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ECA series transmitter
Overview: The OW-ECA series capacitive transmitter is our company's introduction of advanced foreign technology and equipment. Key raw materials, comp
Product details
The OW-ECA series capacitive transmitter is a product of our company's introduction of advanced foreign technology and equipment. Key raw materials, components, and parts are all imported, and the entire machine undergoes strict assembly and testing. It has the characteristics of advanced design principles, complete variety and specifications, easy installation and use (specifications and dimensions are fully compatible with the original EJA), and beautiful appearance. This product is divided into two types: intelligent and ordinary, which meet users' various selection requirements and have strong practical value. Currently, this series of products has been widely used in industries such as petroleum, chemical, metallurgy, power, food, papermaking, medicine, and machinery manufacturing.
characteristic
★ High precision;
★ 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, HAST-C, MONEL and other corrosion-resistant materials)
★ Explosion proof structure, all-weather use.
In addition to the inherent characteristics of general capacitive transmitters, S-type intelligent transmitters also have the following features:
★ Intelligent electronic components are composed of only one board
★ Range ratio of 15:1 or 10:1
★0-0.6～0-42000kPa
★ Adjust the range and zero point locally by pressing the button
★ Can update existing ECA analog transmitters into intelligent instruments
★ Compliant with the HART protocol, the HART communicator 268 and 275 can communicate with this smart meter in both directions without interrupting the output signal
★ Bidirectional communication with the host in a distributed control system using the HART protocol
★ Equipped with self diagnosis and remote diagnosis functions
Working principle
The process pressure is transmitted to the center measuring diaphragm of the delta chamber through the isolation diaphragms 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 is converted into a differential signal, which is then converted into a 4-20mADC output signal in a two-wire system by an electronic circuit.
Function Parameter
Target audience: liquids, gases, and vapors
Measurement range: 0-0.16kPa to 0-40MPa
Output signal: 4-20mADC (special for four wire 220VAC power supply, 0-10mADC output)
Power supply: 12-45VDC, generally 24VDC (see load characteristics in the figure)
Load characteristics: Related to the power supply, the load capacity at a certain power supply voltage is shown in the figure. The relationship between load impedance RL and power supply voltage VS is RL ≤ 50 (Vs-12)
Indicator: pointer type linear indication of 0-100% scale and square root indication of 0-10% scale, as well as 31/2-digit LCD display (0-100% linear)
Explosion proof: a. Explosion proof type d Ⅱ BT5 b. Intrinsically safe type ia Ⅱ CT6
Range and zero point: externally continuously adjustable, intelligent adjustment can be made through local buttons or via HART communication. 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. The maximum positive transfer is 500% of the minimum calibration range, and the maximum negative transfer is 600% of the minimum calibration range. The maximum positive and negative transfer of the flow transmitter is 10% of the calibrated range.
Temperature range: Amplifier operating temperature range: -38~+93 ℃
Measuring element filled with silicone oil: -40~+104 ℃
When filling high-temperature silicone oil into a flange transmitter:+15~+315 ℃
Ordinary silicone oil: -40~+150 ℃
Static pressure and overload pressure: 4, 10, 25, 32MPa
Humidity: Relative humidity 0-100%
Volume suction capacity: ＜ 0.16cm3
Damping (step response): When filled with silicone oil, it is generally continuously adjustable between 0.2s and 1.67
Start time: 2s, no preheating required
technical data
(Without migration, under standard working conditions, filled with silicone oil, 316 stainless steel isolation diaphragm)
Accuracy: ± 0.075%, ± 0.1%, ± 0.25%
Dead zone: None (≤ 0.1%)
Stability: Absolute value of basic error not exceeding the maximum range within six months
Fault alarm: (Intelligent type with) The self diagnostic program detects a fault and simulates an alarm when the output is higher than 22mA or lower than 3.8mA. The alarm level can be selected through the switch on the electronic component.
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