||||
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3051HP
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High static pressure differential pressure transmitter
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-
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-
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·
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-
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-
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|||||||||||||
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3051GP
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Gauge pressure transmitter
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-
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-
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-
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·
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-
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|||||||||||||
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3051AP
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Absolute pressure transmitter
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-
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-
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-
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-
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·
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|||||||||||||
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code
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Pressure measurement range (select only one)
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DR
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DP
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HP
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GP
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AP
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|||||||||||
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2
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0-0.08~ 1.6KPa
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·
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-
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-
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-
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-
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|||||||||||
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3
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0-1~ 6KPa
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-
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·
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-
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·
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-
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|||||||||||
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4
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0-6~40KPa
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-
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·
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·
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·
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·
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|||||||||||
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5
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0-40~250KPa
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-
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·
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·
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·
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·
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|||||||||||
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6
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0-0.16~1MPa
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-
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·
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·
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·
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·
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|||||||||||
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7
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0-0.4~2.5MPa
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-
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·
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·
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·
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·
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|||||||||||
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8
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0-1.6~10MPa
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-
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·
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-
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·
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·
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|||||||||||
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9
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0-4~25MPa
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-
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-
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-
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·
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-
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|||||||||||
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0
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0-6~40MPa
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-
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-
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-
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·
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-
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code
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Transmitter output (select only one)
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DR
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DP
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HP
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GP
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AP
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|||||||||||
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E
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４-20ｍA
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·
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·
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·
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·
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·
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|||||||||||
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H
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Intelligent (with Hart communication protocol)
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·
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·
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·
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·
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·
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|||||||||||
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code
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Structural material (select only one)
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Flange/joint drainage/exhaust valve diaphragm filling fluid
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DR
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DP
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HP
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GP
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AP
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||||||||||||
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12
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Carbon steel chrome plated 316SST 316LSST silicone oil
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-
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-
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-
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-
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-
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|||||||||||
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13
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Carbon steel nickel plated Hastelloy C Hastelloy C silicone oil
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-
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-
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-
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-
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-
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|||||||||||
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14
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Carbon steel nickel plated Monel Monel silicone oil
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-
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-
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-
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-
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-
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|||||||||||
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15
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Carbon steel plated with nickel 316SST tantalum silicone oil
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-
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-
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-
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-
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-
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|||||||||||
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22
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316SST 316SST 316LSST silicone oil
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·
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·
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·
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·
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·
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|||||||||||
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23
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316SST 316SST Hastelloy C Silicone Oil
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-
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-
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-
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-
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-
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|||||||||||
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24
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316SST 316SST Monel Silicone Oil
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-
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-
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-
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-
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-
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|||||||||||
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25
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316SST 316SST Tantalum Silicone Oil
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-
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-
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-
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-
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-
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|||||||||||
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33
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Hastelloy C Hastelloy C Hastelloy C Silicone oil
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-
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-
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-
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-
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-
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|||||||||||
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code
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*Great pressure
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DR
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DP
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HP
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GP
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AP
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|||||||||||
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A
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2 MPa
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·
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-
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-
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-
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-
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B
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4 MPa
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·
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·
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-
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-
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-
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C
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10MPa
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-
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·
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-
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-
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-
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E
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25MPa
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-
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-
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·
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-
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-
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F
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32MPa
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-
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-
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·
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-
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-
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|||||||||||
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code
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Additional features (select only one item of the same category)
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DR
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DP
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HP
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GP
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AP
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|||||||||||
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M1
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Simulated scale, linear header, 0-100%
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·
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·
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·
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·
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·
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|||||||||||
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M3
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LCD digital display meter head
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·
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·
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·
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·
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·
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|||||||||||
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B1
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2-inch pipe bending bracket
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·
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·
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·
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·
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·
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|||||||||||
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B2
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Board mounted bending bracket
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·
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·
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·
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·
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·
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|||||||||||
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B3
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2-inch pipe mounted flat bracket
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·
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·
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·
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·
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·
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|||||||||||
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C0
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1/2-14NPT taper pipe female thread
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·
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·
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·
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·
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·
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|||||||||||
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C1
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1/2-14NPT pressure joint rear welded with ф 14 pressure pipe
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·
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·
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·
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·
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·
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|||||||||||
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C2
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T-shaped threaded joint M20 × 1.5
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·
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·
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·
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·
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·
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|||||||||||
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D1
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Side drain/exhaust is located at the upper part of the pressure chamber
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·
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·
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·
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·
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|||||||||||
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D2
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Side drain/exhaust is located at the lower part of the pressure chamber
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·
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·
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|||||||||||
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d
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Explosion proof type, d II BT4
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|||||||||||
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i
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Intrinsic safety type, ia II C
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||||||||||||
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Factory range
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(R= )
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|||||||||||||||||
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3051DP6P 4 E 12 B M1 B3(R=0-25KPa) (Example of Selection)
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