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technical article
Application scope, technical indicators and functional characteristics of liquid crystal display regulator
2012-1-6 11:17:47

Intelligent dual-channel LCD display regulator

● Overview


系列产品采用表面封装模块化工艺,大大提高了仪表的抗干扰能力,具有显示、控制、变送、通讯、万能信号输入等功能,适用于温度、湿度、压力、液位、 The LCD display regulator series products use the surface-packed modular technology, which greatly improves the anti-interference ability of the instrument. It has functions such as display, control, transmission, communication, and universal signal input. It is suitable for temperature, humidity, pressure, level,

Display and control of various physical quantity detection signals such as instantaneous flow and speed, and can perform high-precision linear correction on various non-linear input signals. Can be widely used in power, metallurgy, chemical, petrochemical, paper printing and dyeing, brewing, tobacco, aerospace base and other fields.


The latest jumper-free technology is used to make the input port have universal signal input function. By changing the internal parameters, a variety of input signals can be realized (various thermocouples, thermal resistors, remote pressure, mV, standard voltage / standard current). Signal)

Easily switch. The optimized design and continuous improvement of the production process of the circuit board reduce the temperature drift and improve the anti-interference performance to ensure the stability and reliability of the product in the long-term work. High brightness LED digital display and high resolution

Light bar display (proportion display) makes measurement / control value display clearer and more intuitive.


The output circuits are all optically isolated and have strong anti-interference ability. With serial communication interface, it can carry out two-way communication with various devices with serial interface to form a network control system. With a variety of standard external dimensions, it can be applied to various measurement and control occasions.

The whole machine adopts a snap-in structure, which is very easy to install.


● Scope of application


是智能型、高精度的双路LCD显温度、压力、液位、测力、扭矩等物理量控制测量仪表,与两路温度、压力、液位、测力、扭矩传感器及变送器 YK-12LCD intelligent liquid crystal display control instrument is an intelligent, high-precision dual-channel LCD display temperature, pressure, liquid level, force, torque and other physical quantity control measuring instruments, and two channels of temperature, pressure, liquid level, force, torque Sensors and transmitters

Matching can form temperature, pressure, level measurement force, torque measurement and control system of various ranges and specifications.


Features


Universal input function (it is better to set each input type Sn as standard when ordering)


Automatic and manual calibration functions


Multiple protection, isolation design, strong anti-interference ability, high reliability


Good software platform with secondary development capabilities to meet special functions


Advanced modular structure, with powerful instrument chip, function combination and system upgrade are very convenient


● Main technical indicators


Basic error: 0.5% FS or 0.2% FS ± 1 word


Resolution: 1/20000, 14-bit A / D converter (maximum 18-bit A / D converter, specified when ordering)


Display mode: High-brightness LCD (blue screen and white text)


Input signal: Analog / thermocouple: B, S, K, E, J, T, WRe, etc.


Thermal resistance: Pt100, Cu50, Pt100.1


· Current: 0 ~ 10mA, 4mA ~ 20mA, etc. (input impedance≤250Ω)


Voltage: 0 to 5V, 1V to 5V, mV, etc. (input impedance ≥1MΩ)


· Remote pressure resistance: (1 ~ 379) Ω (please specify when ordering)


Sampling cycle: 0.2S (10 ~ 200 times / second, user selectable)


Switching alarm output: two-limit alarm or four-limit alarm, alarm mode and alarm sensitivity can be set, relay output contact capacity AC220V / 3A or AC220V / 1A. (Each channel can take up to 8 relay alarm outputs, users need to specify when ordering)


Transmission output: · DC 4mA ~ 20mA (load resistance≤300Ω)


· DC 0 ~ 10mA (load resistance≤1.5KΩ)


· DC 1V ~ 5V (load resistance ≥250KΩ)


· DC 0 ~ 5V (load resistance ≥250KΩ)


(Each channel can take up to 4 analog outputs, users need to specify when ordering).


Features: Control method · Select upper limit, lower limit or upper limit, lower limit control


Control setpoint, control setpoint and hysteresis can be set freely within full range


Temperature compensation: 0 ~ 50 ℃ temperature automatic compensation


Parameter setting · Panel touch button digital setting · Parameter setting value is permanently saved after power off

Parameter setting value password lock


Protection method: Thermocouple thermal resistance input disconnection alarm, relay output status LED indication


· Input over / under range alarm · Input over range flash alarm


· Automatic reset of abnormal operation


Ambient temperature: (-20 ~ 70) ℃ (after 30 minutes of running at room temperature, it can gradually withstand the extreme temperature)


(0 ~ 50) ℃ (Thermocouple signal input)


Relative humidity: ≤85% non-condensing avoid use in corrosive and flammable and explosive gas


Communication output: interface mode-isolated serial two-way communication interface RS485 / RS232 / Modem


Baud rate: 1200 ~ 9600bps


Feed output: DC24V / 30mA (max. 400mA, specified when ordering)


Power supply: switching power supply 85 ~ 265VAC / DC24V, power consumption below 4W